MONGODB_UK_LIMITED

MONGODB UK LIMITED

STRATEGIC REPORT

FOR THE YEAR ENDED 31 JANUARY 2026

The directors present the strategic report for the year ended 31 January 2026.

Fair review of the business

MongoDB UK Limited ("The Company") is a wholly owned subsidiary of MongoDB Limited.

The Company provides support services to MongoDB Limited. MongoDB is the leading modern, general purpose database platform. The directors have no plans to change the activities and operations of the Company in the foreseeable future. As shown in the Company's statement of comprehensive income on page 9, the Company's revenue decreased by 5% compared to the prior year. The Company operates on a cost-plus basis, under which its revenue is derived from its operating costs plus an agreed margin; accordingly, FY26's lower share-based compensation and consultancy costs reduced the Company's cost base, and revenue decreased correspondingly.

The balance sheet on page 10 of the financial statements shows that the company's financial position at the year end has, in cash terms, increased by 27% and with an overall positive net asset position of £ 22.48 Million driven by the transfer of profit for the year into retained earnings. Details of amounts owed from its parent company are shown in note 13 on page 22.

The performance of the MongoDB Inc group, which includes the company, is discussed in the group's Annual Report which does not form part of this Report. The registered office is 1633 Broadway, 38th Floor, New York, 10019.

Principal risks and uncertainties

The directors consider the principal risks and uncertainties to be:

Currency Risk

As the company invoices MongoDB Limited in GBP, currency risk is not a significant issue from an income perspective. Regarding expenditure, the company is exposed to foreign exchange risk, but this is not material in the overall context of the company. Therefore, currency risk is not a significant issue in risk management.

Price Risk

The company uses a range of suppliers for each area of provision to ensure that market prices for purchases are achieved. The company also has a range of domestic and overseas suppliers to choose from. The company trades with MongoDB Limited and receives a fixed mark-up on cost for its expenses.

Credit Risk

The company trades with MongoDB Limited. The nature of this relationship assists management in controlling its credit risk. The directors place importance on continuous monitoring of the performance of the business and hold board meetings as deemed necessary to review company's performance in detail. For its suppliers, the company holds weekly payment runs for its suppliers after closely monitoring estimated future cash flows and mitigates the risk through assessment of the credit worthiness and other information available in public domain.

Liquidity Risk

Management control and monitor the cash flow on a regular basis, including forecasting future cash flows. Funding requirements are met on a timely basis to ensure that there is sufficient cash. The company holds no long term debt.

Insurance Risk

The company incurs exposure to employer, public and property damage liability by virtue of the nature of its operations. The company places strong emphasis on health and safety and risk management practices and maintains insurance cover which further mitigates this risk.

Development and performance

The company invested in sales, marketing and R&D to drive sales, brand awareness and product offerings in order to support MongoDB Limited. The company has invested in headcount in order to provide these services to MongoDB Limited. The revenue of the company is determined by the mark-up on the support services provided to MongoDB Limited.

Decrease

Key performance Indicators

2026

2025

Revenue

77,262,295

80,963,760

74,443,074

78,209,875

Administrative expenses

2026

2025

Increase

Research and development expenditure

3,962,093

3,363,364

18%

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MONGODB UK LIMITED

STRATEGIC REPORT (CONTINUED)

FOR THE YEAR ENDED 31 JANUARY 2026

Statement by the Directors in performance of their duties in accordance with s172(1) Companies Act 2006

The Directors of the Company, as those of all UK companies, must act in accordance with a set of general duties. These duties are detailed in section 172 of the UK Companies Act 2006 and include a duty to promote the success of the Company and are summarised as follows:

'A director of a company must act in the way he considers, in good faith, would be most likely to promote the success of the company for the benefit of its members as a whole, and in doing so have regard (amongst other matters) to:

(i)

the likely consequences of any decision in the long term,

(ii)

the interests of company's employees,

(iii)

the need to foster company's business relationships with customers, suppliers and others,

(iv)

the impact of company's operations on the community and the environment,

(v)

the desirability of the company maintaining a reputation for high standards of business conduct, and

(vi)

the need to act fairly as between members of the company.'

The following paragraphs summarise how the Directors fulfil their duties:

Risk Management

MongoDB is the leading modern, general purpose database platform. Our robust platform enables developers to build and modernise applications rapidly and cost-effectively across a broad range of use cases. As we grow, our business and our risk environment also become more complex. It is therefore vital that we effectively identify, evaluate, manage, and mitigate the risks we face, and that we continue to evolve our approach to risk management. Alongside the principal risks set out above we engage external consultants and advisors to ensure that we monitor and maintain an effective oversight of regulatory changes and compliance with our ongoing legal and regulatory requirements.

Our People

The company believes that its employees and the culture it has established are critically important to its success. In order to continue to compete and succeed in the highly competitive and rapidly evolving market, it is crucial that the company continues to attract, retain and motivate qualified employees. To support these objectives, the company strives to maintain its company culture, offer competitive compensation and benefits, support the health and well-being of its employees, foster an inclusive, diverse and engaged workforce and develop talent.

Business Relationships

As a key requirement for building the business of the Company, the Board is very aware of the need to foster good relationships with clients, the community, and other important stakeholders. The Board looks to discharge these duties by engaging in regular dialogue with both customers and service providers and attending industry events to further build and gain new relationships with key people within the industry.

Community and Environment

The Company is working to make environmental sustainability a core component of how it operates and have begun to intertwine it with its overall business strategy. The Company believes that environmentally responsible operating practices will benefit its stockholders, partners, customers, and employees.

Maintaining a reputation for high standards of business conduct

As the Board of Directors, our intention is to behave responsibly and ensure that management operates the business in a responsible manner. To operate within the high standards of business conduct and good governance expected for a business such as ours, will help the business grow over the coming years.

Approved and authorised by the board on October 28th, 2026 and signed on its behalf by:

A G Stephens Director

Date: October 28th, 2026

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MONGODB UK LIMITED

DIRECTORS REPORT

FOR THE YEAR ENDED 31 JANUARY 2026

The directors present their annual report and financial statements for the year ended 31 January 2026.

Principal activities

MongoDB UK Limited provides support services to MongoDB Limited. MongoDB is the leading modern, general purpose database platform. The directors have no plans to change the activities and operations of the company in the foreseeable future.

Branches

The Company has branches outside the UK in Finland and South Korea.

Results and dividends

The results for the year are set out on page 9.

No interim dividend was paid during the year (2025: £nil). The directors do not recommend payment of a final dividend.

Directors

The directors who held office during the year and up to the date of signature of the financial statements were as follows:

A G Stephens

TM Bull (resigned on 13 February 2026)

P Johnston (appointed on 01 April 2026)

Events since the end of the reporting period

There are no significant events since the end of the reporting year other than those included in Note 24.

Supplier payment policy

The company's current policy concerning the payment of trade creditors is to follow the CBI's Prompt Payers Code (copies are available from the CBI, Centre Point, 103 New Oxford Street, London WC1A 1DU).

The company's current policy concerning the payment of trade creditors is to :

(i)

settle the terms of payments with suppliers when agreeing the terms of each transactions;

(ii)

ensure that suppliers are made aware of the terms of payment by inclusion of the relevant terms in contracts; and

(iii)

pay in accordance with the company's contractual and other legal obligations.

Future developments

As of 31 January 2026, there are no future developments planned which are outside of the current course of business. The company will continue to trade and carry on its operations as normal. The company will continue to invest as appropriate to ensure continued growth.

Employee engagement

The company recognises that its employees are fundamental to its success. The directors are committed to maintaining open and effective communication with employees and to creating a positive working environment.

During the year, the company conducted an employee engagement survey to gather feedback and understand employees' views on various aspects of the workplace. The results were reviewed by management and actions were identified to further enhance engagement and wellbeing.

The company also provides training and development opportunities from time to time to support employees' professional growth and to ensure that they have the skills necessary to perform their roles effectively. The directors believe that these initiatives help to foster motivation, collaboration and retention across the workforce.

Disabled Employee

MongoDB is committed to fostering an inclusive and equitable working environment, ensuring compliance with the Equality Act 2010. The company supports individuals with disabilities across recruitment, training, and career development, including offering reasonable accommodations during the application and interview process.

MongoDB's Equal Employment Opportunity (EEO) framework prohibits discrimination and ensures that employment decisions are based solely on valid job requirements.

Management is responsible for promoting a workplace culture free from harassment, intimidation, and retaliation. As part of its ongoing efforts, MongoDB encourages voluntary, confidential self-identification of disabilities, and actively advances accessibility, equality, and professional growth.

Research and Development

The Company engages in research and development (R&D) activities exclusively to provide services to its parent company, MongoDB Limited. These activities form part of the Group's overall strategy for product development and innovation.

Political Donations

The company did not make any political donations or incur any political expenditure during the year (2025: £nil).

Energy and carbon report

MongoDB UK Limited, with main office based in London, England, provides support services to MongoDB Limited. It qualifies for reporting scope 1 & 2 energy usage and carbon emissions within the Directors' Report by meeting two or more thresholds regarding revenue, balance sheet total, or number of employees during the current reporting year.

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MONGODB UK LIMITED

DIRECTORS REPORT

FOR THE YEAR ENDED 31 JANUARY 2026

Greenhouse gas emissions (GHG emissions) are identified as one of three groups, known as scopes. These scopes relate to means of control, as follows:

Scope 1: Direct emissions - GHG emissions from the sources which are owned or controlled by the Company including combustion of fuel for transport & operation of facilities.

Scope 2: Indirect emissions- GHG emissions from purchased electricity, heat, steam, and cooling.

Scope 3: Other indirect emissions - GHG emissions as a consequence of the Company's actions.

MongoDB UK limited GHG emissions and energy use in the United Kingdom during the year were as follows:

2026

2025

Energy consumption

kWh

Aggregate energy consumption in the year

124,621

114,912

Emissions of CO2 equivalent

2026

2025

metric tonnes

Scope-1 direct emissions

-Gas combustion

3.70

10.70

-fuel consumed for owned transport

3.70

10.70

Scope-2 indirect emissions

- electricity purchased

18.40

17.00

Total gross emissions

22.10

27.70

Intensity ratio

Tones CO2 per full time employee

0.08

0.11

Quantification and reporting methodology

The methodology for calculating and reporting GHG emissions: emissions were calculated following the GHG Reporting Protocol (Corporate Standard) using the Watershed platform. Energy usage data was collected or estimated based on building square-footage for all facilities, and was combined with emissions factors from the US EPA, Ecoinvent, TCR and other data sources to calculate GHG emissions. Electricity emissions factors are chosen based on geography to reflect the emissions intensities of the facilities' local grid.

The energy consumption used by MongoDB UK Limited primarily relates to the electricity consumption of the office based in London. This office is used by all employees in MongoDB UK for working, having meetings, collaborating & building social ties with each other. These activities are essential for the functioning of the business in order to meet its strategic and operational aims of providing support services to MongoDB Limited.

Intensity measurement

The intensity ratio is calculated by the total energy consumption used to calculate emissions divided by the number of employees of 265 (2025: 250).

Measures taken to improve energy efficiency

In FY23, we announced our goal to reduce Scope 2 emissions to zero by 2026 through the thoughtful sourcing of Renewable Energy Credits (RECs) and the integration of on-site renewable energy solutions. As a growing company, we evaluate the success of our energy and carbon reduction efforts primarily using intensity metrics, based on revenue and headcount from our FY23 baseline.

In FY25, we achieved a 55% reduction in Scope 2 emissions and are on track to reach 100% by the end of 2026. We believe that operating in an environmentally responsible manner benefits our stockholders, partners, customers, and employees.

Statement of directors' responsibilities

The directors are responsible for preparing the annual report and the financial statements in accordance with applicable law and regulations.

Company law requires the directors to prepare financial statements for each financial year. Under that law the directors have elected to prepare the financial statements in accordance with applicable law and United Kingdom Accounting Standards (United Kingdom Generally Accepted Accounting Practice), including Financial Reporting Standard 102 ‘The Financial Reporting Standard applicable in the UK and Republic of Ireland'. Under company law, the directors must not approve the financial statements unless they are satisfied that they give a true and fair view of the state of affairs of the company and of the profit or loss of the company for that period. In preparing these financial statements, the directors are required to:

(i)

select suitable accounting policies and then apply them consistently;

(ii)

make judgements and accounting estimates that are reasonable and prudent;

(iii)

state whether the financial statements have been prepared in accordance with applicable accounting standards, identify those standards, and note the effect and the reasons for any material departure from those standards; and

(iv)

prepare the financial statements on the going concern basis unless inappropriate to presume that the company will continue in business.

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MONGODB UK LIMITED

DIRECTORS REPORT

FOR THE YEAR ENDED 31 JANUARY 2026

The directors are responsible for keeping adequate accounting records that are sufficient to show and explain the company's transactions and disclose with reasonable accuracy at any time the financial position of the company and enable them to ensure that the financial statements comply with the Companies Act 2006. They are also responsible for safeguarding the assets of the company and hence for taking reasonable steps for the prevention and detection of fraud and other irregularities.

Strategic report

The company has chosen in accordance with Companies Act 2006, s. 414C(11) to set out in the company's strategic report information required by Large and Medium-sized Companies and Groups (Accounts and Reports) Regulations 2008, Sch.7 to be contained in the directors' report. It has done so in respect of financial risk management and employees related information.

Auditor

Grant Thornton has indicated its willingness to be reappointed as auditor for another term in accordance with section 485 of the Companies Act 2006.

Disclosure of information to the auditors

So far as each person who was a director at the date of approving this report is aware, there is no relevant audit information of which the company's auditor is unaware. Additionally, the directors individually have taken all the necessary steps that they ought to have taken as directors in order to make themselves aware of all relevant audit information and to establish that the company's auditor is aware of that information.

Approved and authorised by the board on October 28th, 2026 and signed on its behalf by:

A G Stephens Director

Date:

October 28th, 2026

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MONGODB UK LIMITED

INDEPENDENT AUDITOR'S REPORT

TO THE MEMBERS OF MONGODB UK LIMITED

Opinion

We have audited the financial statements of MongoDB UK Limited (“Company”), which comprise the Statement of comprehensive income, Balance sheet, and Statement of changes in equity for the year ended 31 January 2026, and the related notes to the financial statements, including a summary of significant accounting policies.

The financial reporting framework that has been applied in the preparation of the financial statements is applicable law and accounting standards issued by the Financial Reporting Council including FRS 102 “The Financial Reporting Standard applicable in the UK and Republic of Ireland” (United Kingdom Generally Accepted Accounting Practice).

In our opinion, MongoDB UK Limited's financial statements:

give a true and fair view in accordance with United Kingdom Generally Accepted Accounting Practice of the assets, liabilities and financial position of the Company as at 31 January 2026 and of its financial performance for the year then ended; and

have been properly prepared in accordance with the requirements of the Companies Act 2006.

Basis for opinion

We conducted our audit in accordance with International Standards on Auditing (UK) (‘ISAs (UK)') and applicable law. Our responsibilities under those standards are further described in the ‘Responsibilities of the auditor for the audit of the financial statements' section of our report. We are independent of the Company in accordance with the ethical requirements that are relevant to our audit of the financial statements in the United Kingdom, including the FRC's Ethical Standard and the ethical pronouncements established by Chartered Accountants Ireland, applied as determined to be appropriate in the circumstances for the entity. We have fulfilled our other ethical responsibilities in accordance with these requirements. We believe that the audit evidence we have obtained is sufficient and appropriate to provide a basis for our opinion.

Conclusions relating to going concern

In auditing the financial statements, we have concluded that the directors' use of going concern basis of accounting in the preparation of the financial statements is appropriate.

Based on the work we have performed, we have not identified any material uncertainties relating to events or conditions that, individually or collectively, may cast significant doubt on the Company's ability to continue as a going concern for a period of at least twelve months from the date when the financial statements are authorised for issue.

Our responsibilities and the responsibilities of the directors with respect to going concern are described in the relevant sections of this report.

Other information

Other information comprises information included in the annual report, other than the financial statements and our auditor's report thereon, including the Directors' Report and the Strategic Report. The directors are responsible for the other information. Our opinion on the financial statements does not cover the other information and, except to the extent otherwise explicitly stated in our report, we do not express any form of assurance conclusion thereon.

In connection with our audit of the financial statements, our responsibility is to read the other information and, in doing so, consider whether the other information is materially inconsistent with the financial statements or our knowledge obtained in the audit, or otherwise appears to be materially misstated. If we identify such material inconsistencies in the financial statements, we are required to determine whether there is a material misstatement in the financial statements or a material misstatement of the other information. If, based on the work we have performed, we conclude that there is a material misstatement of this other information, we are required to report that fact.

We have nothing to report in this regard.

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MONGODB UK LIMITED

INDEPENDENT AUDITOR'S REPORT

TO THE MEMBERS OF MONGODB UK LIMITED (continued)

Opinions on other matters prescribed by the Companies Act 2006

In our opinion, based on the work undertaken in the course of the audit:

the information given in the Strategic Report and the Directors' Report for the financial year for which the financial statements are prepared is consistent with the financial statements; and

the Strategic Report and the Directors' Report have been prepared in accordance with applicable legal requirements.

Matters on which we are required to report by exception

In the light of the knowledge and understanding of the company and its environment obtained in the course of the audit, we have not identified any material misstatements in the Strategic Report and the Directors' Report. We have nothing to report in respect of the following matters where the Companies Act 2006 requires us to report to you if, in our opinion:

adequate accounting records have not been kept, or returns adequate for our audit have not been received from branches not visited by us; or

the financial statements are not in agreement with the accounting records and returns; or

certain disclosures of directors' remuneration specified by law are not made; or

we have not received all the information and explanations we require for our audit;

Responsibilities of management and those charged with governance for the financial statements

As explained more fully in the Directors' responsibilities statement, management is responsible for the preparation of the financial statements which give a true and fair view in accordance with United Kingdom Generally Accepted Accounting Practice, including FRS 102, and for such internal control as directors determine necessary to enable the preparation of financial statements are free from material misstatement, whether due to fraud or error.

In preparing the financial statements, management is responsible for assessing the Company's ability to continue as a going concern, disclosing, as applicable, matters related to going concern and using the going concern basis of accounting unless management either intends to liquidate the company or to cease operations, or has no realistic alternative but to do so.

Those charged with governance are responsible for overseeing the Company's financial reporting process.

Responsibilities of the auditor for the audit of the financial statements

The objectives of an auditor are to obtain reasonable assurance about whether the financial statements as a whole are free from material misstatement, whether due to fraud or error, and to issue an auditor's report that includes their opinion. Reasonable assurance is a high level of assurance, but is not a guarantee that an audit conducted in accordance with ISAs (UK) will always detect a material misstatement when it exists. Misstatements can arise from fraud or error and are considered material if, individually or in the aggregate, they could reasonably be expected to influence the economic decisions of users taken on the basis of these financial statements.

A further description of an auditor's responsibilities for the audit of the financial statements is located on the Financial Reporting Council's website at: www.frc.org.uk/auditorsresponsibilities. This description forms part of our auditor's report.

Explanation as to what extent the audit was considered capable of detecting irregularities, including fraud

Irregularities, including fraud, are instances of non-compliance with laws and regulations. We design procedures in line with our responsibilities, outlined above, to detect material misstatements in respect of irregularities, including fraud. Owing to the inherent limitations of an audit, there is an unavoidable risk that material misstatement in the financial statements may not be detected, even though the audit is properly planned and performed in accordance with the ISAs (UK). The extent to which our procedures are capable of detecting irregularities, including fraud is detailed below.

Based on our understanding of the Company and industry, we identified that the principal risks of non-compliance with laws and regulations related to compliance with data protection, employment and environmental regulations, and we considered the extent to which non-compliance might have a material effect on the financial statements. We also considered those laws and regulations that have a direct impact on the preparation of the financial statements such as the Companies Act 2006 and UK tax legislation. The Audit engagement partner considered the experience and expertise of the engagement team including ITGC specialists to ensure that the team had appropriate competence and capabilities to identify or recognise non-compliance with the laws and regulation. We evaluated management's incentives and opportunities for fraudulent manipulation of the financial statements (including the risk of override of controls), and determined that the principal risks were related to posting inappropriate journal entries to manipulate financial performance and management bias through judgements and assumptions in significant accounting estimates, in particular in relation to significant one-off or unusual transactions. We apply professional scepticism through the audit to consider potential deliberate omission or concealment of significant transactions, or incomplete/inaccurate disclosures in the financial statements.

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MONGODB UK LIMITED

INDEPENDENT AUDITOR'S REPORT

TO THE MEMBERS OF MONGODB UK LIMITED (continued)

Responsibilities of the auditor for the audit of the financial statements (continued)

In response to these principal risks, our audit procedures included but were not limited to:

enquiries of management on the policies and procedures in place regarding compliance with laws and regulations, including consideration of known or suspected instances of non-compliance and whether they have knowledge of any actual, suspected or alleged fraud;

inspection of the Company's regulatory and legal correspondence and review of minutes of directors' meetings during the year to corroborate inquiries made;

gaining an understanding of the entity's current activities, the scope of authorisation and the effectiveness of its control environment to mitigate risks related to fraud;

discussion amongst the engagement team in relation to the identified laws and regulations and regarding the risk of fraud, and remaining alert to any indications of non-compliance or opportunities for fraudulent manipulation of financial statements throughout the audit;

identifying and testing journal entries to address the risk of inappropriate journals and management override of controls;

designing audit procedures to incorporate unpredictability around the nature, timing or extent of our testing;

challenging assumptions and judgements made by management in their significant accounting estimates, including recoverability of intercompany receivable, recognition and recoverability of deferred tax assets and determining the incremental borrowing rate used to discount lease liabilities;

review of the financial statement disclosures to underlying supporting documentation and inquiries of management.

The primary responsibility for the prevention and detection of irregularities including fraud rests with those charged with governance and management. As with any audit, there remains a risk of non-detection or irregularities, as these may involve collusion, forgery, intentional omissions, misrepresentations or override of internal controls.

The purpose of our audit work and to whom we owe our responsibilities

This report is made solely to the company's members, as a body, in accordance with Chapter 3 of Part 16 of the Companies Act 2006. Our audit work has been undertaken so that we might state to the company's members those matters we are required to state to them in an auditor's report and for no other purpose. To the fullest extent permitted by law, we do not accept or assume responsibility to anyone other than the company and the company's members as a body, for our audit work, for this report, or for the opinions we have formed.

Graham Stirling (Senior Statutory Auditor)

For and on behalf of

Grant Thornton

Chartered Accountants & Statutory Auditors

13-18 City Quay

Dublin

28 October 2026

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MONGODB UK LIMITED

STATEMENT OF COMPREHENSIVE INCOME

FOR THE YEAR ENDED 31 JANUARY 2026

Notes

2026

2025

77,262,295

80,963,760

Revenue

Administrative expenses

(74,443,074)

(78,209,875)

Operating profit

2,819,221

2,753,885

5,831

17,125

Interest receivable and similar income

Interest payable and similar expenses

(160,432)

(14,628)

Profit before taxation

2,664,620

2,756,382

1,213,335

(167,830)

Tax on profit

Profit for the financial year

3,877,955

2,588,552

Other comprehensive income for the year

Currency translation gain taken to retained earnings

47,694

41,673

Total comprehensive income for the year

2,630,225

3,925,649

The statement of comprehensive income has been prepared on the basis that all operations are continuing operations.

The notes on pages 12 to 24 form part of these financial statements.

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MONGODB UK LIMITED

BALANCE SHEET

AS AT

31 JANUARY 2026

Notes

2026

2025

Non-Current Assets

Fixed assets

3,442,084

2,545,941

Deferred tax assets

1,311,465

4,753,549

2,545,941

Current assets

Debtors

11,178,735

10,087,309

Cash at bank

18,762,312

14,789,950

29,941,047

24,877,259

(9,492,384)

(10,542,586)

Creditors: amounts falling due within one year

____________

Net current assets

15,384,875

19,398,461

Total assets less current liabilities

17,930,816

24,152,010

(1,504,638)

Creditors: amounts falling due after more than one year

(169,482)

Provision for other liabilities

(153,311)

(1,674,120)

(153,311)

Net assets

22,477,890

17,777,505

Capital and reserves

Called-up share capital

100

Share-based payment reserve

2,920,467

1,881,566

19,557,323

15,895,839

Profit and loss reserves

Total equity

22,477,890

17,777,505

The notes on pages 12 to 24 form part of these financial statements.

The financial statements were approved by the board of directors and authorised for issue on

October 28th, 2026

and are signed on its behalf by:

A G Stephens

Director

Company Registration No. 07830865

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MONGODB UK LIMITED

STATEMENT OF CHANGES IN EQUITY

FOR THE YEAR ENDED 31 JANUARY 2026

Called-up share capital

Share- based payment reserve

Profit and loss reserves

Total

100

851,907

13,265,614

14,117,621

Balance as at 1 February 2024

Year ended 31 January 2025:

2,588,552

Profit for the year

Other comprehensive income:

41,673

Currency translation differences

Total comprehensive income for the year

2,630,225

Share-based payments expense

15,582,266

Share-based payment recharges received from ultimate parent

(14,552,607)

Balance as at 31 January 2025 (pre transition)

100

1,881,566

15,895,839

17,777,505

Transition adjustments (Note 23)

(264,165)

Balance as at 31 January 2025 (post transition)

100

1,881,566

15,631,674

17,513,340

Year ended 31 January 2026:

3,877,955

Profit for the year

Other comprehensive income:

47,694

Currency translation differences

Total comprehensive income for the year

3,925,649

Share-based payments expense

12,584,538

Share-based payment recharges received from ultimate parent

(11,545,637)

Balance as at 31 January 2026

100

2,920,467

19,557,323

22,477,890

The notes on pages 12 to 24 form part of these financial statements.

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MONGODB UK LIMITED

NOTES TO THE FINANCIAL STATEMENTS FOR THE YEAR ENDED 31 JANUARY 2026

General

MongoDB UK Limited is a private company limited by shares incorporated in England and Wales. The registered office is 12th Floor, 240 Blackfriars Road, London, SE1 8NW. The Company is a wholly owned subsidiary of MongoDB Limited and provides business support services to it.

Accounting policies

2.1

Basis of preparation of financial statements

These financial statements have been prepared in accordance with FRS 102 “The Financial Reporting Standard applicable in the UK and Republic of Ireland” (“FRS 102”) and the requirements of the Companies Act 2006.

The financial statements are prepared in sterling, which is the functional currency of the company. Monetary amounts in these financial statements are rounded to the nearest £.

The financial statements have been prepared under the historical cost convention unless otherwise specified within these accounting policies.

This company is a qualifying entity for the purposes of FRS 102, being a member of a group where the parent of that group prepares publicly available consolidated financial statements, including this company, which are intended to give a true and fair view of the assets, liabilities, financial position and profit or loss of the group. The company has therefore taken advantage of exemptions from the following disclosure requirements:

the requirements of Section 7 Statement of Cash Flows;

the requirements of Section 3 Financial Statement Presentation paragraph 3.17(d);

the requirements of Section 11 Financial Instruments paragraphs 11.42, 11.44 to 11.45, 11.47, 11.48(a)(iii), 11.48(a)(iv), 11.48(b) & 11.48(c);

the requirements of Section 12 Other Financial Instruments paragraphs 12.26 to 12.27, 12.29(a), 12.29(b) & 12.29A;

the requirements of Section 26 Share-based Payment paragraphs 26.18(b), 26.19 to 26.21 & 26.23;

the requirements of Section 33 Related Party Disclosures paragraph 33.7;

. the requirement of FRS 102 paragraph 33.7 to disclose key management personnel;

. the company has applied the mandatory temporary exceptions to the requirements to disclose the effect the international tax reform - Pillar Two model rules introduced in the amendment to IAS 12 adopted by the FRC.

The accounting policies set out below have, unless otherwise stated, been applied consistently to all periods presented in these financial statements.

2.2

Going concern

At the time of approving the financial statements, the directors have a reasonable expectation that the company has adequate resources to continue in operational existence for the foreseeable future. The directors have received an undertaking from MongoDB Inc, the ultimate parent company, that it will continue to make available such funds as are necessary to enable the company to meet liabilities as they fall due for a period of at least 12 months from approval of these financial statements. The company therefore continues to adopt the going concern basis in preparing the financial statements.

2.3

Revenue

The Company provides support services exclusively to its immediate parent undertaking, MongoDB Limited, under a cost-plus arrangement. Revenue is recognised over time as the services are performed, as the customer simultaneously receives and consumes the benefits of the services provided. Transaction consideration is determined based on costs incurred together with an agreed markup.

2.4

Fixed assets

Fixed assets are initially measured at cost and subsequently measured at cost less accumulated depreciation and any impairment losses. Cost includes expenditure that is directly attributable to bringing the asset to the location and condition necessary for it to be capable of operating in the manner intended by management.

Depreciation is charged so as to allocate the cost of assets less their residual value over their estimated useful lives, using the straight-line method.

The estimated useful lives range as follows:

Shorter of the lease term or useful life

Leasehold improvements

20% straight line

Fixtures and fittings Office equipment

33% straight line

The assets' residual values, useful lives and depreciation methods are reviewed, and adjusted prospectively if appropriate, or if there is an indication of a significant change since the last reporting date.

-12-

MONGODB UK LIMITED

NOTES TO THE FINANCIAL STATEMENTS (CONTINUED) FOR THE YEAR ENDED 31 JANUARY 2026

Accounting policies

(Continued)

2.4

Fixed assets (continued)

The gain or loss arising on the disposal of an asset is determined as the difference between the sale proceeds and the carrying value of the asset, and is credited or charged to profit or loss.

2.5

Right-of-use assets

The Company has elected to early adopt the revised Section 20 of FRS 102, Leases, as issued by the Financial Reporting Council (FRC) in its “The Financial Reporting Standard applicable in the UK and Republic of Ireland and other FRSs - Periodic Review 2024”. The revised Section 20 introduces a single lessee accounting model, requiring most leases to be recognised on the Balance Sheet as a right-of-use asset and a corresponding lease liability. This replaces the previous distinction between operating and finance leases. It is effective for accounting periods beginning on or after 1 January 2026. Early adoption is permitted provided all amendments from the review are adopted simultaneously.

The adoption of these amendments has resulted in the Company recognising a right-of-use asset and related lease liability in connection with all former operating leases. The amendments have been applied using the modified retrospective approach, with the cumulative effect of adopting the revised Section 20 being recognised in equity as an adjustment to the opening balance of the retained earnings for the current period. Prior periods have not been restated. On transition, for leases previously accounted for as operating leases, the Company has applied the practical expedient per FRS 102 Section 1.51 to 1.52 where for each lease previously classified as an operating lease, the Company shall recognise a lease liability and right-of-use asset at the date of initial application. The Company shall measure lease liability at the present value of the remaining lease payments, discounted using the Company's incremental borrowing rate or Company's obtainable borrowing rate for each lease at the date of initial application. The Company shall measure right-of-use asset at an amount equal to the lease liability, adjusted by the amount of any prepaid or accrued lease payments relating to that lease recognised in the statement of financial position immediately before the date of initial application.

The Company assesses at contract inception whether a contract is, or contains, a lease. That is, if the contract conveys the right to control the use of an identified asset for a period of time in exchange for consideration.

The Company recognises right-of-use assets at the commencement date of the lease (i.e. the date the underlying asset is available for use). Right-of-use assets are measured at cost, less any accumulated depreciation and impairment losses, and adjusted for any remeasurement of lease liabilities. The cost of right-of-use assets includes the amount of lease liabilities recognised, initial direct costs incurred, and lease payments made at or before the commencement date less any lease incentives received. Right-of-use assets are depreciated on a straight-line basis over the lease term. Depreciation is expensed on a straight-line basis over the shorter of the period of the lease or useful life.

If ownership of the leased asset transfers to the Company at the end of the lease term or the cost reflects the exercise of a purchase option, depreciation is calculated using the estimated useful life of the asset.

Right-of-use assets are also subject to impairment should the estimated useful life be assessed as less than the remaining lease term.

2.6

Impairment of fixed assets

At each reporting period end date, the company reviews the carrying amounts of its tangible assets to determine whether there is any indication that those assets have suffered an impairment loss. If any such indication exists, the recoverable amount of the asset is estimated in order to determine the extent of the impairment loss (if any). Where it is not possible to estimate the recoverable amount of an individual asset, the company estimates the recoverable amount of the cash-generating unit to which the asset belongs.

Recoverable amount is the higher of fair value less costs to sell and value in use. In assessing value in use, the estimated future cash flows are discounted to their present value using a pre-tax discount rate that reflects current market assessments of the time value of money and the risks specific to the asset for which the estimates of future cash flows have not been adjusted.

If the recoverable amount of an asset (or cash-generating unit) is estimated to be less than its carrying amount, the carrying amount of the asset (or cash-generating unit) is reduced to its recoverable amount. An impairment loss is recognised immediately in profit or loss, unless the relevant asset is carried at a revalued amount, in which case the impairment loss is treated as a revaluation decrease.

Recognised impairment losses are reversed if, and only if, the reasons for the impairment loss have cease to apply. Where an impairment loss subsequently reverses, the carrying amount of the asset (or cash generating unit) is increased to the revised estimate of its recoverable amount, but so that the increased carrying amount does not exceed the carrying amount that would have been determined had no impairment loss been recognised for the asset (or cash-generating unit) in prior years. A reversal of an impairment loss is recognised immediately in profit or loss, unless the relevant asset is carried at a revalued amount, in which case the reversal of the impairment loss is treated as a revaluation increase.

2.7

Cash at bank

Cash at bank are basic financial assets and include deposits held at call with banks.

-13-

MONGODB UK LIMITED

NOTES TO THE FINANCIAL STATEMENTS (CONTINUED) FOR THE YEAR ENDED 31 JANUARY 2026

Accounting policies

(Continued)

2.8

Financial instruments

The company has elected to apply the provisions of Section 11 ‘Basic Financial Instruments' and Section 12 ‘Other Financial Instruments Issues' of FRS 102 to all of its financial instruments.

Financial instruments are recognised in the company's balance sheet when the company becomes party to the contractual provisions of the instrument.

Financial assets and liabilities are offset, with the net amounts presented in the financial statements, when there is a legally enforceable right to set off the recognised amounts and there is an intention to settle on a net basis or to realize the asset and settle the liability simultaneously.

Basic financial assets

Basic financial assets, which include debtors and cash at bank balances, are initially measured at transaction price including transaction costs and are subsequently carried at amortised cost using the effective interest method unless the arrangement constitutes a financing transaction, where the transaction is measured at the present value of the future receipts discounted at a market rate of interest. Financial assets classified as receivable within one year are not amortised.

Impairment of financial assets

Financial assets, other than those held at fair value through profit or loss, are assessed for indicators of impairment at each reporting end date.

Financial assets are impaired where there is objective evidence that, as a result of one or more events that occurred after the initial recognition of the financial asset, the estimated future cash flows have been affected. If an asset is impaired, the impairment loss is the difference between the carrying amount and the present value of the estimated cash flows discounted at the asset's original effective interest rate. The impairment loss is recognised in the profit or loss.

For financial assets measured at amortised cost, the impairment loss is measured as the difference between an asset's carrying amount and the present value of estimated cash flows discounted at the asset's original effective interest rate. If a financial asset has a variable interest rate, the discount rate for measuring any impairment loss is the current effective interest rate determined under the contract.

If there is a decrease in the impairment loss arising from an event occurring after the impairment was recognised, the impairment is reversed. The reversal is such that the current carrying amount does not exceed what the carrying amount would have been, had the impairment not previously been recognised. The impairment reversal is recognised in the profit or loss.

Derecognition of financial assets

Financial assets are derecognised only when the contractual rights to the cash flows from the asset expire or are settled, or when the company transfers the financial asset and substantially all the risks and rewards of ownership to another entity, or if some significant risks and rewards of ownership are retained but control of the asset has transferred to another party that is able to sell the asset in its entirety to an unrelated third party.

Classification of financial liabilities

Financial liabilities and equity instruments are classified according to the substance of the contractual arrangements entered into. An equity instrument is any contract that evidences a residual interest in the assets of the company after deducting all of its liabilities.

Basic financial liabilities

Basic financial liabilities, including creditors, are initially recognised at transaction price unless the arrangement constitutes a financing transaction, where the debt instrument is measured at the present value of the future payments discounted at a market rate of interest. Financial liabilities classified as payable within one year are not amortised.

Trade creditors are obligations to pay for goods or services that have been acquired in the ordinary course of business from suppliers. Amounts payable are classified as current liabilities if payment is due within one year or less. If not, they are presented as non-current liabilities. Trade creditors are recognised initially at transaction price and subsequently measured at amortised cost using the effective interest method.

Derecognition of financial liabilities

Financial liabilities are derecognised when the company's contractual obligations expire or are discharged or cancelled.

2.9

Called-up share capital

Called-up share capital is classified as equity under called-up share capital, incremental costs directly attributable to the issues of new ordinary shares or options are shown in equity as deduction, net of tax, from the proceeds.

-14-

MONGODB UK LIMITED

NOTES TO THE FINANCIAL STATEMENTS (CONTINUED) FOR THE YEAR ENDED 31 JANUARY 2026

Accounting policies

(Continued)

2.10

Taxation

The tax expense represents the sum of the tax currently payable and deferred tax.

Current tax

The tax currently payable is based on taxable profit for the year. Taxable profit differs from net profit as reported in the profit and loss account because it excludes items of income or expense that are taxable or deductible in other years and it further excludes items that are never taxable or deductible. The company's liability for current tax is calculated using tax rates that have been enacted or substantively enacted by the reporting end date.

Deferred tax

Deferred tax liabilities are generally recognised for all timing differences and deferred tax assets are recognised to the extent that it is probable that they will be recovered against the reversal of deferred tax liabilities or other future taxable profits.

The carrying amount of deferred tax assets is reviewed at each reporting end date and reduced to the extent that it is no longer probable that sufficient taxable profits will be available to allow all or part of the asset to be recovered. Deferred tax is calculated at the tax rates that are expected to apply in the period when the liability is settled or the asset is realised. Deferred tax is charged or credited in the profit and loss account, except when it relates to items charged or credited directly to equity, in which case the deferred tax is also dealt with in equity. Deferred tax assets and liabilities are offset when the company has a legally enforceable right to offset current tax assets and liabilities and the deferred tax assets and liabilities relate to taxes levied by the same tax authority. Deferred tax is determined using tax rates and laws that have been enacted or substantively enacted by the reporting date.

2.11

Employee benefits

The costs of short-term employee benefits are recognised as a liability and an expense in the period in which the service is received. The cost of any unused holiday entitlement is recognised in the period in which the employee's services are received.

Termination benefits are recognised immediately as an expense when the company is demonstrably committed to terminate the employment of an employee or to provide termination benefits.

2.12

Retirement benefits

Payments to defined contribution benefit schemes are charged as an expense as they fall due. The assets of the plan are held separately from the company in independently administered funds.

2.13

Share-based payments

Equity-settled share-based payments relate to RSU are measured at fair value at the date of grant by reference to the fair value of the equity instruments granted using prevailing stock price of MongoDB Inc.

The Company operates an Employee Share Purchase Plan (ESPP) under which eligible employees may contribute, normally through payroll deductions, up to 15% of their earnings for the purchase of MongoDB Inc.'s Class A common stock at a discounted price. The fair value of the purchase rights granted under the ESPP is estimated on the first day of the offering period using the Black-Scholes option-pricing model. The share purchases occur twice a year at six-month intervals.

The share-based payment expense is recognised and measured on the basis of a reasonable allocation of the expense recognised for the group. The expense allocation is calculated on a straight line basis over the vesting period of the awards.

When the terms and conditions of equity-settled share-based payments at the time they were granted are subsequently modified, the fair value of the share-based payment under the original terms and conditions and under the modified terms and conditions are both determined at the date of the modification. Any excess of the modified fair value over the original fair value is recognised over the remaining vesting period in addition to the grant date fair value of the original share-based payment. The share-based payment expense is not adjusted if the modified fair value is less than the original fair value.

Cancellations or settlements (including those resulting from employee redundancies) are treated as an acceleration of vesting and the amount that would have been recognised over the remaining vesting period is recognised immediately.

-15-

MONGODB UK LIMITED

NOTES TO THE FINANCIAL STATEMENTS (CONTINUED) FOR THE YEAR ENDED 31 JANUARY 2026

Accounting policies

(Continued)

2.14

Leases

Under FRS 102, the Company assesses at contract inception whether a contract is, or contains, a lease. That is, if the contract conveys the right to control the use of an identified asset for a period of time in exchange for consideration.

The Company applies a single recognition and measurement approach for all leases, except for short-term leases and leases of low-value assets. The Company recognises lease liabilities to make lease payments and right-of-use assets representing the right to use the underlying assets.

Lease liabilities

At the commencement date of the lease, the Company recognises lease liabilities measured at the present value of lease payments to be made over the lease term. The lease payments include fixed payments (including in-substance fixed payments) less any lease incentives receivable, variable lease payments that depend on an index or a rate, and amounts expected to be paid under residual value guarantees. The lease payments also include the exercise price of a purchase option reasonably certain to be exercised by the Company and payments of penalties for terminating the lease, if the lease term reflects the Company exercising the option to terminate. Variable lease payments that do not depend on an index or a rate are recognised as expenses in the period in which the event or condition that triggers the payment occurs.

In calculating the present value of lease payments, the Company uses its incremental borrowing rate at the lease commencement date because the interest rate implicit in the lease is not readily determinable. After the commencement date, the amount of lease liabilities is increased to reflect the accretion of interest and reduced for the lease payments made. In addition, the carrying amount of lease liabilities is remeasured if there is a modification, a change in the lease term, a change in the lease payments (e.g. changes to future payments resulting from a change in an index or rate used to determine such lease payments) or a change in the assessment of an option to purchase the underlying asset.

Short-term leases and leases of low-value assets

The Company applies the short-term lease recognition exemption to its short-term leases (i.e. those leases that have a lease term of 12 months or less from the commencement date and do not contain a purchase option). It also applies the lease of low-value assets recognition exemption to leases of office equipment that are considered to be low value.

Lease payments on short-term leases and leases of low-value assets are recognised as expense on a straight-line basis over the lease term.

2.15

Foreign exchange

Transactions in currencies other than pounds sterling are recorded at the rates of exchange prevailing at the dates of the transactions. At each reporting end date, monetary assets and liabilities that are denominated in foreign currencies are retranslated at the rates prevailing on the reporting end date. Gains and losses arising on translation in the period are included in profit or loss.

Transactions in currencies other than the functional currency (foreign currency) are initially recorded at the exchange rate prevailing on the date of the transaction.

Monetary assets and liabilities denominated in foreign currencies are translated at the rate of exchange ruling at the reporting date. Non-monetary assets and liabilities denominated in foreign currencies are translated at the rate ruling at the date of the transaction, or, if the asset or liability is measured at fair value, the rate when that fair value was determined.

All translation differences are taken to profit or loss, except to the extent that they relate to gains or losses on non-monetary items recognised in other comprehensive income, when the related translation gain or loss is also recognised in other comprehensive income.

Assets and liabilities of foreign branches are translated into the Company's presentation currency at the rate ruling at the reporting date. Income and expenses of the foreign operation are translated at the average rate for the year as the directors consider this to be a reasonable approximation to the rate at the date of the transaction. Translation differences are recognised in other comprehensive income and accumulated in equity.

2.16

Related Party Transactions

The company discloses transactions with related parties which are not wholly owned with the same group. It does not disclose transactions with its parent or with members of the same group that are wholly owned.

2.17

Provisions

Provisions are made where an event has taken place that gives the company a legal or constructive obligation that probably requires settlement by a transfer of economic benefit, and a reliable estimate can be made of the amount of the obligation.

Provisions are charged to profit or loss in the year that the company becomes aware of the obligation and are measured at the best estimate at the balance sheet date of the expenditure required to settle the obligation, considering relevant risks and uncertainties.

-16-

MONGODB UK LIMITED

NOTES TO THE FINANCIAL STATEMENTS (CONTINUED) FOR THE YEAR ENDED 31 JANUARY 2026

Judgement and key sources of estimation uncertainty

In the application of the company's accounting policies, the directors are required to make judgements, estimates and assumptions about the carrying amount of assets and liabilities that are not readily apparent from other sources. The estimates and associated assumptions are based on historical experience and other factors that are considered to be relevant. Actual results may differ from these estimates.

The estimates and underlying assumptions are reviewed on an ongoing basis. Revisions to accounting estimates are recognised in the period in which the estimate is revised where the revision affects only that period, or in the period of the revision and future periods where the revision affects both current and future periods.

Key sources of estimation uncertainty

The estimates and assumptions which have a significant risk of causing a material adjustment to the carrying amount of assets and liabilities are as follows.

Debtors

The Company assess intercompany debtors held for any indicators of impairment on an annual basis. Judgement is exercised over valuation of each intercompany debtors based on the net asset position of the counter party and any other known factors.

Lease liabilities

The Company applies judgement in determining the incremental borrowing rate used to discount lease liabilities. The incremental borrowing rate reflects the rate that the Company would have to pay to borrow over a similar term and with similar security to obtain an asset of equivalent value in a similar economic environment. Factors considered include the Company's credit risk profile, lease term and underlying asset characteristics.

Deferred tax assets

A deferred tax asset has been recognised in respect of tax losses carried forward where management considers recovery to be probable. The assessment of recoverability involves significant estimation regarding the level and timing of future taxable profits.

Management's assessment was based on taxable profit forecasts covering the next three financial years. These forecasts were derived from current year taxable profit results and management's expectation that the Company will continue to generate sufficient taxable profits to utilise the recognised losses. The deferred tax asset recognised is limited to the amount expected to be recoverable based on these forecasts.

Should future taxable profits be lower than forecast, the amount recoverable may be reduced and could result in a charge to profit or loss in future periods.

-17-

MONGODB UK LIMITED

NOTES TO THE FINANCIAL STATEMENTS (CONTINUED) FOR THE YEAR ENDED 31 JANUARY 2026

Revenue

Revenue analysed by class of business

2025

2026

Support services

80,963,760

77,262,295

80,963,760

Total

77,262,295

Revenue analysed by geographical market

2025

2026

80,963,760

Republic of Ireland

77,262,295

80,963,760

Total

77,262,295

Operating profit

Operating profit is stated after charging:

2026

2025

217,782

Foreign exchange loss

133,778

26,089

Auditor's remuneration

27,910

1,872

Loss on sale of fixed assets

709,563

Depreciation of owned tangible fixed assets

743,829

Depreciation of right-of-use assets

492,161

3,363,364

Research and development cost

3,962,093

1,122,115

Operating lease charges

Short-term/low-value exempt leases

434,358

Employees and directors

The average monthly number of persons (including directors) employed by the company during the year was:

2026

2025

(No. of Employees)

Management

General & Administration

Research & Development

157

160

Sales & Marketing

Services & Subscriptions

Total

265

250

Their aggregate remuneration comprised:

2026

2025

41,660,063

Wages and salaries

41,710,454

15,582,266

Share-based payment cost

12,584,538

6,731,436

Social security costs

7,390,029

1,327,705

Pension costs

1,449,067

65,301,470

Total

63,134,088

Directors' remuneration

No remuneration was paid to the directors in respect of qualifying services during the year (2025: £nil).

Interest receivable and similar income

2026

2025

Interest on bank deposits

5,831

17,125

Total

17,125

5,831

Interest payable and similar expenses

2026

2025

(14,628)

Finance cost – Asset Retirement Obligation

(16,171)

Lease liabilities

(144,261)

(14,628)

Total

(160,432)

-18-

MONGODB UK LIMITED

NOTES TO THE FINANCIAL STATEMENTS (CONTINUED) FOR THE YEAR ENDED 31 JANUARY 2026

9 Share-based payment transactions

During the year, the Company recognised total share-based payment expenses of £12,584,538 (2025: £15,582,266) which is related to equity-settled share-based payment transactions, which include expenses for both Restricted Stock Units (RSUs) and the Employee Share Purchase Plan (ESPP). At the year end, all RSU awards were granted over the common share capital of the Company's ultimate parent, MongoDB Inc. The charges to the profit and loss account have been translated at the exchange rate prevailing at the date of grant for each tranche. MongoDB UK Limited participates in a group share-based payment plan and recognises its share-based payment expense based on a reasonable allocation of the total expense recognised by the group. The expense is allocated and recognised on a straight-line basis over the respective vesting periods of the awards.

Group equity-settled share options

2008 Stock Incentive Plan and 2016 Equity Incentive Plan

MongoDB Inc ("Parent Company") adopted the 2008 Stock Incentive Plan (as amended, the "2008 Plan") and the 2016 Equity Incentive Plan, or the 2016 Plan, for the purpose of granting stock-based awards to employees, directors, and consultants, including stock options and other stock-based awards including restricted stock units. The Parent Company no longer grants any stock-based awards under the 2008 Plan and any shares underlying stock options cancelled under the 2008 Plan were transferred to the 2016 Plan. The exercise prices of the stock option grants must be not less than 100% of the fair value of the common stock on the grant date as determined by the Board of Directors. If, at the date of grant, the optionee owns more than 10% of the total combined voting power of all classes of outstanding stock, or a 10% stockholder, the exercise price must be at least 110% of the fair value of the common stock on the date of grant as determined by the Board of Directors. Options granted are exercisable over a maximum term of 10 years from the date of grant or five years from the date of grant for incentive stock options ("ISOs") granted to any 10% stockholder. Stock option awards generally vest over a period of four years with 25% vesting on the one year an anniversary of the award and the remainder vesting monthly over the next 36 months of the grantee's service to the Company. RSUs granted to existing employees generally vest quarterly over a period of four years; RSUs awards granted to new employees generally vest over a period of four years with 25% vesting on the one year anniversary of the award and the remainder vesting quarterly over the next 12 quarters, both subject to the grantee's continued service with the Company.

2017 Employee Stock Purchase Plan

In October 2017, the parent company's Board of Directors adopted and stockholders approved, the 2017 Employee Stock Purchase Plan (the “2017 ESPP”). Subject to any plan limitations, the 2017 ESPP allows eligible employees to contribute, normally through payroll deductions, up to 15% of their earnings for the purchase of the Parent Company's Class A common stock at a discounted price per share. Unless otherwise determined by the Board of Directors, the Parent Company's Class A common stock will be purchased for the accounts of employees in the ESPP at a price per share that is the lesser of:

(1)

85% of the fair market value of the Parent Company's Class A common stock on the first trading day of the offering period, or

(2)

85% of the fair market value of the Parent Company's Class A common stock on the last trading day of the offering period.

The unvested shares are subject to lapsing repurchase rights upon termination of employment. For early exercised stock options under the 2008 Plan, the repurchase price is at the original purchase price. For early exercised stock options under the 2016 Plan, the repurchase price is the lower of:

(1)

the then-current fair market value of the common stock on the date of repurchase, or

(2)

the original purchase price.

-19-

MONGODB UK LIMITED

NOTES TO THE FINANCIAL STATEMENTS (CONTINUED) FOR THE YEAR ENDED 31 JANUARY 2026

Taxation

2026

2025

Current tax:

Current tax on profits for the current period

117,549

28,454

Adjustments in respect of previous periods

(19,419)

139,376

Total tax charge

98,130

167,830

Deferred tax:

Origination and reversal of timing differences

(1,311,465)

Impact of change in tax rate.

Total deferred tax

(1,311,465)

Total tax (credit)/charge included in profit or loss

(1,213,335)

167,830

The actual (credit)/charge for the year can be reconciled to the expected charge for the year based on the profit or loss and standard rate of tax as follows:

2026

2025

Profit before taxation

2,664,620

2,756,382

Expected tax charge based on the standard rate of corporation tax in the UK of 25 % (2025: 25%)

666,155

689,095

Effects of:

43,701

124,691

Tax effect of expenses that are not deductible in determining taxable profit

Other permanent differences

199

Fixed assets differences

280,399

166,041

Foreign tax charge

98,130

167,830

Movement in deferred tax previously not recognised

(990,255)

(980,026)

Recognition of previously unrecognised deferred tax assets

(1,311,465)

Taxation charge for the year

(1,213,335)

167,830

At 31 January 2026, the Company recognised a deferred tax asset of £1.311 million in respect of carried forward tax losses and other deductible temporary differences where recovery is considered probable. In prior years, no deferred tax asset had been recognised as there was insufficient evidence that future taxable profits would be available against which the losses and temporary differences could be utilised. During the current year, following a reassessment of forecast taxable profits and the expected utilisation of losses, management concluded that recovery of a portion of these deferred tax assets is now probable and the recognition criteria are met.

The Company continues to have carried forward tax losses in excess of those recognised as a deferred tax asset. At 31 January 2026, these unrecognised amounts give rise to a potential deferred tax asset of £10.251 million. No deferred tax asset has been recognised in respect of these amounts as sufficient evidence of future recoverability is not currently available.

Factors that may affect future tax charges

The Company is within the scope of the OECD Pillar Two model Rules. The Pillar Two legislation was enacted in England the jurisdiction in which the Company is incorporated which came into effect from 1 January 2025. Pillar Two legislation was effective for our FY2026. Based on full year results we satisfy the Routine Profits Test and qualify for transitional safe harbor treatment. We expect no top-up tax in the UK due for FY2026.

2025

2026

Deferred tax

Tangible assets

162,445

Share based payments

(337,173)

Unused tax losses

(1,070,961)

Lease liabilities/ Right-of-use assets

(65,776)

(1,311,465)

Total provision

-20-

MONGODB UK LIMITED

NOTES TO THE FINANCIAL STATEMENTS (CONTINUED) FOR THE YEAR ENDED 31 JANUARY 2026

Tangible fixed assets

Leasehold

Fixtures and

Asset Retirement

Office Equipment

Leasehold

Total

Improvements

Fittings

Cost

Office space

Cost

At 1 February 2025

2,432,078

441,869

134,124

421,681

3,429,752

Additions

62,643

29,403

92,046

Transition adjustments

2,040,087

At 31 January 2026

2,494,721

441,869

134,124

451,084

2,040,087

5,561,885

Depreciation and Impairment

At 1 February 2025

560,879

112,736

32,523

177,673

883,811

Depreciation charged in the year

479,735

87,995

24,386

151,713

492,161

1,235,990

At 31 January 2026

1,040,614

200,731

56,909

329,386

492,161

2,119,801

Net book value

At 31 January 2026

1,454,107

241,138

77,215

121,698

1,547,926

3,442,084

At 31 January 2025

1,871,199

329,133

101,601

244,008

2,545,941

11.1 Right-of-use assets

Leasehold

Cost

Office space

At 1 February 2025

Additions

2,040,087

Transition adjustments

2,040,087

At 31 January 2026

Depreciation

At 1 February 2025

492,161

Charge for the year

492,161

At 31 January 2026

Net book value

1,547,926

At 31 January 2026

The total cash outflow for leases during the year was £ 637,483.

Refer note 5 for the expenses recognised during the year for short-term leases and variable lease payments not included in the measurement of lease liabilities.

Refer note 8 for the interest expense on lease liabilities.

-21-

MONGODB UK LIMITED

NOTES TO THE FINANCIAL STATEMENTS (CONTINUED) FOR THE YEAR ENDED 31 JANUARY 2026

12 Deferred tax assets

Deferred tax asset is limited to the amount expected to be recoverable based on the three-year forecasts of the reversal of temporary differences under the liability method, using a tax rate of 25% (2025: Nil).

2026

2025

The movement on the deferred tax assets is as shown below:

Opening balance

Recognised in profit and loss - Tax expense

1,311,465

Closing balance

1,311,465

13 Debtors

2026

2025

Amounts falling due within one year:

Amounts owed by group undertaking

9,878,725

9,232,866

VAT receivable

329,800

391,168

Corporation tax receivable

101,047

Prepayments and accrued income

934,822

317,879

Other debtors

35,388

44,349

Total

11,178,735

10,087,309

Amounts owed by group undertakings are unsecured, interest free, and have a credit period of 60 days.

14 Creditors: amounts falling due within one year

2026

2025

Trade creditors

242,127

Other taxation and social security

4,860,541

3,370,710

Other creditors

73,621

46,387

Lease Liabilities (Refer Note 20)

306,392

Corporation tax payable

70,047

Accruals

5,231,985

5,833,160

Total

10,542,586

9,492,384

15 Creditors: amounts falling due after more than one year

2026

2025

Lease Liabilities* (Refer Note 20)

1,504,638

*The Company has adopted the FRS 102 amendments during the year. The Company has applied the modified retrospective approach to the recognition of leases as explained in note 20. As a result, the comparatives for 2025 have not been restated. The carrying value of obligations under operating leases as at 31 January 2025 were transferred to lease liabilities on the date of initial application, which was 1 February 2025.

Provision for other liabilities

2026

2025

Asset Retirement Obligation

Opening balance

153,311

138,683

Additions

14,628

16,171

Interest

Closing balance

153,311

169,482

The provision reflects the present value of the Company's estimated future obligation to reinstate leased premises to their contractually required condition at the end of the lease term. It is measured initially at the discounted value of the expected reinstatement costs, with the corresponding amount capitalised within tangible fixed assets (note 11) and depreciated over the shorter of the useful economic life of the related improvement and the lease term. The provision is reviewed at each reporting date, and any change in the estimated timing or amount of the obligation is adjusted prospectively. The movement recognised in the year represents the unwinding of the discount, charged to finance costs (note 8); no new reinstatement obligations were identified during the current or prior year.

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MONGODB UK LIMITED

NOTES TO THE FINANCIAL STATEMENTS (CONTINUED) FOR THE YEAR ENDED 31 JANUARY 2026

Pension commitment

The company operates a defined contribution pension scheme for all qualifying employees. The assets of the scheme are held separately from those of the company in an independently administered fund.

The amount recognised as an expense for the defined contribution scheme was:

2026

2025

Charge to profit or loss in respect of defined contribution schemes

1,449,067

1,327,705

Total

1,449,067

1,327,705

Called-up share capital

2026

2025

Ordinary share capital Issued and fully paid

100 Ordinary shares of £1 each

100

Total

100

Reserves

Profit and loss reserves

Cumulative profit and loss net of distributions to owners.

Share-based payment reserve

The cumulative share-based payment expense adjusted for any share-based payment recharges from the ultimate parent.

Leases

The Company leases land and buildings for its office space. Leases include an option to renew the lease for an additional period after the end of the contract term. The Company is not reasonable certain to exercise the renewal option on the existing lease starting 05 May 2023 to 23 March 2029.

2026

Current

306,392

1,504,638

Non-current

1,811,030

Total lease liabilities

Maturity analysis of contractual undiscounted cash flows are as follows:

2026

Less than one year

432,433

1,620,101

More than one to five years

2,052,534

Total undiscounted lease liabilities as 31 January 2026

The following are the movements in lease liabilities:

2026

Opening Balance

Additions

2,304,252

Revaluation

Interest

144,261

(637,483)

Payments

1,811,030

Total Lease Liabilities

Related party transactions

The company has taken advantage of the exemption given in FRS 102 Section 33.1A. This exemption permits non-disclosure of transactions entered into between two or more members of a group, provided that any subsidiary which is a party to the transaction is wholly owned by such a member. The Company has not paid any remuneration to its directors.

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MONGODB UK LIMITED

NOTES TO THE FINANCIAL STATEMENTS (CONTINUED) FOR THE YEAR ENDED 31 JANUARY 2026

Ultimate controlling party

The directors consider the immediate parent undertaking to be MongoDB Limited, a company incorporated in the Republic of Ireland. The directors consider the ultimate parent undertaking to be MongoDB Inc. a company incorporated in the USA and having its principal executive office at 1633 Broadway, 38th Floor, New York, 10019. MongoDB Inc. is the smallest and largest group for which consolidated accounts including MongoDB UK Limited are prepared. The consolidated accounts of MongoDB Inc. are publicly available.

Early adoption of FRS 102 amendments

The Company has elected to early adopt the amendments to FRS 102 "The Financial Reporting Standard applicable in the UK and Republic of Ireland" under the periodic review 2026 in the current year financial statements.

The Company has elected to early adopt the revised Section 23 of FRS 102, Revenue from Contracts with Customers, as issued by the Financial Reporting Council (FRC) in its "The Financial Reporting Standard applicable in the UK and Republic of Ireland and other FRSs - Periodic Review 2024". The revised Section 23 introduces a five-step model for revenue recognition, aligned with IFRS 15, and applies to all contracts with customers, including intercompany arrangements where the counterparty receives goods or services in exchange for consideration. It is effective for accounting periods beginning on or after 1 January 2026. Early adoption is permitted provided all amendments from the review are adopted simultaneously.

Revenue is derived solely from service agreement with the Parent Company, whereby the Company recharges costs and expenses incurred at a fixed mark-up rate. Revenue is recognised during the period the Company satisfies its performance obligation by incurring the underlying costs.

The Company has adopted the revised requirements of Section 23 and updated its revenue recognition accounting policies accordingly. The adoption has not resulted in any material change to the timing, measurement or presentation of revenue recognised in the financial statements.

Accordingly, the accounting treatment for revenue remains unchanged, and no retrospective adjustments have been made for revenue. Therefore the key amendments relate to the accounting for operating leases.

Impact of lease adjustments

The Company implemented Leases changes effective from 1 February 2025 and used the modified retrospective approach to apply the new Section

20. In applying this approach, comparative information has not been restated, and retrospective cumulative effect of initial application is recognised as an adjustment to the opening balance of retained earnings.

Expected balance after early adoption of FRS 102 amendments

1 February 2025 as previously reported

Movement

Right of use asset

2,040,087

Lease liabilities

(2,304,252)

Impact on net assets

(264,165)

Recognised in retained earnings 31 January 2025

264,165

Events after the end of the reporting period

There have been no significant events affecting the Company since the year end.

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