Noble Corp plc

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

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A Message from Charles M. Sledge, our Board Chair

Dear Fellow Shareholders,

On behalf of the entire Board of Directors (the “Board”) of Noble Corporation plc (the “Company” or “Noble”), we invite you to attend our 2026 Annual General Meeting on Wednesday, April 29, 2026. 2025 marked further exciting growth for the Company with the completed integration of Diamond Offshore Drilling, Inc. (“Diamond Offshore”) and a notably strong year of commercial wins enhancing our backlog and our industry leadership position. Through our comprehensive strategic fleet transformation – formed by landmark M&A transactions (Diamond 2024, Maersk Drilling 2022, Pacific Drilling 2021), as well as the prudent retirement of cold stacked equipment and disposal of non-core jackups – Noble has become a market leader in high specification deepwater and ultra-harsh environment rigs. To underscore the sweeping extent of this transformation, 24 of the 29 rigs (excluding two rigs held for sale) in our fleet today have come via strategic acquisitions since 2021.

While our strategic activities have been vigorous, the men and women of Noble have maintained uncompromising standards of HSE, operational excellence and financial performance. In the face of cyclical oil market headwinds and softening offshore drilling market conditions in 2025, Noble generated yearly growth in adjusted EBITDA and significant yearly improvement in free cash flow. Additionally, we achieved a highly differentiated 15% yearly increase in contract backlog during 2025 ($7.0 billion at 12/31/2025 vs. $6.1 billion at 12/31/2024) amid a backdrop of broader industry backlog decline. These achievements are a strong testament to the success of our First Choice Offshore efforts across the organization.

While overall contracting activity industry-wide remains relatively subdued compared to the recent record levels witnessed in 2022-2023, there are emerging signs of improving industry utilization at the outset of 2026. Over the medium to longer term, as the world continues to rely on offshore and deepwater hydrocarbon production as a critical energy source, we believe in a positive fundamental outlook for our industry and Noble’s strong competitive position.

Executing on our Strategy

Noble remains committed to our First Choice Offshore ambition for employees, customers and shareholders. Our intentional and selective fleet optimization strategy – driven by M&A and refined by non-core asset disposals – has formed a fleet of high specification deepwater and ultra-harsh environment offshore rigs which represents one of the most modern, capable, and highly utilized fleets in the industry.

Our customer and workforce strategy are founded upon Noble’s exceptional organizational strength and culture which have been enriched by the integration and onboarding of world class talent and best practices from our recent strategic combinations. We seek to empower and develop our highly talented and committed employees around the world to build meaningful careers and to align themselves with the success of Noble and our customers. We pursue and incentivize exacting standards for HSE, innovation and efficiency in order to manage our customers’ most technically challenging and high-risk operations with unwavering reliability. It is this reliability that ultimately drives our commercial success over the long run.

Our First Choice Offshore proposition for shareholders rests on a straightforward financial strategy: to maintain a sound balance sheet and maximize equity value by generating and returning free cash flow to shareholders via dividends and share repurchases. During calendar year 2025, Noble executed on this financial strategy by distributing $320 million in dividends (following $278 million in 2024) and returning an additional $20 million via share repurchases (following $300 million in 2024).

Board Composition is a Key Asset

Our Board reflects the diverse background and perspectives from the legacy Noble, Maersk Drilling and Diamond Offshore boardrooms, as further complemented and enhanced by the addition of the skillsets and experiences brought by the proposed addition of Erik Bergöö, a director nominee standing for election at the 2026 Annual General Meeting of the Company, and H. Keith Jennings, who joined in 2023. Our highly qualified directors are deeply engaged and committed to Noble’s success, with each director offering unique and critical expertise from a range of energy and external industrial and public sector settings. Importantly, the strategic planning and execution of our successive business integrations have been greatly enhanced by the collaborative efforts and leadership of this group. I am grateful to each of our directors for their invaluable contributions and ask for your support for all nominees on this year’s ballot.

A message from Charles M. Sledge, our Board Chair

Ongoing Commitment to Shareholder Engagement

Maintaining an active, open dialogue with our shareholders continues to be a top priority of the Board. Over the past year, in addition to investor conferences and non-deal roadshows, we have reached out to shareholders representing 61% of our outstanding shares as part of our seasonal shareholder outreach in order to solicit feedback on governance topics, Executive Compensation Program and our previous proxy statement, and members of our Board and management team had the pleasure of meeting with shareholders representing approximately 44% of our shares as part of this outreach initiative. These discussions have spanned a wide variety of topics, including capital allocation, governance, sustainability initiatives, our strategy for growth and long-term value creation and compensation matters such as selection of performance metrics. Shareholder concerns and advice on these and other topics are vital to our planning, and we remain committed to an open dialogue with shareholders in order to maximize value for the Company.

On behalf of the full Board, we thank you for your continued support and investment in the Company. We encourage you to vote for the proposals set forth in this proxy statement.

Sincerely,

Charles M. Sledge

Chairman of the Board of Directors

Notice of 2026 Annual General Meeting of Shareholders

To the shareholders of Noble Corporation plc:

Notice is hereby given that the 2026 annual general meeting of shareholders (the “Meeting”) of Noble Corporation plc, a public limited company incorporated under the laws of England and Wales (“Noble,” or the “Company”), will be held on Wednesday, April 29, 2026, at 11:30 a.m., Central Time, as a physical meeting atour offices, 2101 CityWest Boulevard, Suite 600, Houston, Texas 77042.

The items of business proposed by the Company’s board of directors (the “Board”) are to consider and, if thought fit, pass the resolutions below. Resolutions 1-14 will be proposed as ordinary resolutions and 15 will be proposed as a special resolution.

Resolutions

Organizational Matters

We will also consider any other business that may properly come before the Meeting and any adjournment or postponement of the Meeting. All of our shareholders of record at 5:00 p.m. Eastern Time on March 6, 2026 are entitled to notice of, and to give voting instructions in respect of, the Meeting.

Each shareholder of record that is entitled to attend and vote at the Meeting is entitled to appoint one or more proxies to attend, speak and vote at the Meeting instead of such shareholder. For shareholders of record, the record date in respect of entitlement to notice of, and to attend and vote at, the Meeting will be 5:00 p.m. Eastern Time on March 6, 2026. A proxy need not be a shareholder of the Company. On or about March 16, 2026, we plan to commence mailing a Notice of Internet Availability of Proxy Materials containing instructions on how to access our proxy statement and our 2025 Annual Report on Form 10-K (our “2025 10-K”) via the Internet and how to vote online. The Notice of Internet Availability of Proxy Materials also contains instructions on how you can receive a paper copy of the proxy materials. Our 2025 10-K, Notice of Internet Availability of Proxy Materials and proxy card are also first being made available online on or about March 16, 2026.

Resolutions 1 through 14 will be proposed during the Meeting as ordinary resolutions, which means that, assuming a quorum is present, each such resolution will be approved if a simple majority of votes cast (whether in person or by proxy), for or against a resolution, are cast in favor of the resolution. Resolution 15 will be proposed as a special resolution and requires the affirmative vote of at least 75% of the votes cast (whether in person or by proxy) at the Meeting on Resolution 15.

Please note that shareholders of record attending the Meeting in person are required to show proper identification on the day of the Meeting. Beneficial shareholders and individuals acting as a proxy will be required to show a valid written legal proxy signed by the shareholder of record granting you the required authority to attend the meeting and vote such shares. In order to determine attendance correctly, any shareholder or proxy leaving the Meeting early or temporarily is requested to present such information upon exit.

Attendance, Voting and Other Procedures for Holders of Shares Held Through Euronext

For the holders of shares held through Euronext, a description of the procedures for attending and voting at the Meeting, including voting by proxy and copies of the relevant forms to be completed, are available athttps://noblecorp.com/2026-Annual-General-Meeting. Please note that the procedures for the holders of shares held through Euronext are different to the procedures set out in this proxy statement for the holders of shares traded on the NYSE.

UK Annual Report and Accounts

During the Meeting, our Board will present our UK Annual Report, which includes our Statutory Accounts, the UK statutory Directors’ Report, the UK statutory Directors’ Remuneration Report, the UK statutory Directors’ Remuneration Policy, the UK statutory Strategic Report and the UK statutory Auditors’ Report for the year ended December 31, 2025. Our Board will also provide an opportunity for shareholders at the Meeting to raise questions in relation to the UK Annual Report. Copies of these materials are provided to all shareholders of record as well as our auditors, PricewaterhouseCoopers LLP, and may be obtained without charge by contacting Investor Relations at our offices located at 2101 CityWest Boulevard, Suite 600, Houston, Texas 77042 or online atwww.noblecorp.com.

YOUR VOTE IS IMPORTANT. All shareholders or their proxies are cordially invited to attend, speak, and vote at the Meeting. We urge you, whether or not you plan to attend the Meeting, to vote by submitting your proxy or voting instruction by telephone, via the internet, or by marking, signing and returning your proxy form or voting instruction card.

Our proxy materials are also available athttps://noblecorp.com/2026-Annual-General-meeting.

By Order of the Board of Directors

Jennie Howard

Corporate Secretary

Houston, Texas

March 16, 2026

(incorporated and registered in England and Wales under number 12958050)

Registered office: 3rd Floor 1 Ashley Road, Altrincham, Cheshire, WA14 2DT United Kingdom

Explanatory Note

As discussed in greater detail below, we have undertaken corporate actions and entered transactions that have affected our corporate structure. As a result, Noble is a successor issuer to Noble Cayman (as defined below), which is itself a successor issuer to Legacy Noble (as defined below). As used in this proxy statement, when discussing time periods including and after the Effective Date of the Business Combination (each as defined below), the terms “we,” “us,” “our,” and the “Company” refer to Noble and, as appropriate, its subsidiaries, the terms “Board” and “Compensation Committee” refer to the board of directors of Noble and the compensation committee of the board of directors of Noble, and the terms “share,” “shares,” or “shareholders” refer to Noble’s class A ordinary shares (“Ordinary Shares”) and shareholders.

When discussing time periods prior to the Effective Date of the Business Combination (each as defined below), the terms “we,” “us,” “our,” and the “Company” refer to Noble Cayman and, as appropriate, its subsidiaries, the terms “Board of Directors” and “Compensation Committee” refer to the board of directors of Noble Cayman and the compensation committee of the board of directors of Noble Cayman, and the terms “share,” “shares,” or “shareholders” refer to Noble Cayman’s ordinary shares and shareholders; provided that to the extent we discuss periods prior to February 5, 2021, the terms “we,” “us,” “our,” and the “Company” refer to Legacy Noble and, as appropriate, its subsidiaries, the terms “Board of Directors” and “compensation committee” refer to the board of directors of Legacy Noble and the compensation committee of the board of directors of Legacy Noble, and the terms “share,” “shares,” or “shareholders” refer to Legacy Noble’s ordinary shares and shareholders.

Emergence from bankruptcy in 2021. On July 31, 2020, our former parent company, Noble Holding Corporation plc (formerly known as Noble Corporation plc), a public limited company incorporated under the laws of England and Wales (“Legacy Noble”), and certain of its subsidiaries filed voluntary petitions in the United States Bankruptcy Court for the Southern District of Texas seeking relief under chapter 11 of title 11 of the United States Code. In connection with these chapter 11 proceedings, on and prior to the Emergence Date (as defined below), Legacy Noble and certain of its subsidiaries effected certain restructuring transactions pursuant to which Legacy Noble formed Noble Corporation, an exempted company incorporated in the Cayman Islands with limited liability (“Noble Cayman”), as an indirect wholly-owned subsidiary of Legacy Noble and transferred to Noble Cayman substantially all of the subsidiaries and other assets of Legacy Noble. On February 5, 2021 (the “Emergence Date”), Noble Cayman and its subsidiaries emerged from the chapter 11 proceedings, and Noble Cayman became the new parent company.

Business Combination with Maersk Drilling in 2022. On September 30, 2022 (the “Effective Date”), as a result of certain intercompany transactions relating to the Business Combination (as defined below), Noble became the ultimate parent of Noble Cayman and its respective subsidiaries, and the Ordinary Shares of Noble began trading on the New York Stock Exchange (the “NYSE”) under the symbol “NE.” On October 3, 2022 (the “Closing Date”), Noble completed a voluntary tender exchange offer to the shareholders of The Drilling Company of 1972 A/S, a Danish public limited liability company (“Maersk Drilling”) (the “Offer” and, together with other transactions, the “Business Combination”). Upon consummation of the Offer, because Noble had acquired more than 90% of the issued and outstanding shares of Maersk Drilling, Noble redeemed all remaining Maersk Drilling shares not exchanged in the Offer under Danish law by way of a compulsory purchase (the “Compulsory Purchase”). Upon completion of the Compulsory Purchase, Maersk Drilling became a wholly owned subsidiary of Noble.

Acquisition of Diamond Offshore Drilling in 2024. On June 9, 2024, Noble entered into an agreement and plan of merger (the “Diamond Merger Agreement”) with Diamond Offshore Drilling, Inc. (“Diamond”), Dolphin Merger Sub 1, Inc., and Dolphin Merger Sub 2, Inc., under which Noble would acquire Diamond in a stock plus cash transaction (the “Diamond Transaction”). On September 4, 2024, Noble completed its acquisition of Diamond. Pursuant to the terms and conditions set forth in the Diamond Merger Agreement, Diamond shareholders received 0.2316 shares of Noble, plus cash consideration of $5.65 per share for each share of Diamond.

Forward-Looking Statements

This Schedule 14A Information and proxy statement pursuant to Section 14(a) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), includes “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Exchange Act. All statements other than statements of historical facts included in this filing are forward looking statements. Forward-looking statements involve risks, uncertainties and assumptions, and actual results may differ materially from any future results expressed or implied by such forward-looking statements. When used in this filing, or in the documents incorporated by reference, the words “guidance,” “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “might,” “on track,” “plan,” “possible,” “potential,” “predict,” “project,” “should,” “would,” “achieve,” “shall,” “target,” “will,” and similar expressions are intended to be among the statements that identify forward-looking statements. Although we believe that the expectations reflected in such forward-looking statements are reasonable, we cannot assure you that such expectations will prove to be correct. Forward-looking and other statements in this proxy statement may also address our sustainability progress, plans, and goals (including environmental matters), and the inclusion of such statements is not an indication that these contents are necessarily material to the Company, investors or other stakeholders or required to be disclosed in our filings under the U.S. securities laws or any other laws or requirements applicable to the Company. In addition, historical, current, and forward-looking sustainability-related statements may be based on standards for measuring progress that are still developing, internal controls and processes that continue to evolve, and assumptions that are subject to change in the future. These forward-looking statements speak only as of the date of this filing and we undertake no obligation to revise or update any forward-looking statement for any reason, except as required by law. Risks, uncertainties and assumptions include, but are not limited to, those detailed in Noble’s most recent Annual Report on Form 10-K, Quarterly Reports on Form 10-Q and other filings with the U.S. Securities and Exchange Commission (the “SEC”). We cannot control such risk factors and other uncertainties, and, in many cases, we cannot predict the risks and uncertainties that could cause our actual results to differ materially from those indicated by the forward-looking statements. You should consider these risks and uncertainties when you are evaluating us. With respect to our capital allocation policy, distributions to shareholders in the form of either dividends or share buybacks are subject to the Board of Directors’ assessment of factors such as business development, growth strategy, current leverage, and financing needs. There can be no assurance that a dividend will be declared or continued.