UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or
15(d) of
The Securities Exchange
Act of 1934

DATE OF REPORT (DATE OF EARLIEST EVENT REPORTED): April 28, 2026

GILEAD SCIENCES, INC.

(Exact name of registrant as specified in its charter)

Delaware	0-19731	94-3047598
(State or other jurisdiction of incorporation)	(Commission File No.)	(IRS Employer  Identification No.)

333 Lakeside Drive, Foster City, California

(Address of principal executive offices)

94404

(Zip Code)

(650) 574-3000

(Registrant’s telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨      Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨      Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨     Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨      Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value, $0.001 per share	GILD	The Nasdaq Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

Emerging growth company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Item 7.01.

Regulation FD Disclosure.

On April 28, 2026, Gilead Sciences, Inc., a Delaware corporation (“Parent” or “Gilead”), issued a press release announcing the completion of the acquisition of the Arcellx, Inc., a Delaware corporation (the “Company”), a copy of which is attached as Exhibit 99.1 to this Current Report on Form 8-K and incorporated by reference herein.

The information in Item 7.01 and Item 9.01 of this Form 8-K and Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 8.01.

Other Events.

As previously disclosed, on February 22, 2026, Gilead entered into an Agreement and Plan of Merger (the “Merger Agreement”), among Parent, the Company and Ravens Sub, Inc., a Delaware corporation and a wholly-owned subsidiary of Parent (“Purchaser”). In accordance with the terms of the Merger Agreement, on April 28, 2026, Gilead completed the acquisition of the Company.

Pursuant to the Merger Agreement, and upon the terms and subject to the conditions thereof, on March 6, 2026, Purchaser commenced a tender offer (the “Offer”), to purchase all of the issued and outstanding shares (the “Shares”) of common stock, par value $0.001 per share, of the Company (other than any Shares owned immediately prior to the effective time of the Merger (as defined below) by the Company (including those held in the Company’s treasury), and any Shares owned both as of the date of the commencement of the Offer and immediately prior to the effective time of the Merger by Parent, Purchaser or any other direct or indirect wholly owned subsidiary of Parent, at a price per Share of (i) $115.00 per Share (the “Closing Amount”), net to the seller in cash, without interest, subject to any withholding tax, plus (ii) one contractual contingent value right (a “CVR”), which represents the right to receive one contingent payment of $5.00 per CVR, in cash, without interest, and subject to any withholding tax, payable on March 31, 2030, subject to cumulative worldwide Sales (as defined in the CVR Agreement (as defined below)) of the Company’s anitocabtagene autoleucel (anito-cel) product exceeding $6.0 billion on or prior to December 31, 2029 and the other terms and conditions set forth in a contingent value rights agreement (the “CVR Agreement”), entered into by and among Parent, Computershare, Inc., a Delaware corporation, and its affiliate, Computershare Trust Company, N.A., a federally chartered trust company.

The Offer expired at 5:00 p.m., Eastern Time, on April 27, 2026 (the ‘‘Expiration Time’’). According to Computershare Trust Company, N.A., the depositary and paying agent for the Offer, as of the Expiration Time, 38,795,604 Shares were validly tendered and not validly withdrawn in the Offer, representing, together with Shares already owned by Parent, approximately 77.2% of the outstanding Shares. The number of Shares tendered satisfied the condition to the Offer that there be validly tendered, and not validly withdrawn, in the Offer a number of Shares that, considered together with all other Shares owned by Purchaser and its affiliates (as such term is defined in Section 251(h)(6) of the General Corporation Law of the State of Delaware (the “DGCL”)), represent one more Share than 50% of the total number of Shares outstanding at the Expiration Time. All conditions to the Offer having been satisfied or waived, Gilead and Purchaser accepted for payment all Shares validly tendered and not validly withdrawn.

Following the consummation of the Offer, the remaining conditions to the Merger set forth in the Merger Agreement were satisfied or waived, and on April 28, 2026, Purchaser merged with and into the Company (the “Merger”) pursuant to Section 251(h) of the DGCL, with the Company continuing as the surviving corporation and a wholly owned subsidiary of Parent. Each Share outstanding immediately prior to the effective time of the Merger (other than (i) Shares owned immediately prior to the effective time of the Merger by the Company (including those held in the Company’s treasury), (ii) Shares owned both as of the commencement of the Offer and immediately prior to the effective time of the Merger by Parent, Purchaser, or any other direct or indirect wholly owned subsidiary of Parent, (iii) Shares irrevocably accepted for purchase pursuant to the Offer and (iv) Shares held by stockholders who are entitled to appraisal rights under Section 262 of the DGCL and have properly exercised and perfected their respective demands for appraisal of such Shares in the time and manner provided in Section 262 of the DGCL and, as of the effective time of the Merger, have neither effectively withdrawn nor lost their rights to such appraisal and payment under the DGCL) was converted into the right to receive, on a per Share basis, (i) the Closing Amount in cash, without any interest thereon, subject to any withholding tax, plus (ii) one CVR per Share.

The aggregate amount of funds used by Gilead to consummate the Offer and Merger (including payments for options, restricted stock units and other payments referred to in the Merger Agreement) was approximately $7.1 billion.

Item 9.01.

Financial Statements and Exhibits.

(d) Exhibits

The following Exhibit 99.1 is furnished pursuant to this Item 9.01.

Exhibit Number		Description
99.1		Press Release, dated April 28, 2026.

104		Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

GILEAD SCIENCES, INC.

By:	/s/ Andrew Dickinson
	Name:	Andrew Dickinson
	Title:	Chief Financial Officer

Dated: April 28, 2026

Exhibit 99.1

CONTACTS:

Ashleigh Koss, Media

[email protected]

Jacquie Ross, Investors

[email protected]

GILEAD SCIENCES COMPLETES ACQUISITION OF ARCELLX AHEAD OF POTENTIAL COMMERCIAL LAUNCH OF ANITO-CEL

FOSTER CITY, Calif., April 28, 2026 – Gilead Sciences, Inc. (Nasdaq: GILD) today announced the successful completion of its previously announced acquisition of Arcellx, Inc. (Nasdaq: ACLX). Under the terms of the transaction, Gilead acquired Arcellx for $115 per share in cash, plus one non-transferable contingent value right (CVR) of $5 per share, representing a total implied equity value of approximately $7.8 billion at the time of closing.

The acquisition builds on Kite, a Gilead Company, and Arcellx’s successful collaboration and provides Gilead with full control of anitocabtagene autoleucel (anito-cel), an investigational BCMA-directed CAR T-cell therapy for multiple myeloma. By consolidating ownership of anito-cel and eliminating future profit-share, milestone and royalty obligations, Gilead is positioned to accelerate development, streamline decision-making and maximize the long-term potential of the program.

“With the Arcellx acquisition, our focus turns to executing with speed and discipline as we prepare to bring anito-cel to patients,” said Cindy Perettie, Executive Vice President and Global Head of Kite. “I want to thank the Arcellx team for their scientific leadership, close collaboration to date and deep expertise they bring as we advance anito-cel. With this acquisition, anito-cel and the differentiated D-Domain BCMA binder will advance within Kite, combining this science with our global manufacturing, regulatory and commercial capabilities to unlock the full value of this potentially transformative therapy for people living with multiple myeloma.”

On April 28, 2026, Gilead successfully completed its tender offer for all outstanding shares of common stock of Arcellx and accepted for payment all shares validly tendered and not validly withdrawn as of the expiration time of the tender offer, which shares represented, together with shares already owned by Gilead, approximately 77.2% of Arcellx’s outstanding shares. Following completion of the offer, Gilead completed the acquisition of Arcellx through a merger of Gilead’s wholly owned subsidiary with and into Arcellx, in which shares of Arcellx common stock were cancelled and converted into the right to receive the same $115 per share in cash and one CVR of $5 per share as shares tendered in the offer.

The CVR is payable upon achievement of cumulative global net sales of anito-cel of at least $6.0 billion from launch through the end of 2029.

As a result of the completion of the merger, Arcellx has become a wholly owned subsidiary of Gilead and the common stock of Arcellx will be delisted from the Nasdaq Global Select Market.

This transaction is expected to be accounted for as an asset acquisition and reduce Gilead’s GAAP and non-GAAP 2026 diluted EPS by approximately $5.57 - $5.67. Excluding the impact of acquired in-process research and development expenses, Gilead expects the transaction to be modestly dilutive to earnings per share in 2026 and 2027, and accretive in 2028 and thereafter, subject to FDA approval of anito-cel.

About Anito-cel

Anitocabtagene autoleucel (anito-cel, previously ddBCMA) is the first BCMA-directed CAR T-cell therapy to be investigated in multiple myeloma that utilizes a novel and compact binder known as the D-Domain. The small, stable D-Domain binder enables high CAR expression without tonic signaling and is designed to quickly release from the BCMA target. This combination may allow for the effective elimination of multiple myeloma cells without severe immunotoxicity. Anito-cel has been granted Fast Track, Orphan Drug, and Regenerative Medicine Advanced Therapy Designations by the U.S. Food and Drug Administration.

About Gilead and Kite Oncology

Gilead and Kite Oncology are working to transform how cancer is treated. We are innovating with next-generation therapies, combinations and technologies to deliver improved outcomes for people with cancer. We are purposefully building our oncology portfolio and pipeline to address the greatest gaps in care. From antibody-drug conjugate technologies and small molecules to cell therapy-based approaches, we are creating new possibilities for people with cancer.

About Gilead Sciences

Gilead Sciences, Inc. is a biopharmaceutical company that has pursued and achieved breakthroughs in medicine for more than three decades, with the goal of creating a healthier world for all people. The company is committed to advancing innovative medicines to prevent and treat life-threatening diseases, including HIV, viral hepatitis, COVID-19, cancer and inflammation. In 2025, Gilead announced a planned $32 billion investment to further strengthen its U.S. footprint to power the next era of discovery, job creation and public health preparedness – while continuing to invest globally to ensure patients everywhere benefit from its scientific innovation. Gilead operates in more than 35 countries worldwide, with headquarters in Foster City, Calif.

Forward-Looking Statements

This communication contains forward-looking statements related to Gilead, Arcellx and the acquisition of Arcellx by Gilead that are subject to risks, uncertainties, and other factors. All statements other than statements of historical fact are statements that could be deemed forward-looking statements, including all statements regarding the intent, belief or current expectation of Gilead and Arcellx and members of their respective senior management teams. In some cases, forward-looking statements can be identified by the use of words such as “anticipate,” “believe,” “estimate,” “expect,” “intend,” “seek,” “may,” “plan,” “project,” “should,” “target,” “will,” or the negative of these terms or other similar expressions, although not all forward-looking statements contain these words. Forward-looking statements include, without limitation, statements regarding the transaction and related matters, prospective performance and opportunities, post-closing operations and the outlook for the companies’ businesses, including Gilead’s ability to apply its global manufacturing, regulatory and commercial capabilities and to accelerate the development of anito-cel; regulatory applications; the potential of Arcellx’s cell therapy platform; the impact of the transaction on Gilead’s diluted EPS; and any assumptions underlying any of the foregoing. Investors are cautioned that any such forward-looking statements are not guarantees of future performance and involve risks and uncertainties and are cautioned not to place undue reliance on these forward-looking statements. Actual results may differ materially from those currently anticipated due to a number of risks and uncertainties. Risks and uncertainties that could cause the actual results to differ from expectations contemplated by forward-looking statements include: the effects of the transaction on relationships with employees, other business partners or governmental entities; the difficulty of predicting the timing or outcome of regulatory approvals or actions, if any; the risk that the businesses will not be integrated successfully and that other anticipated benefits from the transaction will not be realized; the risk that the milestone associated with the CVR may not be achieved and that holders of CVRs may not receive payments in respect thereof; the impact of competitive products and pricing; other business effects, including the effects of industry, economic or political conditions outside of the companies’ control; transaction costs; actual or contingent liabilities; and other risks and uncertainties detailed from time to time in the companies’ periodic reports filed with the U.S. Securities and Exchange Commission (the “SEC”), including current reports on Form 8-K, quarterly reports on Form 10-Q and annual reports on Form 10-K, as well as the Schedule 14D-9 filed by Arcellx and the Schedule TO and related tender offer documents filed by Gilead and Ravens Sub, Inc., a wholly owned subsidiary of Gilead. All forward-looking statements are based on information currently available to Gilead, and Gilead assumes no obligation and disclaims any intent to update any such forward-looking statements.

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Gilead, Kite, Arcellx and the Gilead logo are trademarks of Gilead Sciences, Inc., or its related companies.

For more information about Gilead, please visit the company’s website at www.gilead.com, follow Gilead on X/Twitter (@Gilead Sciences) and LinkedIn (@Gilead-Sciences).