STOCK TITAN

Arcellx (ACLX) director’s shares and options cashed out in Gilead deal

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Lubner David Charles reported disposition transactions in this Form 4 filing.

Arcellx director David Charles Lubner exited his position as part of the Gilead acquisition. He tendered 21,659 shares of Arcellx common stock into Gilead’s offer, receiving $115.00 per share in cash plus one contingent value right (CVR) promising a potential $5.00 cash payment per CVR.

In addition, all his outstanding stock options with exercise prices below $115.00 were canceled and converted into cash equal to the spread between $115.00 and each option’s exercise price, plus one CVR for each underlying share. Following these tender offer and option cancellation transactions, Lubner reported holding no Arcellx securities.

Positive

  • None.

Negative

  • None.
Insider Lubner David Charles
Role null
Type Security Shares Price Value
Disposition Stock Option (right to buy) 13,626 $0.00 --
Disposition Stock Option (right to buy) 59,405 $0.00 --
Disposition Stock Option (right to buy) 31,794 $0.00 --
Disposition Stock Option (right to buy) 61,538 $0.00 --
Disposition Stock Option (right to buy) 11,459 $0.00 --
Disposition Stock Option (right to buy) 8,011 $0.00 --
Disposition Stock Option (right to buy) 9,174 $0.00 --
U Common Stock 21,659 $0.00 --
Holdings After Transaction: Stock Option (right to buy) — 0 shares (Direct, null); Common Stock — 0 shares (Direct, null)
Footnotes (1)
  1. Pursuant to the Agreement and Plan of Merger, dated February 22, 2026 (the "Merger Agreement"), by and among Arcellx, Inc. ("Company"), Gilead Sciences, Inc. ("Parent"), and Ravens Sub, Inc., a wholly owned subsidiary of Parent ("Purchaser"), the shares of common stock of Company that were tendered to Purchaser prior to the expiration time of the offer were exchanged for (x) $115.00 per share ("Closing Amount"), net to the seller in cash, without interest, subject to withholding tax, plus (y) 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, pursuant to the terms and subject to the conditions of a contingent value rights agreement. After completion of the tender offer, pursuant to the terms of the Merger Agreement, Purchaser merged with and into Company (the "Merger"), with Company surviving the Merger as a wholly owned subsidiary of Parent. Pursuant to the Merger Agreement, each outstanding option to purchase shares of Common Stock (a "Company Option"), whether or not vested, and which had a per share exercise price that was less than the Closing Amount, was canceled and converted into the right of the holder to receive (i) (subject to any applicable withholding taxes) a lump-sum cash payment equal to (x) the excess (if any) of (a) the Closing Amount over (b) the per share exercise price subject to such Company Option, multiplied by (y) the total number of shares subject to such Company Option immediately prior to the effective time of the Merger, and (ii) one (1) CVR for each share subject to such Company Option immediately prior to the effective time of the Merger.
Common shares tendered 21,659 shares Common Stock tendered into Gilead offer
Cash consideration per share $115.00 per share Tendered Arcellx common stock consideration
Contingent value per CVR $5.00 per CVR Potential additional payment per CVR
Option tranche at $15.00 61,538 option shares Stock options with $15.00 exercise price disposed to issuer
Option tranche at $6.28 59,405 option shares Stock options with $6.28 exercise price disposed to issuer
Total dispose transactions 8 transactions 1 common stock tender, 7 option dispositions
Post-transaction holdings 0 shares / 0 options Director’s Arcellx holdings after tender and option cash-out
tender offer financial
"shares of common stock of Company that were tendered to Purchaser"
A tender offer is a proposal made by a person or company to buy shares from existing shareholders at a set price, usually higher than the current market value, within a specific time frame. It matters to investors because it can lead to a change in ownership or control of a company, and shareholders must decide whether to sell their shares at the offered price.
Agreement and Plan of Merger regulatory
"Pursuant to the Agreement and Plan of Merger, dated February 22, 2026"
An Agreement and Plan of Merger is a formal document where two companies agree to combine into one, outlining how the process will happen. It’s like a step-by-step plan for merging, and it matters because it shows both sides have agreed on the details before the official transition takes place.
contingent value right financial
"one contractual contingent value right (a "CVR"), which represents the right to receive one contingent payment of $5.00"
A contingent value right is a special security that gives its holder the right to receive one or more future payments only if specified events happen, such as a product reaching a sales target or getting regulatory approval. It matters to investors because it offers potential extra payout tied to uncertain outcomes—like a bet that a project will succeed—so it can add upside to a deal while also carrying extra risk and valuation uncertainty.
Company Option financial
"each outstanding option to purchase shares of Common Stock (a "Company Option"), whether or not vested"
cash payment financial
"a lump-sum cash payment equal to the excess (if any) of the Closing Amount over the per share exercise price"
wholly owned subsidiary financial
"Ravens Sub, Inc., a wholly owned subsidiary of Parent ("Purchaser")"
A wholly owned subsidiary is a company whose entire ownership is held by another company (the parent), so the parent controls decisions, operations, and finances. Think of it as a fully controlled branch that runs as its own legal entity but whose results flow straight into the parent’s financial statements; investors watch these structures because they affect consolidated revenue, risk exposure, and how profits, liabilities, and cash flow are allocated across the corporate group.
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
X
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Lubner David Charles

(Last)(First)(Middle)
C/O ARCELLX, INC.
800 BRIDGE PARKWAY

(Street)
REDWOOD CITY CALIFORNIA 94065

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Arcellx, Inc. [ ACLX ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
04/28/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock04/28/2026U21,659D(1)0D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option (right to buy)$6.8304/28/2026D13,626 (2)08/31/2030Common Stock13,626(2)0D
Stock Option (right to buy)$6.2804/28/2026D59,405 (2)06/09/2031Common Stock59,405(2)0D
Stock Option (right to buy)$6.6604/28/2026D31,794 (2)12/07/2031Common Stock31,794(2)0D
Stock Option (right to buy)$1504/28/2026D61,538 (2)02/03/2032Common Stock61,538(2)0D
Stock Option (right to buy)$37.9404/28/2026D11,459 (2)06/14/2033Common Stock11,459(2)0D
Stock Option (right to buy)$51.304/28/2026D8,011 (2)05/28/2034Common Stock8,011(2)0D
Stock Option (right to buy)$63.6804/28/2026D9,174 (2)05/29/2035Common Stock9,174(2)0D
Explanation of Responses:
1. Pursuant to the Agreement and Plan of Merger, dated February 22, 2026 (the "Merger Agreement"), by and among Arcellx, Inc. ("Company"), Gilead Sciences, Inc. ("Parent"), and Ravens Sub, Inc., a wholly owned subsidiary of Parent ("Purchaser"), the shares of common stock of Company that were tendered to Purchaser prior to the expiration time of the offer were exchanged for (x) $115.00 per share ("Closing Amount"), net to the seller in cash, without interest, subject to withholding tax, plus (y) 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, pursuant to the terms and subject to the conditions of a contingent value rights agreement. After completion of the tender offer, pursuant to the terms of the Merger Agreement, Purchaser merged with and into Company (the "Merger"), with Company surviving the Merger as a wholly owned subsidiary of Parent.
2. Pursuant to the Merger Agreement, each outstanding option to purchase shares of Common Stock (a "Company Option"), whether or not vested, and which had a per share exercise price that was less than the Closing Amount, was canceled and converted into the right of the holder to receive (i) (subject to any applicable withholding taxes) a lump-sum cash payment equal to (x) the excess (if any) of (a) the Closing Amount over (b) the per share exercise price subject to such Company Option, multiplied by (y) the total number of shares subject to such Company Option immediately prior to the effective time of the Merger, and (ii) one (1) CVR for each share subject to such Company Option immediately prior to the effective time of the Merger.
/s/ Michelle Gilson, as Attorney-in-Fact04/28/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What did Arcellx (ACLX) director David Charles Lubner report in this Form 4?

He reported disposing of his Arcellx holdings in connection with Gilead’s acquisition. 21,659 common shares were tendered, and all in-the-money stock options were canceled for cash plus contingent value rights.

How many Arcellx (ACLX) common shares did the director tender in the Gilead offer?

He tendered 21,659 Arcellx common shares into Gilead’s offer. Each share was exchanged for $115.00 in cash plus one contingent value right, reflecting the agreed merger consideration structure.

What consideration did Arcellx (ACLX) shareholders receive in the Gilead tender offer?

Each tendered Arcellx share was exchanged for $115.00 in cash plus one contingent value right (CVR). Each CVR entitles the holder to a potential additional $5.00 cash payment, subject to conditions in the CVR agreement.

How were Arcellx (ACLX) stock options treated in the Gilead merger?

Each in-the-money Arcellx stock option was canceled and converted into cash equal to the difference between $115.00 and its exercise price times the option shares, plus one contingent value right for each underlying share.

Does the Arcellx (ACLX) director still hold any shares or options after the merger?

According to the Form 4, the director reported zero common shares and zero stock options following the transactions. This indicates his Arcellx equity position was fully settled through the tender offer and option cash-out.

What is a contingent value right (CVR) in the Arcellx (ACLX) and Gilead deal?

A CVR is a contractual right to receive an extra payment if specified conditions are met. In this merger, each CVR can pay an additional $5.00 in cash per CVR under terms described in the contingent value rights agreement.