STOCK TITAN

Gilead deal cashes out Arcellx (NASDAQ: ACLX) director options

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

Rhea-AI Filing Summary

Arcellx, Inc. director Olivia C. Ware reported the disposition to the issuer of four stock option grants totaling 65,450 options on Common Stock. The options had exercise prices of $63.68, $51.30, $37.94, and $7.61 per share and now show zero options remaining for each grant.

According to the merger agreement among Arcellx, Gilead Sciences, Inc., and Ravens Sub, Inc., these Company Options, each with a per share exercise price below the $115 Closing Amount, were canceled and converted into cash and contingent rights. For each option share, the holder became entitled to a lump-sum cash payment equal to $115 minus the applicable per share exercise price, multiplied by the number of shares, plus one contractual contingent value right per underlying share.

Positive

  • None.

Negative

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Insider Ware Olivia C
Role null
Type Security Shares Price Value
Disposition Stock Option (right to buy) 36,806 $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 --
Holdings After Transaction: Stock Option (right to buy) — 0 shares (Direct, null)
Footnotes (1)
  1. [object Object]
Total options canceled 65,450 options Director stock options converted at merger closing
Closing Amount $115 per share Reference price for merger option cash-out formula
Option exercise price $63.68 per share One canceled Company Option grant
Option exercise price $51.30 per share One canceled Company Option grant
Option exercise price $37.94 per share One canceled Company Option grant
Option exercise price $7.61 per share One canceled Company Option grant
Option expiration dates 2032-05-16 to 2035-05-29 Original expirations for canceled grants
Agreement and Plan of Merger regulatory
"Pursuant to the Agreement and Plan of Merger, dated February 22, 2026, by and among Arcellx, Inc., Gilead Sciences, Inc., and Ravens Sub, Inc."
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
"and (ii) one contractual contingent value right for each share subject to such Company Option immediately prior to the effective time of the Merger."
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.
per share exercise price financial
"Each outstanding Company stock option, which had a per share exercise price less than $115 per share, was canceled and converted into the right to receive consideration."
stock option (right to buy) financial
"security_title: Stock Option (right to buy)"
wholly owned subsidiary financial
"Ravens Sub, Inc., a wholly owned subsidiary of Parent, merged with and into Company."
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*
Ware Olivia C

(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
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)$7.6104/28/2026D36,806 (1)05/16/2032Common Stock36,806(1)0D
Stock Option (right to buy)$37.9404/28/2026D11,459 (1)06/14/2033Common Stock11,459(1)0D
Stock Option (right to buy)$51.304/28/2026D8,011 (1)05/28/2034Common Stock8,011(1)0D
Stock Option (right to buy)$63.6804/28/2026D9,174 (1)05/29/2035Common Stock9,174(1)0D
Explanation of Responses:
1. Pursuant to the Agreement and Plan of Merger, dated February 22, 2026, by and among Arcellx, Inc. ("Company"), Gilead Sciences, Inc. ("Parent"), and Ravens Sub, Inc., a wholly owned subsidiary of Parent ("Purchaser"), Purchaser merged with and into Company (the "Merger"), with Company surviving the Merger as a wholly owned subsidiary of Parent. Each outstanding Company stock option ("Company Option"), whether or not vested, and which had a per share exercise price less than $115 per share (the "Closing Amount"), was canceled and converted into the right to receive (i) a lump sum cash payment equal to (x) the excess 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 contractual contingent value right 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 insider transaction did Arcellx (ACLX) report for Olivia C. Ware?

Arcellx reported that director Olivia C. Ware disposed of four stock option grants totaling 65,450 options. The options were canceled in connection with a merger and converted into cash payments and contingent value rights based on a $115 per share Closing Amount.

Were Olivia C. Ware’s Arcellx (ACLX) options sold on the open market?

No, the options were not sold on the open market. They were canceled in a disposition to the issuer as part of a merger agreement, converting each option into a cash payment and one contingent value right per underlying share instead of market sales.

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

Each Arcellx stock option with a per share exercise price below $115 was canceled at closing. For each such option share, the holder received cash equal to $115 minus the exercise price, multiplied by the share count, plus one contractual contingent value right.

What is the $115 Closing Amount mentioned in the Arcellx (ACLX) Form 4?

The $115 Closing Amount is the per share reference price used in the merger consideration formula. For eligible Arcellx stock options, cash paid per underlying share equals the excess of this $115 Closing Amount over the option’s per share exercise price, plus one contingent value right.

What did Olivia C. Ware receive for her canceled Arcellx (ACLX) options?

For each underlying share in her canceled options, Olivia C. Ware became entitled to a cash payment equal to $115 minus the option’s exercise price. She also received one contractual contingent value right for each underlying share covered by those options.

Did Olivia C. Ware retain any of the reported Arcellx (ACLX) options after the merger?

No, for each of the four reported option grants, the post-transaction balance is zero. All 65,450 reported stock options were canceled and converted into the specified cash payments and contingent value rights under the merger terms.