TapewireFind a company

person · Reporting owner

Gilson Michelle

Disclosed activity across 2 companies

Tapewire entity
26521
SEC CIK
0001930862

Export transaction history ↓

Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Rani Therapeutics Holdings, Inc.RANI · Entity 6642DirectorAugust 03, 2026August 05, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

Rani Therapeutics Holdings, Inc.

Report date August 03, 2026 · Filed August 05, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Director Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $0.80 · Expires 2036-08-02Direct247,200 Reported balance After 2026-08-03 transaction · row 1 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 1 · 2026-08-03 · Grant · Acquired 247,200 · Balance 247,200

F1: The shares subject to the option will vest and become exercisable over a three-year period, with 1/3rd of shares vesting on the first anniversary of the grant date and 1/36th of the shares vesting in equal monthly installments thereafter, such that the option is fully vested on the third anniversary of the date of grant, subject to the Reporting Person's Continuous Service (as defined in the Company's 2021 Equity Incentive Plan (the "2021 Plan")) through such vesting date, and will vest in full upon a Change in Control (as defined in the 2021 Plan), subject to the Reporting Person's Continuous Service through such date.

Filing footnotes · ownership attribution and instrument terms

F1: The shares subject to the option will vest and become exercisable over a three-year period, with 1/3rd of shares vesting on the first anniversary of the grant date and 1/36th of the shares vesting in equal monthly installments thereafter, such that the option is fully vested on the third anniversary of the date of grant, subject to the Reporting Person's Continuous Service (as defined in the Company's 2021 Equity Incentive Plan (the "2021 Plan")) through such vesting date, and will vest in full upon a Change in Control (as defined in the 2021 Plan), subject to the Reporting Person's Continuous Service through such date.

Past disclosures · reporting ended (1)

No longer tracked through insider filings. These historical balances do not imply present ownership or a zero position.

Arcellx, Inc.

Report date April 28, 2026 · Filed April 28, 2026

Section 16 reporting ended · disclosed 2026-04-28. Current position is not established by this disclosure.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect0 Reported balance After 2026-04-28 transaction · row 1
1 source row

Row 1 · 2026-04-28 · Other · Disposed 67,048 · Balance 0

F1: 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.

Common StockSEC Table I · non-derivativeIndirectBy foundation0 Reported balance After 2026-04-28 transaction · row 2 Account identity is unresolved; indirect or unspecified ownership is not merged.
1 source row

Row 2 · 2026-04-28 · Other · Disposed 5,000 · Balance 0

F1: 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.

F2: Shares held by a a family charitable foundation, of which the Reporting Person serves as the President. The Reporting Person has voting and investment power over all securities owned by the foundation.

Stock Option (right to buy)SEC Table II · derivative / convertible security · Conversion / exercise price $8.66 · Expires 2032-05-23Direct0 Reported balance After 2026-04-28 transaction · row 3 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 3 · 2026-04-28 · Disposition to issuer · Disposed 40,205 · Balance 0

F3: 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.

Stock Option (right to buy)SEC Table II · derivative / convertible security · Conversion / exercise price $19.97 · Expires 2032-09-28Direct0 Reported balance After 2026-04-28 transaction · row 4 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 4 · 2026-04-28 · Disposition to issuer · Disposed 32,500 · Balance 0

F3: 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.

Stock Option (right to buy)SEC Table II · derivative / convertible security · Conversion / exercise price $31.03 · Expires 2033-01-03Direct0 Reported balance After 2026-04-28 transaction · row 5 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 5 · 2026-04-28 · Disposition to issuer · Disposed 70,796 · Balance 0

F3: 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.

Stock Option (right to buy)SEC Table II · derivative / convertible security · Conversion / exercise price $56.15 · Expires 2034-01-02Direct0 Reported balance After 2026-04-28 transaction · row 6 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 6 · 2026-04-28 · Disposition to issuer · Disposed 94,596 · Balance 0

F3: 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.

Restricted Stock UnitSEC Table II · derivative / convertible securityDirect0 Reported balance After 2026-04-28 transaction · row 7 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 7 · 2026-04-28 · Disposition to issuer · Disposed 20,496 · Balance 0

F4: Each restricted stock unit represents a contingent right to receive one share of Company Common Stock.

F5: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

Restricted Stock UnitSEC Table II · derivative / convertible securityDirect0 Reported balance After 2026-04-28 transaction · row 8 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 8 · 2026-04-28 · Disposition to issuer · Disposed 61,590 · Balance 0

F4: Each restricted stock unit represents a contingent right to receive one share of Company Common Stock.

F5: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

Restricted Stock UnitSEC Table II · derivative / convertible securityDirect0 Reported balance After 2026-04-28 transaction · row 9 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 9 · 2026-04-28 · Disposition to issuer · Disposed 88,542 · Balance 0

F4: Each restricted stock unit represents a contingent right to receive one share of Company Common Stock.

F5: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

Performance-based Restricted Stock UnitSEC Table II · derivative / convertible securityDirect59,028 Reported balance After 2026-04-28 transaction · row 10 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 10 · 2026-04-28 · Grant · Acquired 59,028 · Balance 59,028

F4: Each restricted stock unit represents a contingent right to receive one share of Company Common Stock.

F5: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

Performance-based Restricted Stock UnitSEC Table II · derivative / convertible securityDirect0 Reported balance After 2026-04-28 transaction · row 11 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 11 · 2026-04-28 · Disposition to issuer · Disposed 59,028 · Balance 0

F4: Each restricted stock unit represents a contingent right to receive one share of Company Common Stock.

F5: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

Filing footnotes · ownership attribution and instrument terms

F1: 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.

F2: Shares held by a a family charitable foundation, of which the Reporting Person serves as the President. The Reporting Person has voting and investment power over all securities owned by the foundation.

F3: 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.

F4: Each restricted stock unit represents a contingent right to receive one share of Company Common Stock.

F5: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

Transaction history

JSON API
Reset

Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
August 03, 2026 Filed Aug 5, 2026 00:51 UTC Rani Therapeutics Holdings, Inc. RANI · Entity 6642 GrantDirector Stock Option (Right to Buy) · Derivative 247,200 $0.00 Strike: $0.80 $0.00
Disclosure

SEC source: 0001930862-26-000011 · form4-08052026_120851.xml · derivative · entry 1

Gilson Michelle · CIK 0001930862 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 247,200

Underlying: Class A Common Stock · 247,200 shares

Expires 2036-08-02

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable over a three-year period, with 1/3rd of shares vesting on the first anniversary of the grant date and 1/36th of the shares vesting in equal monthly installments thereafter, such that the option is fully vested on the third anniversary of the date of grant, subject to the Reporting Person's Continuous Service (as defined in the Company's 2021 Equity Incentive Plan (the "2021 Plan")) through such vesting date, and will vest in full upon a Change in Control (as defined in the 2021 Plan), subject to the Reporting Person's Continuous Service through such date.

Read SEC document
April 28, 2026 Filed Apr 28, 2026 20:25 UTC Arcellx, Inc. ACLX · Entity 15294 Disposition to issuerPerformance-based Restricted Stock Unit · Derivative 59,028 Not disclosed Not disclosed
Disclosure

SEC source: 0001930862-26-000008 · form4-04282026_080443.xml · derivative · entry 11

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 59,028 shares

Expires not disclosed

F4 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Company Common Stock.

F5 · price: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

F5 · derivative.exercise_date: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

F5 · derivative.expiration_date: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

Read SEC document
April 28, 2026 Filed Apr 28, 2026 20:25 UTC Arcellx, Inc. ACLX · Entity 15294 GrantPerformance-based Restricted Stock Unit · Derivative 59,028 Not disclosed Not disclosed
Disclosure

SEC source: 0001930862-26-000008 · form4-04282026_080443.xml · derivative · entry 10

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 59,028

Underlying: Common Stock · 59,028 shares

Expires not disclosed

F4 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Company Common Stock.

F5 · price: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

F5 · derivative.exercise_date: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

F5 · derivative.expiration_date: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

Read SEC document
April 28, 2026 Filed Apr 28, 2026 20:25 UTC Arcellx, Inc. ACLX · Entity 15294 Disposition to issuerRestricted Stock Unit · Derivative 88,542 Not disclosed Not disclosed
Disclosure

SEC source: 0001930862-26-000008 · form4-04282026_080443.xml · derivative · entry 9

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 88,542 shares

Expires not disclosed

F4 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Company Common Stock.

F5 · price: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

F5 · derivative.exercise_date: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

F5 · derivative.expiration_date: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

Read SEC document
April 28, 2026 Filed Apr 28, 2026 20:25 UTC Arcellx, Inc. ACLX · Entity 15294 Disposition to issuerRestricted Stock Unit · Derivative 61,590 Not disclosed Not disclosed
Disclosure

SEC source: 0001930862-26-000008 · form4-04282026_080443.xml · derivative · entry 8

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 61,590 shares

Expires not disclosed

F4 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Company Common Stock.

F5 · price: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

F5 · derivative.exercise_date: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

F5 · derivative.expiration_date: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

Read SEC document
April 28, 2026 Filed Apr 28, 2026 20:25 UTC Arcellx, Inc. ACLX · Entity 15294 Disposition to issuerRestricted Stock Unit · Derivative 20,496 Not disclosed Not disclosed
Disclosure

SEC source: 0001930862-26-000008 · form4-04282026_080443.xml · derivative · entry 7

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 20,496 shares

Expires not disclosed

F4 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Company Common Stock.

F5 · price: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

F5 · derivative.exercise_date: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

F5 · derivative.expiration_date: Pursuant to the Merger Agreement, each outstanding restricted stock unit (a "Company RSU"), whether or not vested, 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 Closing Amount, multiplied by (y) the total number of shares subject to such Company RSU immediately prior to the effective time of the Merger (with the number of shares underlying any Company RSUs that were subject to performance-based vesting conditions determined based on achievement of actual performance in connection with the Merger, as determined by the Company's board of directors or a committee thereof), and (ii) one (1) CVR for each share subject to such Company RSU immediately prior to the effective time of the Merger.

Read SEC document
April 28, 2026 Filed Apr 28, 2026 20:25 UTC Arcellx, Inc. ACLX · Entity 15294 Disposition to issuerStock Option (right to buy) · Derivative 94,596 Not disclosed Strike: $56.15 Not disclosed
Disclosure

SEC source: 0001930862-26-000008 · form4-04282026_080443.xml · derivative · entry 6

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 94,596 shares

Expires 2034-01-02

F3 · price: 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.

F3 · derivative.exercise_date: 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.

Read SEC document
April 28, 2026 Filed Apr 28, 2026 20:25 UTC Arcellx, Inc. ACLX · Entity 15294 Disposition to issuerStock Option (right to buy) · Derivative 70,796 Not disclosed Strike: $31.03 Not disclosed
Disclosure

SEC source: 0001930862-26-000008 · form4-04282026_080443.xml · derivative · entry 5

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 70,796 shares

Expires 2033-01-03

F3 · price: 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.

F3 · derivative.exercise_date: 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.

Read SEC document
April 28, 2026 Filed Apr 28, 2026 20:25 UTC Arcellx, Inc. ACLX · Entity 15294 Disposition to issuerStock Option (right to buy) · Derivative 32,500 Not disclosed Strike: $19.97 Not disclosed
Disclosure

SEC source: 0001930862-26-000008 · form4-04282026_080443.xml · derivative · entry 4

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 32,500 shares

Expires 2032-09-28

F3 · price: 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.

F3 · derivative.exercise_date: 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.

Read SEC document
April 28, 2026 Filed Apr 28, 2026 20:25 UTC Arcellx, Inc. ACLX · Entity 15294 Disposition to issuerStock Option (right to buy) · Derivative 40,205 Not disclosed Strike: $8.66 Not disclosed
Disclosure

SEC source: 0001930862-26-000008 · form4-04282026_080443.xml · derivative · entry 3

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 40,205 shares

Expires 2032-05-23

F3 · price: 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.

F3 · derivative.exercise_date: 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.

Read SEC document
April 28, 2026 Filed Apr 28, 2026 20:25 UTC Arcellx, Inc. ACLX · Entity 15294 OtherCommon Stock 5,000 Not disclosed Not disclosed
Disclosure

SEC source: 0001930862-26-000008 · form4-04282026_080443.xml · nonDerivative · entry 2

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Indirect · By foundation

Disclosed balance after: 0

F1 · price: 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.

F2 · ownership.nature: Shares held by a a family charitable foundation, of which the Reporting Person serves as the President. The Reporting Person has voting and investment power over all securities owned by the foundation.

Read SEC document
April 28, 2026 Filed Apr 28, 2026 20:25 UTC Arcellx, Inc. ACLX · Entity 15294 OtherCommon Stock 67,048 Not disclosed Not disclosed
Disclosure

SEC source: 0001930862-26-000008 · form4-04282026_080443.xml · nonDerivative · entry 1

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · price: 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.

Read SEC document
April 16, 2026 Filed Apr 17, 2026 21:00 UTC Arcellx, Inc. ACLX · Entity 15294 Exercise / conversionStock Option (right to buy) · Derivative 2,110 $0.00 Strike: $8.66 $0.00
Disclosure

SEC source: 0001193125-26-161748 · ownership.xml · derivative · entry 5

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,205

Underlying: Common Stock · 2,110 shares

Expires 2032-05-23

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: Shares issued pursuant to the Issuer's 2022 Equity Incentive Plan (the "2022 Plan"). Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, twenty-five percent (25%) of the shares subject to the Option shall vest on the one (1) year anniversary of the Vesting Commencement Date, and one forty-eighth (1/48th) of the shares subject to the Option shall vest each month thereafter on the same day of the month as the Vesting Commencement Date (and if there is no corresponding day, on the last day of the month), "Vesting Commencement Date" shall mean May 23, 2022.

Read SEC document
April 16, 2026 Filed Apr 17, 2026 21:00 UTC Arcellx, Inc. ACLX · Entity 15294 Exercise / conversionCommon Stock 2,110 $8.66 $18,272.60
Disclosure

SEC source: 0001193125-26-161748 · ownership.xml · nonDerivative · entry 2

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 67,048

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
April 15, 2026 Filed Apr 17, 2026 21:00 UTC Arcellx, Inc. ACLX · Entity 15294 Exercise / conversionStock Option (right to buy) · Derivative 36,000 $0.00 Strike: $8.66 $0.00
Disclosure

SEC source: 0001193125-26-161748 · ownership.xml · derivative · entry 4

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,315

Underlying: Common Stock · 36,000 shares

Expires 2032-05-23

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: Shares issued pursuant to the Issuer's 2022 Equity Incentive Plan (the "2022 Plan"). Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, twenty-five percent (25%) of the shares subject to the Option shall vest on the one (1) year anniversary of the Vesting Commencement Date, and one forty-eighth (1/48th) of the shares subject to the Option shall vest each month thereafter on the same day of the month as the Vesting Commencement Date (and if there is no corresponding day, on the last day of the month), "Vesting Commencement Date" shall mean May 23, 2022.

Read SEC document
April 15, 2026 Filed Apr 17, 2026 21:00 UTC Arcellx, Inc. ACLX · Entity 15294 Exercise / conversionCommon Stock 36,000 $8.66 $311,760.00
Disclosure

SEC source: 0001193125-26-161748 · ownership.xml · nonDerivative · entry 1

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,938

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
March 17, 2026 Filed Mar 19, 2026 22:26 UTC Arcellx, Inc. ACLX · Entity 15294 GiftCommon Stock 5,000 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-116340 · ownership.xml · nonDerivative · entry 1

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,938

F1 · ownership.direct: On March 17, 2026, the Reporting Person transferred, for no consideration, 5,000 shares to a family charitable foundation of which the Reporting Person serves as the President. The Reporting Person has voting and investment power over all securities owned by the foundation.

Read SEC document
February 25, 2026 Filed Feb 26, 2026 00:51 UTC Arcellx, Inc. ACLX · Entity 15294 SaleCommon Stock 11,219 $113.82 $1,276,954.43
Disclosure

SEC source: 0001193125-26-072579 · ownership.xml · nonDerivative · entry 2

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,938

F2 · kind: Represents a broker-assisted sale to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units.

F3 · price: Represents the weighted average share price of an aggregate total of 11,219 shares sold in the price range of $113.765 to $113.835 by the Reporting Person. The Reporting Person undertakes to provide upon request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
February 19, 2026 Filed Feb 19, 2026 23:26 UTC Arcellx, Inc. ACLX · Entity 15294 SaleCommon Stock 100 $69.38 $6,938.00
Disclosure

SEC source: 0001193125-26-059840 · ownership.xml · nonDerivative · entry 4

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,157

F2 · kind: Represents a broker-assisted sale to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units.

Read SEC document
February 19, 2026 Filed Feb 19, 2026 23:26 UTC Arcellx, Inc. ACLX · Entity 15294 SaleCommon Stock 5,405 $68.57 $370,634.90
Disclosure

SEC source: 0001193125-26-059840 · ownership.xml · nonDerivative · entry 3

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,257

F2 · kind: Represents a broker-assisted sale to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units.

F4 · price: Represents the weighted average share price of an aggregate total of 5,405 shares sold in the price range of $68.17 to $69.04 by the Reporting Person. The Reporting Person undertakes to provide upon request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
February 19, 2026 Filed Feb 19, 2026 23:26 UTC Arcellx, Inc. ACLX · Entity 15294 SaleCommon Stock 2,879 $67.73 $194,994.96
Disclosure

SEC source: 0001193125-26-059840 · ownership.xml · nonDerivative · entry 2

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,662

F2 · kind: Represents a broker-assisted sale to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units.

F3 · price: Represents the weighted average share price of an aggregate total of 2,879 shares sold in the price range of $67.09 to $68.08 by the Reporting Person. The Reporting Person undertakes to provide upon request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
February 17, 2026 Filed Feb 18, 2026 22:19 UTC Arcellx, Inc. ACLX · Entity 15294 SaleCommon Stock 4,150 $70.01 $290,551.88
Disclosure

SEC source: 0001193125-26-057469 · ownership.xml · nonDerivative · entry 3

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 53,541

F2 · kind: Represents a broker-assisted sale to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units.

F4 · price: Represents the weighted average share price of an aggregate total of 4,150 shares sold in the price range of $69.69 to $70.55 by the Reporting Person. The Reporting Person undertakes to provide upon request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
February 17, 2026 Filed Feb 18, 2026 22:19 UTC Arcellx, Inc. ACLX · Entity 15294 SaleCommon Stock 7,141 $69.21 $494,230.75
Disclosure

SEC source: 0001193125-26-057469 · ownership.xml · nonDerivative · entry 2

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 57,691

F2 · kind: Represents a broker-assisted sale to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units.

F3 · price: Represents the weighted average share price of an aggregate total of 7,141 shares sold in the price range of $68.69 to $69.68 by the Reporting Person. The Reporting Person undertakes to provide upon request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
January 06, 2026 Filed Jan 7, 2026 01:14 UTC Arcellx, Inc. ACLX · Entity 15294 Exercise / conversionRestricted Stock Unit · Derivative 20,530 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-005085 · ownership.xml · derivative · entry 7

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61,590

Underlying: Common Stock · 20,530 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

F5 · derivative.exercise_date: Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, one-fourth (1/4th) of the RSUs subject to the award will vest each year following the RSU Grant Date on the same day of the month as the RSU Grant Date (or, if there is no corresponding day in a particular month, then the last day of the month) over four (4) years. "RSU Grant Date" shall mean January 6, 2025.

F5 · derivative.expiration_date: Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, one-fourth (1/4th) of the RSUs subject to the award will vest each year following the RSU Grant Date on the same day of the month as the RSU Grant Date (or, if there is no corresponding day in a particular month, then the last day of the month) over four (4) years. "RSU Grant Date" shall mean January 6, 2025.

Read SEC document
January 06, 2026 Filed Jan 7, 2026 01:14 UTC Arcellx, Inc. ACLX · Entity 15294 Exercise / conversionCommon Stock 20,530 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-005085 · ownership.xml · nonDerivative · entry 3

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,832

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
January 06, 2026 Filed Feb 26, 2026 00:51 UTC Arcellx, Inc. ACLX · Entity 15294 Exercise / conversionCommon Stock 20,530 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-072579 · ownership.xml · nonDerivative · entry 1

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,832

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock. Vesting of these RSUs previously reported in the Form 4 filed January 6, 2026.

Read SEC document
January 03, 2026 Filed Jan 7, 2026 01:14 UTC Arcellx, Inc. ACLX · Entity 15294 Exercise / conversionRestricted Stock Unit · Derivative 15,340 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-005085 · ownership.xml · derivative · entry 6

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 15,340 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

F4 · derivative.exercise_date: Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, one-third (1/3rd) of the RSUs subject to the award will vest each year following the RSU Grant Date on the same day of the month as the RSU Grant Date (or, if there is no corresponding day in a particular month, then the last day of the month) over three (3) years. "RSU Grant Date" shall mean January 3, 2023.

F4 · derivative.expiration_date: Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, one-third (1/3rd) of the RSUs subject to the award will vest each year following the RSU Grant Date on the same day of the month as the RSU Grant Date (or, if there is no corresponding day in a particular month, then the last day of the month) over three (3) years. "RSU Grant Date" shall mean January 3, 2023.

Read SEC document
January 03, 2026 Filed Jan 7, 2026 01:14 UTC Arcellx, Inc. ACLX · Entity 15294 Exercise / conversionCommon Stock 15,340 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-005085 · ownership.xml · nonDerivative · entry 2

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,302

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
January 03, 2026 Filed Feb 19, 2026 23:26 UTC Arcellx, Inc. ACLX · Entity 15294 Exercise / conversionCommon Stock 15,340 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-059840 · ownership.xml · nonDerivative · entry 1

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,302

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock. Vesting of these RSUs previously reported in the Form 4 filed January 3, 2026.

Read SEC document
January 02, 2026 Filed Jan 7, 2026 01:14 UTC Arcellx, Inc. ACLX · Entity 15294 Exercise / conversionRestricted Stock Unit · Derivative 20,496 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-005085 · ownership.xml · derivative · entry 5

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,496

Underlying: Common Stock · 20,496 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

F3 · derivative.exercise_date: Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, one-third (1/3rd) of the RSUs subject to the award will vest each year following the RSU Grant Date on the same day of the month as the RSU Grant Date (or, if there is no corresponding day in a particular month, then the last day of the month) over three (3) years. "RSU Grant Date" shall mean January 2, 2024.

F3 · derivative.expiration_date: Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, one-third (1/3rd) of the RSUs subject to the award will vest each year following the RSU Grant Date on the same day of the month as the RSU Grant Date (or, if there is no corresponding day in a particular month, then the last day of the month) over three (3) years. "RSU Grant Date" shall mean January 2, 2024.

Read SEC document
January 02, 2026 Filed Jan 7, 2026 01:14 UTC Arcellx, Inc. ACLX · Entity 15294 GrantRestricted Stock Unit · Derivative 88,542 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-005085 · ownership.xml · derivative · entry 4

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 88,542

Underlying: Common Stock · 88,542 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

F2 · derivative.exercise_date: Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, one-fourth (1/4th) of the RSUs subject to the award will vest each year following the RSU Grant Date on the same day of the month as the RSU Grant Date (or, if there is no corresponding day in a particular month, then the last day of the month) over four (4) years. "RSU Grant Date" shall mean January 2, 2026.

F2 · derivative.expiration_date: Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, one-fourth (1/4th) of the RSUs subject to the award will vest each year following the RSU Grant Date on the same day of the month as the RSU Grant Date (or, if there is no corresponding day in a particular month, then the last day of the month) over four (4) years. "RSU Grant Date" shall mean January 2, 2026.

Read SEC document
January 02, 2026 Filed Jan 7, 2026 01:14 UTC Arcellx, Inc. ACLX · Entity 15294 Exercise / conversionCommon Stock 20,496 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-005085 · ownership.xml · nonDerivative · entry 1

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,962

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
January 02, 2026 Filed Feb 18, 2026 22:19 UTC Arcellx, Inc. ACLX · Entity 15294 Exercise / conversionCommon Stock 20,496 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-057469 · ownership.xml · nonDerivative · entry 1

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,962

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock. Vesting of these RSUs previously reported in the Form 4 filed January 2, 2026.

Read SEC document
October 15, 2025 Filed Oct 15, 2025 23:28 UTC Arcellx, Inc. ACLX · Entity 15294 SaleCommon Stock 5,364 $91.04 $488,315.49
Disclosure

SEC source: 0001193125-25-240536 · ownership.xml · nonDerivative · entry 1

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 8,466

F1 · kind: The sale of shares reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan entered into by the Reporting Person on March 21, 2025.

F2 · price: Represents the weighted average share price of an aggregate total of 5,364 shares sold in the price range of $90.99 to $91.19 by the Reporting Person. The Reporting Person undertakes to provide upon request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
October 06, 2025 Filed Oct 6, 2025 23:21 UTC Arcellx, Inc. ACLX · Entity 15294 SaleCommon Stock 1,064 $86.22 $91,733.29
Disclosure

SEC source: 0001193125-25-232216 · ownership.xml · nonDerivative · entry 2

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 13,830

F1 · kind: The sale of shares reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan entered into by the Reporting Person on March 21, 2025.

F3 · price: Represents the weighted average share price of an aggregate total of 1,064 shares sold in the price range of $86.05 to $86.435 by the Reporting Person. The Reporting Person undertakes to provide upon request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
October 03, 2025 Filed Oct 6, 2025 23:21 UTC Arcellx, Inc. ACLX · Entity 15294 SaleCommon Stock 4,882 $86.00 $419,869.58
Disclosure

SEC source: 0001193125-25-232216 · ownership.xml · nonDerivative · entry 1

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 14,894

F1 · kind: The sale of shares reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan entered into by the Reporting Person on March 21, 2025.

F2 · price: Represents the weighted average share price of an aggregate total of 4,882 shares sold in the price range of $85.99 to $86.20 by the Reporting Person. The Reporting Person undertakes to provide upon request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
May 27, 2025 Filed May 29, 2025 00:18 UTC Arcellx, Inc. ACLX · Entity 15294 SaleCommon Stock 8,449 $64.38 $543,908.60
Disclosure

SEC source: 0000950170-25-078529 · ownership.xml · nonDerivative · entry 3

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,776

F2 · kind: Represents the number of shares sold to cover the tax withholding obligations in connection with the vesting of RSUs and does not represent a discretionary sale by the Reporting Person.

F4 · price: Represents the weighted average share price of an aggregate total of 8,449 shares sold in the price range of $63.925 to $ 64.785 by the Reporting Person. The Reporting Person undertakes to provide upon request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
May 27, 2025 Filed May 29, 2025 00:18 UTC Arcellx, Inc. ACLX · Entity 15294 SaleCommon Stock 3,786 $63.62 $240,867.97
Disclosure

SEC source: 0000950170-25-078529 · ownership.xml · nonDerivative · entry 2

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,225

F2 · kind: Represents the number of shares sold to cover the tax withholding obligations in connection with the vesting of RSUs and does not represent a discretionary sale by the Reporting Person.

F3 · price: Represents the weighted average share price of an aggregate total of 3,786 shares sold in the price range of $62.935 to $63.925 by the Reporting Person. The Reporting Person undertakes to provide upon request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
May 23, 2025 Filed May 29, 2025 00:18 UTC Arcellx, Inc. ACLX · Entity 15294 Exercise / conversionRestricted Stock Units · Derivative 22,429 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-078529 · ownership.xml · derivative · entry 4

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 22,429 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

F5 · derivative.exercise_date: Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, the RSUs shall vest annually over three (3) years with a cliff every twelve (12) months on the same day of the month as the Vesting Commencement Date (and if there is no corresponding day, on the last day of the month). "Vesting Commencement Date" shall mean May 23, 2022.

F5 · derivative.expiration_date: Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, the RSUs shall vest annually over three (3) years with a cliff every twelve (12) months on the same day of the month as the Vesting Commencement Date (and if there is no corresponding day, on the last day of the month). "Vesting Commencement Date" shall mean May 23, 2022.

Read SEC document
May 23, 2025 Filed May 29, 2025 00:18 UTC Arcellx, Inc. ACLX · Entity 15294 Exercise / conversionCommon Stock 22,429 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-078529 · ownership.xml · nonDerivative · entry 1

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,011

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Read SEC document
January 08, 2025 Filed Jan 11, 2025 02:36 UTC Arcellx, Inc. ACLX · Entity 15294 SaleCommon Stock 3,997 $73.69 $294,550.52
Disclosure

SEC source: 0001415889-25-001345 · form4-01112025_020131.xml · nonDerivative · entry 7

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,582

F7 · kind: Represents a broker-assisted sale to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units.

F8 · price: The price reported reflects the weighted average sales price. These shares were sold in multiple transactions at prices that were not available from the broker at the time of filing. The Reporting Person undertakes to provide to the SEC staff, the issuer, or a security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price.

Read SEC document
January 07, 2025 Filed Jan 11, 2025 02:36 UTC Arcellx, Inc. ACLX · Entity 15294 SaleCommon Stock 4,760 $75.53 $359,514.71
Disclosure

SEC source: 0001415889-25-001345 · form4-01112025_020131.xml · nonDerivative · entry 6

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 13,579

F7 · kind: Represents a broker-assisted sale to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units.

F8 · price: The price reported reflects the weighted average sales price. These shares were sold in multiple transactions at prices that were not available from the broker at the time of filing. The Reporting Person undertakes to provide to the SEC staff, the issuer, or a security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price.

Read SEC document
January 07, 2025 Filed Jan 11, 2025 02:36 UTC Arcellx, Inc. ACLX · Entity 15294 SaleCommon Stock 2,327 $77.06 $179,319.78
Disclosure

SEC source: 0001415889-25-001345 · form4-01112025_020131.xml · nonDerivative · entry 5

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 18,339

F2 · kind: The sale of shares reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan entered into by the Reporting Person on December 18, 2023 and subsequently modified March 27, 2024.

F6 · price: Represents the weighted average share price of an aggregate total of 2,327 shares sold in the price range of $76.93 to $77.16 by the Reporting Person. The Reporting Person undertakes to provide upon request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
January 07, 2025 Filed Jan 11, 2025 02:36 UTC Arcellx, Inc. ACLX · Entity 15294 SaleCommon Stock 2,251 $76.64 $172,521.59
Disclosure

SEC source: 0001415889-25-001345 · form4-01112025_020131.xml · nonDerivative · entry 4

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 20,666

F2 · kind: The sale of shares reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan entered into by the Reporting Person on December 18, 2023 and subsequently modified March 27, 2024.

F5 · price: Represents the weighted average share price of an aggregate total of 2,251 shares sold in the price range of $75.93 to $76.91 by the Reporting Person. The Reporting Person undertakes to provide upon request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
January 07, 2025 Filed Jan 11, 2025 02:36 UTC Arcellx, Inc. ACLX · Entity 15294 SaleCommon Stock 1,546 $75.23 $116,310.68
Disclosure

SEC source: 0001415889-25-001345 · form4-01112025_020131.xml · nonDerivative · entry 3

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 22,917

F2 · kind: The sale of shares reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan entered into by the Reporting Person on December 18, 2023 and subsequently modified March 27, 2024.

F4 · price: Represents the weighted average share price of an aggregate total of 1,546 shares sold in the price range of $74.85 to $75.73 by the Reporting Person. The Reporting Person undertakes to provide upon request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
January 07, 2025 Filed Jan 11, 2025 02:36 UTC Arcellx, Inc. ACLX · Entity 15294 SaleCommon Stock 3,128 $74.43 $232,807.03
Disclosure

SEC source: 0001415889-25-001345 · form4-01112025_020131.xml · nonDerivative · entry 2

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 24,463

F2 · kind: The sale of shares reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan entered into by the Reporting Person on December 18, 2023 and subsequently modified March 27, 2024.

F3 · price: Represents the weighted average share price of an aggregate total of 3,128 shares sold in the price range of $73.80 to $74.74 by the Reporting Person. The Reporting Person undertakes to provide upon request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
January 06, 2025 Filed Jan 7, 2025 02:54 UTC Arcellx, Inc. ACLX · Entity 15294 GrantRestricted Stock Unit · Derivative 82,120 $0.00 $0.00
Disclosure

SEC source: 0001415889-25-000952 · form4-01072025_020104.xml · derivative · entry 7

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 82,120

Underlying: Common Stock · 82,120 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

F6 · derivative.exercise_date: Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, one-fourth (1/4th) of the RSUs subject to the award will vest each year following the RSU Grant Date on the same day of the month as the RSU Grant Date (or, if there is no corresponding day in a particular month, then the last day of the month) over four (4) years. "RSU Grant Date" shall mean January 6, 2025.

F6 · derivative.expiration_date: Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, one-fourth (1/4th) of the RSUs subject to the award will vest each year following the RSU Grant Date on the same day of the month as the RSU Grant Date (or, if there is no corresponding day in a particular month, then the last day of the month) over four (4) years. "RSU Grant Date" shall mean January 6, 2025.

Read SEC document
January 06, 2025 Filed Jan 7, 2025 02:54 UTC Arcellx, Inc. ACLX · Entity 15294 SaleCommon Stock 5,102 $77.17 $393,705.01
Disclosure

SEC source: 0001415889-25-000952 · form4-01072025_020104.xml · nonDerivative · entry 4

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,230

F2 · kind: Represents a broker-assisted sale to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units.

F3 · price: The price reported reflects the weighted average sales price. These shares were sold in multiple transactions at prices that were not available from the broker at the time of filing. The Reporting Person undertakes to provide to the SEC staff, the issuer, or a security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price.

Read SEC document
January 06, 2025 Filed Jan 11, 2025 02:28 UTC Amendment Arcellx, Inc. ACLX · Entity 15294 SaleCommon Stock 5,621 $77.17 $433,754.58
Disclosure

SEC source: 0001415889-25-001341 · form4a-01112025_020153.xml · nonDerivative · entry 3

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,591

F2 · kind: Represents a broker-assisted sale to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units.

F3 · shares: Amendment filed to report the correct number of shares sold to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units reported in the Form 4 filed on January 6, 2025.

F4 · price: The price reported reflects the weighted average sales price. These shares were sold in multiple transactions at prices that were not available from the broker at the time of filing. The Reporting Person undertakes to provide to the SEC staff, the issuer, or a security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price.

Read SEC document
January 03, 2025 Filed Jan 7, 2025 02:54 UTC Arcellx, Inc. ACLX · Entity 15294 Exercise / conversionRestricted Stock Unit · Derivative 15,339 $0.00 $0.00
Disclosure

SEC source: 0001415889-25-000952 · form4-01072025_020104.xml · derivative · entry 6

Gilson Michelle · CIK 0001930862 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,340

Underlying: Common Stock · 15,339 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

F5 · derivative.exercise_date: Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, one-third (1/3rd) of the RSUs subject to the award will vest each year following the RSU Grant Date on the same day of the month as the RSU Grant Date (or, if there is no corresponding day in a particular month, then the last day of the month) over three (3) years. "RSU Grant Date" shall mean January 3, 2023.

F5 · derivative.expiration_date: Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, one-third (1/3rd) of the RSUs subject to the award will vest each year following the RSU Grant Date on the same day of the month as the RSU Grant Date (or, if there is no corresponding day in a particular month, then the last day of the month) over three (3) years. "RSU Grant Date" shall mean January 3, 2023.

Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.