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Nasdaq · USD

ATRA

Atara Biotherapeutics, Inc.

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Tapewire entity
6828
SEC CIK
0001604464
Parsed reports
491

Last 12 months

Inside the activity.

2 purchase rows · 18 sale rows

Disclosed non-derivative P/S rows, by transaction month. Includes amendments and private transactions.
Monthly counts
MonthPurchasesSales
Nov 202505
Dec 202500
Jan 202601
Feb 202600
Mar 202608
Apr 202600
May 202613
Jun 202600
Jul 202600
Aug 202601
Sep 202610
Oct 202600

Latest available

Insider transactions

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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 dateOwner / reported roleActivity / securityShares / unitsReported priceReported valueDetails
September 04, 2026 Filed Sep 4, 2026 22:20 UTC PurchaseCommon Stock 104,166 $9.60 $999,993.60
Disclosure

SEC source: 0000905148-26-004085 · form4.xml · nonDerivative · entry 1

Cherry Brian N · CIK 0001290922 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 166,486

F1 · shares: Represents shares purchased by the Reporting Person from the Issuer, through its sales agent, pursuant to that certain Sales Agreement, dated November 1, 2023, by and between the Issuer and TD Securities (USA) LLC.

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August 17, 2026 Filed Aug 26, 2026 23:45 UTC
Nguyen AnhCoDirector · President and CEO
SaleCommon Stock 5,062 $8.08 $40,882.74
Disclosure

SEC source: 0000905148-26-003960 · form4.xml · nonDerivative · entry 1

Nguyen AnhCo · CIK 0001977970 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 132,775

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on August 17, 2026, on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

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July 22, 2026 Filed Jul 25, 2026 01:00 UTC
Green JeremyDirector
Exercise / conversionPre-Funded Warrants to Purchase Common Stock · Derivative 55,387 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0001104659-26-086733 · tm2621190-2_4seq1.xml · derivative · entry 5

Redmile Group, LLC · CIK 0001425738 · Director

Green Jeremy · CIK 0001650527 · Director

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 55,387 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.

F3 · derivative.exercise_price: The Pre-Funded Warrants are exercisable at any time on or after the original issuance on December 11, 2020 until the seven-year anniversary of the original issuance date, at an exercise price equal to $0.0025 per share, subject to a 9.99% beneficial ownership blocker.

F8 · derivative.exercise_price: The previous report on Form 3 inadvertently indicated that all of the Pre-Funded Warrants beneficially owned by the Reporting Persons have an exercise price of $0.0001 per share and no expiration date. Footnotes (1), (2), (3), (6) and (7) and the related disclosures correct the Form 3 with respect to the terms of the Pre-Funded Warrants beneficially owned by the Reporting Persons.

F5 · kind: On July 22, 2026, the Reporting Persons exercised the reported Pre-Funded Warrants through a "cashless exercise" resulting in the Issuer withholding 60 shares of Common Stock to pay the exercise price and issuing the remaining 195,151 shares of Common Stock to the applicable Funds. The number of shares withheld to pay the aggregate exercise price for the cashless exercise of the Pre-Funded Warrants was based on the closing sale price per share of the Common Stock on the trading date immediately prior to the exercise date, per the terms of the Pre-Funded Warrants.

F3 · derivative.exercise_date: The Pre-Funded Warrants are exercisable at any time on or after the original issuance on December 11, 2020 until the seven-year anniversary of the original issuance date, at an exercise price equal to $0.0025 per share, subject to a 9.99% beneficial ownership blocker.

F8 · derivative.exercise_date: The previous report on Form 3 inadvertently indicated that all of the Pre-Funded Warrants beneficially owned by the Reporting Persons have an exercise price of $0.0001 per share and no expiration date. Footnotes (1), (2), (3), (6) and (7) and the related disclosures correct the Form 3 with respect to the terms of the Pre-Funded Warrants beneficially owned by the Reporting Persons.

F3 · derivative.expiration_date: The Pre-Funded Warrants are exercisable at any time on or after the original issuance on December 11, 2020 until the seven-year anniversary of the original issuance date, at an exercise price equal to $0.0025 per share, subject to a 9.99% beneficial ownership blocker.

F8 · derivative.expiration_date: The previous report on Form 3 inadvertently indicated that all of the Pre-Funded Warrants beneficially owned by the Reporting Persons have an exercise price of $0.0001 per share and no expiration date. Footnotes (1), (2), (3), (6) and (7) and the related disclosures correct the Form 3 with respect to the terms of the Pre-Funded Warrants beneficially owned by the Reporting Persons.

F4 · ownership.nature: The reported securities are directly owned by certain private funds managed by Redmile Group, LLC (collectively, the "Funds") and may be deemed beneficially owned by Redmile Group, LLC ("Redmile") as investment manager of the Funds. The reported securities may also be deemed beneficially owned by Jeremy Green as the principal of Redmile. Each of Redmile and Mr. Green (the "Reporting Persons") disclaims beneficial ownership of the reported securities except to the extent of their pecuniary interest therein, if any. This report shall not be deemed an admission that such Reporting Persons are the beneficial owners of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

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July 22, 2026 Filed Jul 25, 2026 01:00 UTC
Green JeremyDirector
Exercise / conversionPre-Funded Warrants to Purchase Common Stock · Derivative 38,735 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0001104659-26-086733 · tm2621190-2_4seq1.xml · derivative · entry 4

Redmile Group, LLC · CIK 0001425738 · Director

Green Jeremy · CIK 0001650527 · Director

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 38,735 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.

F2 · derivative.exercise_price: The Pre-Funded Warrants are exercisable at any time on or after the original issuance on May 29, 2020 until the seven-year anniversary of the original issuance date, at an exercise price equal to $0.0025 per share, subject to a 9.99% beneficial ownership blocker.

F8 · derivative.exercise_price: The previous report on Form 3 inadvertently indicated that all of the Pre-Funded Warrants beneficially owned by the Reporting Persons have an exercise price of $0.0001 per share and no expiration date. Footnotes (1), (2), (3), (6) and (7) and the related disclosures correct the Form 3 with respect to the terms of the Pre-Funded Warrants beneficially owned by the Reporting Persons.

F5 · kind: On July 22, 2026, the Reporting Persons exercised the reported Pre-Funded Warrants through a "cashless exercise" resulting in the Issuer withholding 60 shares of Common Stock to pay the exercise price and issuing the remaining 195,151 shares of Common Stock to the applicable Funds. The number of shares withheld to pay the aggregate exercise price for the cashless exercise of the Pre-Funded Warrants was based on the closing sale price per share of the Common Stock on the trading date immediately prior to the exercise date, per the terms of the Pre-Funded Warrants.

F2 · derivative.exercise_date: The Pre-Funded Warrants are exercisable at any time on or after the original issuance on May 29, 2020 until the seven-year anniversary of the original issuance date, at an exercise price equal to $0.0025 per share, subject to a 9.99% beneficial ownership blocker.

F8 · derivative.exercise_date: The previous report on Form 3 inadvertently indicated that all of the Pre-Funded Warrants beneficially owned by the Reporting Persons have an exercise price of $0.0001 per share and no expiration date. Footnotes (1), (2), (3), (6) and (7) and the related disclosures correct the Form 3 with respect to the terms of the Pre-Funded Warrants beneficially owned by the Reporting Persons.

F2 · derivative.expiration_date: The Pre-Funded Warrants are exercisable at any time on or after the original issuance on May 29, 2020 until the seven-year anniversary of the original issuance date, at an exercise price equal to $0.0025 per share, subject to a 9.99% beneficial ownership blocker.

F8 · derivative.expiration_date: The previous report on Form 3 inadvertently indicated that all of the Pre-Funded Warrants beneficially owned by the Reporting Persons have an exercise price of $0.0001 per share and no expiration date. Footnotes (1), (2), (3), (6) and (7) and the related disclosures correct the Form 3 with respect to the terms of the Pre-Funded Warrants beneficially owned by the Reporting Persons.

F4 · ownership.nature: The reported securities are directly owned by certain private funds managed by Redmile Group, LLC (collectively, the "Funds") and may be deemed beneficially owned by Redmile Group, LLC ("Redmile") as investment manager of the Funds. The reported securities may also be deemed beneficially owned by Jeremy Green as the principal of Redmile. Each of Redmile and Mr. Green (the "Reporting Persons") disclaims beneficial ownership of the reported securities except to the extent of their pecuniary interest therein, if any. This report shall not be deemed an admission that such Reporting Persons are the beneficial owners of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

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July 22, 2026 Filed Jul 25, 2026 01:00 UTC
Green JeremyDirector
Exercise / conversionPre-Funded Warrants to Purchase Common Stock · Derivative 101,089 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0001104659-26-086733 · tm2621190-2_4seq1.xml · derivative · entry 3

Redmile Group, LLC · CIK 0001425738 · Director

Green Jeremy · CIK 0001650527 · Director

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 101,089 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: The Pre-Funded Warrants are exercisable at any time on or after the original issuance on July 23, 2019 until the seven-year anniversary of the original issuance date, at an exercise price equal to $0.0025 per share, subject to a 9.99% beneficial ownership blocker.

F8 · derivative.exercise_price: The previous report on Form 3 inadvertently indicated that all of the Pre-Funded Warrants beneficially owned by the Reporting Persons have an exercise price of $0.0001 per share and no expiration date. Footnotes (1), (2), (3), (6) and (7) and the related disclosures correct the Form 3 with respect to the terms of the Pre-Funded Warrants beneficially owned by the Reporting Persons.

F5 · kind: On July 22, 2026, the Reporting Persons exercised the reported Pre-Funded Warrants through a "cashless exercise" resulting in the Issuer withholding 60 shares of Common Stock to pay the exercise price and issuing the remaining 195,151 shares of Common Stock to the applicable Funds. The number of shares withheld to pay the aggregate exercise price for the cashless exercise of the Pre-Funded Warrants was based on the closing sale price per share of the Common Stock on the trading date immediately prior to the exercise date, per the terms of the Pre-Funded Warrants.

F1 · derivative.exercise_date: The Pre-Funded Warrants are exercisable at any time on or after the original issuance on July 23, 2019 until the seven-year anniversary of the original issuance date, at an exercise price equal to $0.0025 per share, subject to a 9.99% beneficial ownership blocker.

F8 · derivative.exercise_date: The previous report on Form 3 inadvertently indicated that all of the Pre-Funded Warrants beneficially owned by the Reporting Persons have an exercise price of $0.0001 per share and no expiration date. Footnotes (1), (2), (3), (6) and (7) and the related disclosures correct the Form 3 with respect to the terms of the Pre-Funded Warrants beneficially owned by the Reporting Persons.

F1 · derivative.expiration_date: The Pre-Funded Warrants are exercisable at any time on or after the original issuance on July 23, 2019 until the seven-year anniversary of the original issuance date, at an exercise price equal to $0.0025 per share, subject to a 9.99% beneficial ownership blocker.

F8 · derivative.expiration_date: The previous report on Form 3 inadvertently indicated that all of the Pre-Funded Warrants beneficially owned by the Reporting Persons have an exercise price of $0.0001 per share and no expiration date. Footnotes (1), (2), (3), (6) and (7) and the related disclosures correct the Form 3 with respect to the terms of the Pre-Funded Warrants beneficially owned by the Reporting Persons.

F4 · ownership.nature: The reported securities are directly owned by certain private funds managed by Redmile Group, LLC (collectively, the "Funds") and may be deemed beneficially owned by Redmile Group, LLC ("Redmile") as investment manager of the Funds. The reported securities may also be deemed beneficially owned by Jeremy Green as the principal of Redmile. Each of Redmile and Mr. Green (the "Reporting Persons") disclaims beneficial ownership of the reported securities except to the extent of their pecuniary interest therein, if any. This report shall not be deemed an admission that such Reporting Persons are the beneficial owners of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

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July 22, 2026 Filed Jul 25, 2026 01:00 UTC
Green JeremyDirector
Tax withholdingCommon Stock 60 Not disclosed Not disclosed
Disclosure

SEC source: 0001104659-26-086733 · tm2621190-2_4seq1.xml · nonDerivative · entry 2

Redmile Group, LLC · CIK 0001425738 · Director

Green Jeremy · CIK 0001650527 · Director

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 636,852

F5 · kind: On July 22, 2026, the Reporting Persons exercised the reported Pre-Funded Warrants through a "cashless exercise" resulting in the Issuer withholding 60 shares of Common Stock to pay the exercise price and issuing the remaining 195,151 shares of Common Stock to the applicable Funds. The number of shares withheld to pay the aggregate exercise price for the cashless exercise of the Pre-Funded Warrants was based on the closing sale price per share of the Common Stock on the trading date immediately prior to the exercise date, per the terms of the Pre-Funded Warrants.

F5 · price: On July 22, 2026, the Reporting Persons exercised the reported Pre-Funded Warrants through a "cashless exercise" resulting in the Issuer withholding 60 shares of Common Stock to pay the exercise price and issuing the remaining 195,151 shares of Common Stock to the applicable Funds. The number of shares withheld to pay the aggregate exercise price for the cashless exercise of the Pre-Funded Warrants was based on the closing sale price per share of the Common Stock on the trading date immediately prior to the exercise date, per the terms of the Pre-Funded Warrants.

F4 · ownership.nature: The reported securities are directly owned by certain private funds managed by Redmile Group, LLC (collectively, the "Funds") and may be deemed beneficially owned by Redmile Group, LLC ("Redmile") as investment manager of the Funds. The reported securities may also be deemed beneficially owned by Jeremy Green as the principal of Redmile. Each of Redmile and Mr. Green (the "Reporting Persons") disclaims beneficial ownership of the reported securities except to the extent of their pecuniary interest therein, if any. This report shall not be deemed an admission that such Reporting Persons are the beneficial owners of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

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July 22, 2026 Filed Jul 25, 2026 01:00 UTC
Green JeremyDirector
Exercise / conversionCommon Stock 195,211 Not disclosed Not disclosed
Disclosure

SEC source: 0001104659-26-086733 · tm2621190-2_4seq1.xml · nonDerivative · entry 1

Redmile Group, LLC · CIK 0001425738 · Director

Green Jeremy · CIK 0001650527 · Director

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 636,912

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.

F5 · kind: On July 22, 2026, the Reporting Persons exercised the reported Pre-Funded Warrants through a "cashless exercise" resulting in the Issuer withholding 60 shares of Common Stock to pay the exercise price and issuing the remaining 195,151 shares of Common Stock to the applicable Funds. The number of shares withheld to pay the aggregate exercise price for the cashless exercise of the Pre-Funded Warrants was based on the closing sale price per share of the Common Stock on the trading date immediately prior to the exercise date, per the terms of the Pre-Funded Warrants.

F5 · price: On July 22, 2026, the Reporting Persons exercised the reported Pre-Funded Warrants through a "cashless exercise" resulting in the Issuer withholding 60 shares of Common Stock to pay the exercise price and issuing the remaining 195,151 shares of Common Stock to the applicable Funds. The number of shares withheld to pay the aggregate exercise price for the cashless exercise of the Pre-Funded Warrants was based on the closing sale price per share of the Common Stock on the trading date immediately prior to the exercise date, per the terms of the Pre-Funded Warrants.

F4 · ownership.nature: The reported securities are directly owned by certain private funds managed by Redmile Group, LLC (collectively, the "Funds") and may be deemed beneficially owned by Redmile Group, LLC ("Redmile") as investment manager of the Funds. The reported securities may also be deemed beneficially owned by Jeremy Green as the principal of Redmile. Each of Redmile and Mr. Green (the "Reporting Persons") disclaims beneficial ownership of the reported securities except to the extent of their pecuniary interest therein, if any. This report shall not be deemed an admission that such Reporting Persons are the beneficial owners of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

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June 11, 2026 Filed Jun 15, 2026 22:51 UTC GrantCommon Stock 24,000 $0.00 $0.00
Disclosure

SEC source: 0000905148-26-002951 · form4.xml · nonDerivative · entry 1

Cherry Brian N · CIK 0001290922 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 62,320

F1 · shares: These restricted stock units shall vest as to 1/3 of the shares on the first, second and third anniversaries of June 11, 2026, subject to the Reporting Person's continuous service.

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June 09, 2026 Filed Jun 11, 2026 20:36 UTC
Ciongoli Gregory AustinDirector · 10% owner · See Remarks
GrantCommon Stock 12,000 $0.00 $0.00
Disclosure

SEC source: 0000905148-26-002919 · form4.xml · nonDerivative · entry 1

Ciongoli Gregory Austin · CIK 0002023732 · Director · 10% owner · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,000

F1 · shares: These restricted stock units shall vest on the earlier of June 9, 2027 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service.

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June 09, 2026 Filed Jun 11, 2026 20:37 UTC GrantCommon Stock 12,000 $0.00 $0.00
Disclosure

SEC source: 0000905148-26-002921 · form4.xml · nonDerivative · entry 1

HEIDEN WILLIAM K · CIK 0001214939 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,188

F1 · shares: These restricted stock units shall vest on the earlier of June 9, 2027 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service.

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June 09, 2026 Filed Jun 11, 2026 20:36 UTC GrantCommon Stock 12,000 $0.00 $0.00
Disclosure

SEC source: 0000905148-26-002920 · form4.xml · nonDerivative · entry 1

Fust Matthew K · CIK 0001397266 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,188

F1 · shares: These restricted stock units shall vest on the earlier of June 9, 2027 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service.

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May 18, 2026 Filed May 20, 2026 21:24 UTC
Grant-Huerta YaninaChief Accounting Officer
SaleCommon Stock 2,414 $9.13 $22,036.44
Disclosure

SEC source: 0000905148-26-002570 · form4.xml · nonDerivative · entry 1

Grant-Huerta Yanina · CIK 0002064348 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,636

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: Represents the weighted average price. The shares were sold in multiple transactions at prices ranging from $9.12 to $9.40, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

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May 18, 2026 Filed May 20, 2026 21:24 UTC
Nguyen AnhCoDirector · President and CEO
SaleCommon Stock 5,241 $9.13 $47,844.56
Disclosure

SEC source: 0000905148-26-002571 · form4.xml · nonDerivative · entry 1

Nguyen AnhCo · CIK 0001977970 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 137,837

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: Represents the weighted average price. The shares were sold in multiple transactions at prices ranging from $9.12 to $9.40, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

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May 07, 2026 Filed May 11, 2026 22:45 UTC
Huang JamesDirector · 10% owner
SaleCommon Stock 313,446 $10.10 $3,165,020.99
Disclosure

SEC source: 0001193125-26-217380 · ownership.xml · nonDerivative · entry 1

Panacea Innovation Ltd · CIK 0002010692 · 10% owner

Huang James · CIK 0001573160 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 1,011,000

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $10.00 to $10.50, inclusive. The Reporting Person undertake to provide to the Issuer, any securityholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F2 · ownership.nature: Represents securities held by Panacea Venture Healthcare Fund II, L.P.

F3 · ownership.nature: James Huang is the sole owner of Panacea Innovation Limited, which is the sole owner of Panacea Venture Healthcare Fund II GP Company, Ltd. ("Fund II GP") and Panacea Opportunity Fund I GP Company, Ltd. ("Opportunity Fund GP"), which are the general partners of Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P. As a result, each of the Reporting Persons may be deemed to share beneficial ownership of the securities held of record by Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P., but each disclaims such beneficial ownership.

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May 07, 2026 Filed May 11, 2026 21:34 UTC PurchaseCommon Stock 507,407 $9.35 $4,744,255.45
Disclosure

SEC source: 0000935836-26-000239 · ownership.xml · nonDerivative · entry 1

EcoR1 Capital, LLC · CIK 0001587114 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See Note

Disclosed balance after: 1,552,000

F2 · shares: Qualified Fund purchased 474,780 of the shares puchased in this transaction.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $8.85 to $9.39 inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote.

F4 · balance_after: After this transaction, Qualified Fund held 1,445,609 shares of the Issuer's Common Stock.

F1 · ownership.nature: The reporting persons are EcoR1 Capital, LLC ("EcoR1"), Oleg Nodelman and EcoR1 Capital Fund Qualified, L.P. ("Qualified Fund"). EcoR1 is the general partner and investment adviser of private funds, including Qualified Fund (the "Funds"). Mr. Nodelman is the manager and controller owner of EcoR1. EcoR1 is filing this Form 4 for itself, Mr. Nodelman and Qualified Fund. The reporting persons are filing this Form 4 jointly, but not as a group, and each expressly disclaims membership in a group within the meaning of Rule 13d-5(b) under the Securities Exchange Act of 1934. The Funds hold these securities directly for the benefit of their investors. EcoR1 may be deemed to indirectly beneficially own them as the investment adviser to the Funds. Mr. Nodelman may be deemed to indirectly beneficially own them as the control person of EcoR1. The reporting persons disclaim beneficial ownership of the securities except to the extent of their respective pecuniary interests therein.

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March 17, 2026 Filed Mar 19, 2026 20:30 UTC
Huang JamesDirector · 10% owner
Exercise / conversionWarrants · Derivative 259,163 $6.61 Strike: $0.00 $1,713,041.51
Disclosure

SEC source: 0001193125-26-116060 · ownership.xml · derivative · entry 4

Panacea Innovation Ltd · CIK 0002010692 · 10% owner

Huang James · CIK 0001573160 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 259,163 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.

F4 · derivative.exercise_date: The warrants are immediately exercisable and do not expire. Pursuant to the terms of the warrants, no portion of the warrants held by a holder may be exercised to the extent that, after giving effect to the attempted exercise, such holder, together with such holder's affiliates and any other person whose beneficial ownership of the Issuer's common stock would be aggregated with such holder's for the purposes of Section 13(d) of the Exchange Act, would beneficially own in excess of 19.99% of the outstanding common stock.

F4 · derivative.expiration_date: The warrants are immediately exercisable and do not expire. Pursuant to the terms of the warrants, no portion of the warrants held by a holder may be exercised to the extent that, after giving effect to the attempted exercise, such holder, together with such holder's affiliates and any other person whose beneficial ownership of the Issuer's common stock would be aggregated with such holder's for the purposes of Section 13(d) of the Exchange Act, would beneficially own in excess of 19.99% of the outstanding common stock.

F1 · ownership.nature: Represents securities held by Panacea Opportunity Fund I, L.P.

F2 · ownership.nature: James Huang is the sole owner of Panacea Innovation Limited, which is the sole owner of Panacea Venture Healthcare Fund II GP Company, Ltd. ("Fund II GP") and Panacea Opportunity Fund I GP Company, Ltd. ("Opportunity Fund GP"), which are the general partners of Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P. As a result, each of the Reporting Persons may be deemed to share beneficial ownership of the securities held of record by Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P., but each disclaims such beneficial ownership.

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March 17, 2026 Filed Mar 19, 2026 20:30 UTC
Huang JamesDirector · 10% owner
Tax withholdingCommon Stock 5 $5.23 $26.15
Disclosure

SEC source: 0001193125-26-116060 · ownership.xml · nonDerivative · entry 2

Panacea Innovation Ltd · CIK 0002010692 · 10% owner

Huang James · CIK 0001573160 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 307,894

F1 · ownership.nature: Represents securities held by Panacea Opportunity Fund I, L.P.

F2 · ownership.nature: James Huang is the sole owner of Panacea Innovation Limited, which is the sole owner of Panacea Venture Healthcare Fund II GP Company, Ltd. ("Fund II GP") and Panacea Opportunity Fund I GP Company, Ltd. ("Opportunity Fund GP"), which are the general partners of Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P. As a result, each of the Reporting Persons may be deemed to share beneficial ownership of the securities held of record by Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P., but each disclaims such beneficial ownership.

Read SEC document
March 17, 2026 Filed Mar 19, 2026 20:30 UTC
Huang JamesDirector · 10% owner
Exercise / conversionCommon Stock 259,163 $0.00 $25.92
Disclosure

SEC source: 0001193125-26-116060 · ownership.xml · nonDerivative · entry 1

Panacea Innovation Ltd · CIK 0002010692 · 10% owner

Huang James · CIK 0001573160 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 307,899

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 · ownership.nature: Represents securities held by Panacea Opportunity Fund I, L.P.

F2 · ownership.nature: James Huang is the sole owner of Panacea Innovation Limited, which is the sole owner of Panacea Venture Healthcare Fund II GP Company, Ltd. ("Fund II GP") and Panacea Opportunity Fund I GP Company, Ltd. ("Opportunity Fund GP"), which are the general partners of Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P. As a result, each of the Reporting Persons may be deemed to share beneficial ownership of the securities held of record by Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P., but each disclaims such beneficial ownership.

Read SEC document
March 09, 2026 Filed Mar 11, 2026 21:45 UTC
Grant-Huerta YaninaChief Accounting Officer
GrantCommon Stock 20,300 $0.00 $0.00
Disclosure

SEC source: 0000905148-26-001224 · form4.xml · nonDerivative · entry 1

Grant-Huerta Yanina · CIK 0002064348 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,050

F1 · shares: These restricted stock units ("RSUs") vest as to 1/8th of the total number of shares (rounded down to the next whole number of shares) on the second Quarterly Vesting Date (as defined below) following March 9, 2026, and as to 1/8th of the total number of shares (rounded down to the next whole number of shares) on the next seven Quarterly Vesting Dates, such that all of the shares subject to the RSUs shall be vested on the last Quarterly Vesting Date, subject to the reporting person's continuous employment. "Quarterly Vesting Date" means March 1, May 15, August 15, and November 15 of each year, provided that if such date falls on a weekend or holiday, the Quarterly Vesting Date shall be the first business day after such date.

Read SEC document
March 09, 2026 Filed Mar 11, 2026 21:46 UTC
Nguyen AnhCoDirector · President and CEO
GrantCommon Stock 81,100 $0.00 $0.00
Disclosure

SEC source: 0000905148-26-001225 · form4.xml · nonDerivative · entry 1

Nguyen AnhCo · CIK 0001977970 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 143,078

F1 · shares: These restricted stock units ("RSUs") vest as to 1/8th of the total number of shares (rounded down to the next whole number of shares) on the second Quarterly Vesting Date (as defined below) following March 9, 2026, and as to 1/8th of the total number of shares (rounded down to the next whole number of shares) on the next seven Quarterly Vesting Dates, such that all of the shares subject to the RSUs shall be vested on the last Quarterly Vesting Date, subject to the reporting person's continuous employment. "Quarterly Vesting Date" means March 1, May 15, August 15, and November 15 of each year, provided that if such date falls on a weekend or holiday, the Quarterly Vesting Date shall be the first business day after such date.

Read SEC document
March 02, 2026 Filed Mar 4, 2026 21:28 UTC
Grant-Huerta YaninaChief Accounting Officer
SaleCommon Stock 100 $5.08 $508.30
Disclosure

SEC source: 0000905148-26-001144 · form4.xml · nonDerivative · entry 4

Grant-Huerta Yanina · CIK 0002064348 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,750

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on March 2, 2026 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

Read SEC document
March 02, 2026 Filed Mar 4, 2026 21:28 UTC
Grant-Huerta YaninaChief Accounting Officer
SaleCommon Stock 377 $5.08 $1,915.91
Disclosure

SEC source: 0000905148-26-001144 · form4.xml · nonDerivative · entry 3

Grant-Huerta Yanina · CIK 0002064348 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,850

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on March 2, 2026 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

Read SEC document
March 02, 2026 Filed Mar 4, 2026 21:28 UTC
Grant-Huerta YaninaChief Accounting Officer
SaleCommon Stock 1,603 $5.08 $8,144.84
Disclosure

SEC source: 0000905148-26-001144 · form4.xml · nonDerivative · entry 2

Grant-Huerta Yanina · CIK 0002064348 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,227

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on March 2, 2026 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

Read SEC document
March 02, 2026 Filed Mar 4, 2026 21:28 UTC
Grant-Huerta YaninaChief Accounting Officer
SaleCommon Stock 24 $5.08 $121.85
Disclosure

SEC source: 0000905148-26-001144 · form4.xml · nonDerivative · entry 1

Grant-Huerta Yanina · CIK 0002064348 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,830

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on March 2, 2026 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

F3 · balance_after: This amount includes 400 shares purchased under the Issuer's Employee Stock Purchase Plan on November 28, 2025.

Read SEC document
March 02, 2026 Filed Mar 4, 2026 21:28 UTC
Nguyen AnhCoDirector · President and CEO
SaleCommon Stock 1,442 $5.09 $7,335.45
Disclosure

SEC source: 0000905148-26-001143 · form4.xml · nonDerivative · entry 4

Nguyen AnhCo · CIK 0001977970 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61,978

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on March 2, 2026 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

Read SEC document
March 02, 2026 Filed Mar 4, 2026 21:28 UTC
Nguyen AnhCoDirector · President and CEO
SaleCommon Stock 1,298 $5.09 $6,601.63
Disclosure

SEC source: 0000905148-26-001143 · form4.xml · nonDerivative · entry 3

Nguyen AnhCo · CIK 0001977970 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 63,420

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on March 2, 2026 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

Read SEC document
March 02, 2026 Filed Mar 4, 2026 21:28 UTC
Nguyen AnhCoDirector · President and CEO
SaleCommon Stock 58 $5.08 $294.64
Disclosure

SEC source: 0000905148-26-001143 · form4.xml · nonDerivative · entry 2

Nguyen AnhCo · CIK 0001977970 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,718

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on March 2, 2026 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

Read SEC document
March 02, 2026 Filed Mar 4, 2026 21:28 UTC
Nguyen AnhCoDirector · President and CEO
SaleCommon Stock 198 $5.08 $1,005.64
Disclosure

SEC source: 0000905148-26-001143 · form4.xml · nonDerivative · entry 1

Nguyen AnhCo · CIK 0001977970 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,776

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on March 2, 2026 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

Read SEC document
January 12, 2026 Filed Jan 15, 2026 02:16 UTC
Huang JamesDirector · 10% owner
SaleCommon Stock 80,554 $6.07 $489,019.17
Disclosure

SEC source: 0001193125-26-013358 · ownership.xml · nonDerivative · entry 1

Panacea Innovation Ltd · CIK 0002010692 · 10% owner

Huang James · CIK 0001573160 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 1,324,446

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $5.9888 to $6.2838, inclusive. The Reporting Person undertake to provide to the Issuer, any securityholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F1 · ownership.nature: Represents securities held by Panacea Venture Healthcare Fund II, L.P.

F2 · ownership.nature: James Huang is the sole owner of Panacea Innovation Limited, which is the sole owner of Panacea Venture Healthcare Fund II GP Company, Ltd. ("Fund II GP") and Panacea Opportunity Fund I GP Company, Ltd. ("Opportunity Fund GP"), which are the general partners of Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P. As a result, each of the Reporting Persons may be deemed to share beneficial ownership of the securities held of record by Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P., but each disclaims such beneficial ownership.

Read SEC document
November 28, 2025 Filed Dec 1, 2025 22:00 UTC
Huang JamesDirector · 10% owner
Exercise / conversionWarrants · Derivative 48,737 $6.61 Strike: $0.00 $322,146.70
Disclosure

SEC source: 0001193125-25-304018 · ownership.xml · derivative · entry 4

Panacea Innovation Ltd · CIK 0002010692 · 10% owner

Huang James · CIK 0001573160 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 259,163

Underlying: Common Stock · 48,737 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.

F4 · derivative.exercise_date: The warrants are immediately exercisable and do not expire. Pursuant to the terms of the warrants, no portion of the warrants held by a holder may be exercised to the extent that, after giving effect to the attempted exercise, such holder, together with such holder's affiliates and any other person whose beneficial ownership of the Issuer's common stock would be aggregated with such holder's for the purposes of Section 13(d) of the Exchange Act, would beneficially own in excess of 19.99% of the outstanding common stock.

F4 · derivative.expiration_date: The warrants are immediately exercisable and do not expire. Pursuant to the terms of the warrants, no portion of the warrants held by a holder may be exercised to the extent that, after giving effect to the attempted exercise, such holder, together with such holder's affiliates and any other person whose beneficial ownership of the Issuer's common stock would be aggregated with such holder's for the purposes of Section 13(d) of the Exchange Act, would beneficially own in excess of 19.99% of the outstanding common stock.

F4 · balance_after: The warrants are immediately exercisable and do not expire. Pursuant to the terms of the warrants, no portion of the warrants held by a holder may be exercised to the extent that, after giving effect to the attempted exercise, such holder, together with such holder's affiliates and any other person whose beneficial ownership of the Issuer's common stock would be aggregated with such holder's for the purposes of Section 13(d) of the Exchange Act, would beneficially own in excess of 19.99% of the outstanding common stock.

F1 · ownership.nature: Represents securities held by Panacea Opportunity Fund I, L.P.

F2 · ownership.nature: James Huang is the sole owner of Panacea Innovation Limited, which is the sole owner of Panacea Venture Healthcare Fund II GP Company, Ltd. ("Fund II GP") and Panacea Opportunity Fund I GP Company, Ltd. ("Opportunity Fund GP"), which are the general partners of Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P. As a result, each of the Reporting Persons may be deemed to share beneficial ownership of the securities held of record by Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P., but each disclaims such beneficial ownership.

Read SEC document
November 28, 2025 Filed Dec 1, 2025 22:00 UTC
Huang JamesDirector · 10% owner
Tax withholdingCommon Stock 1 $14.03 $14.03
Disclosure

SEC source: 0001193125-25-304018 · ownership.xml · nonDerivative · entry 2

Panacea Innovation Ltd · CIK 0002010692 · 10% owner

Huang James · CIK 0001573160 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 48,736

F1 · ownership.nature: Represents securities held by Panacea Opportunity Fund I, L.P.

F2 · ownership.nature: James Huang is the sole owner of Panacea Innovation Limited, which is the sole owner of Panacea Venture Healthcare Fund II GP Company, Ltd. ("Fund II GP") and Panacea Opportunity Fund I GP Company, Ltd. ("Opportunity Fund GP"), which are the general partners of Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P. As a result, each of the Reporting Persons may be deemed to share beneficial ownership of the securities held of record by Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P., but each disclaims such beneficial ownership.

Read SEC document
November 28, 2025 Filed Dec 1, 2025 22:00 UTC
Huang JamesDirector · 10% owner
Exercise / conversionCommon Stock 48,737 $0.00 $4.87
Disclosure

SEC source: 0001193125-25-304018 · ownership.xml · nonDerivative · entry 1

Panacea Innovation Ltd · CIK 0002010692 · 10% owner

Huang James · CIK 0001573160 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 48,737

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 · ownership.nature: Represents securities held by Panacea Opportunity Fund I, L.P.

F2 · ownership.nature: James Huang is the sole owner of Panacea Innovation Limited, which is the sole owner of Panacea Venture Healthcare Fund II GP Company, Ltd. ("Fund II GP") and Panacea Opportunity Fund I GP Company, Ltd. ("Opportunity Fund GP"), which are the general partners of Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P. As a result, each of the Reporting Persons may be deemed to share beneficial ownership of the securities held of record by Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P., but each disclaims such beneficial ownership.

Read SEC document
November 17, 2025 Filed Nov 19, 2025 21:55 UTC
Grant-Huerta YaninaChief Accounting Officer
SaleCommon Stock 74 $13.19 $976.13
Disclosure

SEC source: 0000905148-25-004140 · form4.xml · nonDerivative · entry 3

Grant-Huerta Yanina · CIK 0002064348 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,454

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on November 17, 2025 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

Read SEC document
November 17, 2025 Filed Nov 19, 2025 21:55 UTC
Grant-Huerta YaninaChief Accounting Officer
SaleCommon Stock 85 $13.19 $1,120.98
Disclosure

SEC source: 0000905148-25-004140 · form4.xml · nonDerivative · entry 2

Grant-Huerta Yanina · CIK 0002064348 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,528

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on November 17, 2025 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

Read SEC document
November 17, 2025 Filed Nov 19, 2025 21:55 UTC
Grant-Huerta YaninaChief Accounting Officer
SaleCommon Stock 1,645 $13.19 $21,690.97
Disclosure

SEC source: 0000905148-25-004140 · form4.xml · nonDerivative · entry 1

Grant-Huerta Yanina · CIK 0002064348 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,613

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on November 17, 2025 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

Read SEC document
November 17, 2025 Filed Nov 19, 2025 21:55 UTC
Nguyen AnhCoDirector · President and CEO
SaleCommon Stock 56 $13.19 $738.53
Disclosure

SEC source: 0000905148-25-004141 · form4.xml · nonDerivative · entry 2

Nguyen AnhCo · CIK 0001977970 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,974

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on November 17, 2025 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

Read SEC document
November 17, 2025 Filed Nov 19, 2025 21:55 UTC
Nguyen AnhCoDirector · President and CEO
SaleCommon Stock 2,859 $13.19 $37,698.77
Disclosure

SEC source: 0000905148-25-004141 · form4.xml · nonDerivative · entry 1

Nguyen AnhCo · CIK 0001977970 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 65,030

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on November 17, 2025 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

Read SEC document
August 18, 2025 Filed Aug 20, 2025 20:08 UTC
Grant-Huerta YaninaChief Accounting Officer
SaleCommon Stock 1,668 $11.61 $19,372.15
Disclosure

SEC source: 0000905148-25-003069 · form4.xml · nonDerivative · entry 3

Grant-Huerta Yanina · CIK 0002064348 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,258

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on August 18, 2025 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

Read SEC document
August 18, 2025 Filed Aug 20, 2025 20:08 UTC
Grant-Huerta YaninaChief Accounting Officer
SaleCommon Stock 86 $11.61 $998.72
Disclosure

SEC source: 0000905148-25-003069 · form4.xml · nonDerivative · entry 2

Grant-Huerta Yanina · CIK 0002064348 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,926

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on August 18, 2025 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

Read SEC document
August 18, 2025 Filed Aug 20, 2025 20:08 UTC
Grant-Huerta YaninaChief Accounting Officer
SaleCommon Stock 55 $11.61 $638.50
Disclosure

SEC source: 0000905148-25-003069 · form4.xml · nonDerivative · entry 1

Grant-Huerta Yanina · CIK 0002064348 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,012

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on August 18, 2025 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

Read SEC document
August 18, 2025 Filed Aug 20, 2025 20:11 UTC
Nguyen AnhCoDirector · President and CEO
SaleCommon Stock 1,620 $11.62 $18,819.54
Disclosure

SEC source: 0000905148-25-003070 · form4.xml · nonDerivative · entry 3

Nguyen AnhCo · CIK 0001977970 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 67,889

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on August 18, 2025 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

Read SEC document
August 18, 2025 Filed Aug 20, 2025 20:11 UTC
Nguyen AnhCoDirector · President and CEO
SaleCommon Stock 1,281 $11.62 $14,878.82
Disclosure

SEC source: 0000905148-25-003070 · form4.xml · nonDerivative · entry 2

Nguyen AnhCo · CIK 0001977970 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 69,509

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on August 18, 2025 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

Read SEC document
August 18, 2025 Filed Aug 20, 2025 20:11 UTC
Nguyen AnhCoDirector · President and CEO
SaleCommon Stock 57 $11.61 $661.94
Disclosure

SEC source: 0000905148-25-003070 · form4.xml · nonDerivative · entry 1

Nguyen AnhCo · CIK 0001977970 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 70,790

F1 · kind: Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on August 18, 2025 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

Read SEC document
August 15, 2025 Filed Aug 20, 2025 00:15 UTC
Huang JamesDirector · 10% owner
PurchaseCommon Stock 55,000 $12.19 $670,422.50
Disclosure

SEC source: 0000950170-25-110310 · ownership.xml · nonDerivative · entry 1

Panacea Innovation Ltd · CIK 0002010692 · 10% owner

Huang James · CIK 0001573160 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 1,405,000

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $11.83 to $12.44, inclusive. The Reporting Person undertake to provide to the Issuer, any securityholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth above.

F2 · ownership.nature: Represents securities held by Panacea Venture Healthcare Fund II, L.P.

F3 · ownership.nature: James Huang is the sole owner of Panacea Innovation Limited, which is the sole owner of Panacea Venture Healthcare Fund II GP Company, Ltd. ("Fund II GP") and Panacea Opportunity Fund I GP Company, Ltd. ("Opportunity Fund GP"), which are the general partners of Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P. As a result, each of the Reporting Persons may be deemed to share beneficial ownership of the securities held of record by Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P., but each disclaims such beneficial ownership.

Read SEC document
July 17, 2025 Filed Jul 21, 2025 13:00 UTC
Huang JamesDirector · 10% owner
PurchaseCommon Stock 19,335 $9.64 $186,372.00
Disclosure

SEC source: 0000950170-25-097087 · ownership.xml · nonDerivative · entry 1

Panacea Innovation Ltd · CIK 0002010692 · 10% owner

Huang James · CIK 0001573160 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 1,350,000

F1 · ownership.nature: Represents securities held by Panacea Venture Healthcare Fund II, L.P.

F2 · ownership.nature: James Huang is the sole owner of Panacea Innovation Limited, which is the sole owner of Panacea Venture Healthcare Fund II GP Company, Ltd. ("Fund II GP") and Panacea Opportunity Fund I GP Company, Ltd. ("Opportunity Fund GP"), which are the general partners of Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P. As a result, each of the Reporting Persons may be deemed to share beneficial ownership of the securities held of record by Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P., but each disclaims such beneficial ownership.

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June 10, 2025 Filed Jun 13, 2025 00:38 UTC
MALLIK AMEETDirector
GrantCommon Stock 7,828 $0.00 $0.00
Disclosure

SEC source: 0000905148-25-002138 · form4.xml · nonDerivative · entry 1

MALLIK AMEET · CIK 0001861441 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,928

F1 · shares: These restricted stock units shall vest on the earlier of June 10, 2026 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service.

F2 · balance_after: This amount reflects the 1:25 reverse stock split effected by the Issuer on June 20, 2024.

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June 10, 2025 Filed Jun 12, 2025 20:39 UTC GrantCommon Stock 7,828 $0.00 $0.00
Disclosure

SEC source: 0000905148-25-002139 · form4.xml · nonDerivative · entry 1

Roncarolo Maria Grazia · CIK 0001811671 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,368

F1 · shares: These restricted stock units shall vest on the earlier of June 10, 2026 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service.

F2 · balance_after: This amount reflects the 1:25 reverse stock split effected by the Issuer on June 20, 2024.

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June 10, 2025 Filed Jun 12, 2025 20:39 UTC GrantCommon Stock 7,828 $0.00 $0.00
Disclosure

SEC source: 0000905148-25-002140 · form4.xml · nonDerivative · entry 1

Touchon Pascal · CIK 0001780060 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 77,955

F1 · shares: These restricted stock units shall vest on the earlier of June 10, 2026 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service.

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June 10, 2025 Filed Jun 13, 2025 00:36 UTC GrantCommon Stock 7,828 $0.00 $0.00
Disclosure

SEC source: 0000905148-25-002137 · form4.xml · nonDerivative · entry 1

HEIDEN WILLIAM K · CIK 0001214939 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,188

F1 · shares: These restricted stock units shall vest on the earlier of June 10, 2026 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service.

F2 · balance_after: This amount reflects the 1:25 reverse stock split effected by the Issuer on June 20, 2024.

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June 10, 2025 Filed Jun 13, 2025 00:39 UTC GrantCommon Stock 7,828 $0.00 $0.00
Disclosure

SEC source: 0000905148-25-002142 · form4.xml · nonDerivative · entry 1

Gallagher Carol Giltner · CIK 0001329959 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,012

F1 · shares: These restricted stock units shall vest on the earlier of June 10, 2026 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service.

F2 · balance_after: This amount reflects the 1:25 reverse stock split effected by the Issuer on June 20, 2024.

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