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VASCONCELLES MICHAEL

Disclosed activity across 5 companies

Tapewire entity
41321
SEC CIK
0001734755

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Cogent Biosciences, Inc.UMRX · Entity 3793Chief Medical OfficerMarch 01, 2019April 11, 2019
Dianthus Therapeutics, Inc. /DE/MGTA · Entity 1813DirectorAugust 15, 2022August 17, 2022
Kura Oncology, Inc.KURA · Entity 4871DirectorJune 04, 2026June 04, 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.

Cogent Biosciences, Inc.

Report date March 01, 2019 · Filed April 11, 2019

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $4.36 · Expires 2029-03-01Direct61,900 Reported balance After 2019-03-01 transaction · row 1 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 1 · 2019-03-01 · Grant · Acquired 61,900 · Balance 61,900

F1: 25% of the shares vests on March 1, 2020, and the remaining shares shall vest in 36 equal monthly installments thereafter, subject to the Reporting Persons continuous service with the Issuer.

Filing footnotes · ownership attribution and instrument terms

F1: 25% of the shares vests on March 1, 2020, and the remaining shares shall vest in 36 equal monthly installments thereafter, subject to the Reporting Persons continuous service with the Issuer.

Dianthus Therapeutics, Inc. /DE/

Report date August 15, 2022 · Filed August 17, 2022

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $1.77 · Expires 2032-08-14Direct40,000 Reported balance After 2022-08-15 transaction · row 1 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 1 · 2022-08-15 · Grant · Acquired 40,000 · Balance 40,000

F1: This option shall vest and become exercisable over three years, with 33% of this option vesting on August 15, 2023, and the remainder vesting in 24 equal monthly installments thereafter.

Filing footnotes · ownership attribution and instrument terms

F1: This option shall vest and become exercisable over three years, with 33% of this option vesting on August 15, 2023, and the remainder vesting in 24 equal monthly installments thereafter.

Kura Oncology, Inc.

Report date June 04, 2026 · Filed June 04, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Option to purchase common stockSEC Table II · derivative / convertible security · Conversion / exercise price $8.77 · Expires 2036-06-03Direct35,000 Reported balance After 2026-06-04 transaction · row 1 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 1 · 2026-06-04 · Grant · Acquired 35,000 · Balance 35,000

F1: This option vests in full on the one year anniversary of the date of grant.

Filing footnotes · ownership attribution and instrument terms

F1: This option vests in full on the one year anniversary of the date of grant.

Past disclosures · reporting ended (2)

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

Day One Biopharmaceuticals, Inc.

Report date April 23, 2026 · Filed April 23, 2026

Section 16 reporting ended · disclosed 2026-04-23. Current position is not established by this disclosure.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect0 Reported balance After 2026-04-23 transaction · row 1
1 source row

Row 1 · 2026-04-23 · Disposition to issuer · Disposed 4,397 · Balance 0

F1: On March 6, 2026, Servier Pharmaceuticals LLC, a Delaware limited liability company ("Parent"), Servier Detroit Inc., a Delaware corporation and a wholly owned subsidiary of Parent ("Merger Sub"), Day One Biopharmaceuticals, Inc., a Delaware corporation (the "Company"), and Servier S.A.S., a French societe par actions simplifiee, solely as a guarantor, entered into an Agreement and Plan of Merger (the "Merger Agreement"). Pursuant to the Merger Agreement, the Merger Sub merged with and into the Company (such merger and the other transactions contemplated by the Merger Agreement, the "Merger") with the Company surviving the Merger as a wholly owned subsidiary of the Parent.

F2: Upon the closing of the Merger on April 23, 2026, each issued and outstanding share of the Company's Common Stock, par value $0.0001 per share, was either (x) purchased for $21.50 per share (the "Offer Price"), net to the seller in cash, without interest, and subject to applicable withholding taxes, on the terms and conditions set forth in the Merger Agreement, or (y) automatically converted into the right to receive the Offer Price (the "Merger Consideration"), net to the seller in cash, without interest, and subject to applicable withholding taxes, on the terms and conditions set forth in the Merger Agreement.

Stock Option (right to buy Common Stock)SEC Table II · derivative / convertible security · Conversion / exercise price $6.64 · Expires 2035-06-15Direct0 Reported balance After 2026-04-23 transaction · row 2 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 2 · 2026-04-23 · Disposition to issuer · Disposed 346,000 · Balance 0

F4: Immediately prior to the effective time of the Merger, all outstanding unvested stock options and unvested restricted stock units became fully vested. At the effective time of the Merger, each stock option and restricted stock unit was canceled and converted into the right to receive an amount in cash equal to the Merger Consideration (or, in the case of stock options, the difference between the Merger Consideration and the applicable per share exercise price), less any applicable withholding taxes.

F3: The option vests as to 1/4th of the total grant on June 16, 2026, and 1/48th of the total grant will vest on each monthly anniversary thereafter, subject to the Reporting Person's provision of service to the Issuer on each option vesting date.

Stock Option (right to buy Common Stock)SEC Table II · derivative / convertible security · Conversion / exercise price $11.16 · Expires 2036-01-29Direct0 Reported balance After 2026-04-23 transaction · row 3 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 3 · 2026-04-23 · Disposition to issuer · Disposed 171,000 · Balance 0

F4: Immediately prior to the effective time of the Merger, all outstanding unvested stock options and unvested restricted stock units became fully vested. At the effective time of the Merger, each stock option and restricted stock unit was canceled and converted into the right to receive an amount in cash equal to the Merger Consideration (or, in the case of stock options, the difference between the Merger Consideration and the applicable per share exercise price), less any applicable withholding taxes.

F5: The option vests as to 1/48th of the total shares monthly, commencing February 28, 2026, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

Restricted Stock Unit (RSU)SEC Table II · derivative / convertible securityDirect0 Reported balance After 2026-04-23 transaction · row 4 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 4 · 2026-04-23 · Disposition to issuer · Disposed 226,000 · Balance 0

F6: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock upon settlement for no consideration.

F4: Immediately prior to the effective time of the Merger, all outstanding unvested stock options and unvested restricted stock units became fully vested. At the effective time of the Merger, each stock option and restricted stock unit was canceled and converted into the right to receive an amount in cash equal to the Merger Consideration (or, in the case of stock options, the difference between the Merger Consideration and the applicable per share exercise price), less any applicable withholding taxes.

F7: The RSUs vest as to 25% of the total award on August 15, 2026, and 1/12th of the remaining RSUs vest in quarterly installments thereafter on November 15, February 15, May 15 and August 15, subject to the Reporting Person's provision of service to the Issuer on each RSU vesting date.

F8: RSUs do not expire; they either vest or are canceled prior to the RSU vesting date.

Restricted Stock Unit (RSU)SEC Table II · derivative / convertible securityDirect0 Reported balance After 2026-04-23 transaction · row 5 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 5 · 2026-04-23 · Disposition to issuer · Disposed 106,875 · Balance 0

F6: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock upon settlement for no consideration.

F4: Immediately prior to the effective time of the Merger, all outstanding unvested stock options and unvested restricted stock units became fully vested. At the effective time of the Merger, each stock option and restricted stock unit was canceled and converted into the right to receive an amount in cash equal to the Merger Consideration (or, in the case of stock options, the difference between the Merger Consideration and the applicable per share exercise price), less any applicable withholding taxes.

F9: The RSUs vest as to 1/16th of the total award in quarterly installments on February 15, May 15, August 15 and November 15, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

F8: RSUs do not expire; they either vest or are canceled prior to the RSU vesting date.

Filing footnotes · ownership attribution and instrument terms

F1: On March 6, 2026, Servier Pharmaceuticals LLC, a Delaware limited liability company ("Parent"), Servier Detroit Inc., a Delaware corporation and a wholly owned subsidiary of Parent ("Merger Sub"), Day One Biopharmaceuticals, Inc., a Delaware corporation (the "Company"), and Servier S.A.S., a French societe par actions simplifiee, solely as a guarantor, entered into an Agreement and Plan of Merger (the "Merger Agreement"). Pursuant to the Merger Agreement, the Merger Sub merged with and into the Company (such merger and the other transactions contemplated by the Merger Agreement, the "Merger") with the Company surviving the Merger as a wholly owned subsidiary of the Parent.

F2: Upon the closing of the Merger on April 23, 2026, each issued and outstanding share of the Company's Common Stock, par value $0.0001 per share, was either (x) purchased for $21.50 per share (the "Offer Price"), net to the seller in cash, without interest, and subject to applicable withholding taxes, on the terms and conditions set forth in the Merger Agreement, or (y) automatically converted into the right to receive the Offer Price (the "Merger Consideration"), net to the seller in cash, without interest, and subject to applicable withholding taxes, on the terms and conditions set forth in the Merger Agreement.

F3: The option vests as to 1/4th of the total grant on June 16, 2026, and 1/48th of the total grant will vest on each monthly anniversary thereafter, subject to the Reporting Person's provision of service to the Issuer on each option vesting date.

F4: Immediately prior to the effective time of the Merger, all outstanding unvested stock options and unvested restricted stock units became fully vested. At the effective time of the Merger, each stock option and restricted stock unit was canceled and converted into the right to receive an amount in cash equal to the Merger Consideration (or, in the case of stock options, the difference between the Merger Consideration and the applicable per share exercise price), less any applicable withholding taxes.

F5: The option vests as to 1/48th of the total shares monthly, commencing February 28, 2026, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

F6: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock upon settlement for no consideration.

F7: The RSUs vest as to 25% of the total award on August 15, 2026, and 1/12th of the remaining RSUs vest in quarterly installments thereafter on November 15, February 15, May 15 and August 15, subject to the Reporting Person's provision of service to the Issuer on each RSU vesting date.

F8: RSUs do not expire; they either vest or are canceled prior to the RSU vesting date.

F9: The RSUs vest as to 1/16th of the total award in quarterly installments on February 15, May 15, August 15 and November 15, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

ImmunoGen, Inc.

Report date February 12, 2024 · Filed February 12, 2024

Section 16 reporting ended · disclosed 2024-02-12. Current position is not established by this disclosure.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect0 Reported balance After 2024-02-12 transaction · row 1
1 source row

Row 1 · 2024-02-12 · Disposition to issuer · Disposed 1,327 · Balance 0

F1: This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the "Merger Agreement"), dated November 30, 2023, by and among the Issuer, AbbVie Inc., a Delaware corporation ("AbbVie"), Athene Subsidiary LLC, a Delaware limited liability company and wholly owned subsidiary of AbbVie ("Intermediate Sub"), and Athene Merger Sub Inc., a Massachusetts corporation and wholly owned subsidiary of Intermediate Sub ("Purchaser"), pursuant to which Purchaser merged with and into the Issuer with the Issuer continuing as the surviving corporation (the "Merger"). At the effective time of the Merger (the "Effective Time"), each share of common stock, par value $.01 per share, of the Issuer (the "Common Stock"), that was issued and outstanding immediately prior to the Effective Time was converted into the right to receive an amount in cash equal to $31.26, without interest (the "Merger Consideration").

Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $5.16 · Expires 2032-12-29Direct0 Reported balance After 2024-02-12 transaction · row 2 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 2 · 2024-02-12 · Disposition to issuer · Disposed 960,000 · Balance 0

F2: Pursuant to the Merger Agreement, at the Effective Time, each option to purchase shares of Common Stock ("Stock Option") granted prior to the date of the Merger Agreement that was outstanding immediately prior to the Effective Time was canceled and the Reporting Person was entitled to receive (without interest), in consideration of the cancellation of such Stock Option, an amount in cash (less any applicable withholding taxes) equal to (i) the total number of shares of Common Stock subject to such Stock Option immediately prior to the Effective Time, multiplied by (ii) the excess, if any, of the Merger Consideration over the applicable exercise price per share of Common Stock under such Stock Option.

Restricted Stock UnitSEC Table II · derivative / convertible security · Conversion / exercise price $0.00Direct0 Reported balance After 2024-02-12 transaction · row 3 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 3 · 2024-02-12 · Disposition to issuer · Disposed 50,515 · Balance 0

F3: Pursuant to the Merger Agreement, at the Effective Time, each restricted stock unit ("RSU") granted on or after the date of the Merger Agreement that was outstanding immediately prior to the Effective Time was converted into a grant of restricted stock unit awards in respect of a number of shares of AbbVie common stock equal to the number of shares of Common Stock underlying such RSU as of immediately prior to the Effective Time multiplied by 0.18, and otherwise with the same terms and conditions that were applicable immediately prior to the Effective Time.

Filing footnotes · ownership attribution and instrument terms

F1: This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the "Merger Agreement"), dated November 30, 2023, by and among the Issuer, AbbVie Inc., a Delaware corporation ("AbbVie"), Athene Subsidiary LLC, a Delaware limited liability company and wholly owned subsidiary of AbbVie ("Intermediate Sub"), and Athene Merger Sub Inc., a Massachusetts corporation and wholly owned subsidiary of Intermediate Sub ("Purchaser"), pursuant to which Purchaser merged with and into the Issuer with the Issuer continuing as the surviving corporation (the "Merger"). At the effective time of the Merger (the "Effective Time"), each share of common stock, par value $.01 per share, of the Issuer (the "Common Stock"), that was issued and outstanding immediately prior to the Effective Time was converted into the right to receive an amount in cash equal to $31.26, without interest (the "Merger Consideration").

F2: Pursuant to the Merger Agreement, at the Effective Time, each option to purchase shares of Common Stock ("Stock Option") granted prior to the date of the Merger Agreement that was outstanding immediately prior to the Effective Time was canceled and the Reporting Person was entitled to receive (without interest), in consideration of the cancellation of such Stock Option, an amount in cash (less any applicable withholding taxes) equal to (i) the total number of shares of Common Stock subject to such Stock Option immediately prior to the Effective Time, multiplied by (ii) the excess, if any, of the Merger Consideration over the applicable exercise price per share of Common Stock under such Stock Option.

F3: Pursuant to the Merger Agreement, at the Effective Time, each restricted stock unit ("RSU") granted on or after the date of the Merger Agreement that was outstanding immediately prior to the Effective Time was converted into a grant of restricted stock unit awards in respect of a number of shares of AbbVie common stock equal to the number of shares of Common Stock underlying such RSU as of immediately prior to the Effective Time multiplied by 0.18, and otherwise with the same terms and conditions that were applicable immediately prior to the Effective Time.

Transaction history

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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 dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
June 04, 2026 Filed Jun 4, 2026 22:30 UTC Kura Oncology, Inc. KURA · Entity 4871 GrantOption to purchase common stock · Derivative 35,000 $0.00 Strike: $8.77 $0.00
Disclosure

SEC source: 0001193125-26-257902 · ownership.xml · derivative · entry 1

VASCONCELLES MICHAEL · CIK 0001734755 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,000

Underlying: Common Stock · 35,000 shares

Expires 2036-06-03

F1 · derivative.exercise_date: This option vests in full on the one year anniversary of the date of grant.

Read SEC document
April 23, 2026 Filed Apr 23, 2026 20:39 UTC Day One Biopharmaceuticals, Inc. DAWN · Entity 51180 Disposition to issuerRestricted Stock Unit (RSU) · Derivative 106,875 Not disclosed Not disclosed
Disclosure

SEC source: 0001734755-26-000005 · form4-04232026_080446.xml · derivative · entry 5

VASCONCELLES MICHAEL · CIK 0001734755 · Head of Research and Dev.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 106,875 shares

Expires not disclosed

F6 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock upon settlement for no consideration.

F4 · price: Immediately prior to the effective time of the Merger, all outstanding unvested stock options and unvested restricted stock units became fully vested. At the effective time of the Merger, each stock option and restricted stock unit was canceled and converted into the right to receive an amount in cash equal to the Merger Consideration (or, in the case of stock options, the difference between the Merger Consideration and the applicable per share exercise price), less any applicable withholding taxes.

F9 · derivative.exercise_date: The RSUs vest as to 1/16th of the total award in quarterly installments on February 15, May 15, August 15 and November 15, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

F8 · derivative.expiration_date: RSUs do not expire; they either vest or are canceled prior to the RSU vesting date.

Read SEC document
April 23, 2026 Filed Apr 23, 2026 20:39 UTC Day One Biopharmaceuticals, Inc. DAWN · Entity 51180 Disposition to issuerRestricted Stock Unit (RSU) · Derivative 226,000 Not disclosed Not disclosed
Disclosure

SEC source: 0001734755-26-000005 · form4-04232026_080446.xml · derivative · entry 4

VASCONCELLES MICHAEL · CIK 0001734755 · Head of Research and Dev.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 226,000 shares

Expires not disclosed

F6 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock upon settlement for no consideration.

F4 · price: Immediately prior to the effective time of the Merger, all outstanding unvested stock options and unvested restricted stock units became fully vested. At the effective time of the Merger, each stock option and restricted stock unit was canceled and converted into the right to receive an amount in cash equal to the Merger Consideration (or, in the case of stock options, the difference between the Merger Consideration and the applicable per share exercise price), less any applicable withholding taxes.

F7 · derivative.exercise_date: The RSUs vest as to 25% of the total award on August 15, 2026, and 1/12th of the remaining RSUs vest in quarterly installments thereafter on November 15, February 15, May 15 and August 15, subject to the Reporting Person's provision of service to the Issuer on each RSU vesting date.

F8 · derivative.expiration_date: RSUs do not expire; they either vest or are canceled prior to the RSU vesting date.

Read SEC document
April 23, 2026 Filed Apr 23, 2026 20:39 UTC Day One Biopharmaceuticals, Inc. DAWN · Entity 51180 Disposition to issuerStock Option (right to buy Common Stock) · Derivative 171,000 Not disclosed Strike: $11.16 Not disclosed
Disclosure

SEC source: 0001734755-26-000005 · form4-04232026_080446.xml · derivative · entry 3

VASCONCELLES MICHAEL · CIK 0001734755 · Head of Research and Dev.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 171,000 shares

Expires 2036-01-29

F4 · price: Immediately prior to the effective time of the Merger, all outstanding unvested stock options and unvested restricted stock units became fully vested. At the effective time of the Merger, each stock option and restricted stock unit was canceled and converted into the right to receive an amount in cash equal to the Merger Consideration (or, in the case of stock options, the difference between the Merger Consideration and the applicable per share exercise price), less any applicable withholding taxes.

F5 · derivative.exercise_date: The option vests as to 1/48th of the total shares monthly, commencing February 28, 2026, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

Read SEC document
April 23, 2026 Filed Apr 23, 2026 20:39 UTC Day One Biopharmaceuticals, Inc. DAWN · Entity 51180 Disposition to issuerStock Option (right to buy Common Stock) · Derivative 346,000 Not disclosed Strike: $6.64 Not disclosed
Disclosure

SEC source: 0001734755-26-000005 · form4-04232026_080446.xml · derivative · entry 2

VASCONCELLES MICHAEL · CIK 0001734755 · Head of Research and Dev.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 346,000 shares

Expires 2035-06-15

F4 · price: Immediately prior to the effective time of the Merger, all outstanding unvested stock options and unvested restricted stock units became fully vested. At the effective time of the Merger, each stock option and restricted stock unit was canceled and converted into the right to receive an amount in cash equal to the Merger Consideration (or, in the case of stock options, the difference between the Merger Consideration and the applicable per share exercise price), less any applicable withholding taxes.

F3 · derivative.exercise_date: The option vests as to 1/4th of the total grant on June 16, 2026, and 1/48th of the total grant will vest on each monthly anniversary thereafter, subject to the Reporting Person's provision of service to the Issuer on each option vesting date.

Read SEC document
April 23, 2026 Filed Apr 23, 2026 20:39 UTC Day One Biopharmaceuticals, Inc. DAWN · Entity 51180 Disposition to issuerCommon Stock 4,397 Not disclosed Not disclosed
Disclosure

SEC source: 0001734755-26-000005 · form4-04232026_080446.xml · nonDerivative · entry 1

VASCONCELLES MICHAEL · CIK 0001734755 · Head of Research and Dev.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · price: On March 6, 2026, Servier Pharmaceuticals LLC, a Delaware limited liability company ("Parent"), Servier Detroit Inc., a Delaware corporation and a wholly owned subsidiary of Parent ("Merger Sub"), Day One Biopharmaceuticals, Inc., a Delaware corporation (the "Company"), and Servier S.A.S., a French societe par actions simplifiee, solely as a guarantor, entered into an Agreement and Plan of Merger (the "Merger Agreement"). Pursuant to the Merger Agreement, the Merger Sub merged with and into the Company (such merger and the other transactions contemplated by the Merger Agreement, the "Merger") with the Company surviving the Merger as a wholly owned subsidiary of the Parent.

F2 · price: Upon the closing of the Merger on April 23, 2026, each issued and outstanding share of the Company's Common Stock, par value $0.0001 per share, was either (x) purchased for $21.50 per share (the "Offer Price"), net to the seller in cash, without interest, and subject to applicable withholding taxes, on the terms and conditions set forth in the Merger Agreement, or (y) automatically converted into the right to receive the Offer Price (the "Merger Consideration"), net to the seller in cash, without interest, and subject to applicable withholding taxes, on the terms and conditions set forth in the Merger Agreement.

Read SEC document
February 17, 2026 Filed Feb 18, 2026 22:13 UTC Day One Biopharmaceuticals, Inc. DAWN · Entity 51180 SaleCommon Stock 2,728 $11.60 $31,647.26
Disclosure

SEC source: 0001734755-26-000004 · form4-02182026_100214.xml · nonDerivative · entry 2

VASCONCELLES MICHAEL · CIK 0001734755 · Head of Research and Dev.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,397

F2 · kind: The sale of shares is for the sole purpose of covering the Reporting Person's tax liability with respect to the settlement of RSUs.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold as part of block trades for multiple security holders of the Issuer at prices ranging from $11.195 to $11.8508, 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 herein with regard to the block trade.

Read SEC document
February 15, 2026 Filed Feb 18, 2026 22:13 UTC Day One Biopharmaceuticals, Inc. DAWN · Entity 51180 Exercise / conversionRestricted Stock Unit (RSU) · Derivative 7,125 $0.00 $0.00
Disclosure

SEC source: 0001734755-26-000004 · form4-02182026_100214.xml · derivative · entry 3

VASCONCELLES MICHAEL · CIK 0001734755 · Head of Research and Dev.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 106,875

Underlying: Common Stock · 7,125 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 upon settlement for no consideration.

F4 · derivative.exercise_date: The RSUs vest as to 1/16th of the total award in quarterly installments on February 15, May 15, August 15 and November 15, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

F5 · derivative.expiration_date: RSUs do not expire; they either vest or are canceled prior to the vesting date.

Read SEC document
February 15, 2026 Filed Feb 18, 2026 22:13 UTC Day One Biopharmaceuticals, Inc. DAWN · Entity 51180 Exercise / conversionCommon Stock 7,125 Not disclosed Not disclosed
Disclosure

SEC source: 0001734755-26-000004 · form4-02182026_100214.xml · nonDerivative · entry 1

VASCONCELLES MICHAEL · CIK 0001734755 · Head of Research and Dev.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,125

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 · price: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock upon settlement for no consideration.

Read SEC document
January 30, 2026 Filed Jan 30, 2026 22:18 UTC Day One Biopharmaceuticals, Inc. DAWN · Entity 51180 GrantRestricted Stock Units · Derivative 114,000 $0.00 $0.00
Disclosure

SEC source: 0001734755-26-000002 · form4-01302026_100145.xml · derivative · entry 2

VASCONCELLES MICHAEL · CIK 0001734755 · Head of Research and Dev.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 114,000

Underlying: Common Stock · 114,000 shares

Expires not disclosed

F2 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock upon settlement.

F3 · derivative.exercise_date: The RSUs vest as to 1/16th of the total award in quarterly installments on February 15, May 15, August 15 and November 15, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

F4 · derivative.expiration_date: RSUs do not expire; they either vest or are canceled prior to the vesting date.

Read SEC document
January 30, 2026 Filed Jan 30, 2026 22:18 UTC Day One Biopharmaceuticals, Inc. DAWN · Entity 51180 GrantStock Option (right to buy Common Stock) · Derivative 171,000 $0.00 Strike: $11.16 $0.00
Disclosure

SEC source: 0001734755-26-000002 · form4-01302026_100145.xml · derivative · entry 1

VASCONCELLES MICHAEL · CIK 0001734755 · Head of Research and Dev.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 171,000

Underlying: Common Stock · 171,000 shares

Expires 2036-01-29

F1 · derivative.exercise_date: The option vests as to 1/48th of the total shares monthly, commencing February 28, 2026, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

Read SEC document
June 16, 2025 Filed Jun 18, 2025 23:42 UTC Day One Biopharmaceuticals, Inc. DAWN · Entity 51180 GrantRestricted Stock Unit (RSU) · Derivative 226,000 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0001415889-25-017742 · form4-06182025_110634.xml · derivative · entry 2

VASCONCELLES MICHAEL · CIK 0001734755 · Head of Research and Dev.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 226,000

Underlying: Common Stock · 226,000 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock upon settlement for no consideration.

F3 · derivative.exercise_date: The RSUs vest as to 25% of the total award on August 15, 2026, and 1/12th of the remaining RSUs vest in quarterly installments thereafter on November 15, February 15, May 15 and August 15, subject to the Reporting Person's provision of service to the Issuer on each RSU vesting date.

F4 · derivative.expiration_date: RSUs do not expire; they either vest or are canceled prior to the RSU vesting date..

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June 16, 2025 Filed Jun 18, 2025 23:42 UTC Day One Biopharmaceuticals, Inc. DAWN · Entity 51180 GrantStock Option (right to buy Common Stock) · Derivative 346,000 $0.00 Strike: $6.64 $0.00
Disclosure

SEC source: 0001415889-25-017742 · form4-06182025_110634.xml · derivative · entry 1

VASCONCELLES MICHAEL · CIK 0001734755 · Head of Research and Dev.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 346,000

Underlying: Common Stock · 346,000 shares

Expires 2035-06-15

F1 · derivative.exercise_date: The option vests as to 1/4th of the total grant on June 16, 2026, and 1/48th of the total grant will vest on each monthly anniversary thereafter, subject to the Reporting Person's provision of service to the Issuer on each option vesting date.

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June 05, 2025 Filed Jun 6, 2025 20:05 UTC Kura Oncology, Inc. KURA · Entity 4871 GrantOption to purchase common stock · Derivative 28,500 $0.00 Strike: $6.57 $0.00
Disclosure

SEC source: 0000950170-25-083037 · ownership.xml · derivative · entry 1

VASCONCELLES MICHAEL · CIK 0001734755 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,500

Underlying: Common Stock · 28,500 shares

Expires 2035-06-04

F1 · derivative.exercise_date: This option vests in full on the one year anniversary of the date of grant.

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September 13, 2024 Filed Sep 17, 2024 20:10 UTC Kura Oncology, Inc. KURA · Entity 4871 GrantOption to purchase common stock · Derivative 17,333 $0.00 Strike: $20.88 $0.00
Disclosure

SEC source: 0000950170-24-107272 · ownership.xml · derivative · entry 2

VASCONCELLES MICHAEL · CIK 0001734755 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,333

Underlying: Common Stock · 17,333 shares

Expires 2034-09-12

F2 · derivative.exercise_date: This option vests in full on the one year anniversary of the date of grant.

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September 13, 2024 Filed Sep 17, 2024 20:10 UTC Kura Oncology, Inc. KURA · Entity 4871 GrantOption to purchase common stock · Derivative 52,000 $0.00 Strike: $20.88 $0.00
Disclosure

SEC source: 0000950170-24-107272 · ownership.xml · derivative · entry 1

VASCONCELLES MICHAEL · CIK 0001734755 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,000

Underlying: Common Stock · 52,000 shares

Expires 2034-09-12

F1 · derivative.exercise_date: This option vests in three equal annual installments commencing on the one year anniversary of the date of grant.

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February 12, 2024 Filed Feb 12, 2024 16:35 UTC ImmunoGen, Inc. IMGN · Entity 94428 Disposition to issuerRestricted Stock Unit · Derivative 50,515 Not disclosed Strike: $0.00 Not disclosed
Disclosure

SEC source: 0001104659-24-014692 · tm245865-1_4seq1.xml · derivative · entry 3

VASCONCELLES MICHAEL · CIK 0001734755 · EVP R&D & MEDICAL AFFAIRS

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 50,515 shares

Expires not disclosed

F3 · derivative.exercise_price: Pursuant to the Merger Agreement, at the Effective Time, each restricted stock unit ("RSU") granted on or after the date of the Merger Agreement that was outstanding immediately prior to the Effective Time was converted into a grant of restricted stock unit awards in respect of a number of shares of AbbVie common stock equal to the number of shares of Common Stock underlying such RSU as of immediately prior to the Effective Time multiplied by 0.18, and otherwise with the same terms and conditions that were applicable immediately prior to the Effective Time.

F3 · kind: Pursuant to the Merger Agreement, at the Effective Time, each restricted stock unit ("RSU") granted on or after the date of the Merger Agreement that was outstanding immediately prior to the Effective Time was converted into a grant of restricted stock unit awards in respect of a number of shares of AbbVie common stock equal to the number of shares of Common Stock underlying such RSU as of immediately prior to the Effective Time multiplied by 0.18, and otherwise with the same terms and conditions that were applicable immediately prior to the Effective Time.

F3 · price: Pursuant to the Merger Agreement, at the Effective Time, each restricted stock unit ("RSU") granted on or after the date of the Merger Agreement that was outstanding immediately prior to the Effective Time was converted into a grant of restricted stock unit awards in respect of a number of shares of AbbVie common stock equal to the number of shares of Common Stock underlying such RSU as of immediately prior to the Effective Time multiplied by 0.18, and otherwise with the same terms and conditions that were applicable immediately prior to the Effective Time.

F3 · derivative.exercise_date: Pursuant to the Merger Agreement, at the Effective Time, each restricted stock unit ("RSU") granted on or after the date of the Merger Agreement that was outstanding immediately prior to the Effective Time was converted into a grant of restricted stock unit awards in respect of a number of shares of AbbVie common stock equal to the number of shares of Common Stock underlying such RSU as of immediately prior to the Effective Time multiplied by 0.18, and otherwise with the same terms and conditions that were applicable immediately prior to the Effective Time.

F3 · derivative.expiration_date: Pursuant to the Merger Agreement, at the Effective Time, each restricted stock unit ("RSU") granted on or after the date of the Merger Agreement that was outstanding immediately prior to the Effective Time was converted into a grant of restricted stock unit awards in respect of a number of shares of AbbVie common stock equal to the number of shares of Common Stock underlying such RSU as of immediately prior to the Effective Time multiplied by 0.18, and otherwise with the same terms and conditions that were applicable immediately prior to the Effective Time.

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February 12, 2024 Filed Feb 12, 2024 16:35 UTC ImmunoGen, Inc. IMGN · Entity 94428 Disposition to issuerStock Option (Right to Buy) · Derivative 960,000 Not disclosed Strike: $5.16 Not disclosed
Disclosure

SEC source: 0001104659-24-014692 · tm245865-1_4seq1.xml · derivative · entry 2

VASCONCELLES MICHAEL · CIK 0001734755 · EVP R&D & MEDICAL AFFAIRS

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 960,000 shares

Expires 2032-12-29

F2 · kind: Pursuant to the Merger Agreement, at the Effective Time, each option to purchase shares of Common Stock ("Stock Option") granted prior to the date of the Merger Agreement that was outstanding immediately prior to the Effective Time was canceled and the Reporting Person was entitled to receive (without interest), in consideration of the cancellation of such Stock Option, an amount in cash (less any applicable withholding taxes) equal to (i) the total number of shares of Common Stock subject to such Stock Option immediately prior to the Effective Time, multiplied by (ii) the excess, if any, of the Merger Consideration over the applicable exercise price per share of Common Stock under such Stock Option.

F2 · price: Pursuant to the Merger Agreement, at the Effective Time, each option to purchase shares of Common Stock ("Stock Option") granted prior to the date of the Merger Agreement that was outstanding immediately prior to the Effective Time was canceled and the Reporting Person was entitled to receive (without interest), in consideration of the cancellation of such Stock Option, an amount in cash (less any applicable withholding taxes) equal to (i) the total number of shares of Common Stock subject to such Stock Option immediately prior to the Effective Time, multiplied by (ii) the excess, if any, of the Merger Consideration over the applicable exercise price per share of Common Stock under such Stock Option.

F2 · derivative.exercise_date: Pursuant to the Merger Agreement, at the Effective Time, each option to purchase shares of Common Stock ("Stock Option") granted prior to the date of the Merger Agreement that was outstanding immediately prior to the Effective Time was canceled and the Reporting Person was entitled to receive (without interest), in consideration of the cancellation of such Stock Option, an amount in cash (less any applicable withholding taxes) equal to (i) the total number of shares of Common Stock subject to such Stock Option immediately prior to the Effective Time, multiplied by (ii) the excess, if any, of the Merger Consideration over the applicable exercise price per share of Common Stock under such Stock Option.

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February 12, 2024 Filed Feb 12, 2024 16:35 UTC ImmunoGen, Inc. IMGN · Entity 94428 Disposition to issuerCommon Stock 1,327 Not disclosed Not disclosed
Disclosure

SEC source: 0001104659-24-014692 · tm245865-1_4seq1.xml · nonDerivative · entry 1

VASCONCELLES MICHAEL · CIK 0001734755 · EVP R&D & MEDICAL AFFAIRS

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · kind: This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the "Merger Agreement"), dated November 30, 2023, by and among the Issuer, AbbVie Inc., a Delaware corporation ("AbbVie"), Athene Subsidiary LLC, a Delaware limited liability company and wholly owned subsidiary of AbbVie ("Intermediate Sub"), and Athene Merger Sub Inc., a Massachusetts corporation and wholly owned subsidiary of Intermediate Sub ("Purchaser"), pursuant to which Purchaser merged with and into the Issuer with the Issuer continuing as the surviving corporation (the "Merger"). At the effective time of the Merger (the "Effective Time"), each share of common stock, par value $.01 per share, of the Issuer (the "Common Stock"), that was issued and outstanding immediately prior to the Effective Time was converted into the right to receive an amount in cash equal to $31.26, without interest (the "Merger Consideration").

F1 · price: This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the "Merger Agreement"), dated November 30, 2023, by and among the Issuer, AbbVie Inc., a Delaware corporation ("AbbVie"), Athene Subsidiary LLC, a Delaware limited liability company and wholly owned subsidiary of AbbVie ("Intermediate Sub"), and Athene Merger Sub Inc., a Massachusetts corporation and wholly owned subsidiary of Intermediate Sub ("Purchaser"), pursuant to which Purchaser merged with and into the Issuer with the Issuer continuing as the surviving corporation (the "Merger"). At the effective time of the Merger (the "Effective Time"), each share of common stock, par value $.01 per share, of the Issuer (the "Common Stock"), that was issued and outstanding immediately prior to the Effective Time was converted into the right to receive an amount in cash equal to $31.26, without interest (the "Merger Consideration").

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February 01, 2024 Filed Feb 5, 2024 21:29 UTC ImmunoGen, Inc. IMGN · Entity 94428 GrantRestricted Stock Unit · Derivative 50,515 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0001415889-24-002764 · form4-02062024_020213.xml · derivative · entry 1

VASCONCELLES MICHAEL · CIK 0001734755 · EVP R&D & MEDICAL AFFAIRS

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,515

Underlying: Common Stock · 50,515 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents the contingent right to receive, upon vesting of the RSU, one share of the Issuer's common stock.

F1 · price: Each restricted stock unit ("RSU") represents the contingent right to receive, upon vesting of the RSU, one share of the Issuer's common stock.

F2 · derivative.exercise_date: The RSUs vest over a three-year period, with 33 1/3% of the RSUs vesting on each of the first three anniversaries of the date of grant, subject to continued service through each vesting date.

F2 · derivative.expiration_date: The RSUs vest over a three-year period, with 33 1/3% of the RSUs vesting on each of the first three anniversaries of the date of grant, subject to continued service through each vesting date.

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December 29, 2023 Filed Jan 3, 2024 17:48 UTC ImmunoGen, Inc. IMGN · Entity 94428 GrantCommon Stock 1,327 $16.01 $21,245.27
Disclosure

SEC source: 0001415889-24-000380 · form4-01032024_100131.xml · nonDerivative · entry 1

VASCONCELLES MICHAEL · CIK 0001734755 · EVP R&D & MEDICAL AFFAIRS

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,327

F1 · security: These shares were purchased due to participation by the reporting individual in the ImmunoGen Employee Stock Purchase Plan (the ESPP). It pertains to the ESPP purchase period from July 1, 2023 through December 31, 2023.

F2 · price: In accordance with the ESPP, these shares were purchased based on 85% of the closing price of the issuer's common stock on July 3, 2023.

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December 29, 2022 Filed Jan 3, 2023 17:17 UTC ImmunoGen, Inc. IMGN · Entity 94428 GrantStock Option (Right to Buy) · Derivative 960,000 $0.00 Strike: $5.16 $0.00
Disclosure

SEC source: 0001415889-23-000099 · form4-01032023_100157.xml · derivative · entry 1

VASCONCELLES MICHAEL · CIK 0001734755 · EVP R&D & MEDICAL AFFAIRS

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 960,000

Underlying: Common Stock · 960,000 shares

Expires 2032-12-29

F1 · derivative.exercise_date: These options vest over a four-year period, with 25% of the shares vesting on the one-year anniversary of the date of grant, and thereafter an additional 6.25% of the shares vesting on each succeeding quarterly anniversary of the date of grant.

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August 15, 2022 Filed Aug 17, 2022 12:19 UTC Dianthus Therapeutics, Inc. /DE/ MGTA · Entity 1813 GrantStock Option (Right to Buy) · Derivative 40,000 $0.00 Strike: $1.77 $0.00
Disclosure

SEC source: 0000899243-22-028910 · doc4.xml · derivative · entry 1

VASCONCELLES MICHAEL · CIK 0001734755 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 40,000

Underlying: Common Stock · 40,000 shares

Expires 2032-08-14

F1 · derivative.exercise_date: This option shall vest and become exercisable over three years, with 33% of this option vesting on August 15, 2023, and the remainder vesting in 24 equal monthly installments thereafter.

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March 01, 2019 Filed Apr 11, 2019 20:39 UTC Cogent Biosciences, Inc. UMRX · Entity 3793 GrantStock Option (Right to Buy) · Derivative 61,900 $0.00 Strike: $4.36 $0.00
Disclosure

SEC source: 0001209191-19-024375 · doc4.xml · derivative · entry 1

VASCONCELLES MICHAEL · CIK 0001734755 · Chief Medical Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 61,900

Underlying: Common Stock · 61,900 shares

Expires 2029-03-01

F1 · derivative.exercise_date: 25% of the shares vests on March 1, 2020, and the remaining shares shall vest in 36 equal monthly installments thereafter, subject to the Reporting Persons continuous service with the Issuer.

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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.