STOCK TITAN

Servier acquisition of Day One (NASDAQ: DAWN) cashes out CCO’s full equity stake

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

Rhea-AI Filing Summary

Day One Biopharmaceuticals, Inc. has been acquired by Servier under a merger that closed on April 23, 2026, with common stockholders receiving $21.50 per share in cash.

As part of the closing, Chief Commercial Officer Lauren Merendino disposed of 60,157 shares of common stock and all outstanding equity awards, including multiple restricted stock unit and stock option grants, through issuer dispositions. These awards were canceled and converted into cash based on the $21.50 per-share Merger Consideration, or, for options, the cash value of the spread over their exercise prices, less applicable taxes. Following these transactions, the filing shows Merendino with no remaining common shares or derivative equity holdings in the company.

Positive

  • None.

Negative

  • None.

Insights

Officer equity fully cashed out in Servier’s all-cash acquisition.

The filing shows Day One’s Chief Commercial Officer disposing of all common shares, RSUs, and stock options in connection with Servier’s cash acquisition at $21.50 per share. Code D indicates issuer dispositions, not open-market selling.

Footnotes explain that at the merger’s effective time, all unvested options and RSUs vested, then were canceled for cash equal to the merger consideration (or option spread). With total shares and derivatives reported as zero afterward, this looks like a standard change-of-control cash-out of management equity rather than a discretionary trade.

Insider Merendino Lauren
Role Chief Commercial Officer
Type Security Shares Price Value
Disposition Stock Option (right to buy Common Stock) 330,200 $0.00 --
Disposition Stock Option (right to buy Common Stock) 90,000 $0.00 --
Disposition Stock Option (right to buy Common Stock) 90,000 $0.00 --
Disposition Stock Option (right to buy Common Stock) 110,000 $0.00 --
Disposition Restricted Stock Unit (RSU) 18,978 $0.00 --
Disposition Restricted Stock Unit (RSU) 25,816 $0.00 --
Disposition Restricted Stock Unit (RSU) 40,565 $0.00 --
Disposition Restricted Stock Unit (RSU) 69,375 $0.00 --
Disposition Common Stock 60,157 $0.00 --
Holdings After Transaction: Stock Option (right to buy Common Stock) — 0 shares (Direct, null); Restricted Stock Unit (RSU) — 0 shares (Direct, null); Common Stock — 0 shares (Direct, null)
Footnotes (1)
  1. 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. 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. The option vests as to 25% of the total shares on June 12, 2024 and then 2.0833% of the total shares vest monthly thereafter, with 100% of the total shares vested on June 12, 2027, subject to the Reporting Person's provision of service to the Issuer on each vesting date. 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. The option vests as to 1/48th of the total shares monthly, commencing February 5, 2024, subject to the Reporting Person's provision of service to the Issuer on each vesting date. The option vests as to 1/48th of the total shares monthly, commencing February 15, 2025, subject to the Reporting Person's provision of service to the Issuer on each vesting 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. Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock upon settlement for no consideration. The RSUs vested as to 1/4th of the total award on August 15, 2024, and the remaining 3/4 of the award vests in 12 substantially equal 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 vesting date. RSUs do not expire; they either vest or are canceled prior to the vesting 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.
Merger cash price $21.50 per share Cash consideration per common share in Servier merger
Common stock disposed 60,157 shares Shares of Day One common stock disposed to issuer at merger closing
RSU grant canceled 69,375 units Restricted Stock Units linked to common stock converted to cash
Largest option grant canceled 330,200 options at $8.99 Stock options with $8.99 exercise price converted to cash spread
Additional option grant 110,000 options at $11.16 Stock options canceled and settled in cash on merger closing
Total dispose transactions 9 transactions All reported as issuer dispositions on April 23, 2026
Agreement and Plan of Merger regulatory
"entered into an Agreement and Plan of Merger (the "Merger Agreement")."
An Agreement and Plan of Merger is a formal document where two companies agree to combine into one, outlining how the process will happen. It’s like a step-by-step plan for merging, and it matters because it shows both sides have agreed on the details before the official transition takes place.
Merger Consideration financial
"automatically converted into the right to receive the Offer Price (the "Merger Consideration"),"
Merger consideration is the total payment a company or buyer offers to shareholders of a target company in exchange for combining the two businesses, and can include cash, shares in the surviving company, debt assumption, or a mix of these. Investors care because the form and amount affect the deal’s value, tax consequences, immediate cash received versus future ownership, and the risk and upside of holding new shares — similar to choosing between cash now or stock that could grow later.
Restricted Stock Unit ("RSU") financial
"Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share"
Offer Price financial
"purchased for $21.50 per share (the "Offer Price"), net to the seller in cash,"
The offer price is the amount per share that a company or underwriter sets when selling new stock or bonds to investors, like the price tag on an item in a store. It matters because it determines how much investors must pay, shapes the initial market value of the security, and influences whether demand will be strong or weak — which affects early trading performance and potential returns.
Disposition to issuer financial
"transaction_code_description": "Disposition to issuer""
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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

(Last)(First)(Middle)
1800 SIERRA POINT PARKWAY, SUITE 200

(Street)
BRISBANE CALIFORNIA 94005

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Day One Biopharmaceuticals, Inc. [ DAWN ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Commercial Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
04/23/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock04/23/2026D60,157D(1)(2)0D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option (right to buy Common Stock)$8.9904/23/2026D330,200 (3)06/11/2033Common Stock330,200(4)0D
Stock Option (right to buy Common Stock)$8.9904/23/2026D90,000 (5)01/04/2034Common Stock90,000(4)0D
Stock Option (right to buy Common Stock)$8.9904/23/2026D90,000 (6)01/14/2035Common Stock90,000(4)0D
Stock Option (right to buy Common Stock)$11.1604/23/2026D110,000 (7)01/29/2036Common Stock110,000(4)0D
Restricted Stock Unit (RSU)(8)04/23/2026D18,978 (9) (10)Common Stock18,978(4)0D
Restricted Stock Unit (RSU)(8)04/23/2026D25,816 (11) (10)Common Stock25,816(4)0D
Restricted Stock Unit (RSU)(8)04/23/2026D40,565 (11) (10)Common Stock40,565(4)0D
Restricted Stock Unit (RSU)(8)04/23/2026D69,375 (11) (10)Common Stock69,375(4)0D
Explanation of Responses:
1. 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.
2. 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.
3. The option vests as to 25% of the total shares on June 12, 2024 and then 2.0833% of the total shares vest monthly thereafter, with 100% of the total shares vested on June 12, 2027, subject to the Reporting Person's provision of service to the Issuer on each vesting date.
4. 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.
5. The option vests as to 1/48th of the total shares monthly, commencing February 5, 2024, subject to the Reporting Person's provision of service to the Issuer on each vesting date.
6. The option vests as to 1/48th of the total shares monthly, commencing February 15, 2025, subject to the Reporting Person's provision of service to the Issuer on each vesting date.
7. 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.
8. Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock upon settlement for no consideration.
9. The RSUs vested as to 1/4th of the total award on August 15, 2024, and the remaining 3/4 of the award vests in 12 substantially equal 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 vesting date.
10. RSUs do not expire; they either vest or are canceled prior to the vesting date.
11. 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.
/s/ Charles N. York II, as Attorney-in-Fact04/23/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What happened to Day One Biopharmaceuticals (DAWN) in this Form 4 filing?

Day One Biopharmaceuticals was acquired by Servier, and the merger closed on April 23, 2026. All common shares were effectively bought out or converted into cash at a fixed price per share under the merger agreement’s terms.

How many Day One (DAWN) shares did Lauren Merendino dispose of in the merger?

Lauren Merendino disposed of 60,157 shares of common stock, recorded as a disposition to the issuer. This occurred as part of the closing of Servier’s acquisition of Day One, rather than through open-market sales.

What happened to Lauren Merendino’s RSUs and stock options in the DAWN merger?

All outstanding RSUs and stock options became fully vested immediately before the merger and were then canceled. Each award was converted into cash based on the $21.50 per-share Merger Consideration, or, for options, the cash value of the spread over its exercise price.

What cash consideration did Day One Biopharmaceuticals (DAWN) shareholders receive in the Servier deal?

Each issued and outstanding share of Day One common stock was either purchased or converted into the right to receive $21.50 per share in cash. This amount, called the Offer Price or Merger Consideration, was paid net of applicable withholding taxes.

Does Lauren Merendino still hold Day One (DAWN) equity after the Servier merger?

No. The Form 4 reports zero common shares and zero derivative securities owned following the transactions. Her prior stock, RSUs, and options were fully vested, canceled, and paid out in cash at closing, leaving no remaining equity position in the company.