Servier deal cancels Day One (NASDAQ: DAWN) COO’s stock and options
Filing Impact
Filing Sentiment
Form Type
4
Rhea-AI Filing Summary
Day One Biopharmaceuticals’ COO and CFO, Charles N. York II, reported the cancellation of his equity due to the company’s merger with Servier. On April 23, 2026, each share of Day One common stock was cashed out at $21.50 per share under the merger terms.
York disposed of 312,025 shares of common stock in an issuer disposition, leaving him with zero reported common shares. His unvested stock options and restricted stock units first became fully vested and were then canceled at the merger’s effective time in exchange for cash equal to the merger consideration (or the merger price minus the option exercise price), less applicable taxes.
The filing shows multiple cancellations of RSUs and stock options covering hundreds of thousands of underlying shares, with all related derivative positions reported as 0 remaining after the merger.
Positive
- None.
Negative
- None.
Insider Trade Summary
11 transactions reported
Mixed
11 txns
Insider
York Charles N II
Role
COO and CFO
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Disposition | Stock Option (right to buy Common Stock) | 497,667 | $0.00 | -- |
| Disposition | Stock Option (right to buy Common Stock) | 151,000 | $0.00 | -- |
| Disposition | Stock Option (right to buy Common Stock) | 116,000 | $0.00 | -- |
| Disposition | Stock Option (right to buy Common Stock) | 162,000 | $0.00 | -- |
| Disposition | Stock Option (right to buy Common Stock) | 162,000 | $0.00 | -- |
| Disposition | Stock Option (right to buy Common Stock) | 188,000 | $0.00 | -- |
| Disposition | Restricted Stock Unit (RSU) | 6,750 | $0.00 | -- |
| Disposition | Restricted Stock Unit (RSU) | 46,375 | $0.00 | -- |
| Disposition | Restricted Stock Unit (RSU) | 72,875 | $0.00 | -- |
| Disposition | Restricted Stock Unit (RSU) | 118,125 | $0.00 | -- |
| Disposition | Common Stock | 312,025 | $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)
- 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 options are fully vested. 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 2.0833% of the total shares monthly, with 100% of the total shares vested on January 18, 2026, 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 17, 2023, 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 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 will 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. RSUs do not expire; they either vest or are canceled prior to the RSU Vesting Date. The RSUs will 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.
Key Figures
Merger cash price per share: $21.50 per share
Common shares disposed: 312,025 shares
Largest option block canceled: 497,667 options
+4 more
7 metrics
Merger cash price per share
$21.50 per share
Cash consideration for each common share in the merger
Common shares disposed
312,025 shares
Common Stock issuer disposition reported for Charles N. York II
Largest option block canceled
497,667 options
Stock option for Common Stock with $8.99 exercise price, canceled
Option exercise price
$11.16 per share
Exercise price on one fully vested stock option grant
Option exercise price
$8.99 per share
Exercise price on several stock option grants canceled at merger
Total dispositions
11 transactions
All classified as dispositions to issuer on April 23, 2026
Post‑transaction holdings
0 shares/options/RSUs
Total shares following each reported transaction
Key Terms
Agreement and Plan of Merger, Merger Consideration, Restricted Stock Unit ("RSU"), stock option, +2 more
6 terms
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"
stock option financial
"all outstanding unvested stock options and unvested restricted stock units became fully vested."
A stock option is a contract that gives you the right to buy or sell a company's stock at a specific price within a certain time frame. People use them to potentially make money if the stock's price moves favorably or to protect against losses. It's like holding a coupon that can be used to buy or sell stock at a set price later on.
issuer disposition financial
"transaction_action": "issuer disposition""
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.
