Day One Biopharmaceuticals, Inc.·4

Jan 30, 5:18 PM ET

VASCONCELLES MICHAEL 4

4 · Day One Biopharmaceuticals, Inc. · Filed Jan 30, 2026

Research Summary

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Day One (DAWN) Head of R&D Michael Vasconcelles Receives Equity Awards

What Happened Michael Vasconcelles, Head of Research and Development at Day One Biopharmaceuticals (DAWN), received two equity awards on 2026-01-30: a grant of 171,000 option shares (recorded at $0.00) and 114,000 restricted stock units (RSUs) (recorded at $0.00). These were compensation awards (not open-market purchases or sales) and no cash changed hands. Options and RSUs are treated as derivative awards in the filing.

Key Details

  • Transaction date and price: 2026-01-30; both awards reported at $0.00 per share.
  • Award sizes: 171,000 options; 114,000 RSUs.
  • Shares owned after transaction: Not specified in the provided Form 4 data.
  • Filing timeliness: Report filed on 2026-01-30 (same date as the transactions), indicating a timely filing.
  • Notable footnotes:
    • Option vesting (F1): options vest 1/48th monthly, commencing Feb 28, 2026, subject to continued service.
    • RSU description (F2): each RSU represents a contingent right to one share upon settlement.
    • RSU vesting (F3): RSUs vest 1/16th each quarter on Feb 15, May 15, Aug 15 and Nov 15, subject to continued service.
    • RSU expiry (F4): RSUs do not expire; they either vest or are canceled prior to vesting.

Context These awards are standard equity compensation for an executive and are recorded as derivative grants. Options will convert into actual shares only as they vest according to the monthly schedule; RSUs convert into shares on their quarterly vesting dates. Because these are grants (not purchases or sales), they do not directly indicate a market buy or sell decision by the insider.

Insider Transaction Report

Form 4
Period: 2026-01-30
VASCONCELLES MICHAEL
Head of Research and Dev.
Transactions
  • Award

    Stock Option (right to buy Common Stock)

    [F1]
    2026-01-30+171,000171,000 total
    Exercise: $11.16Exp: 2036-01-29Common Stock (171,000 underlying)
  • Award

    Restricted Stock Units

    [F2][F3][F4]
    2026-01-30+114,000114,000 total
    Common Stock (114,000 underlying)
Footnotes (4)
  • [F1]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.
  • [F2]Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock upon settlement.
  • [F3]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]RSUs do not expire; they either vest or are canceled prior to the vesting date.
Signature
/s/ Charles N. York II, as Attorney-in-Fact|2026-01-30

Documents

1 file
  • 4
    form4-01302026_100145.xmlPrimary