Shareholder plans Rule 144 sale of 15,459 shares

A holder of DAWN common stock has filed a notice of proposed sale under Rule 144.

Rhea-AI Filing Summary

A holder of DAWN common stock has filed a notice of proposed sale under Rule 144. The filing covers 15,459 common shares, to be sold through Morgan Stanley Smith Barney LLC with an aggregate market value of $179,338.31.

The shares are part of a larger base of 102,675,502 shares outstanding and were acquired as restricted stock from the issuer on 02/15/2026. The planned sale date is approximately 02/17/2026 on the NASDAQ exchange.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the DAWN Rule 144 filing disclose?

The filing discloses a planned Rule 144 sale of 15,459 common shares of DAWN. These shares, valued at $179,338.31, are to be sold through Morgan Stanley Smith Barney LLC on or around 02/17/2026 on the NASDAQ market.

How many DAWN shares are being proposed for sale under Rule 144?

The notice covers a proposed sale of 15,459 common shares of DAWN. The aggregate market value of this block is listed as $179,338.31, and the transaction is expected to occur via Morgan Stanley Smith Barney LLC’s Executive Financial Services unit.

How large is the planned DAWN sale compared with shares outstanding?

The proposed 15,459-share sale is small relative to 102,675,502 shares outstanding. This means the sale represents only a very small fraction of the company’s total common stock base as disclosed in the filing data.

When and how were the DAWN shares to be sold acquired?

The filing states the 15,459 shares were acquired on 02/15/2026 as restricted stock from the issuer. The nature of payment is described as “Not Applicable,” indicating no separate cash payment terms were detailed for this restricted stock grant.

Who is the broker for the DAWN Rule 144 share sale?

The proposed sale will be executed through Morgan Stanley Smith Barney LLC Executive Financial Services. The broker’s listed address is 1 New York Plaza, 8th Floor, New York, NY 10004, and the intended trading venue for the shares is the NASDAQ exchange.

What trading date is indicated for the DAWN Rule 144 transaction?

The filing gives an approximate sale date of 02/17/2026 for the 15,459 DAWN common shares. This date reflects when the holder expects to begin selling the registered shares through Morgan Stanley Smith Barney LLC on the NASDAQ market.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 02/17/2026 - 06:21 PM EST Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001863107
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	DAY ONE BIOPHARMACEUTICALS, INC.
SEC File Number	001-40431
Address of Issuer	1800 Sierra Point Parkway, Suite 200 Brisbane CALIFORNIA 94005
Phone	(650) 484-0899
Name of Person for Whose Account the Securities are To Be Sold	JEREMY BENDER
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	15459	179338.31	102675502	02/17/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	02/15/2026	Restricted Stock	Issuer			15459	02/15/2026	Not Applicable

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	02/17/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Jeremy Bender
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)