Form 144: Robert Harrison to Sell 2,000 SERA Shares

Robert Harrison filed a Form 144 reporting a proposed sale of 2,000 Common shares (listed as Restricted Stock Units) through Morgan Stanley Smith Barney LLC.

Rhea-AI Filing Summary

Robert Harrison filed a Form 144 reporting a proposed sale of 2,000 Common shares (listed as Restricted Stock Units) through Morgan Stanley Smith Barney LLC. The filing also lists recent 10b5-1 sales: 2,000 shares on 01/27/2026, 2,000 on 12/30/2025, 616 on 12/10/2025, and 2,000 on 12/02/2025.

Insights

Equity Transactions Analyst

Insider filed a resale notice and disclosed multiple recent 10b5-1 sales.

The filing lists a proposed sale of 2,000 Common shares described as Restricted Stock Units, submitted through Morgan Stanley Smith Barney LLC. Multiple executed 10b5-1 sales are recorded on 12/02/2025, 12/10/2025, 12/30/2025, and 01/27/2026

Cash‑flow treatment and any issuer proceeds are not detailed in the excerpt; subsequent filings or broker confirmations would state settlement amounts and receiving parties.

FAQ

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

What did the Form 144 for SERA disclose?

The Form 144 discloses a proposed sale of 2,000 Common shares described as Restricted Stock Units. It also lists four recent 10b5-1 sales dated 12/02/2025 to 01/27/2026.

Who is the reporting person on the SERA Form 144?

Robert Harrison is identified as the reporting person; the broker listed is Morgan Stanley Smith Barney LLC at 1 New York Plaza, 8th Floor, New York, NY.

What sizes and dates are the recent 10b5-1 sales shown?

The excerpt shows executed sales of 2,000 shares on 12/02/2025, 616 shares on 12/10/2025, 2,000 shares on 12/30/2025, and 2,000 shares on 01/27/2026.

Does the Form 144 state who receives the sale proceeds for SERA?

The provided excerpt does not specify proceeds recipients or use of proceeds. The filing lists the broker and the securities but does not state whether the issuer or selling holder receives proceeds.

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

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Accepted by SEC EDGAR 02/24/2026 - 04:28 PM 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	0001421563
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	SERA PROGNOSTICS, INC.
SEC File Number	001-40606
Address of Issuer	2749 East Parleys Way, Suite 200 Salt Lake City UTAH 84109
Phone	8019900520
Name of Person for Whose Account the Securities are To Be Sold	ROBERT HARRISON
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

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	2000	4900.00	37627034	02/24/2026	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	02/06/2024	Restricted Stock Units	Issuer			2000	02/06/2024	N/A

* 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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for ROBERT HARRISON 2749 East Parleys Way, Suite 200 Salt Lake City UT 84109	Common	01/27/2026	2000	5942.00
10b5-1 Sales for ROBERT HARRISON 2749 East Parleys Way, Suite 200 Salt Lake City UT 84109	Common	12/30/2025	2000	6002.60
ROBERT HARRISON 2749 East Parleys Way, Suite 200 Salt Lake City UT 84109	Common	12/10/2025	616	2038.96
10b5-1 Sales for ROBERT HARRISON 2749 East Parleys Way, Suite 200 Salt Lake City UT 84109	Common	12/02/2025	2000	5862.80

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units during the period of 02/06/2024 through 08/06/2024.
Date of Notice	02/24/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/21/2025
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/ Robert G. Harrison
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)