SERA Form 144: Insider sales of Class A common

SERA reported insider sale activity via a Form 144 notice.

Rhea-AI Filing Summary

SERA reported insider sale activity via a Form 144 notice. The filing lists sales by Benjamin Jackson of 892 shares on 12/10/2025 and 3,119 shares on 03/09/2026. The filing also lists 1,027 Class A shares tied to restricted stock unit vesting with a 03/11/2026 vesting date.

Insights

Corporate Governance / Insider Transactions

TL;DR: Form 144 discloses discrete insider sales and an RSU vesting event tied to SERA.

The filing identifies two reported dispositions by Benjamin Jackson: 892 shares on 12/10/2025 and 3,119 shares on 03/09/2026. It separately lists 1,027 Class A shares associated with restricted stock unit vesting on 03/11/2026.

These are routine transaction notices required by regulators. Cash‑flow treatment and whether the RSU vesting results in immediate sale are not stated in the excerpt; subsequent filings or trading reports would clarify proceeds and any broker/dealer methods.

FAQ

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

What insider sales does SERA's Form 144 disclose?

The Form 144 shows Benjamin Jackson sold 892 shares on 12/10/2025 and 3,119 shares on 03/09/2026. The filing lists these dispositions as Class A Common share transactions.

Does the filing mention any restricted stock units for SERA?

Yes. The filing lists 1,027 Class A shares tied to restricted stock unit vesting with a vesting date of 03/11/2026. The entry labels this item as related to RSU vesting.

Who is the reporting person in the SERA Form 144?

The reported transactions are by Benjamin Jackson, whose address appears in the filing. The filing attributes the Class A Common share sales and the RSU vesting entries to that reporting person.

Are the proceeds or sale methods described in the filing?

The excerpt does not state proceeds amounts or the methods used to sell shares. The filing lists sale dates and share counts but does not detail cash considerations or broker/dealer distribution methods.

Do the listed RSUs automatically result in sales per the filing?

The filing indicates an RSU vesting event for 1,027 shares on 03/11/2026, but it does not state whether vested shares were sold or retained; disposition details are not provided in the excerpt.

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

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Accepted by SEC EDGAR 03/12/2026 - 08:09 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	0001779964
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	(801)-990-0520
Name of Person for Whose Account the Securities are To Be Sold	Jackson Benjamin
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
Class A Common	Morgan Stanley Smith Barney LLC 1 New York Plaza 38th Floor New York NY 10004	1027	2096	38594793	03/11/2026	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 *
Class A Common	03/11/2026	Restricted Stock Unit Vesting	Issuer			1027	03/11/2026	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Benjamin Jackson 2749 E. Parleys Way Suite 200 Salt Lake City UT 84109	Class A Common	12/10/2025	892	2950
Benjamin Jackson 2749 E. Parleys Way Suite 200 Salt Lake City UT 84109	Class A Common	03/09/2026	3119	6123

144: Remarks and Signature

Remarks	The sale on this form represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. The sale is mandated by the Issuer's election to require the satisfaction of tax withholding obligations to be funded by sell to cover transactions and does not represent a discretionary transaction by the Reporting Person.
Date of Notice	03/12/2026
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/ Benjamin G. Jackson
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)