[144] Sera Prognostics, Inc. SEC Filing

Rhea-AI Filing Summary

Form 144 notice for SERA (Sera Prognostics, Inc.): The filer reports a proposed sale of 5,263 Class A common shares to be executed through Morgan Stanley Smith Barney LLC on 09/09/2025. The shares were acquired on 09/09/2025 upon Restricted Stock Unit Vesting and payment is listed as Not Applicable. The filing shows 38,061,868 Class A shares outstanding and an aggregate market value for the proposed sale of 16,560. The filer also disclosed three separate Class A common share sales in the past three months: 5,735 shares on 06/09/2025 (gross proceeds 8,224), 945 shares on 06/10/2025 (gross proceeds 1,403), and 5,800 shares on 08/08/2025 (gross proceeds 14,734). The form includes the standard attestation that the filer does not possess undisclosed material adverse information.

Positive

• Transparent disclosure of the proposed sale, acquisition method (RSU vesting), broker name, and exact share counts
• Includes prior sales for the past three months with dates and gross proceeds, aiding investor visibility

Negative

• No officer or director title provided in the filing, so the precise relationship to the issuer is not stated
• Materiality of sales not contextualized (no percentage of insider holdings provided), limiting assessment of impact

Insights

Securities Analyst

TL;DR Insiders filed a Form 144 proposing sale of 5,263 RSU-derived shares; recent insider sales are disclosed for investor transparency.

The filing documents a proposed brokered sale of 5,263 Class A shares acquired via restricted stock unit vesting on the same date, with Morgan Stanley Smith Barney LLC named as broker and an aggregate market value reported as 16,560. The filing also lists three prior sales in the past three months totaling 12,480 shares with combined gross proceeds of 24,361. From a securities-compliance perspective this is a routine Form 144 disclosure that provides transparency about intended insider selling; the filing itself does not contain operational or financial performance information.

Corporate Governance Expert

TL;DR This Form 144 properly discloses an insider sale and prior transactions; it follows Rule 144 reporting requirements.

The document specifies the relationship of the seller to the issuer only by disclosure of the sale and the acquisition method (RSU vesting). It includes the mandatory representation that the signer is not aware of undisclosed material adverse information. The filing lacks any additional corporate governance details such as trading-plan adoption dates or officer/director titles, so governance implications are limited to the disclosed transactions.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	5263	16560	38061868	09/09/2025	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	09/09/2025	Restricted Stock Unit Vesting	Issuer			5263	09/09/2025	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
Austin Aerts 2749 E. Parleys Way Suite 200 Salt Lake City UT 84109	Class A Common	06/09/2025	5735	8224
Austin Aerts 2749 E. Parleys Way Suite 200 Salt Lake City UT 84109	Class A Common	06/10/2025	945	1403
Austin Aerts 2749 E. Parleys Way Suite 200 Salt Lake City UT 84109	Class A Common	08/08/2025	5800	14734

144: Remarks and Signature

Remarks

Date of Notice

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the Form 144 for SERA report?

The form reports a proposed sale of 5,263 Class A common shares to be sold through Morgan Stanley Smith Barney LLC on 09/09/2025, acquired via RSU vesting on 09/09/2025.

How many SERA shares were sold by the filer in the past three months?

The filing discloses three sales totaling 12,480 Class A shares: 5,735 on 06/09/2025, 945 on 06/10/2025, and 5,800 on 08/08/2025.

What broker is handling the proposed SERA sale?

The proposed sale is to be executed through Morgan Stanley Smith Barney LLC at 1 New York Plaza, 38th Floor, New York, NY 10004.

What acquisition method is listed for the shares to be sold?

The shares were acquired through Restricted Stock Unit Vesting on 09/09/2025.

Does the filing state whether the filer knows any undisclosed material information?

Yes. The signer represents they do not know any material adverse information about the issuer that has not been publicly disclosed.