SERA Form 144: Proposed sale of Class A Common

SERA reported a notice of proposed sale of Class A Common shares in a Form 144 referencing 06/09/2026.

Rhea-AI Filing Summary

SERA reported a notice of proposed sale of Class A Common shares in a Form 144 referencing 06/09/2026. The filing lists Restricted Stock Unit Vesting as the securities type and shows past sales by Austin Aerts on 03/09/2026, 03/10/2026, and 03/11/2026 with the numeric entries shown in the excerpt.

Insights

Securities Attorney

Form 144 notifies the market of a proposed resale of restricted securities.

The filing lists a proposed sale date of 06/09/2026 for Class A Common tied to Restricted Stock Unit Vesting. Form 144 is a notice required before resale by affiliates or insiders in certain conditions.

The excerpt also lists three past transactions by Austin Aerts on 03/09/2026, 03/10/2026, and 03/11/2026. Cash‑flow treatment and aggregate registration context are not detailed in the provided excerpt; subsequent filings or disclosures would show consummation or proceeds.

Key Figures

Form date: 06/09/2026 Security type: Class A Common Past sale — 03/09/2026 entries: 674; 1323 +2 more

5 metrics

Form date 06/09/2026 Proposed resale date shown on the excerpt

Security type Class A Common Listed under Securities To Be Sold

Past sale — 03/09/2026 entries 674; 1323 Austin Aerts sales row dated 03/09/2026

Past sale — 03/10/2026 entries 6069; 11535 Austin Aerts sales row dated 03/10/2026

Past sale — 03/11/2026 entries 1019; 2080 Austin Aerts sales row dated 03/11/2026

Key Terms

Form 144, Restricted Stock Unit Vesting, Class A Common

3 terms

Form 144 regulatory

"Filer Information | 144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Restricted Stock Unit Vesting financial

"Securities To Be Sold | Restricted Stock Unit Vesting"

Class A Common financial

"Securities Information | Class A Common"

FAQ

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

What does SERA's Form 144 dated 06/09/2026 report?

It reports a proposed resale of Class A Common shares tied to Restricted Stock Unit Vesting with a referenced date of 06/09/2026. The excerpt lists numeric entries and past sales by an individual named Austin Aerts.

Who is named as having sold shares in the past according to the excerpt?

The excerpt lists past sales by Austin Aerts with entries dated 03/09/2026, 03/10/2026, and 03/11/2026. Each row contains the class and numeric values as shown in the filing extract.

What security type is listed on the Form 144 excerpt for SERA?

The filing lists Class A Common and identifies the method as Restricted Stock Unit Vesting. The proposed sale date shown in the excerpt is 06/09/2026.

Do the numbers in the excerpt specify how many shares are being offered on 06/09/2026?

The excerpt shows numeric entries associated with dates and transactions but does not label an explicit aggregate 'offering' total for 06/09/2026. The lines include class and numeric figures visible in the excerpt.

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

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Accepted by SEC EDGAR 06/10/2026 - 04:05 PM EDT 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	0001979974
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	Aerts Austin
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	5440	11324	39158725	06/09/2026	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	06/09/2026	Restricted Stock Unit Vesting	Issuer			5440	06/09/2026	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
Austin Aerts 2749 E. Parleys Way Suite 200 Salt Lake City UT 84109	Class A Common	03/09/2026	674	1323
Austin Aerts 2749 E. Parleys Way Suite 200 Salt Lake City UT 84109	Class A Common	03/10/2026	6069	11535
Austin Aerts 2749 E. Parleys Way Suite 200 Salt Lake City UT 84109	Class A Common	03/11/2026	1019	2080

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	06/10/2026
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/ Austin Aerts
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)