[144] Sera Prognostics, Inc. SEC Filing

Rhea-AI Filing Summary

Form 144 notice for SERA (Sera Prognostics, Inc.) reporting proposed sale of common stock by Robert Gardner Harrison. The filing lists 6,000 shares to be sold through Morgan Stanley Smith Barney LLC with an aggregate market value of $13,500.00 and an approximate sale date of 08/20/2025. The shares were acquired as Restricted Stock Units on 02/06/2024. The issuer's outstanding shares are shown as 37,094,109. The filing also discloses recent sales by the same person: 5,962 shares sold on 08/08/2025 for $15,143.48 and 667 shares sold on 06/10/2025 for $987.16. The notice includes the required representation that the seller is not aware of undisclosed material adverse information about the issuer.

Positive

• Clear disclosure of the proposed sale amount, acquisition date, and nature (Restricted Stock Units)
• Broker identified (Morgan Stanley Smith Barney LLC), indicating use of an established intermediary
• Recent prior sales disclosed, providing historical transparency about insider transactions
• Seller's representation that no undisclosed material adverse information is known

Negative

• Insider selling activity is reported (multiple sales), which may be interpreted unfavorably by some investors
• Aggregate market value of the proposed sale ($13,500.00) is small relative to total outstanding shares, offering limited insight into insider intentions

Insights

Securities Analyst

TL;DR: Routine insider sale of RSUs via broker; disclosure provides transaction detail but appears non-material to company operations.

The filing documents a proposed sale of 6,000 common shares acquired as restricted stock units on 02/06/2024, to be executed through Morgan Stanley Smith Barney LLC with an indicated aggregate market value of $13,500.00 and an approximate sale date of 08/20/2025. Recent historical disposals by the same individual are disclosed for 5,962 and 667 shares on 08/08/2025 and 06/10/2025 respectively, showing the filer has transacted shares in the recent past. This is a standard Rule 144 disclosure; it provides transparency on insider liquidity but does not, by itself, convey operational or financial changes at the issuer.

Corporate Governance Expert

TL;DR: Proper compliance with Rule 144 reporting; signature representation of no undisclosed material adverse information is included.

The form records the seller's representation that no material non-public adverse information is known, and notes the shares originate from RSUs granted by the issuer. The use of an established brokerage and explicit dates/amounts aligns with disclosure expectations under Rule 144. From a governance perspective, the filing documents insider liquidity but contains no indications of unusual arrangements or deviations from required disclosure protocols.

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
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	6000	13500.00	37094109	08/20/2025	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 *
Common	02/06/2024	Restricted Stock Units	Issuer			6000	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
ROBERT GARDNER HARRISON 2749 East Parleys Way, Suite 200 Salt Lake City UT 84109	Common	08/08/2025	5962	15143.48
ROBERT GARDNER HARRISON 2749 East Parleys Way, Suite 200 Salt Lake City UT 84109	Common	06/10/2025	667	987.16

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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 notice reports a proposed sale of 6,000 common shares by Robert Gardner Harrison, acquired as RSUs on 02/06/2024, with an aggregate market value of $13,500.00 and an approximate sale date of 08/20/2025.

Through which broker will the SERA shares be sold?

The filing specifies Morgan Stanley Smith Barney LLC as the broker handling the proposed sale.

Has the seller transacted SERA shares recently?

Yes; the filing discloses prior sales by the same person: 5,962 shares sold on 08/08/2025 for $15,143.48 and 667 shares sold on 06/10/2025 for $987.16.

How many SERA shares are outstanding per the filing?

The filing lists 37,094,109 shares outstanding for the issuer.

What was the acquisition method for the shares to be sold?

The 6,000 shares were acquired as Restricted Stock Units on 02/06/2024.