ABOS Form 144: Insider filing lists 12,800 shares

ABOS reported a Form 144 notice for insider sales.

Rhea-AI Filing Summary

ABOS reported a Form 144 notice for insider sales. The filing lists 12,800 shares of restricted common stock to be sold and shows 6,460 shares sold on 06/15/2026 for $15,148.70. The broker listed is Morgan Stanley Smith Barney LLC and the filing references NASDAQ.

Key Figures

Proposed shares to be sold: 12,800 shares Shares sold in past 3 months: 6,460 shares Proceeds reported for recent sale: $15,148.70 +2 more

5 metrics

Proposed shares to be sold 12,800 shares listed as "Securities To Be Sold" (06/03/2026)

Shares sold in past 3 months 6,460 shares sold on 06/15/2026 (DERRELL PORTER)

Proceeds reported for recent sale $15,148.70 amount shown for the 06/15/2026 sale

Filing reference date 06/16/2026 date shown near security/filing header

Broker Morgan Stanley Smith Barney LLC listed as the broker on the Form 144 excerpt

Key Terms

Restricted Stock, Form 144, Securities To Be Sold

3 terms

Restricted Stock financial

"Common | 06/03/2026 | Restricted Stock | Issuer"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

Form 144 regulatory

"CONTENT METADATA: "form_type": "144""

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.

Securities To Be Sold regulatory

"144: Securities To Be Sold"

FAQ

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

What does ABOS's Form 144 report?

The Form 144 reports a proposed sale of 12,800 shares of restricted common stock and a prior sale of 6,460 shares on 06/15/2026 for $15,148.70. It names Morgan Stanley Smith Barney LLC as the broker.

Who is the broker handling the reported transactions for ABOS?

The filing lists Morgan Stanley Smith Barney LLC at 1 New York Plaza as the broker handling the transactions. The broker address and firm are shown on the Form 144 excerpt.

How many ABOS shares were sold in the past three months?

The excerpt shows 6,460 shares sold during the past three months, dated 06/15/2026, with a reported proceeds figure of $15,148.70. No further sale details are provided in the excerpt.

What type of shares are listed on ABOS's Form 144?

The Form 144 identifies the securities as Restricted Stock of ABOS common stock. The filing indicates these are issuer-restricted shares and lists proposed and recent sale quantities.

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

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Accepted by SEC EDGAR 06/16/2026 - 05:03 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	0001706400
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	ACUMEN PHARMACEUTICALS, INC.
SEC File Number	001-40551
Address of Issuer	1210-1220 Washington Street, Suite 210 Newton, MASSACHUSETTS 02465
Phone	(617) 344-4190
Name of Person for Whose Account the Securities are To Be Sold	DERRELL PORTER
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	Director

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	12800	29767.68	72227580	06/16/2026	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	06/03/2026	Restricted Stock	Issuer			12800	06/03/2026	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
DERRELL PORTER 1210-1220 Washington Street, Suite 210 Newton, MA 02465	Common	06/15/2026	6460	15148.70

144: Remarks and Signature

Remarks
Date of Notice	06/16/2026
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/ Derrell Porter
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)