Korsana Biosciences director proposes $35.4K sale

The securities were acquired through restricted-stock vesting from November 30, 2023, through June 1, 2026.

Rhea-AI Filing Summary

Korsana Biosciences, Inc. (KRSA) reports a proposed sale by director Michael Higgins of 1,107 common shares, with an aggregate market value of $35,424.00 and an approximate sale date of October 22, 2026, through Morgan Stanley Smith Barney LLC. The shares were acquired upon vesting of restricted stock from November 30, 2023, through June 1, 2026. The notice also lists prior sales by Higgins of 1,001 shares for $33,033.00 on September 18, 2026, and 235 shares for $7,599.71 on September 17, 2026.

Key Figures

Common shares proposed for sale: 1,107 shares Aggregate market value: $35,424.00 Shares sold: 1,001 shares +3 more

6 metrics

Common shares proposed for sale 1,107 shares Michael Higgins; approximate sale date October 22, 2026

Aggregate market value $35,424.00 Proposed sale

Shares sold 1,001 shares September 18, 2026

Sale value $33,033.00 Sale on September 18, 2026

Shares sold 235 shares September 17, 2026

Sale value $7,599.71 Sale on September 17, 2026

Key Terms

Rule 144, Restricted Stock, person

3 terms

Rule 144 regulatory

"paragraph (a) of Rule 144"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock financial

"Restricted Stock"

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.

person regulatory

"definition of "person" in paragraph (a) of Rule 144"

FAQ

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

How many KRSA shares does director Michael Higgins propose to sell?

Michael Higgins proposes to sell 1,107 common shares, with an aggregate market value of $35,424.00. Morgan Stanley Smith Barney LLC is listed as the broker, and the approximate sale date is October 22, 2026.

How did Michael Higgins acquire the KRSA shares listed for sale?

The 1,107 common shares were acquired upon the vesting of restricted stock from November 30, 2023, through June 1, 2026.

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

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Available on EDGAR 10/22/2026 - 04:07 PM EDT Accepted by SEC EDGAR 10/22/2026 - 04:06 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	0001478521
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	KORSANA BIOSCIENCES, INC.
SEC File Number	001-38787
Address of Issuer	203 Crescent Street, Bldgs. #3/3A/4, Suite 503, Waltham MASSACHUSETTS 02453
Phone	(781) 516-2325
Name of Person for Whose Account the Securities are To Be Sold	MICHAEL HIGGINS
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	1107	35424.00	45541424	10/22/2026	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	11/30/2023	Restricted Stock	Issuer			1107	11/30/2023	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
MICHAEL HIGGINS 203 Crescent Street, Bldgs. #3/3A/4, Suite 503, Waltham MA 02453	Common	09/18/2026	1001	33033.00
MICHAEL HIGGINS 203 Crescent Street, Bldgs. #3/3A/4, Suite 503, Waltham MA 02453	Common	09/17/2026	235	7599.71

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock during the period of 11/30/2023 through 06/01/2026.
Date of Notice	10/22/2026
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/ Michael J Higgins
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)