Proposed 30,000-share sale by KYMR insider (NASDAQ: KYMR)

Rhea-AI Filing Summary

KYMR issuer reports a proposed sale of 30,000 common shares. The Form 144 lists the 30,000-share sale as an exercise of stock options on 02/25/2026 to be sold in cash. The filing names Nello Mainolfi and also shows prior sales of 100,000 shares on 12/08/2025 and 30,000 shares on 12/31/2025.

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

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	UBS Financial Services, Inc. 11 Madison Ave 4th Floor New York NY 10010	30000	2742000.00	71949027	02/25/2026	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	02/25/2026	Exercise of stock options	Issuer			30000	02/25/2026	Cash

* 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
Nello Mainolfi 500 NORTH BEACON STREET, 4TH FLOOR WATERTOWN MA 02472	Common	12/08/2025	100000	8917000.00
Nello Mainolfi 500 NORTH BEACON STREET 4TH FLOOR WATERTOWN MA 02472	Common	12/31/2025	30000	2341938.00

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 KYMR's Form 144 report?

It reports a proposed sale of 30,000 common shares via stock option exercise on 02/25/2026. The filing identifies Nello Mainolfi and records prior sales of 100,000 shares on 12/08/2025 and 30,000 shares on 12/31/2025.

Who is the selling party named in the KYMR Form 144?

The filing names Nello Mainolfi as the individual associated with the transactions. The Form shows recent sales linked to that name and lists the proposed 30,000-share transaction dated 02/25/2026 as an option exercise.

What method and consideration are noted for the 30,000 shares?

The 30,000-share transaction is described as an exercise of stock options with cash considered on 02/25/2026. The excerpt explicitly ties the sale method to option exercise and cash proceeds.

Does the Form 144 show recent past sales and amounts?

Yes; the filing lists prior sales of 100,000 shares on 12/08/2025 and 30,000 shares on 12/31/2025. These entries appear under "Securities Sold During The Past 3 Months."

On which exchange are the securities listed in the filing?

The excerpt lists NASDAQ as the exchange for the common shares and associates the proposed sale date 02/25/2026 with that listing. Exchange detail is shown in the securities information section.