KYMR (NASDAQ: KYMR) insider sells 5,251 shares; prior 10b5-1 sales noted

Rhea-AI Filing Summary

KYMR insider sale disclosed under Rule 144. The filing reports an intended sale of 5,251 shares of Common Stock on 04/14/2026 via an exercise-of-stock-options cash transaction. The filing also lists multiple prior 10b5-1 sales in March and April 2026, including 91,250 shares sold on 03/23/2026 for $7,063,733.26.

Key Figures

Planned sale: 5,251 shares 10b5-1 sale (largest listed): 91,250 shares 10b5-1 sale proceeds: $7,063,733.26 +2 more

5 metrics

Planned sale 5,251 shares Intended sale on 04/14/2026 via exercise of stock options

10b5-1 sale (largest listed) 91,250 shares Sale on 03/23/2026 for $7,063,733.26

10b5-1 sale proceeds $7,063,733.26 Proceeds from 91,250-share sale on 03/23/2026

Other 10b5-1 sales 24,727 shares; 25,758 shares; 14,640 shares Sales on 03/25/2026, 03/11/2026, and 04/01/2026 respectively

Broker Morgan Stanley Smith Barney LLC Listed intermediary on the filing

Key Terms

Rule 144, 10b5-1 Sales, Exercise of Stock Options

3 terms

Rule 144 regulatory

"Filer Information | Securities To Be Sold | Common | 04/14/2026"

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.

10b5-1 Sales regulatory

"Securities Sold During The Past 3 Months | 10b5-1 Sales for JEREMY CHADWICK"

Exercise of Stock Options financial

"Securities To Be Sold | Exercise of Stock Options | 04/14/2026"

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	5251	464871.03	81642394	04/14/2026	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	04/14/2026	Exercise of Stock Options	Issuer			5251	04/14/2026	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
10b5-1 Sales for JEREMY CHADWICK 500 North Beacon Street, 4th Floor Watertown MA 02472	Common	04/01/2026	14640	1251166.61
10b5-1 Sales for JEREMY CHADWICK 500 North Beacon Street, 4th Floor Watertown MA 02472	Common	03/31/2026	7600	648881.92
10b5-1 Sales for JEREMY CHADWICK 500 North Beacon Street, 4th Floor Watertown MA 02472	Common	03/25/2026	24727	1984554.44
10b5-1 Sales for JEREMY CHADWICK 500 North Beacon Street, 4th Floor Watertown MA 02472	Common	03/23/2026	91250	7063733.26
10b5-1 Sales for JEREMY CHADWICK 500 North Beacon Street, 4th Floor Watertown MA 02472	Common	03/11/2026	25758	2145673.70
JEREMY CHADWICK 500 North Beacon Street, 4th Floor Watertown MA 02472	Common	03/04/2026	3919	334272.49
JEREMY CHADWICK 500 North Beacon Street, 4th Floor Watertown MA 02472	Common	03/02/2026	2039	181321.64

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 disclose about the 04/14/2026 transaction?

The Form 144 discloses an intended sale of 5,251 shares of Common Stock on 04/14/2026, described as an exercise of stock options with cash used for the transaction.

How much stock did insiders sell under 10b5-1 plans for KYMR in March–April 2026?

The filing lists multiple prior 10b5-1 sales, including 91,250 shares on 03/23/2026 for $7,063,733.26 and other sales of 24,727, 25,758, and 14,640 shares earlier in the period.

Does the Form 144 state who is selling KYMR shares?

The filing names an intermediary and references 10b5-1 sales executed for Jeremy Chadwick and lists transactions executed through Morgan Stanley Smith Barney LLC at the New York Plaza address.

Are the proceeds or price per share for the 04/14/2026 sale shown in the filing?

The filing lists dollar proceeds for prior 10b5-1 trades but does not attach a per-share proceeds figure to the 5,251-share 04/14/2026 exercise in the provided excerpt.

What is a 10b5-1 sale as referenced in the KYMR filing?

A 10b5-1 sale is a prearranged trading plan allowing scheduled sales by insiders; the filing shows multiple such sales executed for the reporting person in March and April 2026.