Merrill Lynch to sell 24,000 KYMR shares (NASDAQ: KYMR) — Form 144 filing

Rhea-AI Filing Summary

KYMR submitted a Form 144 notice reporting an intended sale of 24,000 shares of Common Stock by Merrill Lynch, with the filing dated 04/14/2026. The notice lists two stock option items of 12,000 shares each and shows recent dispositions by Atlas Venture entities on 03/02/2026.

Key Figures

Registered/To be sold: 24,000 shares Stock option item: 12,000 shares Stock option item: 12,000 shares +4 more

7 metrics

Registered/To be sold 24,000 shares Common Stock row, 04/14/2026

Stock option item 12,000 shares Stock Option dated 06/15/2022, listed 04/14/2026

Stock option item 12,000 shares Stock Option dated 08/20/2020, listed 04/14/2026

Recent sale — Atlas Venture Fund X 71,814 shares Disposition dated 03/02/2026

Recent sale — Atlas Venture Opportunity Fund I 10,052 shares Disposition dated 03/02/2026

Beneficially owned / context 2,124,720 Number adjacent to Common Stock row, 04/14/2026

Context — aggregate/outstanding 81,642,394 Number adjacent to Common Stock row, 04/14/2026

Key Terms

Form 144, Stock Option, Common Stock, Merrill Lynch

4 terms

Form 144 regulatory

"144: Securities To Be Sold"

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.

Stock Option financial

"Stock Option | Issuer | 12000 | 04/14/2026"

A stock option is a contract that gives you the right to buy or sell a company's stock at a specific price within a certain time frame. People use them to potentially make money if the stock's price moves favorably or to protect against losses. It's like holding a coupon that can be used to buy or sell stock at a set price later on.

Common Stock financial

"Common Stock | Merrill Lynch 555 California Street"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Merrill Lynch other

"Common Stock | Merrill Lynch 555 California Street 18th Floor San Francisco"

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 Stock	Merrill Lynch 555 California Street 18th Floor San Francisco CA 94104	24000	2124720	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 Stock	06/15/2022	Stock Option	Issuer			12000	04/14/2026	Cash
Common Stock	08/20/2020	Stock Option	Issuer			12000	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
Atlas Venture Fund X, L.P. 300 Technology Sq Ste 8 Cambridge MA 02139	Common	03/02/2026	71814	6472675
Atlas Venture Opportunity Fund I, L.P. 300 Technology Sq Ste 8 Cambridge MA 02139	Common	03/02/2026	10052	905998

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 say about the number of shares to be sold?

The filing reports an intended sale of 24,000 shares. It lists this amount alongside Merrill Lynch as the broker and the filing date 04/14/2026, with related stock-option entries of two 12,000-share items.

Who is listed as the broker or intermediary in KYMR's Form 144?

Merrill Lynch is listed as the intermediary. The entry shows Merrill Lynch, 555 California Street, San Francisco, tied to the Common Stock row reporting 24,000 shares and the filing date 04/14/2026.

Does KYMR's Form 144 show recent sales by major holders?

Yes. Atlas Venture entities reported recent sales on 03/02/2026. The filing lists Atlas Venture Fund X, L.P. selling 71,814 shares and Atlas Venture Opportunity Fund I, L.P. selling 10,052 shares on that date.

What outstanding/share context is included in the Form 144 for KYMR?

The filing includes numeric share-context lines. It shows figures such as 2,124,720 and 81,642,394 adjacent to the Common Stock row with the date 04/14/2026 in the provided excerpt.

Are the securities to be sold linked to options in KYMR's filing?

Yes. Two stock-option entries are shown. The excerpt lists Stock Option items dated 06/15/2022 and 08/20/2020, each with 12,000 shares and the date 04/14/2026 next to Cash/Common Stock descriptors.