KYMR (NASDAQ) Form 144: Holders file to sell 11,741 shares on 06/17/2026

Rhea-AI Filing Summary

KYMR submitted a Form 144 reporting a proposed sale of 11,741 shares of Common Stock, dated 06/17/2026. The filing lists recent open-market dispositions by holders in April 2026.

The notice shows multiple prior sales, including Atlas Venture Fund X selling 2,750 shares for $247,765.57 on 04/15/2026 and Bruce Booth selling 5,900 shares for $530,746.25 on 04/22/2026. The filing identifies the securities as Common Stock and references stock-option-derived shares.

Insights

Securities Compliance Analyst

Form 144 filed for proposed resale of Common Stock by holders.

The filing records a proposed sale of 11,741 shares of Common Stock as of 06/17/2026 and documents several executed sales in April 2026 by named holders. The filing format is consistent with routine resale notices under resale rules.

Cash‑flow treatment is not explicitly stated beyond per‑trade proceeds in the excerpt. Subsequent regulatory or market disclosures would show whether the proposed sale was completed; timing and distribution methods are not specified in the provided excerpt.

Key Figures

Proposed shares in Form 144: 11,741 shares Atlas Venture Fund X April 15 sale: 2,750 shares Bruce Booth April 22 sale: 5,900 shares +1 more

4 metrics

Proposed shares in Form 144 11,741 shares Form 144 entry dated 06/17/2026

Atlas Venture Fund X April 15 sale 2,750 shares Sale on 04/15/2026 for $247,765.57

Bruce Booth April 22 sale 5,900 shares Sale on 04/22/2026 for $530,746.25

Per‑trade proceeds example $247,765.57 Atlas Venture Fund X sale on 04/15/2026

Key Terms

Form 144, Common Stock, Stock Option

3 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.

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.

Stock Option financial

"Common Stock | 08/20/2020 | Stock Option | Issuer"

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.

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Available on EDGAR 06/17/2026 - 05:25 PM Accepted by SEC EDGAR 06/17/2026 - 05:25 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
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	11741	1026633.04	82257588	06/17/2026	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	08/20/2020	Stock Option	Issuer			11741	06/17/2026	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	04/15/2026	2750	247765.57
Atlas Venture Fund X, L.P. 300 Technology Sq Ste 8 Cambridge MA 02139	Common	04/22/2026	88	7926.6
Atlas Venture Opportunity Fund I, L.P. 300 Technology Sq Ste 8 Cambridge MA 02139	Common	04/15/2026	385	34687.18
Atlas Venture Opportunity Fund I, L.P. 300 Technology Sq Ste 8 Cambridge MA 02139	Common	04/22/2026	12	1080.9
Bruce Booth 300 Technology Sq Ste 8 Cambridge MA 02139	Common	04/14/2026	4159	374199.56
Bruce Booth 300 Technology Sq Ste 8 Cambridge MA 02139	Common	04/15/2026	2200	197895.00
Bruce Booth 300 Technology Sq Ste 8 Cambridge MA 02139	Common	04/22/2026	5900	530746.25

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?

The filing reports a proposed sale of 11,741 shares of Common Stock dated 06/17/2026. It also lists prior April 2026 dispositions by named holders with per‑trade proceeds shown.

Who sold shares in the prior transactions listed for KYMR?

Examples shown include Atlas Venture Fund X selling 2,750 shares on 04/15/2026 for $247,765.57, and Bruce Booth selling 5,900 shares on 04/22/2026 for $530,746.25.

Are the shares in the Form 144 from option exercises?

The excerpt references Stock Option as the source for the securities listed, indicating some shares are issuable or derived from option exercises, per the filing text.

Does the Form 144 specify how sales will be executed?

The provided excerpt does not detail distribution methods; it lists share counts, dates, and per‑trade proceeds. The filing does not state the planned sales method or timing in the excerpt.