KYMR (NASDAQ) director/insider plans 4,600-share option exercise; prior 7,400-share 10b5-1 sale

Rhea-AI Filing Summary

KYMR reported a proposed sale of 4,600 shares of Common Stock via exercise of stock options to be effected on 04/01/2026 through Morgan Stanley Smith Barney LLC. The filing also records prior 10b5-1 sales by Elena Ridloff of 7,400 shares on 03/31/2026 for $631,738.74.

Insights

Compliance & Insider Transactions Analyst

Routine Form 144 sale notice tied to option exercise and recent 10b5-1 activity.

The filing documents a planned disposition of 4,600 shares by exercise of stock options on 04/01/2026 and discloses earlier Rule 10b5-1 sales of 7,400 shares on 03/31/2026 for $631,738.74. This pattern is consistent with executive liquidity actions rather than operating results.

Cash‑flow treatment is stated as Cash for the option exercise. Timing and mechanics are explicit in the excerpt; subsequent filings would show actual settlement details and post‑transaction holdings.

Key Figures

Planned shares to be sold: 4,600 shares Recent 10b5-1 shares sold: 7,400 shares Proceeds from prior sale: $631,738.74 +1 more

4 metrics

Planned shares to be sold 4,600 shares Exercise of stock options on 04/01/2026

Recent 10b5-1 shares sold 7,400 shares 10b5-1 sales by Elena Ridloff on 03/31/2026

Proceeds from prior sale $631,738.74 Proceeds for 7,400 shares sold on 03/31/2026

Broker Morgan Stanley Smith Barney LLC Broker listed for the proposed sale

Key Terms

Form 144, 10b5-1, Exercise of Stock Options

3 terms

Form 144 regulatory

"Securities To Be Sold ... Exercise of Stock Options ... 04/01/2026"

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.

10b5-1 regulatory

"10b5-1 Sales for ELENA RIDLOFF ... 03/31/2026"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

Exercise of Stock Options financial

"Securities To Be Sold ... Exercise of Stock Options ... Cash"

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	4600	383134.00	81642394	04/01/2026	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	04/01/2026	Exercise of Stock Options	Issuer			4600	04/01/2026	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 ELENA RIDLOFF 500 North Beacon Street, 4th Floor Watertown MA 02472	Common	03/31/2026	7400	631738.74

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 04/01/2026 transaction?

The Form 144 discloses a proposed sale of 4,600 shares via exercise of stock options on 04/01/2026. It states the transaction method as an option exercise and the payment method as cash.

Who is the broker handling the proposed sale in KYMR's filing?

The broker listed is Morgan Stanley Smith Barney LLC at 1 New York Plaza, 8th Floor, New York. The filing ties the sale execution to that broker for the disclosed transaction.

What prior sales in the past three months does the filing report for KYMR insiders?

The filing reports 10b5-1 sales by Elena Ridloff of 7,400 shares on 03/31/2026 for $631,738.74. These prior sales are disclosed separately from the proposed 04/01/2026 transaction.

Was the 04/01/2026 transaction described as a cash or noncash transaction?

The 04/01/2026 exercise of stock options is described with the payment method as Cash, indicating cash was used in connection with the option exercise and related sale.

Does the Form 144 show who receives proceeds from the sale?

The excerpt lists the transaction as an option exercise and states Cash as the method; it does not explicitly allocate proceeds to a party beyond the exercise description in the provided text.