RLAY insider plans sale of 42,225 shares

RLAY insider Sekar Kathiresan filed to sell common stock under a planned transaction.

Rhea-AI Filing Summary

RLAY insider Sekar Kathiresan filed to sell common stock under a planned transaction. The filing lists 42,225 shares of common stock to be sold on 08/04/2026 in connection with a stock option exercise, with an indicated value of $826,465.70, to be executed in cash through Morgan Stanley Smith Barney LLC Executive Financial Services on NASDAQ. It also reports prior sales over the past three months: 30,000 shares on 07/31/2026 for $563,553.00, 30,000 shares on 07/21/2026 for $594,414.00, and 66,055 shares on 07/20/2026 for $1,293,555.07.

Key Figures

Planned shares to be sold: 42,225 shares Estimated value of planned sale: $826,465.70 Security identifier: 191586165 +6 more

9 metrics

Planned shares to be sold 42,225 shares Common stock sale planned for 08/04/2026 linked to stock option exercise

Estimated value of planned sale $826,465.70 Value associated with 42,225 common shares to be sold

Security identifier 191586165 Identifier listed for the common stock in the transaction details

Shares sold 07/31/2026 30,000 shares Common stock sold during past 3 months

Proceeds 07/31/2026 $563,553.00 Amount received for 30,000 shares sold on 07/31/2026

Shares sold 07/21/2026 30,000 shares Common stock sold during past 3 months

Proceeds 07/21/2026 $594,414.00 Amount received for 30,000 shares sold on 07/21/2026

Shares sold 07/20/2026 66,055 shares Common stock sold during past 3 months

Proceeds 07/20/2026 $1,293,555.07 Amount received for 66,055 shares sold on 07/20/2026

Key Terms

Stock Option Exercise, Executive Financial Services, Common stock

3 terms

Stock Option Exercise financial

"Common | 08/04/2026 | Stock Option Exercise | Issuer"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

Executive Financial Services financial

"Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza"

Common stock financial

"Common | Morgan Stanley Smith Barney LLC Executive Financial Services"

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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stock sale is disclosed for RLAY on 08/04/2026?

The filing discloses a planned sale of 42,225 shares of RLAY common stock on 08/04/2026, linked to a stock option exercise and to be settled in cash through Morgan Stanley Smith Barney LLC on NASDAQ.

Who is the insider selling RLAY shares and through which broker?

The seller is Sekar Kathiresan, and the transaction will be handled by Morgan Stanley Smith Barney LLC Executive Financial Services at 1 New York Plaza, New York, acting as the broker for the planned NASDAQ sale.

What is the estimated value of the 42,225 RLAY shares planned for sale?

The estimated value of the 42,225 shares of RLAY common stock planned for sale is listed as $826,465.70, based on the information provided for the upcoming 08/04/2026 stock option exercise transaction.

What RLAY stock sales occurred in the three months before 08/04/2026?

The filing lists three prior RLAY sales: 30,000 shares on 07/31/2026 for $563,553.00, 30,000 shares on 07/21/2026 for $594,414.00, and 66,055 shares on 07/20/2026 for $1,293,555.07.

What type of transaction is associated with the new RLAY share sale?

The planned sale of 42,225 RLAY shares on 08/04/2026 is tied to a stock option exercise, with the issuer noted as the source of the options and the proceeds to be received in cash.

On which exchange will the planned RLAY share sale take place?

The filing specifies that the planned sale of 42,225 RLAY common shares associated with the stock option exercise on 08/04/2026 will be executed on the NASDAQ market.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/04/2026 - 04:12 PM Accepted by SEC EDGAR 08/04/2026 - 04:11 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	0001864112
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	RELAY THERAPEUTICS, INC.
SEC File Number	001-39385
Address of Issuer	60 Hampshire Street Cambridge MASSACHUSETTS 02139
Phone	(617) 370-8837
Name of Person for Whose Account the Securities are To Be Sold	SEKAR KATHIRESAN
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	Director

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	42225	826465.70	191586165	08/04/2026	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	08/04/2026	Stock Option Exercise	Issuer			42225	08/04/2026	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
SEKAR KATHIRESAN 60 Hampshire Street Cambridge MA 02139	Common	07/31/2026	30000	563553.00
SEKAR KATHIRESAN 60 Hampshire Street Cambridge MA 02139	Common	07/21/2026	30000	594414.00
SEKAR KATHIRESAN 60 Hampshire Street Cambridge MA 02139	Common	07/20/2026	66055	1293555.07

144: Remarks and Signature

Remarks
Date of Notice	08/04/2026
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	/s/ Sekar Kathiresan
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)