Director Frances Arnold receives 29,561 GENB stock options in new grant

Rhea-AI Filing Summary

Generate Biomedicines director Frances Arnold received a stock option grant for 29,561 shares. The option was awarded at an exercise price of $0.00 per share and increases her directly held derivative position to 29,561 options. These options are scheduled to vest in full on February 19, 2027, if she continues serving through that date.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider ARNOLD FRANCES

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (Right to Buy)	29,561	$0.00	--

Holdings After Transaction: Stock Option (Right to Buy) — 29,561 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

ARNOLD FRANCES

(Last) (First) (Middle)

GENERATE BIOMEDICINES, INC.

101 SOUTH STREET, SUITE 900

(Street)

SOMERVILLE MA 02143

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Generate Biomedicines, Inc. [ GENB ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
02/26/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	$16	02/26/2026		A		29,561		(1)	02/25/2036	Common Stock	29,561	$0	29,561	D

Explanation of Responses:

1. The shares underlying this option shall vest in full on February 19, 2027, subject to the Reporting Person's continued service on such vesting date.

	/s/ Michael Wolf, Attorney-in-Fact	03/02/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did GENB director Frances Arnold report?

Frances Arnold reported receiving a stock option grant for 29,561 shares in Generate Biomedicines. The award is a derivative security, giving her the right to buy common shares, and reflects an equity-based component of her director compensation.

What are the key terms of Frances Arnold’s GENB stock option grant?

The grant covers 29,561 stock options with an exercise price of $0.00 per share. All options are scheduled to vest in a single installment on February 19, 2027, contingent on her continued service with Generate Biomedicines.

When do Frances Arnold’s newly granted GENB options vest?

All 29,561 options are set to vest in full on February 19, 2027. Vesting depends on Frances Arnold’s continued service with Generate Biomedicines through that date, aligning her long-term incentives with the company’s future performance.

How many GENB options does Frances Arnold hold after this transaction?

After the reported grant, Frances Arnold directly holds 29,561 stock options in Generate Biomedicines. This reflects the full size of the new award, as indicated by the total derivative securities beneficially owned following the transaction.

Was the GENB stock option grant to Frances Arnold a purchase or a sale?

The transaction is classified as an acquisition by grant or award, not an open-market purchase or sale. Frances Arnold received 29,561 stock options as compensation, with no cash purchase reported and no concurrent disposition of securities.