Obsidian director granted options on 37,653 shares

Obsidian Therapeutics, Inc. director Heidi Hagen received a stock option grant covering 37,653 shares of common stock on 2026-08-03.

Accepted by SEC EDGAR 08/05/2026 - 04:06 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Obsidian Therapeutics, Inc. director Heidi Hagen received a stock option grant covering 37,653 shares of common stock on 2026-08-03. The option has an exercise price of $12.00 per share and expires on 2036-08-02. The shares vest upon the earlier of the one-year anniversary of the grant date or the company’s next annual stockholders’ meeting, subject to her continued service.

Insider Trade Summary

Grant/Award: 37,653 shares

Grant/Award 1 txn

Insider Hagen Heidi

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (Right to Buy) F1	37,653	$0.00	$0.00

Holdings After Transaction: Stock Option (Right to Buy) — 37,653 contracts (Direct)

Footnotes (1)

1. F1. The shares underlying this option shall vest and become exercisable upon the earlier of (i) the one-year anniversary of the grant date or (ii) the date of the Issuer's annual meeting of stockholders following the grant date, subject to the Reporting Person's continued service with the Issuer on such vesting date.

Key Figures

Options granted: 37,653 shares Exercise price: $12.00 per share Expiration date: 2036-08-02 +1 more

4 metrics

Options granted 37,653 shares Stock Option (Right to Buy) awarded to director on 2026-08-03

Exercise price $12.00 per share Conversion or exercise price for the stock option grant

Expiration date 2036-08-02 Option term end date for the 37,653-share grant

Underlying shares 37,653 shares Common stock issuable upon exercise of the reported options

Key Terms

Stock Option (Right to Buy), exercise price, vesting, annual meeting of stockholders

4 terms

Stock Option (Right to Buy) financial

"security_title: Stock Option (Right to Buy)"

exercise price financial

"conversion_or_exercise_price: 12.0000"

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

vesting financial

"shares underlying this option shall vest and become exercisable"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

annual meeting of stockholders financial

"date of the Issuer's annual meeting of stockholders"

FAQ

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

What did Obsidian Therapeutics (OBX) director Heidi Hagen receive in this Form 4?

Heidi Hagen received a stock option grant for 37,653 shares of Obsidian Therapeutics common stock at an exercise price of $12.00 per share, expiring on 2036-08-02.

When do Heidi Hagen’s new OBX stock options vest?

The options vest and become exercisable upon the earlier of one year after the grant date or the date of Obsidian Therapeutics’ next annual stockholders’ meeting, provided she continues to serve the company on that vesting date.

How many Obsidian Therapeutics (OBX) options does Heidi Hagen hold after this transaction?

After this transaction, Heidi Hagen holds 37,653 stock options as reported in the filing. These options are exercisable for an equal number of common shares at an exercise price of $12.00 per share, subject to vesting.

Did Heidi Hagen buy or sell any OBX common stock in this Form 4?

No common stock purchases or sales are reported. The Form 4 shows only a grant of stock options, representing an acquisition of derivative securities rather than an open-market buy or sell of Obsidian Therapeutics shares.

What is the significance of the $12.00 exercise price on Heidi Hagen’s OBX options?

The $12.00 exercise price is the price per share Heidi Hagen would pay to purchase Obsidian Therapeutics common stock upon exercising the options, any time before their 2036-08-02 expiration and after the options have vested.

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

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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^*

Hagen Heidi

(Last) (First) (Middle)

C/O OBSIDIAN THERAPEUTICS, INC.

1030 MASSACHUSETTS AVE

(Street)

CAMBRIDGE MASSACHUSETTS 02138

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Obsidian Therapeutics, Inc. [ OBX ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/03/2026

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

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

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

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)	$12	08/03/2026		A		37,653		(1)	08/02/2036	Common Stock	37,653	$0	37,653	D

Explanation of Responses:

1. The shares underlying this option shall vest and become exercisable upon the earlier of (i) the one-year anniversary of the grant date or (ii) the date of the Issuer's annual meeting of stockholders following the grant date, subject to the Reporting Person's continued service with the Issuer on such vesting date.

	/s/ Gabriela Morales-Rivera, Attorney-in-Fact	08/05/2026
	** 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.
* Form 4: SEC 1474 (03-26)