Immatics (IMTX) director discloses existing stock option grants

Rhea-AI Filing Summary

Immatics N.V. director Heather L. Mason filed an initial ownership report listing existing stock option awards over the company’s ordinary shares. She holds several options with exercise prices such as 5.4400 and 12.0000 per share, expiring between 2030 and 2035. Some options are already fully vested, while others vest 100% on June 24, 2025, highlighting her long-term equity-based compensation. The filing reports holdings only and does not show any new purchases or sales.

Insider Trade Summary

6 transactions reported

Mixed 6 txns

Insider Mason Heather L

Role Director

Type	Security	Shares	Price	Value
holding	Stock Option (Right to Buy)	--	--	--
holding	Stock Option (Right to Buy)	--	--	--
holding	Stock Option (Right to Buy)	--	--	--
holding	Stock Option (Right to Buy)	--	--	--
holding	Stock Option (Right to Buy)	--	--	--
holding	Stock Option (Right to Buy)	--	--	--

Holdings After Transaction: Stock Option (Right to Buy) — 25,000 shares (Direct)

Footnotes (1)

1. These options to purchase ordinary shares of the Issuer (each such option, an "Option") are fully vested. These Options vest 100% on the first anniversary of the grant date, June 24, 2025.

Understanding Insider Trading Forms →

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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

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1. Name and Address of Reporting Person^*

Mason Heather L

(Last) (First) (Middle)

PAUL-EHRLICH-STR. 15

(Street)

TUBINGEN 72076

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026

3. Issuer Name and Ticker or Trading Symbol
Immatics N.V. [ IMTX ]

3a. Foreign Trading Symbol

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

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

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

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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	(1)	06/30/2030	Ordinary Shares	25,000	$10	D
Stock Option (Right to Buy)	(1)	12/08/2031	Ordinary Shares	15,000	$11	D
Stock Option (Right to Buy)	(1)	06/13/2032	Ordinary Shares	25,000	$7.94	D
Stock Option (Right to Buy)	(1)	06/26/2033	Ordinary Shares	25,000	$11.41	D
Stock Option (Right to Buy)	(1)	06/24/2034	Ordinary Shares	40,000	$12	D
Stock Option (Right to Buy)	(2)	06/23/2035	Ordinary Shares	41,500	$5.44	D

Explanation of Responses:

1. These options to purchase ordinary shares of the Issuer (each such option, an "Option") are fully vested.

2. These Options vest 100% on the first anniversary of the grant date, June 24, 2025.

Remarks:

Exhibit List - Exhibit 24.1 - Power of Attorney

	/s/ Edward Sturchio, attorney-in-fact for Heather L. Mason	03/18/2026
	** 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 5 (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 3: SEC 1473 (03-26)

FAQ

What does Heather L. Mason’s Form 3 for Immatics (IMTX) show?

The Form 3 shows existing stock option holdings. Heather L. Mason reports several options to buy Immatics ordinary shares at preset exercise prices, with expirations from 2030 to 2035, reflecting her current equity-based compensation position as a director.

Are there any buy or sell transactions in the Immatics (IMTX) Form 3?

No buy or sell transactions are reported. The filing lists holdings of stock options only, without any open-market purchases, sales, exercises, gifts, or other disposition events, so it is purely a disclosure of existing derivative positions.

What stock option terms are disclosed for Heather L. Mason at Immatics (IMTX)?

The options have fixed exercise prices and distant expirations. Mason’s options carry exercise prices including 5.4400 and 12.0000 per share, with expirations spanning from 2030 through 2035, giving long-dated rights to acquire ordinary shares.

Which Immatics (IMTX) options for Heather L. Mason are fully vested?

One group of options is fully vested now. The filing notes certain options to purchase ordinary shares are already fully vested, meaning they are immediately exercisable under their terms, while separate grants vest later based on time.

When do Heather L. Mason’s other Immatics (IMTX) options vest?

Some options vest on June 24, 2025. A specific option grant is scheduled to vest 100% on the first anniversary of its grant date, June 24, 2025, after which all shares under that grant become exercisable.

What underlying shares are covered by Heather L. Mason’s Immatics (IMTX) options?

The options relate to ordinary shares of Immatics. Each stock option grant is a right to buy Immatics ordinary shares at a stated exercise price, aligning the director’s potential future gains with the performance of the company’s common equity.