Perceptive fund boosts Immatics (IMTX) stake with new open-market share buy

Rhea-AI Filing Summary

Immatics N.V. (IMTX) reported an insider Form 4 transaction related to Perceptive entities. On 2026-08-26, Perceptive Life Sciences Master Fund Ltd. purchased 863,060 Ordinary Shares of Immatics at $8.69 per share in an open-market or private transaction. After this purchase, the Master Fund's reported indirect holdings associated with the filing stood at 11,246,516 Ordinary Shares. The shares are directly held by the Master Fund, while Perceptive Advisors LLC serves as investment manager and Joseph Edelman is the managing member of the Advisor; both Edelman and the Advisor disclaim beneficial ownership except to the extent of any indirect pecuniary interest.

Insider Trade Summary

Net Buyer: 863,060 shares

Net Buy 1 txn

Insider PERCEPTIVE ADVISORS LLC, EDELMAN JOSEPH, PERCEPTIVE LIFE SCIENCES MASTER FUND LTD

Role Director | Director | Director

Bought 863,060 shs ($7.50M)

Type	Security	Shares	Price	Value
Purchase	Ordinary Shares F1	863,060	$8.69	$7.50M

Holdings After Transaction: Ordinary Shares — 11,246,516 shares (Indirect, See Footnote)

Footnotes (1)

1. F1. The securities are directly held by Perceptive Life Sciences Master Fund Ltd. (the "Master Fund"). Perceptive Advisors LLC (the "Advisor") serves as the investment manager to the Master Fund. Joseph Edelman is the managing member of the Advisor. Each of Mr. Edelman and the Advisor disclaims, for purposes of Section 16 of the Securities Exchange Act of 1934, beneficial ownership of such securities, except to the extent of his/its indirect pecuniary interest therein, and this report shall not be deemed an admission that either Mr. Edelman or the Advisor is the beneficial owner of such securities for purposes of Section 16 or for any other purposes.

Key Figures

Ordinary Shares purchased: 863,060 shares Purchase price per Ordinary Share: $8.69 per share Total Ordinary Shares held after transaction: 11,246,516 shares +1 more

4 metrics

Ordinary Shares purchased 863,060 shares Ordinary Shares purchased on 2026-08-26 by Perceptive Life Sciences Master Fund Ltd.

Purchase price per Ordinary Share $8.69 per share Price for the 2026-08-26 purchase transaction classified as open market or private

Total Ordinary Shares held after transaction 11,246,516 shares Indirect holdings of Ordinary Shares reported following the 2026-08-26 transaction

Net shares bought in this Form 4 863,060 shares transactionSummary shows net-buy direction with 863,060 net shares purchased

Key Terms

beneficial ownership, indirect pecuniary interest, indirect ownership, Section 16 of the Securities Exchange Act of 1934

4 terms

beneficial ownership regulatory

"disclaims, for purposes of Section 16 of the Securities Exchange Act of 1934, beneficial ownership"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

indirect pecuniary interest financial

"except to the extent of his/its indirect pecuniary interest therein"

indirect ownership financial

"total_shares_following_transaction reported as indirect ownership with nature of ownership"

Section 16 of the Securities Exchange Act of 1934 regulatory

"for purposes of Section 16 of the Securities Exchange Act of 1934, beneficial ownership"

A provision of federal securities law that requires company insiders—directors, officers and large shareholders—to publicly report their stock holdings and trades and to surrender any “short-swing” profits from purchases and sales within a six-month window. It acts like a rule that forces leaders to announce their trades and prevents quick buy-sell windfalls, giving investors transparency into insider activity and reducing opportunities for unfair gain.

FAQ

What insider transaction did IMTX report in this Form 4?

Immatics N.V. reported that Perceptive Life Sciences Master Fund Ltd. purchased 863,060 Ordinary Shares of IMTX on 2026-08-26 at a price of $8.69 per share, classified as a purchase in an open market or private transaction.

How many Immatics (IMTX) shares does the Perceptive fund hold after this transaction?

Following the reported transaction, the Form 4 shows that the Perceptive Life Sciences Master Fund Ltd. held 11,246,516 Ordinary Shares of Immatics N.V., reported as indirect ownership through the fund structure.

Who are the reporting persons in this IMTX Form 4 filing?

The reporting persons are Perceptive Advisors LLC, Joseph Edelman, and Perceptive Life Sciences Master Fund Ltd.. The securities are directly held by the Master Fund, with Perceptive Advisors as investment manager and Joseph Edelman as managing member of the Advisor.

Is the IMTX insider transaction under a Rule 10b5-1 trading plan?

The filing’s Rule 10b5-1 checkbox is not checked (aff_10b5_one is false), and the footnote does not describe any Rule 10b5-1 or pre-arranged trading plan in connection with the reported purchase.

How is ownership of the IMTX shares characterized for Joseph Edelman and Perceptive Advisors?

The footnote states that Perceptive Advisors LLC and Joseph Edelman each disclaim beneficial ownership of the Master Fund’s Immatics shares, except to the extent of any indirect pecuniary interest, and that the report is not an admission of beneficial ownership.

Are the purchased IMTX shares held directly or indirectly by the reporting persons?

The Form 4 classifies the holding as indirect ownership and explains that the securities are directly held by Perceptive Life Sciences Master Fund Ltd., with Perceptive Advisors as investment manager and Joseph Edelman as managing member of the Advisor.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/27/2026 - 04:00 PM Accepted by SEC EDGAR 08/27/2026 - 04:00 PM Learn about SEC filing dates

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^*

PERCEPTIVE ADVISORS LLC

(Last) (First) (Middle)

51 ASTOR PLACE, 10TH FLOOR

(Street)

NEW YORK NEW YORK 10003

(City) (State) (Zip)

UNITED STATES

(Country)

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

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)
08/26/2026

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

	Form filed by One Reporting Person
X	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
Ordinary Shares	08/26/2026		P		863,060	A	$8.69	11,246,516	I	See Footnote(1)

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

1. Name and Address of Reporting Person^*

PERCEPTIVE ADVISORS LLC

(Last) (First) (Middle)

51 ASTOR PLACE, 10TH FLOOR

(Street)

NEW YORK NEW YORK 10003

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

EDELMAN JOSEPH

(Last) (First) (Middle)

51 ASTOR PLACE, 10TH FLOOR

(Street)

NEW YORK NEW YORK 10003

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

PERCEPTIVE LIFE SCIENCES MASTER FUND LTD

(Last) (First) (Middle)

51 ASTOR PLACE, 10TH FLOOR

(Street)

NEW YORK NEW YORK 10003

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

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

Explanation of Responses:

1. The securities are directly held by Perceptive Life Sciences Master Fund Ltd. (the "Master Fund"). Perceptive Advisors LLC (the "Advisor") serves as the investment manager to the Master Fund. Joseph Edelman is the managing member of the Advisor. Each of Mr. Edelman and the Advisor disclaims, for purposes of Section 16 of the Securities Exchange Act of 1934, beneficial ownership of such securities, except to the extent of his/its indirect pecuniary interest therein, and this report shall not be deemed an admission that either Mr. Edelman or the Advisor is the beneficial owner of such securities for purposes of Section 16 or for any other purposes.

	/s/ Joseph Edelman - for Perceptive Advisors LLC, By: Joseph Edelman	08/27/2026
	/s/ Joseph Edelman - for Perceptive Life Sciences Master Fund Ltd., By: Perceptive Advisors LLC, its investment manager, By: Joseph Edelman, its managing member	08/27/2026
	/s/ Joseph Edelman	08/27/2026
	** 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)