Immatics (IMTX): Baker Bros. group reports 9.5M-share, 7% ownership stake

Rhea-AI Filing Summary

Baker Bros. Advisors LP and related reporting persons filed Amendment No. 6 to report their ownership in Immatics N.V. They beneficially own 9,508,565 ordinary shares of Immatics, held directly by Baker Brothers Life Sciences, L.P. and 667, L.P., which may be deemed to be indirectly owned by the reporting persons through management and control arrangements.

This position represents 7.0% of Immatics’ ordinary shares, based on 136,673,161 shares outstanding as of March 31, 2026, as cited from Immatics’ Form 6-K. The reporting persons have sole voting and dispositive power over all 9,508,565 shares and no shared voting or dispositive power.

Key Figures

Beneficially owned shares: 9,508,565 shares Ownership percentage: 7.0% Shares outstanding baseline: 136,673,161 shares +2 more

5 metrics

Beneficially owned shares 9,508,565 shares Ordinary shares of Immatics N.V. beneficially owned by the reporting persons

Ownership percentage 7.0% Percent of Immatics ordinary shares owned by the reporting persons

Shares outstanding baseline 136,673,161 shares Immatics ordinary shares outstanding as of March 31, 2026, from Form 6-K

Sole voting power 9,508,565 shares Shares over which the reporting persons have sole power to vote or direct the vote

Sole dispositive power 9,508,565 shares Shares over which the reporting persons have sole power to dispose or direct disposition

Key Terms

beneficially own, Sole Voting Power, Sole Dispositive Power, Percent of class, +1 more

5 terms

beneficially own financial

"The Reporting Persons beneficially own 9,508,565 shares of Common Stock directly held"

Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.

Sole Voting Power financial

"5 | Sole Voting Power 9,508,565.00 6 | Shared Voting Power 0.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

Sole Dispositive Power financial

"7 | Sole Dispositive Power 9,508,565.00 8 | Shared Dispositive Power 0.00"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

Percent of class financial

"(b) | Percent of class: The information in Item 11 of each"

Percent of class is the portion of a specific category of securities—such as a company’s common shares, preferred shares, or a bond series—that takes part in or approves a corporate action (vote, consent, tender, etc.). Investors watch this number because it reveals how much support or opposition exists within that particular shareholder group; like counting how many members of a club back a proposal, it can determine whether a plan passes or how influence is distributed.

parent holding company financial

"If a parent holding company has filed this schedule, pursuant to (ii)(G)"

FAQ

How many Immatics N.V. (IMTX) shares do the Baker Bros. reporting group beneficially own?

The reporting persons beneficially own 9,508,565 Immatics ordinary shares. These shares are directly held by Baker Brothers Life Sciences, L.P. and 667, L.P., and may be deemed indirectly owned through Baker Bros. Advisors LP and its affiliated general partner entities.

What percentage of Immatics N.V. (IMTX) does the Baker Bros. group hold according to this Schedule 13G/A?

The filing reports that the group holds 7.0% of Immatics’ ordinary shares. This percentage is calculated based on 136,673,161 shares outstanding as of March 31, 2026, as reported in Immatics’ Form 6-K filed on May 12, 2026.

Who are the reporting persons in the Immatics N.V. (IMTX) Schedule 13G/A Amendment No. 6?

The reporting persons are Baker Bros. Advisors LP, Baker Bros. Advisors (GP) LLC, and individuals Julian C. Baker and Felix J. Baker. The shares are directly held by Baker Brothers Life Sciences, L.P. and 667, L.P., which are managed by the Adviser entities.

What voting and dispositive powers over Immatics (IMTX) shares are reported by the Baker Bros. group?

The reporting persons state they have sole power to vote and dispose of 9,508,565 Immatics ordinary shares. They report 0 shares subject to shared voting power and 0 shares subject to shared dispositive power in this Schedule 13G/A amendment.

On what share count is the Baker Bros. 7.0% ownership in Immatics (IMTX) based?

The 7.0% ownership figure is based on 136,673,161 Immatics ordinary shares outstanding as of March 31, 2026. This outstanding share count comes from Immatics’ Form 6-K filed with the SEC on May 12, 2026.

Which entities directly hold the Immatics N.V. (IMTX) shares referenced in the Baker Bros. Schedule 13G/A?

The 9,508,565 Immatics shares are directly held by Baker Brothers Life Sciences, L.P. and 667, L.P.. Baker Bros. Advisors LP manages these funds and, along with its general partner and principals, may be deemed to beneficially own the securities they hold.

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Available on EDGAR 08/14/2026 - 04:04 PM Accepted by SEC EDGAR 08/14/2026 - 04:00 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 6)

Immatics N.V.

(Name of Issuer)

Ordinary Shares, nominal value EUR 0.01 per share

(Title of Class of Securities)

N44445109

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): N44445109

1

Names of Reporting Persons

Baker Bros. Advisors LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 9,508,565.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 9,508,565.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

9,508,565.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.0 %

12

Type of Reporting Person (See Instructions)

IA, PN

SCHEDULE 13G

CUSIP Number(s): N44445109

1

Names of Reporting Persons

Baker Bros. Advisors (GP) LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 9,508,565.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 9,508,565.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

9,508,565.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.0 %

12

Type of Reporting Person (See Instructions)

HC, OO

SCHEDULE 13G

CUSIP Number(s): N44445109

1

Names of Reporting Persons

Julian C. Baker

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 9,508,565.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 9,508,565.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

9,508,565.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.0 %

12

Type of Reporting Person (See Instructions)

HC, IN

SCHEDULE 13G

CUSIP Number(s): N44445109

1

Names of Reporting Persons

Felix J. Baker

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 9,508,565.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 9,508,565.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

9,508,565.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.0 %

12

Type of Reporting Person (See Instructions)

HC, IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Immatics N.V.
(b)	Address of issuer's principal executive offices: PAUL EHRLICH-STRASSE 15, Tubingen, 2M 72076
Item 2.
(a)	Name of person filing: This Amendment No. 6 to Schedule 13G amends the previously filed Schedule 13G filed by Baker Bros. Advisors LP (the "Adviser"), Baker Bros. Advisors (GP) LLC (the "Adviser GP"), Julian C. Baker and Felix J. Baker (collectively, the "Reporting Persons"). Except as supplemented herein, such statements, as heretofore amended and supplemented, remain in full force and effect. This Amendment No. 6 is being filed jointly by the Reporting Persons.
(b)	Address or principal business office or, if none, residence: The business address of each of the Reporting Persons is: c/o Baker Bros. Advisors LP 860 Washington Street, 3rd Floor New York, NY 10014 (212) 339-5690
(c)	Citizenship: The Adviser is a limited partnership organized under the laws of the State of Delaware. The Adviser GP is a limited liability company organized under the laws of the State of Delaware. The citizenship of each of Julian C. Baker and Felix J. Baker is the United States of America.
(d)	Title of class of securities: Ordinary Shares, nominal value EUR 0.01 per share
(e)	CUSIP No.: N44445109
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: Items 5 through 9 of each of the cover pages to this Amendment No. 6 are incorporated herein by reference. Set forth below is the aggregate number of ordinary shares ("Common Stock") of Immatics N.V. (the "Issuer") directly held in the aggregate by Baker Brothers Life Sciences, L.P. ("Life Sciences") and 667, L.P. ("667", and together with Life Sciences, the "Funds") which may be deemed to be indirectly beneficially owned by the Reporting Persons. The Reporting Persons beneficially own 9,508,565 shares of Common Stock directly held by the Funds. Pursuant to the management agreements, as amended, among the Adviser, the Funds and their respective general partners, the Funds' respective general partners relinquished to the Adviser all discretion and authority with respect to the investment and voting power of the securities held by the Funds, and thus the Adviser has complete and unlimited discretion and authority with respect to the Funds' investments and voting power over investments. The Adviser GP is the sole general partner of the Adviser. The Adviser GP, Felix J. Baker and Julian C. Baker as managing members of the Adviser GP, and the Adviser may be deemed to be beneficial owners of securities of the Issuer directly held by the Funds.
(b)	Percent of class: The information in Item 11 of each of the cover pages to this Amendment No. 6 is incorporated herein by reference. The percentage of beneficial ownership for each of the Reporting Persons reported herein is based on 136,673,161 shares of Common Stock outstanding as of March 31, 2026, as reported in the Issuer's 6-K filed with the Securities and Exchange Commission ("SEC") on May 12, 2026.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: The Reporting Persons have sole power to vote or direct the vote of 9,508,565 shares of Common Stock directly held by the Funds.
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: The Reporting Persons have sole power to dispose or direct the disposition of 9,508,565 shares of Common Stock directly held by the Funds.
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. The information in Item 4 is incorporated herein by reference.
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Baker Bros. Advisors LP

Signature:	/s/ Scott L. Lessing
Name/Title:	Scott L. Lessing/ President By: Baker Bros. Advisors (GP) LLC, its general partner
Date:	08/14/2026

Baker Bros. Advisors (GP) LLC

Signature:	/s/ Scott L. Lessing
Name/Title:	Scott L. Lessing/ President
Date:	08/14/2026

Julian C. Baker

Signature:	/s/ Julian C. Baker
Name/Title:	Julian C. Baker
Date:	08/14/2026

Felix J. Baker

Signature:	/s/ Felix J. Baker
Name/Title:	Felix J. Baker
Date:	08/14/2026