BVF PARTNERS L P/IL - 16 Sep 2026 Form 4 Insider Report for IMMUNIC, INC. (IMUX)

Reporting relationship: Director, Other*
Issuer ticker: IMUX
Reported as of: 16 Sep 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 18 Sep 2026, 19:45:38 UTC
Prior SEC filing: 16 Jul 2026
Next SEC filing: 05 Oct 2026
Source filing: View source filing
Reporting owner signature: BVF Partners L.P., By: BVF Inc., its general partner, By: /s/ Mark N. Lampert, President

Key filing fact

BVF PARTNERS L P/IL filed Form 4 for IMMUNIC, INC. (IMUX) on 18 Sep 2026.

Key facts

This page summarizes BVF PARTNERS L P/IL's Form 4 filing for IMMUNIC, INC. (IMUX).
1 reported transaction and 10 derivative rows are listed below.
Accepted by SEC: 18 Sep 2026, 19:45.

Change

Previous filing in this sequence was filed on 16 Jul 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (10)

CIK 0001055947 Primary reporting owner

BVF PARTNERS L P/IL

Relationship: Director, Other*
Address: 44 MONTGOMERY STREET, 40TH FLOOR, SAN FRANCISCO
Signature: BVF Partners L.P., By: BVF Inc., its general partner, By: /s/ Mark N. Lampert, President
Signature date: 18 Sep 2026

CIK 0000918923

BIOTECHNOLOGY VALUE FUND L P

Relationship: Director, Other*
Address: 44 MONTGOMERY STREET, 40TH FLOOR, SAN FRANCISCO
Signature: Biotechnology Value Fund, L.P., By: BVF I GP LLC, its general partner, By: /s/ Mark N. Lampert, Chief Executive Officer
Signature date: 18 Sep 2026

CIK 0001803805

BVF I GP LLC

Relationship: Director, Other*
Address: 44 MONTGOMERY STREET, 40TH FLOOR, SAN FRANCISCO
Signature: BVF I GP LLC, By: /s/ Mark N. Lampert, Chief Executive Officer
Signature date: 18 Sep 2026

CIK 0001102444

BIOTECHNOLOGY VALUE FUND II LP

Relationship: Director, Other*
Address: 44 MONTGOMERY STREET, 40TH FLOOR, SAN FRANCISCO
Signature: Biotechnology Value Fund II, L.P., By: BVF II GP LLC, its general partner, By: /s/ Mark N. Lampert, Chief Executive Officer
Signature date: 18 Sep 2026

CIK 0001803806

BVF II GP LLC

Relationship: Director, Other*
Address: 44 MONTGOMERY STREET, 40TH FLOOR, SAN FRANCISCO
Signature: BVF II GP LLC, By: /s/ Mark N. Lampert, Chief Executive Officer
Signature date: 18 Sep 2026

CIK 0001660683

Biotechnology Value Trading Fund OS LP

Relationship: Director, Other*
Address: P.O. BOX 309 UGLAND HOUSE, GRAND CAYMAN, CAYMAN ISLANDS
Signature: BVF Partners OS Ltd., By: BVF Partners L.P., its sole member, By: BVF Inc., its general partner, By: /s/ Mark N. Lampert, President
Signature date: 18 Sep 2026

CIK 0001660684

BVF Partners OS Ltd.

Relationship: Director, Other*
Address: P.O. BOX 309 UGLAND HOUSE, GRAND CAYMAN, CAYMAN ISLANDS
Signature: Biotechnology Value Trading Fund OS LP, By: BVF Partners L.P., its investment manager, BVF Inc., its general partner, By: /s/ Mark N. Lampert, President
Signature date: 18 Sep 2026

CIK 0001803809

BVF GP HOLDINGS LLC

Relationship: Director, Other*
Address: 44 MONTGOMERY STREET, 40TH FLOOR, SAN FRANCISCO
Signature: BVF GP Holdings LLC, By: /s/ Mark N. Lampert, Chief Executive Officer
Signature date: 18 Sep 2026

CIK 0001056807

BVF INC/IL

Relationship: Director, Other*
Address: 44 MONTGOMERY STREET, 40TH FLOOR, SAN FRANCISCO
Signature: BVF Inc., By: /s/ Mark N. Lampert, President
Signature date: 18 Sep 2026

CIK 0001233840

LAMPERT MARK N

Relationship: Director, Other*
Address: 44 MONTGOMERY STREET, 40TH FLOOR, SAN FRANCISCO
Signature: /s/ Mark N. Lampert
Signature date: 18 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 413,595
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F3

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 413,595
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F3

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 413,595
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F3

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 413,595
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F3

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 413,595
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F3

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 413,595
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F3

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 413,595
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F3

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 413,595
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F3

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 413,595
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F3

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 413,595
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F3

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 302,710
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F4

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 302,710
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F4

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 302,710
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F4

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 302,710
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F4

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 302,710
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F4

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 302,710
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F4

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 302,710
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F4

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 302,710
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F4

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 302,710
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F4

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 302,710
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F4

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 42,762
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F5

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 42,762
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F5

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 42,762
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F5

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 42,762
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F5

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 42,762
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F5

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 42,762
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F5

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 42,762
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F5

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 42,762
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F5

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 42,762
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F5

IMUX holding

Common Stock, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 42,762
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F5

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

IMUX transaction Derivative

Stock Option

Award

Transaction value
Shares: +25,370
Change %
Price: $0.000000^*
Shares after: 25,370
Date: 16 Sep 2026
Ownership: See footnote
Underlying class: Common Stock, $0.0001 par value
Underlying amount: 25,370
Exercise price: $10.12
Footnotes: F1, F6, F7

IMUX transaction Derivative

Stock Option

Award

Transaction value
Shares: +25,370
Change %
Price: $0.000000^*
Shares after: 25,370
Date: 16 Sep 2026
Ownership: See footnote
Underlying class: Common Stock, $0.0001 par value
Underlying amount: 25,370
Exercise price: $10.12
Footnotes: F1, F6, F7

IMUX transaction Derivative

Stock Option

Award

Transaction value
Shares: +25,370
Change %
Price: $0.000000^*
Shares after: 25,370
Date: 16 Sep 2026
Ownership: See footnote
Underlying class: Common Stock, $0.0001 par value
Underlying amount: 25,370
Exercise price: $10.12
Footnotes: F1, F6, F7

IMUX transaction Derivative

Stock Option

Award

Transaction value
Shares: +25,370
Change %
Price: $0.000000^*
Shares after: 25,370
Date: 16 Sep 2026
Ownership: See footnote
Underlying class: Common Stock, $0.0001 par value
Underlying amount: 25,370
Exercise price: $10.12
Footnotes: F1, F6, F7

IMUX transaction Derivative

Stock Option

Award

Transaction value
Shares: +25,370
Change %
Price: $0.000000^*
Shares after: 25,370
Date: 16 Sep 2026
Ownership: See footnote
Underlying class: Common Stock, $0.0001 par value
Underlying amount: 25,370
Exercise price: $10.12
Footnotes: F1, F6, F7

IMUX transaction Derivative

Stock Option

Award

Transaction value
Shares: +25,370
Change %
Price: $0.000000^*
Shares after: 25,370
Date: 16 Sep 2026
Ownership: See footnote
Underlying class: Common Stock, $0.0001 par value
Underlying amount: 25,370
Exercise price: $10.12
Footnotes: F1, F6, F7

IMUX transaction Derivative

Stock Option

Award

Transaction value
Shares: +25,370
Change %
Price: $0.000000^*
Shares after: 25,370
Date: 16 Sep 2026
Ownership: See footnote
Underlying class: Common Stock, $0.0001 par value
Underlying amount: 25,370
Exercise price: $10.12
Footnotes: F1, F6, F7

IMUX transaction Derivative

Stock Option

Award

Transaction value
Shares: +25,370
Change %
Price: $0.000000^*
Shares after: 25,370
Date: 16 Sep 2026
Ownership: See footnote
Underlying class: Common Stock, $0.0001 par value
Underlying amount: 25,370
Exercise price: $10.12
Footnotes: F1, F6, F7

IMUX transaction Derivative

Stock Option

Award

Transaction value
Shares: +25,370
Change %
Price: $0.000000^*
Shares after: 25,370
Date: 16 Sep 2026
Ownership: See footnote
Underlying class: Common Stock, $0.0001 par value
Underlying amount: 25,370
Exercise price: $10.12
Footnotes: F1, F6, F7

IMUX transaction Derivative

Stock Option

Award

Transaction value
Shares: +25,370
Change %
Price: $0.000000^*
Shares after: 25,370
Date: 16 Sep 2026
Ownership: See footnote
Underlying class: Common Stock, $0.0001 par value
Underlying amount: 25,370
Exercise price: $10.12
Footnotes: F1, F6, F7

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 7 footnotes

Footnote F1

This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

Footnote F2

Reflects a one-for-ten reverse stock split of the Issuer's issued and outstanding Common Stock, effective as of April 27, 2026 (the "Stock Split").

Footnote F3

Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Footnote F4

Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Footnote F5

Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Footnote F6

The option vests in monthly increments over a period of one year from the grant date.

Footnote F7

Partners, BVF Inc. and Mr. Lampert may be deemed to have a pecuniary interest in the securities reported owned herein due to a certain agreement between Partners and R. Thorvald Nagel, who serves on the Issuer's board of directors and as a Principal of Partners, pursuant to which Mr. Nagel is obligated to transfer the economic benefit, if any, received upon the sale of the shares issuable upon exercise of the securities reported owned herein to Partners. As such, Mr. Nagel disclaims beneficial ownership of the securities reported herein except to the extent of his pecuniary interest therein.

SEC remarks

For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each of the Reporting Persons may be deemed to be a director by deputization of the Issuer due to a Principal of Partners, R. Thorvald Nagel, serving on the Board of Directors of the Issuer, and his agreement to transfer the economic benefit, if any, received upon the sale of the shares issuable upon exercise of the securities reported owned herein to Partners.

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