BVF PARTNERS L P/IL - 14 May 2026 Form 4 Insider Report for XOMA Royalty Corp (XOMA)

Reporting relationship: 10%+ Owner
Issuer ticker: XOMA
Reported as of: 14 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 18 May 2026, 17:29:45 UTC
Prior SEC filing: 02 Apr 2026
Next SEC filing: 22 Jun 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 XOMA Royalty Corp (XOMA) on 18 May 2026.

Key facts

This page summarizes BVF PARTNERS L P/IL's Form 4 filing for XOMA Royalty Corp (XOMA).
8 reported transactions and 40 derivative rows are listed below.
Accepted by SEC: 18 May 2026, 17:29.

Change

Previous filing in this sequence was filed on 02 Apr 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: 10%+ Owner
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 May 2026

CIK 0000918923

BIOTECHNOLOGY VALUE FUND L P

Relationship: 10%+ Owner
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 May 2026

CIK 0001803805

BVF I GP LLC

Relationship: 10%+ Owner
Address: 44 MONTGOMERY STREET, 40TH FLOOR, SAN FRANCISCO
Signature: BVF I GP LLC, By: /s/ Mark N. Lampert, Chief Executive Officer
Signature date: 18 May 2026

CIK 0001102444

BIOTECHNOLOGY VALUE FUND II LP

Relationship: 10%+ Owner
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 May 2026

CIK 0001803806

BVF II GP LLC

Relationship: 10%+ Owner
Address: 44 MONTGOMERY STREET, 40TH FLOOR, SAN FRANCISCO
Signature: BVF II GP LLC, By: /s/ Mark N. Lampert, Chief Executive Officer
Signature date: 18 May 2026

CIK 0001660683

Biotechnology Value Trading Fund OS LP

Relationship: 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 May 2026

CIK 0001660684

BVF Partners OS Ltd.

Relationship: 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 May 2026

CIK 0001803809

BVF GP HOLDINGS LLC

Relationship: 10%+ Owner
Address: 44 MONTGOMERY STREET, 40TH FLOOR, SAN FRANCISCO
Signature: BVF GP Holdings LLC, By: /s/ Mark N. Lampert, Chief Executive Officer
Signature date: 18 May 2026

CIK 0001056807

BVF INC/IL

Relationship: 10%+ Owner
Address: 44 MONTGOMERY STREET, 40TH FLOOR, SAN FRANCISCO
Signature: BVF Inc., By: /s/ Mark N. Lampert, President
Signature date: 18 May 2026

CIK 0001233840

LAMPERT MARK N

Relationship: 10%+ Owner
Address: 44 MONTGOMERY STREET, 40TH FLOOR, SAN FRANCISCO
Signature: /s/ Mark N. Lampert
Signature date: 18 May 2026

Reported non-derivative transactions

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

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +2,313,000
Change %: +175%
Price: $4.03^*
Shares after: 3,635,758
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F3

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +2,313,000
Change %: +175%
Price: $4.03^*
Shares after: 3,635,758
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F3

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +2,313,000
Change %: +175%
Price: $4.03^*
Shares after: 3,635,758
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F3

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +2,313,000
Change %: +175%
Price: $4.03^*
Shares after: 3,635,758
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F3

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +2,313,000
Change %: +175%
Price: $4.03^*
Shares after: 3,635,758
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F3

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +2,313,000
Change %: +175%
Price: $4.03^*
Shares after: 3,635,758
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F3

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +2,313,000
Change %: +175%
Price: $4.03^*
Shares after: 3,635,758
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F3

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +2,313,000
Change %: +175%
Price: $4.03^*
Shares after: 3,635,758
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F3

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +2,313,000
Change %: +175%
Price: $4.03^*
Shares after: 3,635,758
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F3

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +2,313,000
Change %: +175%
Price: $4.03^*
Shares after: 3,635,758
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F3

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +1,506,000
Change %: +119%
Price: $4.03^*
Shares after: 2,773,545
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F4

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +1,506,000
Change %: +119%
Price: $4.03^*
Shares after: 2,773,545
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F4

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +1,506,000
Change %: +119%
Price: $4.03^*
Shares after: 2,773,545
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F4

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +1,506,000
Change %: +119%
Price: $4.03^*
Shares after: 2,773,545
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F4

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +1,506,000
Change %: +119%
Price: $4.03^*
Shares after: 2,773,545
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F4

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +1,506,000
Change %: +119%
Price: $4.03^*
Shares after: 2,773,545
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F4

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +1,506,000
Change %: +119%
Price: $4.03^*
Shares after: 2,773,545
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F4

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +1,506,000
Change %: +119%
Price: $4.03^*
Shares after: 2,773,545
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F4

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +1,506,000
Change %: +119%
Price: $4.03^*
Shares after: 2,773,545
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F4

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +1,506,000
Change %: +119%
Price: $4.03^*
Shares after: 2,773,545
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F4

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +412,000
Change %
Price: $4.03^*
Shares after: 412,000
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F5

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +412,000
Change %
Price: $4.03^*
Shares after: 412,000
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F5

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +412,000
Change %
Price: $4.03^*
Shares after: 412,000
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F5

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +412,000
Change %
Price: $4.03^*
Shares after: 412,000
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F5

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +412,000
Change %
Price: $4.03^*
Shares after: 412,000
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F5

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +412,000
Change %
Price: $4.03^*
Shares after: 412,000
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F5

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +412,000
Change %
Price: $4.03^*
Shares after: 412,000
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F5

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +412,000
Change %
Price: $4.03^*
Shares after: 412,000
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F5

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +412,000
Change %
Price: $4.03^*
Shares after: 412,000
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F5

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +412,000
Change %
Price: $4.03^*
Shares after: 412,000
Date: 14 May 2026
Ownership: Direct
Footnotes: F1, F2, F5

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +772,000
Change %
Price: $4.03^*
Shares after: 772,000
Date: 14 May 2026
Ownership: See footnote
Footnotes: F1, F2, F6

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +772,000
Change %
Price: $4.03^*
Shares after: 772,000
Date: 14 May 2026
Ownership: See footnote
Footnotes: F1, F2, F6

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +772,000
Change %
Price: $4.03^*
Shares after: 772,000
Date: 14 May 2026
Ownership: See footnote
Footnotes: F1, F2, F6

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +772,000
Change %
Price: $4.03^*
Shares after: 772,000
Date: 14 May 2026
Ownership: See footnote
Footnotes: F1, F2, F6

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +772,000
Change %
Price: $4.03^*
Shares after: 772,000
Date: 14 May 2026
Ownership: See footnote
Footnotes: F1, F2, F6

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +772,000
Change %
Price: $4.03^*
Shares after: 772,000
Date: 14 May 2026
Ownership: See footnote
Footnotes: F1, F2, F6

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +772,000
Change %
Price: $4.03^*
Shares after: 772,000
Date: 14 May 2026
Ownership: See footnote
Footnotes: F1, F2, F6

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +772,000
Change %
Price: $4.03^*
Shares after: 772,000
Date: 14 May 2026
Ownership: See footnote
Footnotes: F1, F2, F6

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +772,000
Change %
Price: $4.03^*
Shares after: 772,000
Date: 14 May 2026
Ownership: See footnote
Footnotes: F1, F2, F6

XOMA transaction

Common Stock, $0.0075 par value per share

Conversion of derivative security

Transaction value
Shares: +772,000
Change %
Price: $4.03^*
Shares after: 772,000
Date: 14 May 2026
Ownership: See footnote
Footnotes: F1, F2, F6

Reported derivative securities

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

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -2,313
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 2,313,000
Exercise price: $4.03
Footnotes: F2, F3, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -2,313
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 2,313,000
Exercise price: $4.03
Footnotes: F2, F3, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -2,313
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 2,313,000
Exercise price: $4.03
Footnotes: F2, F3, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -2,313
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 2,313,000
Exercise price: $4.03
Footnotes: F2, F3, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -2,313
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 2,313,000
Exercise price: $4.03
Footnotes: F2, F3, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -2,313
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 2,313,000
Exercise price: $4.03
Footnotes: F2, F3, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -2,313
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 2,313,000
Exercise price: $4.03
Footnotes: F2, F3, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -2,313
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 2,313,000
Exercise price: $4.03
Footnotes: F2, F3, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -2,313
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 2,313,000
Exercise price: $4.03
Footnotes: F2, F3, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -2,313
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 2,313,000
Exercise price: $4.03
Footnotes: F2, F3, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -1,506
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 1,506,000
Exercise price: $4.03
Footnotes: F2, F4, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -1,506
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 1,506,000
Exercise price: $4.03
Footnotes: F2, F4, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -1,506
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 1,506,000
Exercise price: $4.03
Footnotes: F2, F4, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -1,506
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 1,506,000
Exercise price: $4.03
Footnotes: F2, F4, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -1,506
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 1,506,000
Exercise price: $4.03
Footnotes: F2, F4, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -1,506
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 1,506,000
Exercise price: $4.03
Footnotes: F2, F4, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -1,506
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 1,506,000
Exercise price: $4.03
Footnotes: F2, F4, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -1,506
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 1,506,000
Exercise price: $4.03
Footnotes: F2, F4, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -1,506
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 1,506,000
Exercise price: $4.03
Footnotes: F2, F4, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -1,506
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 1,506,000
Exercise price: $4.03
Footnotes: F2, F4, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -412
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 412,000
Exercise price: $4.03
Footnotes: F2, F5, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -412
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 412,000
Exercise price: $4.03
Footnotes: F2, F5, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -412
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 412,000
Exercise price: $4.03
Footnotes: F2, F5, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -412
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 412,000
Exercise price: $4.03
Footnotes: F2, F5, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -412
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 412,000
Exercise price: $4.03
Footnotes: F2, F5, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -412
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 412,000
Exercise price: $4.03
Footnotes: F2, F5, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -412
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 412,000
Exercise price: $4.03
Footnotes: F2, F5, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -412
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 412,000
Exercise price: $4.03
Footnotes: F2, F5, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -412
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 412,000
Exercise price: $4.03
Footnotes: F2, F5, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -412
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 412,000
Exercise price: $4.03
Footnotes: F2, F5, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -772
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: See footnote
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 772,000
Exercise price: $4.03
Footnotes: F2, F6, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -772
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: See footnote
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 772,000
Exercise price: $4.03
Footnotes: F2, F6, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -772
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: See footnote
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 772,000
Exercise price: $4.03
Footnotes: F2, F6, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -772
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: See footnote
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 772,000
Exercise price: $4.03
Footnotes: F2, F6, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -772
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: See footnote
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 772,000
Exercise price: $4.03
Footnotes: F2, F6, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -772
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: See footnote
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 772,000
Exercise price: $4.03
Footnotes: F2, F6, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -772
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: See footnote
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 772,000
Exercise price: $4.03
Footnotes: F2, F6, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -772
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: See footnote
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 772,000
Exercise price: $4.03
Footnotes: F2, F6, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -772
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: See footnote
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 772,000
Exercise price: $4.03
Footnotes: F2, F6, F7

XOMA transaction Derivative

Series X Convertible Preferred Stock

Conversion of derivative security

Transaction value
Shares: -772
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: See footnote
Underlying class: Common Stock, $0.0075 par value per share
Underlying amount: 772,000
Exercise price: $4.03
Footnotes: F2, 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 is a member of a Section 13(d) group that collectively owns more than 10% of the Issuer's outstanding shares of Common Stock. 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

The transactions reported herein are exempt from Section 16(b) by virtue of Rule 16b-6(b).

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

Securities held in certain Partners managed accounts (the "Partners Managed Accounts"). Partners, as the investment manager of the Partners Managed Accounts, may be deemed to beneficially own the securities held by the Partners Managed Accounts. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities held by the Partners Managed Accounts. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities held by the Partners Managed Accounts.

Footnote F7

The Series X Convertible Preferred Stock are exercisable immediately do not have an expiration date.

We use cookies and similar technologies to provide certain features, enhance the user experience and, if you allow them, measure engagement and deliver advertising. Analytics and marketing storage stay off until you grant consent. By clicking on "Agree and continue", you declare your consent to the use of the selected optional cookies. to update or revoke optional consent for future visits. For more information, see our Privacy Policy .