LAMPERT MARK N 4
4 · XOMA Royalty Corp · Filed May 18, 2026
Research Summary
AI-generated summary of this filing
XOMA — BVF Partners (10% Owner) Converts Derivatives to Acquire 5.00M Shares
What Happened
- BVF Partners L.P. (part of a reporting group that collectively owns >10% of XOMA) converted derivative securities into a total of 5,003,000 shares of XOMA common stock on 2026-05-14. The conversions were recorded at $4.03 per share, for an aggregate value of $20,162,090.
- The Form 4 also reports matching zero-dollar “dispositions” of small derivative lots (2,313; 1,506; 412; 772), as recorded in the filing in connection with the conversions. The filing was submitted jointly by multiple related BVF entities and individuals.
Key Details
- Transaction date: 2026-05-14 (Period of Report); Form filed 2026-05-18.
- Price and value: 5,003,000 shares acquired at $4.03 per share; total reported value $20,162,090.
- Shares owned after transaction: not specified in the provided excerpt; the reporting group is disclosed as a >10% beneficial owner (see footnote F1).
- Notable footnotes: joint filing by several BVF entities and Mark N. Lampert (F1); transactions exempt from Section 16(b) under Rule 16b‑6(b) (F2); Series X Convertible Preferred Stock are exercisable immediately and have no expiration date (F7).
- Timeliness: Form 4 was filed 4 days after the transaction date (file date 2026-05-18 for a 2026-05-14 transaction); the filing does not show a late-report designation.
Context
- This is an institutional conversion by a 10% holder (not an individual executive trade). Conversions of convertible preferred/derivative securities into common stock are a structural transaction (not an open-market purchase) and can increase the public float.
- The filing does not indicate any immediate sale of the converted shares; no open-market sales of common stock by the reporting persons are recorded on this Form 4.
Insider Transaction Report
Form 4
BVF PARTNERS L P/IL
10% Owner
Transactions
- Conversion
Common Stock, $0.0075 par value per share
[F1][F2][F3]2026-05-14$4.03/sh+2,313,000$9,321,390→ 3,635,758 total - Conversion
Common Stock, $0.0075 par value per share
[F1][F2][F4]2026-05-14$4.03/sh+1,506,000$6,069,180→ 2,773,545 total - Conversion
Common Stock, $0.0075 par value per share
[F1][F2][F5]2026-05-14$4.03/sh+412,000$1,660,360→ 412,000 total - Conversion
Common Stock, $0.0075 par value per share
[F1][F2][F6]2026-05-14$4.03/sh+772,000$3,111,160→ 772,000 total(indirect: See footnote) - Conversion
Series X Convertible Preferred Stock
[F2][F7][F3]2026-05-14−2,313→ 0 totalExercise: $4.03→ Common Stock, $0.0075 par value per share (2,313,000 underlying) - Conversion
Series X Convertible Preferred Stock
[F2][F7][F4]2026-05-14−1,506→ 0 totalExercise: $4.03→ Common Stock, $0.0075 par value per share (1,506,000 underlying) - Conversion
Series X Convertible Preferred Stock
[F2][F7][F5]2026-05-14−412→ 0 totalExercise: $4.03→ Common Stock, $0.0075 par value per share (412,000 underlying) - Conversion
Series X Convertible Preferred Stock
[F2][F7][F6]2026-05-14−772→ 0 total(indirect: See footnote)Exercise: $4.03→ Common Stock, $0.0075 par value per share (772,000 underlying)
Footnotes (7)
- [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.
- [F2]The transactions reported herein are exempt from Section 16(b) by virtue of Rule 16b-6(b).
- [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.
- [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.
- [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.
- [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.
- [F7]The Series X Convertible Preferred Stock are exercisable immediately do not have an expiration date.