BIOTECHNOLOGY VALUE FUND L P - 31 Dec 2025 SCHEDULE 13G/A Report for Xencor Inc Common Stock, par value $0.01 per share (XNCR)

Filing Manager
BIOTECHNOLOGY VALUE FUND L P
Reporting Manager
BVF PARTNERS L P/IL
Security
Xencor Inc Common Stock, par value $0.01 per share
Symbol
XNCR
Shares outstanding
71,408,609 shares
Disclosed Ownership
7,133,720 shares
Ownership
10%
Form type
SCHEDULE 13G/A
Filing time
17 Feb 2026, 16:32:09 UTC
Date of event
31 Dec 2025
Previous filing
17 Oct 2025
SEC
View on sec.gov

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Quoteable Key Fact

"BIOTECHNOLOGY VALUE FUND L P disclosed 10% ownership in Xencor Inc Common Stock, par value $0.01 per share (XNCR) on 31 Dec 2025."

Quick Takeaways

  • BIOTECHNOLOGY VALUE FUND L P filed SCHEDULE 13G/A for Xencor Inc Common Stock, par value $0.01 per share (XNCR).
  • Disclosed ownership: 10%.
  • Date of event: 31 Dec 2025.

What Changed

  • Previous schedule filing date: 17 Oct 2025.
  • Current filing was accepted on 17 Feb 2026, 16:32.

Why This Matters

  • This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
  • You can verify ownership claims directly against the original SEC filing.

Official SEC Source

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

See Original Filing

Reporting Managers (10)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
BIOTECHNOLOGY VALUE FUND L P 5.3% 3,798,627 0 3,798,627 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF I GP LLC 5.3% 3,798,627 0 3,798,627 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BIOTECHNOLOGY VALUE FUND II LP 3.9% 2,787,735 0 2,787,735 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF II GP LLC 3.9% 2,787,735 0 2,787,735 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
Biotechnology Value Trading Fund OS LP 0.6% 439,372 0 439,372 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF Partners OS Ltd. 0.6% 439,372 0 439,372 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF GP HOLDINGS LLC 9.2% 6,586,362 0 6,586,362 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF PARTNERS L P/IL 10% 7,133,720 0 7,133,720 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF INC/IL 10% 7,133,720 0 7,133,720 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
LAMPERT MARK N 10% 7,133,720 0 7,133,720 /s/ Mark N. Lampert Mark N. Lampert

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