BIOTECHNOLOGY VALUE FUND L P - 31 Mar 2026 SCHEDULE 13D/A Report for MoonLake Immunotherapeutics Class A ordinary share, par value $0.0001 per share (MLTX)

Filing Manager
BIOTECHNOLOGY VALUE FUND L P
Reporting Manager
BVF PARTNERS L P/IL
Security
MoonLake Immunotherapeutics Class A ordinary share, par value $0.0001 per share
Symbol
MLTX
Shares outstanding
71,754,637 shares
Disclosed Ownership
16,001,284 shares
Ownership
22%
Form type
SCHEDULE 13D/A
Filing time
02 Apr 2026, 16:44:28 UTC
Date of event
31 Mar 2026
Previous filing
10 Nov 2025
SEC
View on sec.gov

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Quoteable Key Fact

"BIOTECHNOLOGY VALUE FUND L P disclosed 22% ownership in MoonLake Immunotherapeutics Class A ordinary share, par value $0.0001 per share (MLTX) on 31 Mar 2026."

Quick Takeaways

  • BIOTECHNOLOGY VALUE FUND L P filed SCHEDULE 13D/A for MoonLake Immunotherapeutics Class A ordinary share, par value $0.0001 per share (MLTX).
  • Disclosed ownership: 22%.
  • Date of event: 31 Mar 2026.

What Changed

  • Previous schedule filing date: 10 Nov 2025.
  • Current filing was accepted on 02 Apr 2026, 16:44.

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 (11)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
BIOTECHNOLOGY VALUE FUND L P 12% 8,302,735 0 8,302,735 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory 0000918923
BVF I GP LLC 12% 8,302,735 0 8,302,735 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory 0001803805
BIOTECHNOLOGY VALUE FUND II LP 9.2% 6,599,722 0 6,599,722 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory 0001102444
BVF II GP LLC 9.2% 6,599,722 0 6,599,722 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory 0001803806
Biotechnology Value Trading Fund OS LP 1.4% 1,039,238 0 1,039,238 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory 0001660683
BVF Partners OS Ltd. 1.4% 1,039,238 0 1,039,238 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory 0001660684
BVF GP HOLDINGS LLC 21% 14,902,457 0 14,902,457 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory 0001803809
BVF PARTNERS L P/IL 22% 16,001,284 0 16,001,284 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory 0001055947
BVF INC/IL 22% 16,001,284 0 16,001,284 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory 0001056807
LAMPERT MARK N 22% 16,001,284 0 16,001,284 /s/ Mark N. Lampert Mark N. Lampert 0001233840
Loy Spike 0.03% 18,985 18,985 0 /s/ Spike Loy Spike Loy 0001920549

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