BIOTECHNOLOGY VALUE FUND L P - 31 Mar 2025 SCHEDULE 13G/A Report for Septerna, Inc. Common Stock, $0.001 par value per share (SEPN)

Filing Manager
BIOTECHNOLOGY VALUE FUND L P
Reporting Manager
BVF PARTNERS L P/IL
Security
Septerna, Inc. Common Stock, $0.001 par value per share
Symbol
SEPN
Shares outstanding
44,405,293 shares
Disclosed Ownership
4,396,124 shares
Ownership
9.9%
Form type
SCHEDULE 13G/A
Filing time
15 May 2025, 16:37:36 UTC
Date of event
31 Mar 2025
Next filing
17 Feb 2026
SEC
View on sec.gov

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Quoteable Key Fact

"BIOTECHNOLOGY VALUE FUND L P disclosed 9.9% ownership in Septerna, Inc. Common Stock, $0.001 par value per share (SEPN) on 31 Mar 2025."

Quick Takeaways

  • BIOTECHNOLOGY VALUE FUND L P filed SCHEDULE 13G/A for Septerna, Inc. Common Stock, $0.001 par value per share (SEPN).
  • Disclosed ownership: 9.9%.
  • Date of event: 31 Mar 2025.

What Changed

  • No earlier schedule filing is available for direct comparison.
  • Current filing was accepted on 15 May 2025, 16:37.

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 5.2% 2,299,671 0 2,299,671 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF I GP LLC 5.2% 2,299,671 0 2,299,671 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BIOTECHNOLOGY VALUE FUND II LP 4.1% 1,804,322 0 1,804,322 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF II GP LLC 4.1% 1,804,322 0 1,804,322 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
Biotechnology Value Trading Fund OS LP 0.5% 233,426 0 233,426 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF Partners OS Ltd. 0.5% 233,426 0 233,426 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF GP HOLDINGS LLC 9.2% 4,103,993 0 4,103,993 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF PARTNERS L P/IL 9.9% 4,396,124 0 4,396,124 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF INC/IL 9.9% 4,396,124 0 4,396,124 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
LAMPERT MARK N 9.9% 4,396,124 0 4,396,124 /s/ Mark N. Lampert Mark N. Lampert

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