SR ONE CAPITAL MANAGEMENT, LLC - 09 Oct 2025 SCHEDULE 13D/A Report for Zenas BioPharma, Inc. Common Stock, $0.0001 par value (ZBIO)

Filing Manager
SR ONE CAPITAL MANAGEMENT, LLC
Reporting Manager
SR One Capital Management, LLC
Security
Zenas BioPharma, Inc. Common Stock, $0.0001 par value
Symbol
ZBIO
Shares outstanding
53,594,191 shares
Disclosed Ownership
5,037,854 shares
Ownership
9.4%
Form type
SCHEDULE 13D/A
Filing time
14 Oct 2025, 17:29:18 UTC
Date of event
09 Oct 2025
SEC
View on sec.gov

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Quoteable Key Fact

"SR ONE CAPITAL MANAGEMENT, LLC disclosed 9.4% ownership in Zenas BioPharma, Inc. Common Stock, $0.0001 par value (ZBIO) on 09 Oct 2025."

Quick Takeaways

  • SR ONE CAPITAL MANAGEMENT, LLC filed SCHEDULE 13D/A for Zenas BioPharma, Inc. Common Stock, $0.0001 par value (ZBIO).
  • Disclosed ownership: 9.4%.
  • Date of event: 09 Oct 2025.

What Changed

  • No earlier schedule filing is available for direct comparison.
  • Current filing was accepted on 14 Oct 2025, 17:29.

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 (8)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
SR One Capital Management, LLC 9.4% 5,037,854 0 5,037,854 /s/ Sasha Keough Sasha Keough, as attorney-in-fact for Simeon George, M.D., Managing Member 0001853723
SR One Capital Fund II Aggregator, LP 3.6% 1,946,564 0 1,946,564 /s/ Sasha Keough Sasha Keough, as attorney-in-fact for Simeon George, M.D., Managing Member
SR One Capital Partners II, LP 3.6% 1,946,564 0 1,946,564 /s/ Sasha Keough Sasha Keough, as attorney-in-fact for Simeon George, M.D., Managing Member
AMZL, LP 3.6% 1,917,895 0 1,917,895 /s/ Sasha Keough Sasha Keough, as attorney-in-fact for Simeon George, M.D., Managing Member
SR One Capital SMA Partners, LP 3.6% 1,917,895 0 1,917,895 /s/ Sasha Keough Sasha Keough, as attorney-in-fact for Simeon George, M.D., Managing Member
SR One Capital Opportunities Fund I, LP 2.2% 1,173,395 0 1,173,395 /s/ Sasha Keough Sasha Keough, as attorney-in-fact for Simeon George, M.D., Managing Member
SR One Capital Opportunities Partners I, LP 2.2% 1,173,395 0 1,173,395 /s/ Sasha Keough Sasha Keough, as attorney-in-fact for Simeon George, M.D., Managing Member
Simeon George 9.4% 5,037,854 0 5,037,854 /s/ Sasha Keough Sasha Keough, as attorney-in-fact for Simeon George, M.D.

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