Longitude Capital Partners IV, LLC - 09 Oct 2025 SCHEDULE 13D/A Report for ZENAS BIOPHARMA, INC. Common Stock, $0.0001 par value per share (ZBIO)

Filing Manager
Longitude Capital Partners IV, LLC
Reporting Manager
Patrick G. Enright
Security
ZENAS BIOPHARMA, INC. Common Stock, $0.0001 par value per share
Symbol
ZBIO
Shares outstanding
53,704,531 shares
Disclosed Ownership
2,631,522 shares
Ownership
4.9%
Form type
SCHEDULE 13D/A
Filing time
14 Oct 2025, 09:35:24 UTC
Date of event
09 Oct 2025
SEC
View on sec.gov

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Quoteable Key Fact

"Longitude Capital Partners IV, LLC disclosed 4.9% ownership in ZENAS BIOPHARMA, INC. Common Stock, $0.0001 par value per share (ZBIO) on 09 Oct 2025."

Quick Takeaways

  • Longitude Capital Partners IV, LLC filed SCHEDULE 13D/A for ZENAS BIOPHARMA, INC. Common Stock, $0.0001 par value per share (ZBIO).
  • Disclosed ownership: 4.9%.
  • 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, 09:35.

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 (6)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Longitude Capital Partners IV, LLC 3.4% 1,832,669 0 1,832,669 /s/ Cristiana Blauth Oliveira Cristiana Blauth Oliveira, Authorized Signatory 0001829169
Longitude Venture Partners IV, L.P. 3.4% 1,832,669 0 1,832,669 By Longitude Capital Partners IV, LLC, General Partner, /s/ Cristiana Blauth Oliveira Cristiana Blauth Oliveira, Authorized Signatory 0001787456
Longitude Prime Partners, LLC 1.4% 774,530 0 774,530 /s/ Cristiana Blauth Oliveira Cristiana Blauth Oliveira, Authorized Signatory 0001865779
Longitude Prime Fund, L.P. 1.4% 774,530 0 774,530 By Longitude Prime Partners, LLC, General Partner, /s/ Cristiana Blauth Oliveira Cristiana Blauth Oliveira, Authorized Signatory 0001865844
Patrick G. Enright 4.9% 2,631,522 24,323 2,607,199 /s/ Cristiana Blauth Oliveira, as attorney-in-fact for Patrick G. Enright Cristiana Blauth Oliveira, as attorney-in-fact for Patrick G. Enright 0001253886
Juliet Tammenoms Bakker 4.9% 2,607,199 0 2,607,199 /s/ Cristiana Blauth Oliveira, as attorney-in-fact for Juliet Tammenoms Bakker Cristiana Blauth Oliveira, as attorney-in-fact for Juliet Tammenoms Bakker 0001431159

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