Panacea Innovation Ltd - 12 Jan 2026 SCHEDULE 13D/A Report for Atara Biotherapeutics, Inc. Common Stock (ATRA)

Filing Manager
Panacea Innovation Ltd
Reporting Manager
Panacea Innovation Limited
Security
Atara Biotherapeutics, Inc. Common Stock
Symbol
ATRA
Shares outstanding
8,165,808 shares
Disclosed Ownership
1,632,345 shares
Ownership
20%
Form type
SCHEDULE 13D/A
Filing time
14 Jan 2026, 21:20:14 UTC
Date of event
12 Jan 2026
Previous filing
19 Aug 2025
SEC
View on sec.gov

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Quoteable Key Fact

"Panacea Innovation Ltd disclosed 20% ownership in Atara Biotherapeutics, Inc. Common Stock (ATRA) on 12 Jan 2026."

Quick Takeaways

  • Panacea Innovation Ltd filed SCHEDULE 13D/A for Atara Biotherapeutics, Inc. Common Stock (ATRA).
  • Disclosed ownership: 20%.
  • Date of event: 12 Jan 2026.

What Changed

  • Previous schedule filing date: 19 Aug 2025.
  • Current filing was accepted on 14 Jan 2026, 21:20.

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
Panacea Innovation Limited 20% 1,632,345 0 1,632,345 /s/ James Huang James Huang, Founding Managing Partner 0002010692
Panacea Venture Healthcare Fund II, L.P. 18% 1,324,446 0 1,324,446 By: Panacea Venture Healthcare Fund II GP Company, Ltd., its general partner By: Panacea Innovation Limited, its sole owner By: /s/ James Huang James Huang, Founding Managing Partner 0001869939
Panacea Venture Healthcare Fund II GP Company, Ltd. 18% 1,324,446 0 1,324,446 By: Panacea Innovation Limited, its sole owner By: /s/ James Huang James Huang, Founding Managing Partner
Panacea Opportunity Fund I, L.P. 4.1% 307,899 0 307,899 By: Panacea Opportunity Fund I GP Company, Ltd., its general partner By: Panacea Innovation Limited, its sole owner By: /s/ James Huang James Huang, Founding Managing Partner 0001869966
Panacea Opportunity Fund I GP Company, Ltd. 4.1% 307,899 0 307,899 By: Panacea Innovation Limited, its sole owner By: /s/ James Huang James Huang, Founding Managing Partner
James Huang 20% 1,632,345 0 1,632,345 /s/ James Huang James Huang 0001573160

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