Quick Takeaways
- Panacea Innovation Ltd filed SCHEDULE 13D/A for Atara Biotherapeutics, Inc. Common Stock (ATRA).
- Disclosed ownership: 20%.
- Date of event: 15 Aug 2025.
Panacea Innovation Ltd - 15 Aug 2025 SCHEDULE 13D/A Report for Atara Biotherapeutics, Inc. Common Stock (ATRA)
- Filing Manager
- Panacea Innovation Ltd
- Reporting Manager
- Panacea Innovation Limited
- Symbol
- ATRA
- Shares outstanding
- 8,564,500 shares
- Disclosed Ownership
- 1,712,900 shares
- Ownership
- 20%
- Form type
- SCHEDULE 13D/A
- Filing time
- 19 Aug 2025, 20:15:03 UTC
- Date of event
- 15 Aug 2025
- Previous filing
- 21 May 2025
- Next filing
- 14 Jan 2026
- SEC
- View on sec.gov
Quoteable Key Fact
"Panacea Innovation Ltd disclosed 20% ownership in Atara Biotherapeutics, Inc. Common Stock (ATRA) on 15 Aug 2025."
What Changed
- Previous schedule filing date: 21 May 2025.
- Current filing was accepted on 19 Aug 2025, 20:15.
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 FilingReporting Managers (6)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Panacea Innovation Limited | 20% | 1,712,900 | 0 | 1,712,900 | /s/ James Huang | James Huang, Founding Managing Partner | 0002010692 |
| Panacea Venture Healthcare Fund II, L.P. | 20% | 1,405,000 | 0 | 1,405,000 | 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. | 20% | 1,405,000 | 0 | 1,405,000 | By: Panacea Innovation Limited, its sole owner, By: /s/ James Huang | James Huang, Founding Managing Partner | |
| Panacea Opportunity Fund I, L.P. | 4.2% | 307,900 | 0 | 307,900 | 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. | 4.2% | 307,900 | 0 | 307,900 | By: Panacea Innovation Limited, its sole owner, By: /s/ James Huang | James Huang, Founding Managing Partner | |
| James Huang | 20% | 1,712,900 | 0 | 1,712,900 | /s/ James Huang | James Huang | 0001573160 |