Atara Biotherapeutics, Inc.
16.10%
1,318,894
1604464
May 6, 2026
May 11, 2026, 06:49 PM
Reporting Persons (6)
This is a joint filing. The reported shares may overlap between reporting persons and should not be summed.
| Name | Type | % of Class | Aggregate | Sole Voting | Shared Voting |
|---|---|---|---|---|---|
| Panacea Innovation Limited | CO | 16.10% | 1,318,894 | 0 | 1,318,894 |
| James Huang | Individual | 16.10% | 1,318,894 | 0 | 1,318,894 |
| Panacea Venture Healthcare Fund II, L.P. | Partnership | 12.40% | 1,011,000 | 0 | 1,011,000 |
| Panacea Venture Healthcare Fund II GP Company, Ltd. | CO | 12.40% | 1,011,000 | 0 | 1,011,000 |
| Panacea Opportunity Fund I, L.P. | Partnership | 3.80% | 307,899 | 0 | 307,899 |
| Panacea Opportunity Fund I GP Company, Ltd. | CO | 3.80% | 307,899 | 0 | 307,899 |
Disclosure Items (2)
Common Stock
Atara Biotherapeutics, Inc.
1280 Rancho Conejo Blvd, Thousand Oaks, CA, 91320
The information contained on the cover pages is incorporated by reference into this Item 5. Panacea Venture Healthcare Fund II, L.P. is the record holder of 1,011,000 shares of Common Stock, and Panacea Opportunity Fund I, L.P. is the record holder of 307,894 shares of Common Stock. The ownership information presented herein represents beneficial ownership of Common Stock as of the date of this filing, based upon 8,178,114 shares of Common Stock outstanding as of March 10, 2026 as disclosed in the Issuer's Definitive Proxy Statement filed with the Securities and Exchange Commission on April 24, 2026. James Huang is the sole owner of Panacea Innovation Limited, which is the sole owner of Panacea Venture Healthcare Fund II GP Company, Ltd. and Panacea Opportunity Fund I GP Company, Ltd., which are the general partners of Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P., respectively. As a result, Panacea Venture Healthcare Fund II GP Company, Ltd. and Panacea Opportunity Fund I GP Company, Ltd. may be deemed to share beneficial ownership of the securities held of record by Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P., respectively. Panacea Innovation Limited and Mr. Huang may be deemed to share beneficial ownership of the securities beneficially owned by the foregoing entities, but each disclaims such beneficial ownership.
The information contained on the cover pages is incorporated by reference into this Item 5.
On May 7, 2026, Panacea Venture Healthcare Fund II, L.P. sold 313,446 shares of Common Stock in open market transactions at a weighted average price of $10.0975 per share. The Reporting Persons undertake to provide, upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price for this transaction.
None.
Not applicable