Panacea Innovation Ltd - 17 Jul 2025 Form 4 Insider Report for Atara Biotherapeutics, Inc. (ATRA)

Role: 10%+ Owner
Signature: Panacea Innovation Limited By: /s/ James Huang, Founding Managing Partner
Issuer symbol: ATRA
Transactions as of: 17 Jul 2025
Net transactions value: +$186,372
Form type: 4
Filing time: 21 Jul 2025, 09:00:05 UTC
Previous filing: 21 May 2025
Next filing: 19 Aug 2025
SEC: View on sec.gov

Reporting Owners (2)

Name	Relationship	Address	Signature	Signature date	CIK
Panacea Innovation Ltd	10%+ Owner	C/O MAPLES CORPORATE SERVICES LIMITED,, UGLAND HOUSE, GRAND CAYMAN, CAYMAN ISLANDS	Panacea Innovation Limited By: /s/ James Huang, Founding Managing Partner	21 Jul 2025	0002010692
Huang James	Director, 10%+ Owner	C/O MAPLES CORPORATE SERVICES LIMITED,, UGLAND HOUSE, GRAND CAYMAN, CAYMAN ISLANDS	/s/ James Huang	21 Jul 2025	0001573160

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ATRA	Common Stock	Purchase	$186,372	+19,335	+1.5%	$9.64	1,350,000	17 Jul 2025	See Footnotes	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents securities held by Panacea Venture Healthcare Fund II, L.P.
F2	James Huang is the sole owner of Panacea Innovation Limited, which is the sole owner of Panacea Venture Healthcare Fund II GP Company, Ltd. ("Fund II GP") and Panacea Opportunity Fund I GP Company, Ltd. ("Opportunity Fund GP"), which are the general partners of Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P. As a result, each of the Reporting Persons 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., but each disclaims such beneficial ownership.

Content

Represents securities held by Panacea Venture Healthcare Fund II, L.P.

James Huang is the sole owner of Panacea Innovation Limited, which is the sole owner of Panacea Venture Healthcare Fund II GP Company, Ltd. ("Fund II GP") and Panacea Opportunity Fund I GP Company, Ltd. ("Opportunity Fund GP"), which are the general partners of Panacea Venture Healthcare Fund II, L.P. and Panacea Opportunity Fund I, L.P. As a result, each of the Reporting Persons 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., but each disclaims such beneficial ownership.