Panacea Innovation Ltd bought ATRA

March 17, 2026 · Form 4 insider transaction

Panacea Innovation Ltd bought 259,163 shares of Atara Biotherapeutics, Inc. at $0.00 per share, a transaction worth $25.92. The trade was recorded as option exercise and disclosed on an SEC Form 4, filed 2 days after the transaction.

Direction
Acquired (buy-side)
Shares
259,163
Price
$0.00
Total value
$25.92
Role10% owner
SecurityCommon Stock
Transaction codeM: Option exercise
Transaction dateMarch 17, 2026
Filing dateMarch 19, 2026
Shares owned after307,899
OwnershipIndirect
10b5-1 planNo
AmendedNo

Footnotes

Represents securities held by Panacea Opportunity Fund I, 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.

View the original Form 4 on SEC EDGAR