Ciongoli Gregory Austin 4
4 · Atara Biotherapeutics, Inc. · Filed Jun 11, 2026
Research Summary
AI-generated summary of this filing
Atara (ATRA) Director Gregory Ciongoli Receives 12,000 RSUs
What Happened
- Gregory A. Ciongoli, a director of Atara Biotherapeutics and reported 10% owner, received a grant of 12,000 restricted stock units (RSUs) on 2026-06-09. The award is reported at $0.00 per share (total reported value $0) and is coded as an award/grant (A). This is a compensation-style grant rather than an open-market purchase or sale.
Key Details
- Transaction date and terms: 12,000 RSUs granted on 2026-06-09 at $0.00 per share (reported value $0).
- Vesting: RSUs vest on the earlier of June 9, 2027 or the date of the next annual meeting of stockholders, subject to Mr. Ciongoli’s continuous service (Footnote F1).
- Shares owned after transaction: Not specified in the provided filing excerpts.
- Reporting structure: Footnote F2 explains certain securities are held by Adiumentum Capital Fund I LP and related entities; those entities are excluded as reporting persons for this RSU award because they have no pecuniary interest in these RSUs.
- Filing timeliness: Form 4 filed 2026-06-11 for a 2026-06-09 transaction (filed within the typical 2-business-day window).
Context
- RSUs are a deferred-compensation award that typically convert to shares only after vesting and do not involve an immediate cash purchase or sale. Director RSU grants are common as compensation and do not by themselves indicate buying or selling sentiment. Mr. Ciongoli’s 10% ownership and the involvement of Adiumentum (per F2) reflect institutional ownership relationships separate from this personal RSU award.
Insider Transaction Report
Form 4
Ciongoli Gregory Austin
Director10% OwnerOther
Transactions
- Award
Common Stock
[F1]2026-06-09+12,000→ 12,000 total
Holdings
- 1,209,395(indirect: See Footnote)
Common Stock
[F2]
Footnotes (2)
- [F1]These restricted stock units shall vest on the earlier of June 9, 2027 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service.
- [F2]The securities reported on this row are directly held by Adiumentum Capital Fund I LP, a limited partnership organized under the laws of Delaware ("Adiumentum"). Adiumentum Capital Fund I GP LLC, a limited liability company organized under the laws of Delaware ("Adiumentum GP"), is the general partner of Adiumentum. Gregory A. Ciongoli is the managing partner of Adiumentum and the managing member of Adiumentum GP. Each of Adiumentum, Adiumentum GP, and Mr. Ciongoli may be deemed to have the shared power to vote or direct the vote (and the shared power to dispose or direct the disposition of) the securities that are directly held by Adiumentum. Each of Adiumentum, Adiumentum GP, and Mr. Ciongoli may be deemed to have a pecuniary interest in the securities that are directly held by Adiumentum, but disclaims any beneficial ownership of such securities, except to the extent of any pecuniary interest therein.
Signature
/s/ John Chao, Attorney-in-Fact for Gregory A. Ciongoli|2026-06-11