Schedule 13D ownership disclosure

ATARA BIOTHERAPEUTICS INC

Common Stock, par value $0.0001 per share · CUSIP: 046513107

Event date: 2025-05-14

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares
Unavailable
Percent of class
Unavailable
  • Adiumentum Capital Fund I LPReported CIK 0002023734

    Shares: 1,370,081.00 · Class: 19.99%

  • Adiumentum Capital Fund I GP LLCReported CIK 0002023736

    Shares: 1,370,081.00 · Class: 19.99%

  • Gregory A. CiongoliReported CIK 0002023732

    Shares: 1,370,081.00 · Class: 19.99%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.

Source: SEC EDGAR filing

Filing metadata

Accession number
0001104659-25-050119
Form type
SCHEDULE 13D/A
Filer
Adiumentum Capital Fund I LP
CIK
CIK 2023734
Filed
May 16, 2025
Reporting period
May 14, 2025
Description
Schedule 13D beneficial ownership

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