Atara Biotherapeutics, Inc. — SCHEDULE 13D/A Filings
4 SCHEDULE 13D/A filings on record
This page lists all SCHEDULE 13D/A filings submitted to the SEC by Atara Biotherapeutics, Inc. (ATRA), sorted by most recent first. Each row links to the full filing on EdgarLookup. Atara Biotherapeutics, Inc. has filed 4 SCHEDULE 13D/A documents with the SEC since 2015. To view all SEC filings by Atara Biotherapeutics, Inc., see the full filings list.
All
10-K
10-K/A
10-Q
144
3
4
4/A
424B1
424B3
424B4
424B5
8-A12B
8-K
CERTNAS
CORRESP
CT ORDER
DEF 14A
DEFA14A
DEFR14A
DEL AM
DRS
DRS/A
DRSLTR
EFFECT
FWP
POS AM
POSASR
PRE 14A
S-1
S-1/A
S-1MEF
S-3
S-3ASR
S-8
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SCHEDULE 13D
SCHEDULE 13D/A
SCHEDULE 13G
SCHEDULE 13G/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| SCHEDULE 13D/A | — | 0001193125-26-013362 | Jan 14, 2026 | — |
| SCHEDULE 13D/A | — | 0001104659-25-112574 | Nov 14, 2025 | — |
| SCHEDULE 13D/A | — | 0000950170-25-110311 | Aug 19, 2025 | — |
| SCHEDULE 13D/A | — | 0001104659-25-050119 | May 16, 2025 | — |