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ATRA

Atara Biotherapeutics, Inc. SEC filings
Biological Products, (No Diagnostic Substances) · Nasdaq · Incorporated in DE
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Filing history
2026-09-04
Insider trade 4
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2026-08-26
Planned insider sale 144
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2026-08-26
Insider trade 4
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2026-08-14
Passive 5%+ stake update SCHEDULE 13G/A
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2026-08-12
Quarterly report 10-Q
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2026-08-12
Current report 8-K
Earnings results
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2026-07-24
Insider trade 4
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2026-07-24
5%+ stake update (13D) SCHEDULE 13D/A
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2026-07-06
New insider's holdings 3
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2026-06-26
Current report 8-K
Exec/director change
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2026-06-15
Insider trade 4
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2026-06-15
New insider's holdings 3
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2026-06-12
Employee stock plan shares S-8
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2026-06-12
Current report 8-K
Exec/director changeShareholder vote
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2026-06-11
Insider trade 4
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2026-06-11
Insider trade 4
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2026-06-11
Insider trade 4
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2026-05-20
Insider trade 4
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2026-05-20
Insider trade 4
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2026-05-18
Planned insider sale 144
Filing ↗
2026-05-18
Planned insider sale 144
Filing ↗
2026-05-14
5%+ stake update (13D) SCHEDULE 13D/A
Filing ↗
2026-05-13
Passive 5%+ stake SCHEDULE 13G
Filing ↗
2026-05-12
Prospectus 424B5
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2026-05-12
Quarterly report 10-Q
Filing ↗
2026-05-12
Current report 8-K
Filing ↗
2026-05-11
5%+ stake update (13D) SCHEDULE 13D/A
Filing ↗
2026-05-11
Insider trade 4
Filing ↗
2026-05-11
Insider trade 4
Filing ↗
2026-05-11
New insider's holdings 3
Filing ↗
2026-05-08
Passive 5%+ stake SCHEDULE 13G
Filing ↗
2026-05-07
Planned insider sale 144
Filing ↗
2026-05-07
Passive 5%+ stake update SCHEDULE 13G/A
Filing ↗
2026-05-07
Current report 8-K
Other event
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2026-05-01
Current report 8-K
Listing notice (delisting or exchange move)
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2026-04-24
Proxy statement (shareholder vote) DEF 14A
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2026-04-24
Proxy material DEFA14A
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2026-03-25
EFFECT EFFECT
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2026-03-25
Prospectus 424B3
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2026-03-23
CORRESP CORRESP
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