Atara Biotherapeutics, Inc. - ATRA

Insiders (Form 4) · last 180 days · showing up to 200 transactions · Form 144 is shown in the SEC filings tab · Updating…
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Transaction codes: P = Open-market purchase · S = Open-market sale · A = Grant/award · M = Exercise/conversion of derivative · G = Gift · F = Tax withholding · J = Other · A/D: A = Acquired (buy/receive) · D = Disposed (sell/give)
Filed Owner Title Code A/D Shares Price Value Shares after SEC
Jun 15, 2026 A A 24,000.0 0.0 0.0 62,320.0 View
Jun 11, 2026 A A 12,000.0 0.0 0.0 34,188.0 View
Jun 11, 2026 A A 12,000.0 0.0 0.0 30,188.0 View
Jun 11, 2026 A A 12,000.0 0.0 0.0 12,000.0 View
May 20, 2026 President and CEO S D 5,241.0 9.1289 47,844.56 137,837.0 View
May 20, 2026 Chief Accounting Officer S D 2,414.0 9.1286 22,036.44 49,636.0 View
May 11, 2026 S D 313,446.0 10.0975 3,165,020.99 1,011,000.0 View
May 11, 2026 P A 507,407.0 9.35 4,744,255.45 1,552,000.0 View
Mar 19, 2026 M D 259,163.0 6.6099 1,713,041.51 0.0 View
Mar 19, 2026 F D 5.0 5.23 26.15 307,894.0 View
Mar 19, 2026 M A 259,163.0 0.0001 25.92 307,899.0 View
Mar 11, 2026 Chief Accounting Officer A A 20,300.0 0.0 0.0 52,050.0 View
Mar 11, 2026 President and CEO A A 81,100.0 0.0 0.0 143,078.0 View
Mar 04, 2026 President and CEO S D 1,442.0 5.087 7,335.45 61,978.0 View
Mar 04, 2026 President and CEO S D 1,298.0 5.086 6,601.63 63,420.0 View
Mar 04, 2026 President and CEO S D 58.0 5.08 294.64 64,718.0 View
Mar 04, 2026 President and CEO S D 198.0 5.079 1,005.64 64,776.0 View
Mar 04, 2026 Chief Accounting Officer S D 100.0 5.083 508.3 31,750.0 View
Mar 04, 2026 Chief Accounting Officer S D 377.0 5.082 1,915.91 31,850.0 View
Mar 04, 2026 Chief Accounting Officer S D 1,603.0 5.081 8,144.84 32,227.0 View
Mar 04, 2026 Chief Accounting Officer S D 24.0 5.077 121.85 33,830.0 View
Jan 14, 2026 S D 80,554.0 6.0707 489,019.17 1,324,446.0 View