ATARA BIOTHERAPEUTICS INC (ATRA) Stock Ownership

NASDAQ:ATRA • US0465132068

Current stock price

4.9 USD
+0.13 (+2.73%)
At close:
4.6 USD
-0.3 (-6.12%)
After Hours:

ATRA Ownership information

ATRA Ownership Chart.ATRA Ownership Chart: showing Insider, Institutional ownership and shares available to the public.ATRA Ownership.InsiderInstitutionalPublic



Shares Outstanding8.18M
Float6.68M
Float Short Interest Percentage4.76%
Owners (insider)1.65%
Owners (institutional)45.12%
Owners (insider) change1.28%
Owners (institutional) change0%
ATRA Institutional Ownership HistoryATRA Institutional Ownership HistoryATRA Institutional Ownership History Sep 2021 Mar 2022 Sep 2022 Mar 2023 Sep 2023 Mar 2024 Sep 2024 Mar 2025 Sep 2025 Mar 2026 20M 40M 60M 80M 100M
ATRA Historical Insider Transactions ChartATRA Historical Insider Buy and Sell Transactions ChartATRA Historical Insider Transactions Jun 2025 Jul 2025 Aug 2025 Sep 2025 Oct 2025 Nov 2025 Dec 2025 Jan 2026 Feb 2026 Mar 2026 Apr 2026 May 2026 0 200K 400K 600K
DateNameTypeSharesPriceAmount
Mar 17, 2026Panacea Innovation LtdOption Excercise2591630.00$ 25.92
Mar 17, 2026Huang JamesOption Excercise2591630.00$ 25.92
Mar 17, 2026Panacea Innovation LtdOption Excercise55.23$ 26.15
Mar 17, 2026Huang JamesOption Excercise55.23$ 26.15
Mar 9, 2026Nguyen AnhCoGrant811000.00$ 0.00
Mar 9, 2026Grant-Huerta YaninaGrant203000.00$ 0.00
Mar 2, 2026Grant-Huerta YaninaOpen Market Sale21045.08$ 10,690.91
Mar 2, 2026Nguyen AnhCoOpen Market Sale29965.09$ 15,237.36
Jan 12, 2026Panacea Innovation LtdOpen Market Sale805546.07$ 489,019.17
Jan 12, 2026Huang JamesOpen Market Sale805546.07$ 489,019.17
Nov 28, 2025Panacea Innovation LtdOption Excercise487370.00$ 4.87
Nov 28, 2025Huang JamesOption Excercise487370.00$ 4.87
Nov 28, 2025Panacea Innovation LtdOption Excercise114.03$ 14.03
Nov 28, 2025Huang JamesOption Excercise114.03$ 14.03
Nov 17, 2025Nguyen AnhCoOpen Market Sale291513.19$ 38,437.30
Nov 17, 2025Grant-Huerta YaninaOpen Market Sale180413.19$ 23,788.08
Aug 18, 2025Nguyen AnhCoOpen Market Sale295811.62$ 34,360.30
Aug 18, 2025Grant-Huerta YaninaOpen Market Sale180911.61$ 21,009.37
Aug 15, 2025Panacea Innovation LtdOpen Market Purchase5500012.19$ 670,422.50
Aug 15, 2025Huang JamesOpen Market Purchase5500012.19$ 670,422.50
Jul 17, 2025Panacea Innovation LtdOpen Market Purchase193359.64$ 186,372.00
Jul 17, 2025Huang JamesOpen Market Purchase193359.64$ 186,372.00
Jun 10, 2025HEIDEN WILLIAM KGrant78280.00$ 0.00
Jun 10, 2025Gallagher Carol GiltnerGrant78280.00$ 0.00
Jun 10, 2025Fust Matthew KGrant78280.00$ 0.00
Jun 10, 2025Touchon PascalGrant78280.00$ 0.00
Jun 10, 2025Roncarolo Maria GraziaGrant78280.00$ 0.00
Jun 10, 2025MALLIK AMEETGrant78280.00$ 0.00
May 16, 2025Adiumentum Capital Fund I GP LLCGrant755726.61$ 499,530.92
May 16, 2025Ciongoli Gregory AustinGrant755726.61$ 499,530.92
May 16, 2025Grant-Huerta YaninaOpen Market Sale22186.76$ 15,000.33
May 16, 2025Nguyen AnhCoOpen Market Sale32766.76$ 22,155.59
May 16, 2025Adiumentum Capital Fund I LPGrant755726.61$ 499,530.92