Nguyen AnhCo - Insider Non-Derivative Transactions at Atara Biotherapeutics, Inc. (ATRA) - (SEC)

Updated on January 3, 2026.

According to recent SEC insider information filed on Nov 17, 2025, Nguyen AnhCo's relationship to Atara Biotherapeutics, Inc. (ATRA) is Director,Officer (President and CEO), and currently has 65,030 shares of Common Stock.

The chart below shows the number of shares owned, and the table shows the recent insider transactions.

You can see similar information for other ATRA insiders.

Related Topics: SEC Topic List.

Data Source: SEC.

Nguyen AnhCo - Insider Non-Derivative Transactions of ATRA Common Stock

Nguyen AnhCo - Insider Non-Derivative Transactions at ATRA

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Date	Transaction	No. of Shares	Price Per Share	Shares Owned After Transactions
Nov 18, 2025	Sell -- (Common Stock)	56	13.19	64974
Nov 18, 2025	Sell -- (Common Stock)	2859	13.19	65030
Aug 19, 2025	Sell -- (Common Stock)	1620	11.62	67889
Aug 19, 2025	Sell -- (Common Stock)	1281	11.62	69509
Aug 19, 2025	Sell -- (Common Stock)	57	11.61	70790
May 17, 2025	Sell -- (Common Stock)	3276	6.76	70847
Mar 4, 2025	Sell -- (Common Stock)	3331	7	74123
Nov 19, 2024	Sell -- (Common Stock)	1664	11.2	77454
Sep 10, 2024	Acquisition -- (Common Stock)	45000	0	79118
Aug 17, 2024	Sell -- (Common Stock)	56	6.63	34118
Aug 17, 2024	Sell -- (Common Stock)	297	6.63	34174
Aug 17, 2024	Sell -- (Common Stock)	1468	6.63	34471
May 17, 2024	Sell -- (Common Stock)	42899	0.62	898498
Mar 5, 2024	Sell -- (Common Stock)	10746	0.72	941397
Jan 9, 2024	Acquisition -- (Common Stock)	675000	0	952143
Nov 17, 2023	Sell -- (Common Stock)	8856	0.39	277143
Aug 17, 2023	Sell -- (Common Stock)	9277	1.65	285999
Aug 17, 2023	Sell -- (Common Stock)	5849	1.65	295276