ATRA

Atara Biotherapeutics, Inc.

Biological Products, (No Diagnostic Substances)NasdaqNon-accelerated filer<br>Smaller reporting company

Total Trades

Buys

Sells

Largest Trade

N/A

Insiders

Institutional Funds

Inst. Value

$1M+

Activist Filings

Insider Trades

Insider	Title	Type	Value	Shares	Price	Date
Koppikar Utpal	CFO	SELL	$15K–$50K	6K	$5.63	Jun 10, 2022
Murugan Amar	SVP, GC & Secretary	SELL	$15K–$50K	3K	$5.32	May 19, 2022
Koppikar Utpal	CFO	SELL	$15K–$50K	6K	$5.32	May 19, 2022
Dupont Jakob	EVP, Head of R&D	SELL	$15K–$50K	4K	$5.32	May 19, 2022
Touchon Pascal	President and CEO	SELL	$50K–$100K	14K	$5.32	May 19, 2022
Koppikar Utpal	CFO	SELL	$15K–$50K	4K	$9.86	Mar 4, 2022
Koppikar Utpal	CFO	GRANT	N/A	61K	—	Mar 4, 2022
Dupont Jakob	EVP, Head of R&D	GRANT	N/A	79K	—	Mar 4, 2022
Dupont Jakob	EVP, Head of R&D	SELL	$15K–$50K	2K	$9.86	Mar 4, 2022
Touchon Pascal	President and CEO	SELL	$50K–$100K	9K	$9.86	Mar 4, 2022
Touchon Pascal	President and CEO	GRANT	N/A	181K	—	Mar 4, 2022
Murugan Amar	SVP, GC & Secretary	SELL	$15K–$50K	3K	$9.86	Mar 4, 2022
Murugan Amar	SVP, GC & Secretary	GRANT	N/A	52K	—	Mar 4, 2022
Dupont Jakob	EVP, Head of R&D	SELL	$50K–$100K	5K	$16.00	Feb 14, 2022
Dupont Jakob	EVP, Head of R&D	EXERCISE	$15K–$50K	5K	$9.58	Feb 14, 2022
Koppikar Utpal	CFO	SELL	$15K–$50K	2K	$14.46	Feb 9, 2022
Dupont Jakob	EVP, Head of R&D	EXERCISE	$15K–$50K	5K	$9.58	Jan 5, 2022
Dupont Jakob	EVP, Head of R&D	SELL	$50K–$100K	5K	$16.01	Jan 5, 2022

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13F filings as of Dec 31, 2025 · 29 funds holding

Fund	Shares	Value	Type
Redmile Group, LLC	442K	$1M+	SH
VANGUARD GROUP INC	191K	$1M+	SH
GLOBEFLEX CAPITAL L P	77K	$1M+	SH
MACKENZIE FINANCIAL CORP	59K	$1M+	SH
ACADIAN ASSET MANAGEMENT LLC	54K	$500K+	SH
GEODE CAPITAL MANAGEMENT, LLC	51K	$500K+	SH
STALEY CAPITAL ADVISERS INC	50K	$500K+	SH
RENAISSANCE TECHNOLOGIES LLC	30K	$500K+	SH
STATE STREET CORP	26K	$100K–$500K	SH
Cambridge Investment Research Advisors, Inc.	23K	$100K–$500K	SH
Point72 Asset Management, L.P.	18K	$100K–$500K	SH
Walleye Capital LLC	12K	$100K–$500K	SH
Connor, Clark & Lunn Investment Management Ltd.	10K	$100K–$500K	SH
JANE STREET GROUP, LLC	10K	$100K–$500K	SH
DIMENSIONAL FUND ADVISORS LP	8K	$100K–$500K	SH
SBI Securities Co., Ltd.	1K	$15K–$50K	SH
UBS Group AG	1K	$15K–$50K	SH
MARSHALL WACE, LLP	1K	$15K–$50K	SH
Private Wealth Asset Management, LLC	900	$15K–$50K	SH
BlackRock, Inc.	535	$1K–$15K	SH