CITADEL ADVISORS LLC

Holdings History for Atara Biotherapeutics, Inc. - Common Stock (ATRA)

Symbol: ATRA on Nasdaq
Investment type: Equity / Common Stock

Shares, Excluding Options vs Price

Value, Excluding Options

Holdings date	Option	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
31 Dec 2025		0%	+0%	$281,788	15,577	+15,577	NEW	$18.09	Q4 2025
30 Sep 2025			-0%	$0	0	-23,003	-100%	$4.45	Q3 2025
30 Jun 2025		0%	+0%	$177,583	23,003	+23,003	NEW	$7.72	Q2 2025
31 Mar 2025			-0%	$0	0	-267,353	-100%	$4.45	Q1 2025
31 Dec 2024		0%	+0%	$3,558,469	267,353	+6,873	+2.6%	$13.31	Q4 2024
30 Sep 2024		0%	0%	$2,117,702	260,480	0		$8.13	Q3 2024
30 Sep 2024	call		-0%	$0	0	-520	-100%	$4.45	Q3 2024
30 Sep 2024	put		0%	$0	0	-208	-100%	$4.45	Q3 2024
30 Jun 2024		0%	+0%	$2,214,080	260,480	+260,480	NEW	$8.50	Q2 2024
30 Jun 2024	call	0%	+0%	$4,420	520	+520	NEW	$8.50	Q2 2024
30 Jun 2024	put	0%	0%	$1,768	208	+208	NEW	$8.50	Q2 2024

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.