Redmile Group, LLC

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

Symbol: ATRA on Nasdaq
Investment type: Equity / Common Stock
Latest Disclosed Shares Owned: 751,223 shares
Security Ownership %: 9.9%

Shares, Excluding Options vs Price

Value, Excluding Options

Redmile Group, LLC ownership in Atara Biotherapeutics, Inc. Common Stock (ATRA)

14 Nov 2025 - Redmile Group, LLC has filed an SCHEDULE 13D/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 751,223 shares of Atara Biotherapeutics, Inc. Common Stock (ATRA). This represents 9.9% ownership of the company. In their previous filing dated 23 May 2025, Redmile Group, LLC had reported owning 705,207 shares, indicating an increase of +6.5%. .

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filing time
Redmile Group, LLC	9.9%	0%	$10,764,875	751,223	+46,016	+6.5%	$14.33	13D/A	12 Nov 2025	14 Nov 2025, 16:19
Redmile Group, LLC	9.9%	0%	$5,359,573	705,207	+103,964	+17%	$7.60	13D	16 May 2025	23 May 2025, 16:05
Redmile Group, LLC	9.9%		$4,569,447	601,243			$7.60	13G/A	31 Mar 2025	15 May 2025, 21:00

Holdings date	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
31 Dec 2025	0.59%	0%	$7,990,371	441,701	0		$18.09	Q4 2025
30 Sep 2025	0.62%	0%	$6,329,575	441,701	0		$14.33	Q3 2025
30 Jun 2025	0.36%	0%	$3,409,932	441,701	0		$7.72	Q2 2025
31 Mar 2025	0.25%	0%	$2,623,704	441,701	0		$5.94	Q1 2025
31 Dec 2024	0.41%	-0.01%	$5,879,040	441,701	-10,569	-2.3%	$13.31	Q4 2024
30 Sep 2024	0.22%	0%	$3,676,955	452,270	0		$8.13	Q3 2024
30 Jun 2024	0.23%	+0.14%	$3,844,295	452,270	+452,270	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.