Vault-13

ATARA BIOTHERAPEUTICS INC

COM · CUSIP 046513107

119 institutional holders -6 vs Q1 2023
90,163,29590.2m shares reported held*
$145.4mreported value*
22 new 36 added 43 reduced 29 sold out net sold ≈ $19.9m (-12.4m shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($486.6k this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $1.61. Options: 7 managers hold calls ($2.2m notional), 6 hold puts ($36.7k).

Trends to Q2 2023

Institutional holders

Managers reporting a position, each quarter

0100200Q3 22: 155Q4 22: 140Q1 23: 125Q2 23: 119119Q3 22Q4 22Q1 23Q2 23
Numbers
QuarterHolders
Q3 2022155
Q4 2022140
Q1 2023125
Q2 2023119

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
1000100Q4 22: 61 bought or addedQ4 22: 79 cut or sold outQ4 22Q1 23: 61 bought or addedQ1 23: 64 cut or sold outQ1 23Q2 23: 58 bought or addedQ2 23: 72 cut or sold outQ2 23
Numbers
QuarterBought or addedCut or sold out
Q4 20226179
Q1 20236164
Q2 20235872

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$2m$4m$6mQ3 22 calls: $114.0kQ3 22 puts: $342.0kQ3 22P/C 3.00Q4 22 calls: $5.1mQ4 22 puts: $25.6kQ4 22P/C 0.00Q1 23 calls: $4.9mQ1 23 puts: $76.7kQ1 23P/C 0.02Q2 23 calls: $2.2mQ2 23 puts: $36.7kQ2 23P/C 0.02
Numbers
QuarterCallsPutsP/C
Q3 2022$114.0k$342.0k3.00
Q4 2022$5.1m$25.6k0.00
Q1 2023$4.9m$76.7k0.02
Q2 2023$2.2m$36.7k0.02

Biggest buyers

MILLENNIUM MANAGEMENT LLC Added +1,055,769+1.1m
683 Capital Management, LLC New +1,000,000+1.0m
ACADIAN ASSET MANAGEMENT LLC New +704,694+704.7k
RENAISSANCE TECHNOLOGIES LLC Added +679,200+679.2k
BAUPOST GROUP LLC/MA Added +650,000+650.0k
Point72 Asset Management, L.P. Added +544,973+545.0k
Redmile Group, LLC Added +436,067+436.1k
JANE STREET GROUP, LLC Added +423,514+423.5k
STALEY CAPITAL ADVISERS INC Added +300,000+300.0k
HRT FINANCIAL LP New +161,929+161.9k

Biggest sellers

STATE STREET CORP Reduced -5,695,411-5.7m
GOLDMAN SACHS GROUP INC Reduced -2,109,699-2.1m
Nuveen Asset Management, LLC Reduced -1,598,392-1.6m
BANK OF AMERICA CORP /DE/ Reduced -1,132,963-1.1m
CITADEL ADVISORS LLC Reduced -1,118,435-1.1m
BlackRock Inc. Reduced -1,008,049-1.0m
DIMENSIONAL FUND ADVISORS LP Reduced -776,369-776.4k
BAKER BROS. ADVISORS LP Sold out -744,186-744.2k
Rafferty Asset Management, LLC Sold out -710,258-710.3k
JACOBS LEVY EQUITY MANAGEMENT, INC Reduced -637,928-637.9k

Biggest calls

CITADEL ADVISORS LLC Reduced $1.2m768.3k shares
GROUP ONE TRADING LLC Reduced $674.3k418.8k shares
MAVERICK CAPITAL LTD Reduced $291.6k181.1k shares
Cutler Group LLC / CA Added $12.0k23.1k shares
Belvedere Trading LLC New $11.6k7.2k shares
SIMPLEX TRADING, LLC Reduced $1.0k1.0k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Biggest puts

CITADEL ADVISORS LLC Added $21.9k13.6k shares
Cutler Group LLC / CA Added $10.0k3.0k shares
SIMPLEX TRADING, LLC Reduced $3.0k1.9k shares
GROUP ONE TRADING LLC Reduced $1.6k1.0k shares
Belvedere Trading LLC New $161100 shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Adiumentum Capital Fund I LP 13D · may seek influence filed 2025-05-16
Stated purposeItem 4 of the Initial 13D is hereby amended and supplemented to add the following information: On May 14, 2025, Adiumentum agreed to purchase from the Issuer in connection with a registered offering (the "Registered Offering") an aggregate of (i) 75,572 shares (the "Shares") of the Issuer's common stock, par value $0.0001 per share (the "Common Stock"), and (ii) pre-funded warrants (each, a "Pre-Funded Warrant", and together, the "Pre-Funded Warrants") to purchase up to 227,000 shares of Common Stock, at a purchase price of $6.61 per share of Common Stock and $6.6099 per share of Common Stock issuable upon exercise of the Pre-Funded Warrants. The exercise price of each Pre-Funded Warrant is equal to $0.0001 per share, subject to adjustment as provided therein, and the Pre-Funded Warrants … Full filing
 20.0% 1.4m 2025-05-16
Panacea Innovation Ltd 13D · may seek influence -3.9 pts · filed 2026-05-11 16.1% -3.9 pts 1.3m 2026-05-11

Holders, Q2 2023

#ManagerLocationShares Value% of their portfolioChangeShares change
1 BAUPOST GROUP LLC/MA 0.28% of their portfolio BOSTON, MA 9,773,6169.8m $15.7m $15.7m 0.28% Added +650.0k +650,000
2 WASATCH ADVISORS LP 0.08% of their portfolio SALT LAKE CITY, UT 8,283,9818.3m $13.3m $13.3m 0.08% Reduced -70.3k -70,340
3 BlackRock Inc. 0.00% of their portfolio New York, NY 8,263,2498.3m $13.3m $13.3m 0.00% Reduced -1.0m -1,008,049
4 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 7,720,2537.7m $12.4m $12.4m 0.00% Added +64.5k +64,484
5 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 6,946,3316.9m $11.2m $11.2m 0.00% Added +91.1k +91,145
6 MAVERICK CAPITAL LTD 0.22% of their portfolio DALLAS, TX 6,290,7136.3m $10.1m $10.1m 0.22% Unchanged
7 Redmile Group, LLC 0.37% of their portfolio LARKSPUR, CA 6,048,1236.0m $9.7m $9.7m 0.37% Added +436.1k +436,067
8 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 4,562,0044.6m $7.3m $7.3m 0.00% Reduced -2.1m -2,109,699
9 D. E. Shaw & Co., Inc. 0.01% of their portfolio New York, NY 4,349,3284.3m $7.0m $7.0m 0.01% Added +119.5k +119,521
10 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 2,542,0622.5m $4.1m $4.1m 0.00% Reduced -5.7m -5,695,411
11 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 2,502,7752.5m $4.0m $4.0m 0.00% Reduced -444.5k -444,461
12 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 2,116,9002.1m $3.4m $3.4m 0.00% Added +679.2k +679,200
13 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 2,031,5532.0m $3.3m $3.3m 0.00% Added +117.0k +116,975
14 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 1,564,5641.6m $2.5m $2.5m 0.00% Added +1.1m +1,055,769
15 AMERIPRISE FINANCIAL INC 0.00% of their portfolio MINNEAPOLIS, MN 1,148,6341.1m $1.8m $1.8m 0.00% Reduced -331.2k -331,231
16 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 1,133,2831.1m $1.8m $1.8m 0.00% Reduced -1.1m -1,118,435
17 683 Capital Management, LLC 0.16% of their portfolio NEW YORK, NY 1,000,0001.0m $1.6m $1.6m 0.16% New
18 Antipodean Advisors LLC 11.42% of their portfolio New York, NY 1,000,0001.0m $1.6m $1.6m 11.42% Unchanged
19 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 795,241795.2k $1.3m $1.3m 0.00% Reduced -81.6k -81,623
20 STALEY CAPITAL ADVISERS INC 0.07% of their portfolio PITTSBURGH, PA 750,000750.0k $1.2m $1.2m 0.07% Added +300.0k +300,000
21 ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio Boston, MA 704,694704.7k $1.1m $1.1m 0.00% New
22 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 700,035700.0k $1.1m $1.1m 0.00% Added +40.0k +39,961
23 NORGES BANK 0.00% of their portfolio OSLO, Q8 698,507698.5k $1.1m $1.1m 0.00% Reduced -517.7k -517,706
24 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 688,192688.2k $1.1m $1.1m 0.00% Reduced -20.1k -20,050
25 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 655,773655.8k $1.1m $1.1m 0.00% Reduced -776.4k -776,369
26 Point72 Asset Management, L.P. 0.00% of their portfolio STAMFORD, CT 572,231572.2k $921.3k $921.3k 0.00% Added +545.0k +544,973
27 Pacific Heights Asset Management LLC 0.08% of their portfolio San Francisco, CA 525,000525.0k $845.2k $845.2k 0.08% Unchanged
28 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 481,745481.7k $775.6k $775.6k 0.00% Reduced -429.5k -429,474
29 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 441,771441.8k $711.3k $711.3k 0.00% Added +423.5k +423,514
30 ExodusPoint Capital Management, LP 0.01% of their portfolio NEW YORK, NY 417,882417.9k $673.0k $673.0k 0.01% Added +144.4k +144,398
31 PINNACLE ASSOCIATES LTD 0.01% of their portfolio NEW YORK, NY 395,594395.6k $636.9k $636.9k 0.01% Reduced -3.7k -3,722
32 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 339,443339.4k $546.5k $546.5k 0.00% Added +13.9k +13,871
33 Cubist Systematic Strategies, LLC 0.00% of their portfolio STAMFORD, CT 276,565276.6k $445.3k $445.3k 0.00% Added +72.2k +72,215
34 FMR LLC 0.00% of their portfolio BOSTON, MA 223,707223.7k $360.2k $360.2k 0.00% Reduced -33.4k -33,391
35 PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.00% of their portfolio COLUMBUS, OH 188,581188.6k $304.0k $304.0k 0.00% Unchanged
36 RAYMOND JAMES & ASSOCIATES 0.00% of their portfolio ST PETERSBURG, FL 187,345187.3k $301.6k $301.6k 0.00% Reduced -1.6k -1,558
37 Hennion & Walsh Asset Management, Inc. 0.02% of their portfolio Parsippany, NJ 179,137179.1k $288.0k $288.0k 0.02% Reduced -90.0k -90,009
38 SVB WEALTH LLC 0.01% of their portfolio BOSTON, MA 176,867176.9k $284.8k $284.8k 0.01% Unchanged
39 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 176,700176.7k $284.5k $284.5k 0.00% Added +57.9k +57,860
40 JOSH ARNOLD INVESTMENT CONSULTANT, LLC 0.27% of their portfolio EDINA, MN 170,000170.0k $273.7k $273.7k 0.27% Added +115.0k +115,000
41 AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio Greenwich, CT 167,279167.3k $269.3k $269.3k 0.00% Added +116.3k +116,315
42 HRT FINANCIAL LP 0.00% of their portfolio NEW YORK, NY 161,929161.9k $260.0k $260.0k 0.00% New
43 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 157,150157.2k $253.0k $253.0k 0.00% Reduced -64.6k -64,555
44 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 142,773142.8k $229.9k $229.9k 0.00% Reduced -4.6k -4,599
45 XTX Topco Ltd 0.04% of their portfolio LONDON, X0 136,841136.8k $220.3k $220.3k 0.04% New
46 HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.00% of their portfolio TORONTO, A6 121,000121.0k $194.8k $194.8k 0.00% New
47 CORNERCAP INVESTMENT COUNSEL INC 0.03% of their portfolio Atlanta, GA 116,159116.2k $187.0k $187.0k 0.03% New
48 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio NEW YORK, NY 108,004108.0k $313.2k $313.2k 0.00% Unchanged
49 VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio ATLANTA, GA 101,713101.7k $163.8k $163.8k 0.00% Added +27.0k +27,009
50 Legal & General Group Plc 0.00% of their portfolio London, X0 101,098101.1k $162.8k $162.8k 0.00% Added +85.9k +85,939
51 Y-Intercept (Hong Kong) Ltd 0.02% of their portfolio HONG KONG, K3 99,68599.7k $160.5k $160.5k 0.02% New
52 B. Metzler seel. Sohn & Co. AG 0.00% of their portfolio FRANKFURT, 2M 98,56498.6k $158.7k $158.7k 0.00% Added +49.3k +49,282
53 Graham Capital Management, L.P. 0.00% of their portfolio ROWAYTON, CT 85,67285.7k $137.9k $137.9k 0.00% New
54 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 81,33781.3k $131.0k $131.0k 0.00% Reduced -1.1m -1,132,963
55 PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio BALTIMORE, MD 76,62476.6k $124.0k $124.0k 0.00% Added +1.8k +1,758
56 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 75,64075.6k $121.8k $121.8k 0.00% Reduced -182.3k -182,266
57 Squarepoint Ops LLC 0.00% of their portfolio NEW YORK, NY 72,57472.6k $116.8k $116.8k 0.00% Reduced -34.2k -34,207
58 Allspring Global Investments Holdings, LLC 0.00% of their portfolio CHARLOTTE, NC 66,40466.4k $106.9k $106.9k 0.00% Added +21.3k +21,301
59 Nuveen Asset Management, LLC 0.00% of their portfolio CHICAGO, IL 63,72063.7k $102.6k $102.6k 0.00% Reduced -1.6m -1,598,392
60 Private Advisor Group, LLC 0.00% of their portfolio MORRISTOWN, NJ 62,40062.4k $100.5k $100.5k 0.00% New
61 MARSHALL WACE, LLP 0.00% of their portfolio LONDON, X0 62,18062.2k $100.1k $100.1k 0.00% New
62 CAXTON ASSOCIATES LP 0.01% of their portfolio NEW YORK, NY 56,15156.2k $90.4k $90.4k 0.01% Reduced -49.3k -49,321
63 Rockefeller Capital Management L.P. 0.00% of their portfolio NEW YORK, NY 53,93653.9k $86.8k $86.8k 0.00% First filing
64 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 51,69751.7k $83.0k $83.0k 0.00% Added +6.1k +6,054
65 UBS Group AG 0.00% of their portfolio ZURICH, V8 51,37551.4k $82.7k $82.7k 0.00% Reduced -283.2k -283,212
66 HARBOR CAPITAL ADVISORS, INC. 0.02% of their portfolio CHICAGO, IL 50,07650.1k $80.6k $80.6k 0.02% New
67 MetLife Investment Management, LLC 0.00% of their portfolio Whippany, NJ 49,73049.7k $80.1k $80.1k 0.00% Unchanged
68 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 49,53349.5k $79.7k $79.7k 0.00% Reduced -74.1k -74,102
69 AMERICAN INTERNATIONAL GROUP, INC. 0.00% of their portfolio New York, NY 45,97746.0k $74.0k $74.0k 0.00% Added +481 +481
70 SIMPLEX TRADING, LLC 0.00% of their portfolio CHICAGO, IL 45,26445.3k $72.0k $72.0k 0.00% Added +32.1k +32,113
71 STATE OF WISCONSIN INVESTMENT BOARD 0.00% of their portfolio MADISON, WI 45,20145.2k $72.8k $72.8k 0.00% Reduced -170.4k -170,381
72 MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio Toronto, A6 43,08643.1k $69.4k $69.4k 0.00% Added +6.1k +6,093
73 NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio ALBANY, NY 39,37039.4k $63.4k $63.4k 0.00% Reduced -219 -219
74 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 35,35335.4k $56.9k $56.9k 0.00% Reduced -365.2k -365,210
75 Qube Research & Technologies Ltd 0.00% of their portfolio LONDON, X0 34,90834.9k $56.2k $56.2k 0.00% New
76 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio WEST SACRAMENTO, CA 31,77631.8k $51.2k $51.2k 0.00% Reduced -74.0k -73,988
77 Vanguard Personalized Indexing Management, LLC 0.00% of their portfolio OAKLAND, CA 31,42331.4k $50.6k $50.6k 0.00% New
78 STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.00% of their portfolio TALLAHASSEE, FL 31,14531.1k $50.1k $50.1k 0.00% Unchanged
79 PRINCIPAL FINANCIAL GROUP INC 0.00% of their portfolio DES MOINES, IA 30,06730.1k $48.4k $48.4k 0.00% Added +3.3k +3,320
80 ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio Berwyn, PA 29,58529.6k $47.6k $47.6k 0.00% Reduced -2.2k -2,242
81 Centiva Capital, LP 0.00% of their portfolio New York, NY 29,14329.1k $46.9k $46.9k 0.00% New
82 FRANKLIN RESOURCES INC 0.00% of their portfolio San Mateo, CA 29,10029.1k $46.9k $46.9k 0.00% Reduced -282 -282
83 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 28,85828.9k $46.5k $46.5k 0.00% Reduced -3.6k -3,565
84 DIMENSION CAPITAL MANAGEMENT LLC 0.01% of their portfolio Coral Gables, FL 28,00028.0k $45.1k $45.1k 0.01% Added +14.0k +14,000
85 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 26,66926.7k $42.9k $42.9k 0.00% Added +17.6k +17,628
86 Point72 Middle East FZE 0.00% of their portfolio DUBAI, C0 25,35125.4k $40.8k $40.8k 0.00% New
87 OPPENHEIMER & CO INC 0.00% of their portfolio NEW YORK, NY 22,57522.6k $36.3k $36.3k 0.00% Reduced -3.7k -3,722
88 Erste Asset Management GmbH 0.00% of their portfolio VIENNA, C4 22,00022.0k $35.9k $35.9k 0.00% Unchanged
89 Ergoteles LLC 0.00% of their portfolio NEW YORK, NY 20,32620.3k $32.7k $32.7k 0.00% New
90 PITCAIRN CO 0.00% of their portfolio CONSHOHOCKEN, PA 19,36319.4k $31.2k $31.2k 0.00% New
91 ProShare Advisors LLC 0.00% of their portfolio BETHESDA, MD 18,76318.8k $30.2k $30.2k 0.00% Added +1.0k +1,017
92 LETKO, BROSSEAU & ASSOCIATES INC 0.00% of their portfolio MONTREAL, A8 17,50017.5k $28.2k $28.2k 0.00% Unchanged
93 JACOBS LEVY EQUITY MANAGEMENT, INC 0.00% of their portfolio FLORHAM PARK, NJ 16,92716.9k $27.3k $27.3k 0.00% Reduced -637.9k -637,928
94 SEI INVESTMENTS CO 0.00% of their portfolio OAKS, PA 15,82115.8k $25.5k $25.5k 0.00% Reduced -11.7k -11,670
95 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 15,26115.3k $24.6k $24.6k 0.00% New
96 AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio KANSAS CITY, MO 14,62814.6k $23.6k $23.6k 0.00% Reduced -8.0k -7,990
97 Wealth Architects, LLC 0.00% of their portfolio MOUNTAIN VIEW, CA 13,27713.3k $21.4k $21.4k 0.00% Unchanged
98 Belvedere Trading LLC 0.01% of their portfolio CHICAGO, IL 12,91312.9k $20.8k $20.8k 0.01% New
99 STIFEL FINANCIAL CORP 0.00% of their portfolio ST. LOUIS, MO 12,48012.5k $20.1k $20.1k 0.00% Reduced -16.0k -16,012
100 Virtu Financial LLC 0.00% of their portfolio New York, NY 12,25012.2k $20.0k $20.0k 0.00% New