Vault-13

ATARA BIOTHERAPEUTICS INC

COM · CUSIP 046513107

5 institutional holders -78 vs Q1 2024
182,077182.1k shares reported held*
$1.5mreported value*
1 new 0 added 2 reduced 79 sold out net sold ≈ $740.7m (-87.1m 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. Holder counts are more reliable. Implied quarter-end price ≈ $8.30.

Trends to Q2 2024

Institutional holders

Managers reporting a position, each quarter

0100200Q3 22: 155Q4 22: 140Q1 23: 125Q2 23: 119Q3 23: 110Q4 23: 92Q1 24: 83Q2 24: 55Q3 22Q1 23Q3 23Q1 24Q2 24
Numbers
QuarterHolders
Q3 2022155
Q4 2022140
Q1 2023125
Q2 2023119
Q3 2023110
Q4 202392
Q1 202483
Q2 20245

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 outQ2 23: 58 bought or addedQ2 23: 72 cut or sold outQ2 23Q3 23: 52 bought or addedQ3 23: 59 cut or sold outQ4 23: 48 bought or addedQ4 23: 67 cut or sold outQ4 23Q1 24: 44 bought or addedQ1 24: 52 cut or sold outQ2 24: 1 bought or addedQ2 24: 81 cut or sold outQ2 24
Numbers
QuarterBought or addedCut or sold out
Q4 20226179
Q1 20236164
Q2 20235872
Q3 20235259
Q4 20234867
Q1 20244452
Q2 2024181

Calls vs puts

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

CallsPuts
$0$500k$1m$1.5m$2mQ3 23 calls: $1.8mQ3 23 puts: $98.4kQ3 23P/C 0.05Q4 23 calls: $22.6kQ4 23 puts: $27.1kQ4 23P/C 1.20Q1 24 calls: $33.4kQ1 24 puts: $39.0kQ1 24P/C 1.17Q2 24 calls: $0Q2 24 puts: $0Q2 24P/C —
Numbers
QuarterCallsPutsP/C
Q3 2023$1.8m$98.4k0.05
Q4 2023$22.6k$27.1k1.20
Q1 2024$33.4k$39.0k1.17
Q2 2024$0$0—

Biggest buyers

Biggest sellers

EcoR1 Capital, LLC Sold out -10,167,043-10.2m
Redmile Group, LLC Sold out -9,263,309-9.3m
BlackRock Inc. Sold out -6,831,479-6.8m
BANK OF AMERICA CORP /DE/ Sold out -6,580,577-6.6m
CITADEL ADVISORS LLC Sold out -6,512,063-6.5m
VANGUARD GROUP INC Sold out -5,012,938-5.0m
PRICE T ROWE ASSOCIATES INC /MD/ Sold out -4,958,150-5.0m
MORGAN STANLEY Sold out -4,038,387-4.0m
Boxer Capital, LLC Reduced -3,984,000-4.0m
Vestal Point Capital, LP Sold out -2,800,000-2.8m

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 2024

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Boxer Capital, LLC 0.07% of their portfolio San Diego, CA 166,000166.0k $1.4m $1.4m 0.07% Reduced -4.0m -3,984,000
2 LAKE STREET ADVISORS GROUP, LLC 0.00% of their portfolio PORTSMOUTH, NH 11,00011.0k $93.5k $93.5k 0.00% Unchanged
3 IFP Advisors, Inc 0.00% of their portfolio TAMPA, FL 4,5004.5k $1.8k $1.8k 0.00% Unchanged
4 CWM, LLC 0.00% of their portfolio OMAHA, NE 542542 $5.0k $5.0k 0.00% Reduced -19.4k -19,404
5 EverSource Wealth Advisors, LLC 0.00% of their portfolio BIRMINGHAM, AL 3535 $344 $344 0.00% New