Vault-13

ATAIBECKLEY INC ATAI

COM SHS · Common Stock · CUSIP 04650F101

178 institutional holders +158 vs Q4 2025
98,603,66598.6m shares reported held*
$349.0mreported value*
157 new 6 added 2 reduced 6 sold out net bought ≈ $278.6m (+78.7m 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 ($2.0m this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $3.54. Options: 9 managers hold calls ($8.8m notional), 4 hold puts ($1.3m).

Trends to Q1 2026

Institutional holders

Managers reporting a position, each quarter

0100200Q4 25: 20Q1 26: 178178Q4 25Q1 26
Numbers
QuarterHolders
Q4 202520
Q1 2026178

Calls vs puts

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

CallsPuts
$0$2.5m$5m$7.5m$10mQ2 25 calls: $0Q2 25 puts: $0Q2 25P/C —Q3 25 calls: $0Q3 25 puts: $0Q3 25P/C —Q4 25 calls: $0Q4 25 puts: $0Q4 25P/C —Q1 26 calls: $8.8mQ1 26 puts: $1.3mQ1 26P/C 0.15
Numbers
QuarterCallsPutsP/C
Q2 2025$0$0—
Q3 2025$0$0—
Q4 2025$0$0—
Q1 2026$8.8m$1.3m0.15

Biggest buyers

Deep Track Capital, LP New +12,000,000+12.0m
UBS Group AG New +7,426,867+7.4m
BlackRock, Inc. New +6,835,300+6.8m
ADAGE CAPITAL PARTNERS GP, L.L.C. New +5,642,758+5.6m
SUSQUEHANNA INTERNATIONAL GROUP, LLP New +5,286,326+5.3m
MILLENNIUM MANAGEMENT LLC New +4,364,096+4.4m
MORGAN STANLEY New +3,852,772+3.9m
Candriam S.C.A. New +3,086,379+3.1m
Qube Research & Technologies Ltd New +2,891,942+2.9m
Foresite Capital Management VI LLC New +2,750,000+2.8m

Biggest sellers

ARK Investment Management LLC Sold out -3,305,997-3.3m
PRICE T ROWE ASSOCIATES INC /MD/ Sold out -465,352-465.4k
MARSHALL WACE, LLP Reduced -310,671-310.7k
FreeGulliver LLC Sold out -62,500-62.5k
Quadrature Capital Ltd Sold out -47,848-47.8k
THOROUGHBRED FINANCIAL SERVICES, LLC Reduced -13,394-13.4k
T. Rowe Price Investment Management, Inc. Sold out -7,368-7.4k
HOLLENCREST CAPITAL MANAGEMENT Sold out -600-600

Biggest calls

GROUP ONE TRADING LLC New $3.3m937.7k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP New $1.9m547.2k shares
SIMPLEX TRADING, LLC New $1.5m426.7k shares
CITADEL ADVISORS LLC New $924.6k261.2k shares
JANE STREET GROUP, LLC New $339.1k95.8k shares
NOMURA HOLDINGS INC New $297.0k83.9k shares
GOLDMAN SACHS GROUP INC New $283.2k80.0k shares
DLD Asset Management, LP New $118.9k33.6k shares
Point72 Asset Management, L.P. New $73.3k20.7k shares

Biggest puts

SUSQUEHANNA INTERNATIONAL GROUP, LLP New $589.8k166.6k shares
CITADEL ADVISORS LLC New $375.6k106.1k shares
GROUP ONE TRADING LLC New $204.6k57.8k shares
SIMPLEX TRADING, LLC New $137.4k38.8k 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.

No one currently above 5% in the filings since 19 Dec 2024.

Fell to 5% or below in the last year: Apeiron Investment Group Ltd. (0.0%, 2026-09-14)

Holders, Q1 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Deep Track Capital, LP 0.88% of their portfolio GREENWICH, CT 12,000,00012.0m $42.5m $42.5m 0.88% New
2 VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio MALVERN, PA 11,761,39811.8m $41.6m $41.6m 0.00% First filing
3 UBS Group AG 0.00% of their portfolio ZURICH, V8 7,426,8677.4m $26.3m $26.3m 0.00% New
4 BlackRock, Inc. 0.00% of their portfolio New York, NY 6,835,3006.8m $24.2m $24.2m 0.00% New
5 ADAGE CAPITAL PARTNERS GP, L.L.C. 0.03% of their portfolio Boston, MA 5,642,7585.6m $20.0m $20.0m 0.03% New
6 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.02% of their portfolio BALA CYNWYD, PA 5,286,3265.3m $18.7m $18.7m 0.02% New
7 MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio NEW YORK, NY 4,364,0964.4m $15.4m $15.4m 0.01% New
8 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 3,852,7723.9m $13.6m $13.6m 0.00% New
9 Candriam S.C.A. 0.06% of their portfolio STRASSEN, N4 3,086,3793.1m $10.9m $10.9m 0.06% New
10 Qube Research & Technologies Ltd 0.01% of their portfolio LONDON, X0 2,891,9422.9m $10.2m $10.2m 0.01% New
11 Foresite Capital Management VI LLC 2.12% of their portfolio WEST HOLLYWOOD, CA 2,750,0002.8m $9.7m $9.7m 2.12% New
12 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 2,509,9742.5m $8.9m $8.9m 0.00% New
13 MARSHALL WACE, LLP 0.01% of their portfolio LONDON, X0 2,364,4462.4m $8.4m $8.4m 0.01% Reduced -310.7k -310,671
14 RTW INVESTMENTS, LP 0.07% of their portfolio NEW YORK, NY 2,000,0002.0m $7.1m $7.1m 0.07% New
15 TWO SIGMA INVESTMENTS, LP 0.01% of their portfolio NEW YORK, NY 1,975,5522.0m $7.0m $7.0m 0.01% New
16 Newtyn Management, LLC 0.67% of their portfolio NEW YORK, NY 1,781,7031.8m $6.3m $6.3m 0.67% New
17 Eagle Health Investments LP 1.27% of their portfolio Greenwich, CT 1,709,3591.7m $6.1m $6.1m 1.27% New
18 VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio MALVERN, PA 1,256,7311.3m $4.4m $4.4m 0.00% First filing
19 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 1,181,5831.2m $4.2m $4.2m 0.00% New
20 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 1,144,3551.1m $4.1m $4.1m 0.00% New
21 MOORE CAPITAL MANAGEMENT, LP 0.12% of their portfolio NEW YORK, NY 952,380952.4k $3.4m $3.4m 0.12% New
22 ADAR1 Capital Management, LLC 0.19% of their portfolio AUSTIN, TX 913,242913.2k $3.2m $3.2m 0.19% New
23 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 819,664819.7k $2.9m $2.9m 0.00% New
24 CenterBook Partners LP 0.13% of their portfolio GREENWICH, CT 707,369707.4k $2.5m $2.5m 0.13% New
25 Point72 Asset Management, L.P. 0.00% of their portfolio STAMFORD, CT 664,724664.7k $2.4m $2.4m 0.00% New
26 AMERIPRISE FINANCIAL INC 0.00% of their portfolio MINNEAPOLIS, MN 618,620618.6k $2.2m $2.2m 0.00% New
27 Woodline Partners LP 0.01% of their portfolio San Francisco, CA 600,000600.0k $2.1m $2.1m 0.01% New
28 AdvisorShares Investments LLC 0.37% of their portfolio BETHESDA, MD 567,587567.6k $2.0m $2.0m 0.37% New
29 Sumitomo Mitsui Trust Group, Inc. 0.00% of their portfolio CHIYODA-KU, TOKYO, M0 567,576567.6k $2.0m $2.0m 0.00% New
30 Amova Asset Management Americas, Inc. 0.03% of their portfolio New York, NY 567,576567.6k $2.0m $2.0m 0.03% Added +106.1k +106,140
31 Man Group plc 0.00% of their portfolio LONDON, X0 543,515543.5k $1.9m $1.9m 0.00% New
32 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 538,050538.0k $1.9m $1.9m 0.00% New
33 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 520,905520.9k $1.8m $1.8m 0.00% New
34 Squarepoint Ops LLC 0.00% of their portfolio NEW YORK, NY 469,693469.7k $1.7m $1.7m 0.00% New
35 OP Asset Management Ltd 0.02% of their portfolio HELSINKI, H9 423,674423.7k $1.5m $1.5m 0.02% New
36 ORBIMED ADVISORS LLC 0.03% of their portfolio New York, NY 347,000347.0k $1.2m $1.2m 0.03% New
37 Swiss National Bank 0.00% of their portfolio ZURICH, V8 325,900325.9k $1.2m $1.2m 0.00% New
38 AXON CAPITAL LP 2.12% of their portfolio New York, NY 305,802305.8k $1.1m $1.1m 2.12% New
39 Boussard & Gavaudan Investment Management LLP 0.10% of their portfolio London, X0 295,264295.3k $1.0m $1.0m 0.10% New
40 Jefferies Financial Group Inc. 0.01% of their portfolio NEW YORK, NY 275,900275.9k $976.7k $976.7k 0.01% New
41 Brummer Multi-Strategy AB 4.06% of their portfolio STOCKHOLM, V7 275,409275.4k $974.9k $974.9k 4.06% New
42 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio NEW YORK, NY 266,000266.0k $941.6k $941.6k 0.00% New
43 Jain Global LLC 0.01% of their portfolio NEW YORK, NY 244,187244.2k $864.4k $864.4k 0.01% New
44 Brevan Howard Capital Management LP 0.01% of their portfolio ST. HELIER, Y9 236,942236.9k $838.8k $838.8k 0.01% New
45 Verdad Advisers, LP 0.91% of their portfolio BOSTON, MA 227,670227.7k $806.0k $806.0k 0.91% New
46 Catalio Capital Management, LP 0.15% of their portfolio NEW YORK, NY 196,858196.9k $696.9k $696.9k 0.15% New
47 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 192,514192.5k $654.5k $654.5k 0.00% New
48 Hudson Bay Capital Management LP 0.00% of their portfolio STAMFORD, CT 188,485188.5k $667.2k $667.2k 0.00% New
49 IQ EQ FUND MANAGEMENT (IRELAND) Ltd 0.05% of their portfolio DUBLIN 2, L2 188,033188.0k $665.6k $665.6k 0.05% New
50 Burkehill Global Management, LP 0.03% of their portfolio NEW YORK, NY 185,000185.0k $654.9k $654.9k 0.03% New
51 BIT Capital GmbH 0.04% of their portfolio BERLIN, 2M 182,576182.6k $646.3k $646.3k 0.04% New
52 Rockefeller Capital Management L.P. 0.00% of their portfolio NEW YORK, NY 179,000179.0k $633.7k $633.7k 0.00% New
53 Nuveen, LLC 0.00% of their portfolio CHARLOTTE, NC 177,123177.1k $627.0k $627.0k 0.00% New
54 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 171,388171.4k $606.7k $606.7k 0.00% New
55 Shay Capital LLC 0.08% of their portfolio NEW YORK, NY 164,142164.1k $581.1k $581.1k 0.08% New
56 Carrera Capital Advisors 0.08% of their portfolio TROY, MI 137,560137.6k $487.0k $487.0k 0.08% New
57 Warm Springs Advisors Inc. 0.41% of their portfolio LARKSPUR, CA 136,400136.4k $482.9k $482.9k 0.41% New
58 Catalyst Funds Management Pty Ltd 0.07% of their portfolio SYDNEY NSW, C3 113,400113.4k $401.4k $401.4k 0.07% New
59 VANGUARD ASSET MANAGEMENT, Ltd 0.00% of their portfolio London, EC4N 8AF, X0 110,492110.5k $391.1k $391.1k 0.00% First filing
60 Legal & General Group Plc 0.00% of their portfolio London, X0 105,636105.6k $374.0k $374.0k 0.00% New
61 STATE OF WISCONSIN INVESTMENT BOARD 0.00% of their portfolio MADISON, WI 103,459103.5k $366.2k $366.2k 0.00% New
62 Vanguard Global Advisers, LLC 0.00% of their portfolio MALVERN, PA 88,42988.4k $313.0k $313.0k 0.00% First filing
63 JANUS HENDERSON GROUP PLC 0.00% of their portfolio LONDON, X0 79,40079.4k $280.7k $280.7k 0.00% New
64 Schonfeld Strategic Advisors LLC 0.00% of their portfolio NEW YORK, NY 77,61177.6k $274.7k $274.7k 0.00% New
65 China Universal Asset Management Co., Ltd. 0.02% of their portfolio SHANGHAI, F4 75,25575.3k $266.4k $266.4k 0.02% New
66 WINTON GROUP Ltd 0.01% of their portfolio LONDON, X0 64,40064.4k $228.0k $228.0k 0.01% New
67 MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio Toronto, A6 64,10064.1k $226.9k $226.9k 0.00% New
68 Virtus Investment Advisers, LLC 0.06% of their portfolio HARTFORD, CT 63,56363.6k $225.0k $225.0k 0.06% New
69 Fore Capital, LLC 0.50% of their portfolio New York, NY 60,00060.0k $212.4k $212.4k 0.50% New
70 Quantinno Capital Management LP 0.00% of their portfolio NEW YORK, NY 58,24658.2k $206.2k $206.2k 0.00% New
71 State of New Jersey Common Pension Fund D 0.00% of their portfolio TRENTON, NJ 56,49356.5k $200.0k $200.0k 0.00% New
72 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 53,19953.2k $188.3k $188.3k 0.00% New
73 Caprock Group, LLC 0.00% of their portfolio BOISE, ID 52,07552.1k $184.3k $184.3k 0.00% New
74 MYDA Advisors LLC 0.04% of their portfolio WOODMERE, NY 50,00050.0k $177.0k $177.0k 0.04% New
75 Trueblood Wealth Management, LLC 0.07% of their portfolio LIMA, OH 50,00050.0k $177.0k $177.0k 0.07% New
76 SEAVIEW INVESTMENT MANAGERS LLC 0.06% of their portfolio MIAMI, FL 49,92249.9k $176.7k $176.7k 0.06% New
77 VectorGlobal IAG, Inc. 0.05% of their portfolio MIAMI, FL 49,92249.9k $176.7k $176.7k 0.05% First filing
78 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 49,05249.1k $173.6k $173.6k 0.00% New
79 Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio ZURICH, V8 46,37546.4k $164.2k $164.2k 0.00% New
80 Jump Financial, LLC 0.00% of their portfolio Chicago, IL 46,02646.0k $162.9k $162.9k 0.00% New
81 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 45,60945.6k $161.5k $161.5k 0.00% New
82 ARIZONA STATE RETIREMENT SYSTEM 0.00% of their portfolio PHOENIX, AZ 45,40445.4k $160.7k $160.7k 0.00% New
83 Vanguard Investments Australia, Ltd. 0.00% of their portfolio Victoria, C3 43,09143.1k $152.5k $152.5k 0.00% First filing
84 Ruane, Cunniff & Goldfarb L.P. 0.00% of their portfolio New York, NY 42,11242.1k $149.1k $149.1k 0.00% New
85 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 38,21838.2k $135.3k $135.3k 0.00% New
86 HighTower Advisors, LLC 0.00% of their portfolio CHICAGO, IL 38,13838.1k $135.0k $135.0k 0.00% New
87 THOROUGHBRED FINANCIAL SERVICES, LLC 0.01% of their portfolio BRENTWOOD, TN 33,82033.8k $119.0k $119.0k 0.01% Reduced -13.4k -13,394
88 Amundi 0.00% of their portfolio Paris, I0 33,12133.1k $117.2k $117.2k 0.00% New
89 Cresset Asset Management, LLC 0.00% of their portfolio Chicago, IL 31,31531.3k $110.9k $110.9k 0.00% New
90 KINGSWOOD WEALTH ADVISORS, LLC 0.01% of their portfolio SAN DIEGO, CA 30,00730.0k $106.2k $106.2k 0.01% New
91 RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio ST. PETERSBURG, FL 29,99030.0k $106.2k $106.2k 0.00% New
92 DRW Securities, LLC 0.01% of their portfolio CHICAGO, IL 29,04529.0k $102.8k $102.8k 0.01% New
93 Robertson Stephens Wealth Management, LLC 0.00% of their portfolio San Francisco, CA 28,29728.3k $100.2k $100.2k 0.00% New
94 North Star Investment Management Corp. 0.01% of their portfolio CHICAGO, IL 28,27528.3k $100.1k $100.1k 0.01% Added +12.6k +12,600
95 D. E. Shaw & Co., Inc. 0.00% of their portfolio New York, NY 27,41927.4k $97.1k $97.1k 0.00% New
96 Creative Planning 0.00% of their portfolio OVERLAND PARK, KS 27,19127.2k $96.3k $96.3k 0.00% New
97 EVOKE WEALTH, LLC 0.00% of their portfolio Los Angeles, CA 26,51126.5k $93.8k $93.8k 0.00% New
98 Quantessence Capital LLC 0.44% of their portfolio NEW YORK, NY 25,31125.3k $89.6k $89.6k 0.44% New
99 Bright Futures Wealth Management, LLC. 0.06% of their portfolio WEBSTER, NY 14580, NY 25,00025.0k $88.5k $88.5k 0.06% New
100 Wedmont Private Capital 0.00% of their portfolio WEST CHESTER, PA 25,00025.0k $94.0k $94.0k 0.00% New