AtaiBeckley ATAI Institutional Ownership

NASDAQ ATAI

$7.39 +0.05 (+0.68%)

As of: Sep 4, 2026 · 3:59 PM EDT

Institutions by Trading Activity

242 Institutions

Increased 171 70.7%

Unchanged 46 19.0%

Reduced 25 10.3%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

37.95%

▲+9.90 pp QoQ

Shares Held by Institutions

136.90Mn

of 360.75Mn outstanding

▲+46.24% QoQ

Shares Outstanding

360.75Mn

223.86Mn held outside 13F filers

Institutional Investors

242

filed 13F for Jun 2026

▲+57 vs prior quarter

Net Shares Added (QoQ)

+43.28Mn

accumulated since last quarter

Value of Holdings

$1.00Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

AtaiBeckley Inc. (NASDAQ:ATAI) appears in 242 institutional 13F filings for the quarter ending June 2026.

Collectively, these holders controlled 37.9% of AtaiBeckley's outstanding shares in June 2026, up from 28.0% in March 2026.
Their total shares held in ATAI increased 46.24% quarter over quarter, and separately, investors owning AtaiBeckley increased 160.22% from a year ago.
Of these 242 holders, 171 added to their stakes in AtaiBeckley, 25 trimmed positions, and 46 made no changes.
In total, institutional investors held 136.9Mn shares in AtaiBeckley as of June 2026, up by 43.28Mn shares quarter on quarter, and up 111.49Mn shares year over year.
As of June 30, 2026, the biggest holder of AtaiBeckley is BlackRock, Inc. at 25.57Mn shares, representing 7.09% of shares outstanding.
The largest buyers of AtaiBeckley for the quarter ending June 2026 were BlackRock, Inc. (18.74Mn), State Street Corp (7.14Mn), GEODE CAPITAL MANAGEMENT, LLC (4.42Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (4.11Mn), Deep Track Capital, LP (2.42Mn).
The biggest sellers of AtaiBeckley for the quarter ending June 2026 included SUSQUEHANNA INTERNATIONAL GROUP, LLP (4.8Mn), UBS Group AG (3.0Mn), MILLENNIUM MANAGEMENT LLC (2.59Mn), MARSHALL WACE, LLP (2.25Mn), TWO SIGMA INVESTMENTS, LP (1.15Mn).
AtaiBeckley's 10 largest shareholders as of June 2026 include BlackRock, Inc. (25.57Mn), Deep Track Capital, LP (14.42Mn), VANGUARD CAPITAL MANAGEMENT LLC (11.75Mn), State Street Corp (8.29Mn), GEODE CAPITAL MANAGEMENT, LLC (6.93Mn), ADAGE CAPITAL PARTNERS GP, L.L.C. (5.64Mn), UBS Group AG (4.42Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (4.11Mn), Morgan Stanley (3.84Mn), Candriam S.C.A. (3.04Mn) per Business Quant data.

Form 13F Holdings

242 Institutional Holders

Report period 30 Jun, 2026

Total shares held 136.90Mn

Of outstanding 37.95%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	25,574,573	7.09%	▲18,739,273	+274.15%	$134.78Mn
2	Deep Track Capital, LP	0001856083	14,417,442	4.00%	▲2,417,442	+20.15%	$75.98Mn
3	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	11,747,249	3.26%	▼14,149	-0.12%	$61.91Mn
4	State Street Corp	0000093751	8,287,054	2.30%	▲7,142,699	+624.17%	$43.67Mn
5	GEODE CAPITAL MANAGEMENT, LLC	0001214717	6,933,309	1.92%	▲4,423,335	+176.23%	$36.54Mn
6	ADAGE CAPITAL PARTNERS GP, L.L.C.	0001165408	5,642,758	1.56%	0	0.00%	$29.74Mn
7	UBS Group AG	0001610520	4,424,701	1.23%	▼3,002,166	-40.42%	$23.32Mn
8	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	4,106,450	1.14%	▲4,106,450	0.00%	$21.64Mn
9	Morgan Stanley	0000895421	3,843,253	1.07%	▼9,519	-0.25%	$20.25Mn
10	Candriam S.C.A.	0001537014	3,039,399	0.84%	▼46,980	-1.52%	$16.00Mn
11	Foresite Capital Management VI LLC	0002013341	2,750,000	0.76%	0	0.00%	$14.49Mn
12	Northern Trust Corp	0000073124	2,589,167	0.72%	▲2,051,117	+381.21%	$13.64Mn
13	CITADEL ADVISORS LLC	0001423053	2,114,908	0.59%	▲1,943,520	+1,133.99%	$11.15Mn
14	RTW INVESTMENTS, LP	0001493215	2,000,000	0.55%	0	0.00%	$10.54Mn
15	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0000884546	1,965,683	0.54%	▲784,100	+66.36%	$10.36Mn
15	Sixth Street Partners Management Company, L.P.	0001812095	1,965,683	0.54%	▲1,965,683	0.00%	$10.36Mn
16	MILLENNIUM MANAGEMENT LLC	0001273087	1,770,526	0.49%	▼2,593,570	-59.43%	$9.33Mn
17	Eagle Health Investments LP	0001842545	1,709,359	0.47%	0	0.00%	$9.01Mn
18	VANGUARD FIDUCIARY TRUST CO	0000933478	1,576,296	0.44%	▲319,565	+25.43%	$8.31Mn
19	Halter Ferguson Financial Inc.	0001842665	1,485,590	0.41%	▲1,485,590	0.00%	$7.83Mn

Showing 1 to 20 of 242 holders