Atai Life Sciences Ownership | Who Owns Atai Life Sciences?

Atai Life Sciences Ownership Summary

Atai Life Sciences is owned by 16.54% institutional investors, 7.70% insiders, and 75.76% retail investors. Adage capital partners gp is the largest institutional shareholder, holding 3.08% of ATAI shares. ARK Genomic Revolution ETF is the top mutual fund, with 0.73% of its assets in Atai Life Sciences shares.

ATAI Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Atai Life Sciences	16.54%	7.70%	75.76%
Sector	Healthcare Stocks	487.91%	11.08%	-398.99%
Industry	Biotech Stocks	307.10%	11.11%	-218.21%
Idea	Psychedelic Stocks List	41.93%	14.87%	43.21%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Adage capital partners gp	5.43M	3.08%	$11.90M
Morgan stanley	2.72M	1.71%	$3.62M
Pale fire capital se	2.64M	1.50%	$5.78M
Ubs group	1.94M	1.21%	$2.58M
Blackrock	1.31M	0.82%	$1.74M
Millennium management	981.56K	0.61%	$1.31M
Moore capital management, lp	952.38K	0.54%	$2.09M
Brown university	718.50K	0.41%	$1.57M
Woodline partners lp	562.37K	0.35%	$747.96K
Vanguard group	400.56K	0.25%	$532.75K

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Brown university	718.50K	1.11%	$1.57M
Pale fire capital se	2.64M	0.59%	$5.78M
Hyperion capital advisors lp	168.42K	0.23%	$368.83K
Advisorshares investments	389.76K	0.15%	$853.58K
Diametric capital, lp	53.02K	0.06%	$116.12K
Ptm wealth management	15.00K	0.05%	$82.05K
Evolution wealth management	6.47K	0.04%	$34.21K
Bright futures wealth management, llc.	25.00K	0.03%	$37.50K
Moore capital management, lp	952.38K	0.03%	$2.09M
Audent global asset management	16.84K	0.02%	$22.39K

Top Buyers

Holder	Shares	% Assets	Change
Adage capital partners gp	5.43M	0.02%	5.43M
Ubs group	1.94M	0.00%	1.91M
Millennium management	981.56K	0.00%	539.83K
Susquehanna group, llp	307.32K	0.00%	293.99K
Marshall wace, llp	279.87K	0.00%	279.87K

Top Sellers

Holder	Shares	% Assets	Change
Walleye capital	-	-	-2.26M
Davidson kempner capital management lp	-	-	-1.41M
Citadel advisors	3.08K	-	-304.74K
Blackrock funding, inc. /de	4.40K	-	-304.64K
Tejara capital	-	-	-260.21K

New Positions

Holder	Shares	% Assets	Change	Value
Adage capital partners gp	5.43M	0.02%	5.43M	$11.90M
Marshall wace, llp	279.87K	0.00%	279.87K	$612.92K
Sumitomo mitsui trust	202.78K	0.00%	202.78K	$1.07M
Bnp paribas arbitrage, snc	43.86K	-	43.86K	$58.34K
Quadrature capital	32.22K	0.00%	32.22K	$70.41K

Sold Out

Holder	Change
Nelson, van denburg & campbell wealth management group	-57.00
Glen eagle advisors	-166.00
Redwood wealth management group	-200.00
Legend financial advisors	-233.00
Venturi wealth management	-300.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2025	97	14.12%	29,160,750	33.18%	16	10.72%	41	46.43%	23	9.52%
Mar 31, 2025	85	-6.59%	21,905,949	50.78%	12	15.19%	28	-33.33%	21	61.54%
Dec 31, 2024	88	14.29%	14,501,746	24.52%	9	17.17%	41	78.26%	13	-38.10%
Sep 30, 2024	76	-15.56%	11,574,906	-3.38%	7	12.68%	22	-29.03%	21	40.00%
Jun 30, 2024	90	-	11,979,202	-3.00%	7	12.47%	31	6.90%	15	-25.00%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
ARK Genomic Revolution ETF	1.57M	0.73%	-5.59K
Candriam Eqs L Biotech C USD Cap	1.17M	0.55%	1.17M
iShares Biotechnology ETF	771.79K	0.46%	-
Kieger Impact Healthcare A USD Acc	644.10K	0.38%	205.80K
Horizons Psychedelic Stock ETF	520.20K	0.31%	-82.78K
Morgan Stanley Inst Inception I	511.99K	0.24%	-
Morgan Stanley Inception	511.99K	0.24%	-
AdvisorShares Psychedelics ETF	450.35K	0.21%	-
Vanguard Health Care ETF	432.04K	0.20%	-4.90K
EQ/Morgan Stanley Small Cap Growth K	316.73K	0.15%	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
Aug 14, 2025	Apeiron Investment Group Ltd.	-	Buy	$19.00M
Mar 21, 2025	Kirpekar Sahil	Chief Business Officer	Sell	$65.56K
Mar 21, 2025	Craig Kevin James	Chief Medical Officer	Sell	$15.61K
Mar 21, 2025	Rao Srinivas	See Remarks	Sell	$101.81K
Mar 21, 2025	Johnson Anne Nagengast	Chief Financial Officer	Sell	$45.29K

Insider Transactions Trends

Date	Buy	Sell
2025 Q4	-	-
2025 Q3	1	-
2025 Q2	-	-
2025 Q1	2	5
2024 Q4	-	-

ATAI Ownership FAQ

Who Owns Atai Life Sciences?

Atai Life Sciences shareholders are primarily institutional investors at 16.54%, followed by 7.70% insiders and 75.76% retail investors. The average institutional ownership in Atai Life Sciences's industry, Biotech Stocks , is 307.10%, which Atai Life Sciences falls below.

Who owns the most shares of Atai Life Sciences?

Atai Life Sciences’s largest shareholders are Adage capital partners gp (5.43M shares, 3.08%), Morgan stanley (2.72M shares, 1.71%), and Pale fire capital se (2.64M shares, 1.50%). Together, they hold 6.29% of Atai Life Sciences’s total shares outstanding.

Does Blackrock own Atai Life Sciences?

Yes, BlackRock owns 0.82% of Atai Life Sciences, totaling 1.31M shares as of Jun 2024. This represents 0% of BlackRock's total assets, with a market value of 1.74M$. In the last quarter, BlackRock decreased its holdings by -94.533K shares, a -6.75% change.

Who is Atai Life Sciences’s biggest shareholder by percentage of total assets invested?

Brown university is Atai Life Sciences’s biggest shareholder by percentage of total assets invested, with 1.11% of its assets in 718.5K Atai Life Sciences shares, valued at 1.57M$.

Who is the top mutual fund holder of Atai Life Sciences shares?

ARK Genomic Revolution ETF is the top mutual fund holder of Atai Life Sciences shares, with 0.73% of its total shares outstanding invested in 1.57M Atai Life Sciences shares.

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