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	212.97%	10.98%	-123.95%
Industry	Biotech Stocks	290.86%	10.94%	-201.80%
Idea	Psychedelic Stocks List	41.36%	15.18%	43.47%

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
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
Seaview investment managers	49.92K	0.02%	$109.33K
Adage capital partners gp	5.43M	0.02%	$11.90M

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
Kingswood wealth advisors	50.00K	0.01%	50.00K	$66.50K
Sg americas securities	48.94K	0.00%	48.94K	$65.00K
Bnp paribas arbitrage, snc	43.86K	-	43.86K	$58.34K

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	1.55M	0.73%	-9.32K
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	0.26%	-
Morgan Stanley Inception	511.99K	0.26%	-
Vanguard Health Care ETF	436.93K	0.21%	-153.00
AdvisorShares Psychedelics ETF	418.35K	0.20%	-
EQ/Morgan Stanley Small Cap Growth K	316.73K	0.15%	-
Kairos Intl SICAV Opports L/S P	212.70K	0.13%	212.70K

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 Q3	-	-
2025 Q2	-	-
2025 Q1	2	5
2024 Q4	-	-
2024 Q2	-	4

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 290.86%, 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 1.55M Atai Life Sciences shares.

Try Tickergate Pro Free

Customize Everything. 100% Flexibility. Fast and Easy to Use (No code or Excel Needed)

Customize your own personal stocks lists, views and charts
Choose from hundreds of fields, up to 15 years of history
Conduct deep comparison analysis

Discover trending investment themes
Find your next best investment
Research stocks using tools