How many institutions held ATAI - AtaiBeckley Inc. - Common stock, par value $0.01 per share in Q1 2026?

175 institutional investors reported ATAI - AtaiBeckley Inc. - Common stock, par value $0.01 per share for Q1 2026. Use the holders table for investor-level position and value details.

AtaiBeckley Inc. - Common stock, par value $0.01 per share (ATAI)

Q: What does CUSIP 04650F101 represent in this 13F holders report?

CUSIP 04650F101 is the security identifier for ATAI - AtaiBeckley Inc. - Common stock, par value $0.01 per share used to aggregate holder disclosures.

CUSIP: 04650F101

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class: Equity / Common stock, par value $0.01 per share
Total 13F shares: 99,158,600
Total 13F value: $350,989,719
Share change: +78,693,277
Put/Call ratio: 24%
SEC-reported price per share: $3.54
Number of holders: 175
Value change: +$276,409,077
Number of buys: 160
Number of sells: 8
Shares outstanding: 368,909,961

Security key

04650F101

Report period

Q1 2026

Institutions

175

Top holders

ATAI full security history Ownership snapshot Full 13F holder table Newer quarter: Q2 2026 Previous quarter: Q4 2025 AtaiBeckley Inc. SEC filings AtaiBeckley Inc. company facts AtaiBeckley Inc. 13D/G history

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 04650F101

Newer quarter: Q2 2026 Previous quarter: Q4 2025

Recent filing periods:

Q2 2026 Q4 2025

Ownership snapshot

Top reported holders of ATAI - AtaiBeckley Inc. - Common stock, par value $0.01 per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

ADAGE CAPITAL PARTNERS GP...

Disclosed value leader

ADAGE CAPITAL PARTNERS GP...

Comparable rows

15/15

Latest evidence

31 Dec 2025

13F Lead comparable stake: 1.9% Showing 1-6 of 15 holder rows.

Quick read

ADAGE CAPITAL PARTNERS GP, L.L.C. leads the comparable SEC ownership view at 1.9%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens ADAGE CAPITAL PARTNERS GP, L.L.C.'s linked filing trail.

Comparable ownership Top 5

ADAGE CAPITAL PARTNERS GP, L.L.C. 1.9%

MORGAN STANLEY 1.3%

Deep Track Capital, LP 1.3%

ARK Investment Management LLC 0.9%

BlackRock, Inc. 0.77%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
ADAGE CAPITAL PARTNERS GP, L.L.C.	13F Company 13F	1.9%	$28,956,570 7,079,846 shares	—	31 Dec 2025
MORGAN STANLEY	13F Company 13F	1.3%	$19,717,783 4,820,973 shares	—	31 Dec 2025
Deep Track Capital, LP	13F Company 13F	1.3%	$19,130,112 4,677,289 shares	—	31 Dec 2025
ARK Investment Management LLC	13F Company 13F	0.9%	$13,521,529 3,305,997 shares	—	31 Dec 2025
BlackRock, Inc.	13F Company 13F	0.77%	$11,506,021 2,813,208 shares	—	31 Dec 2025
Foresite Capital Management VI LLC	13F Company 13F	0.75%	$11,247,500 2,750,000 shares	—	31 Dec 2025

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

175

99,158,600

Rows available

175

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2026 vs Q4 2025 Across Filers

Q4 2025 holders

Q1 2026 holders

175

Holder diff

155

Investor	Q4 2025 Shares	Q1 2026 Shares	Share Diff	Share Chg %	Q4 2025 value	Q1 2026 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend