ATAI Institutional Ownership & Shareholders
ATAI LIFE SCIENCES NV (ATAI) is currently held by 171 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $666.51M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of ATAI tracked by InsiderSet, reporting ownership valued at approximately $134.78M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $187.97M, representing an estimated gain of +39.47% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 70% of the total disclosed ATAI value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Deep Track Capital, Lp, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in ATAI LIFE SCIENCES NV (ATAI).
This page ranks the largest institutional ATAI shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
171
Total Reported Value
$666.51M
Largest Holder
Blackrock, Inc.
Largest Position
$134.78M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
128
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 25,574,573 | $134,777,999 | $187,973,112 | +$53,195,113 | +39.47% | |
| Deep Track Capital, Lp | 1.12% | 14,417,442 | $75,979,919 | $105,968,199 | +$29,988,280 | +39.47% | |
| Vanguard Capital Management Llc | 0.00% | 11,747,249 | $61,908,002 | $86,342,280 | +$24,434,278 | +39.47% | |
| State Street Corp | 0.00% | 8,287,054 | $43,672,775 | $60,909,847 | +$17,237,072 | +39.47% | |
| Geode Capital Management, Llc | 0.00% | 6,933,309 | $36,543,357 | $50,959,821 | +$14,416,464 | +39.45% | |
| Adage Capital Partners Gp, L.L.C. | 0.04% | 5,642,758 | $29,737,335 | $41,474,271 | +$11,736,936 | +39.47% | |
| Ubs Group Ag | 0.00% | 4,424,701 | $23,318,174 | $32,521,552 | +$9,203,378 | +39.47% | |
| Vanguard Portfolio Management Llc | 0.00% | 4,106,450 | $21,640,992 | $30,182,408 | +$8,541,416 | +39.47% | |
| Morgan Stanley | 0.00% | 3,843,253 | $20,253,943 | $28,247,910 | +$7,993,967 | +39.47% | |
| Candriam S.C.A. | 0.07% | 3,039,399 | $16,002,222 | $22,339,583 | +$6,337,361 | +39.60% | |
| Foresite Capital Management Vi Llc | 2.26% | 2,750,000 | $14,492,500 | $20,212,500 | +$5,720,000 | +39.47% | |
| Northern Trust Corp | 0.00% | 2,589,167 | $13,644,910 | $19,030,377 | +$5,385,467 | +39.47% | |
| Citadel Advisors Llc | 0.01% | 2,114,908 | $11,145,565 | $15,544,574 | +$4,399,009 | +39.47% | |
| Rtw Investments, Lp | 0.09% | 2,000,000 | $10,540,000 | $14,700,000 | +$4,160,000 | +39.47% | |
| Charles Schwab Investment Management Inc | 0.00% | 1,965,683 | $10,359,149 | $14,447,770 | +$4,088,621 | +39.47% | |
| Millennium Management Llc | 0.01% | 1,770,526 | $9,330,672 | $13,013,366 | +$3,682,694 | +39.47% | |
| Eagle Health Investments Lp | 1.49% | 1,709,359 | $9,008,322 | $12,563,789 | +$3,555,467 | +39.47% | |
| Vanguard Fiduciary Trust Co | 0.00% | 1,576,296 | $8,307,080 | $11,585,776 | +$3,278,696 | +39.47% | |
| First Trust Advisors Lp | 0.00% | 1,375,500 | $7,248,885 | $10,109,925 | +$2,861,040 | +39.47% | |
| Price T Rowe Associates Inc | 0.00% | 1,350,732 | $7,119,000 | $9,927,880 | +$2,808,880 | +39.46% | |
| Nuveen, Llc | 0.00% | 1,295,262 | $6,826,030 | $9,520,176 | +$2,694,146 | +39.47% | |
| Newtyn Management, Llc | 0.78% | 1,187,808 | $6,259,748 | $8,730,389 | +$2,470,641 | +39.47% | |
| Moore Capital Management, Lp | 0.11% | 952,380 | $5,019,043 | $6,999,993 | +$1,980,950 | +39.47% | |
| Goldman Sachs Group Inc | 0.00% | 946,100 | $4,985,946 | $6,953,835 | +$1,967,889 | +39.47% | |
| Adar1 Capital Management, Llc | 0.23% | 913,242 | $4,812,785 | $6,712,329 | +$1,899,544 | +39.47% | |
| Bank Of New York Mellon Corp | 0.00% | 891,983 | $4,700,748 | $6,556,075 | +$1,855,327 | +39.47% | |
| Advisorshares Investments Llc | 0.56% | 882,892 | $4,652,841 | $6,489,256 | +$1,836,415 | +39.47% | |
| Two Sigma Investments, Lp | 0.00% | 822,471 | $4,334,422 | $6,045,162 | +$1,710,740 | +39.47% | |
| Orbimed Advisors Llc | 0.08% | 797,500 | $4,202,825 | $5,861,625 | +$1,658,800 | +39.47% | |
| Brown University | 3.97% | 718,500 | $3,786,495 | $5,280,975 | +$1,494,480 | +39.47% | |
| Woodline Partners Lp | 0.01% | 600,000 | $3,162,000 | $4,410,000 | +$1,248,000 | +39.47% | |
| Bank Of America Corp | 0.00% | 490,433 | $2,584,582 | $3,604,683 | +$1,020,101 | +39.47% | |
| Susquehanna International Group, Llp | 0.00% | 487,486 | $2,569,051 | $3,583,022 | +$1,013,971 | +39.47% | |
| Amova Asset Management Americas, Inc. | 0.03% | 483,952 | $2,545,588 | $3,557,047 | +$1,011,459 | +39.73% | |
| Swiss National Bank | 0.00% | 473,700 | $2,496,399 | $3,481,695 | +$985,296 | +39.47% | |
| Rhumbline Advisers | 0.00% | 399,436 | $2,105,019 | $2,935,855 | +$830,836 | +39.47% | |
| Man Group Plc | 0.00% | 358,812 | $1,890,939 | $2,637,268 | +$746,329 | +39.47% | |
| Deutsche Bank Ag\ | 0.00% | 345,042 | $1,818,372 | $2,536,059 | +$717,687 | +39.47% | |
| Bit Capital Gmbh | 0.06% | 320,576 | $1,689,436 | $2,356,234 | +$666,798 | +39.47% | |
| Voya Investment Management Llc | 0.00% | 304,576 | $1,605,116 | $2,238,634 | +$633,518 | +39.47% | |
| Wells Fargo & Company/Mn | 0.00% | 297,918 | $1,570,028 | $2,189,697 | +$619,669 | +39.47% | |
| Jpmorgan Chase & Co | 0.00% | 273,350 | $1,541,246 | $2,009,123 | +$467,877 | +30.36% | |
| Op Asset Management Ltd | 0.02% | 423,674 | $1,499,806 | $3,114,004 | +$1,614,198 | +107.63% | |
| Jefferies Financial Group Inc. | 0.01% | 275,900 | $1,453,993 | $2,027,865 | +$573,872 | +39.47% | |
| California State Teachers Retirement System | 0.00% | 264,382 | $1,393,293 | $1,943,208 | +$549,915 | +39.47% | |
| Iq Eq Fund Management (Ireland) Ltd | 0.08% | 252,913 | $1,332,852 | $1,858,911 | +$526,059 | +39.47% | |
| Invesco Ltd. | 0.00% | 248,757 | $1,310,949 | $1,828,364 | +$517,415 | +39.47% | |
| Ameriprise Financial Inc | 0.00% | 241,024 | $1,270,196 | $1,771,526 | +$501,330 | +39.47% | |
| Citigroup Inc | 0.00% | 239,550 | $1,262,428 | $1,760,693 | +$498,265 | +39.47% | |
| Alliancebernstein L.P. | 0.00% | 355,500 | $1,258,470 | $2,612,925 | +$1,354,455 | +107.63% |
Frequently asked questions about ATAI
Who are the largest institutional holders of ATAI?
The largest institutional holders of ATAI reported in the latest SEC Form 13F filings include Blackrock, Inc., Deep Track Capital, Lp, Vanguard Capital Management Llc, State Street Corp, and Geode Capital Management, Llc. InsiderSet ranks institutional holders by their latest reported ATAI position.
What is ATAI institutional ownership?
This page tracks ATAI positions reported by institutional investment managers through SEC Form 13F. ATAI LIFE SCIENCES NV (ATAI) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ATAI?
InsiderSet currently tracks 171 institutional managers reporting ATAI holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ATAI shareholders.
How much ATAI stock do institutions own?
Institutional investment managers disclosed approximately $666.51M in ATAI holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ATAI institutional ownership last updated?
The latest ATAI institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ATAI holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ATAI position after the reporting date.
Are institutions buying or selling ATAI?
Institutional buying and selling can be analyzed by comparing ATAI positions across consecutive 13F reporting periods. InsiderSet's ATAI Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ATAI ownership changes.
How has ATAI institutional ownership changed over time?
InsiderSet tracks ATAI institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.