Who owns Definium Therapeutics, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of DFTX from SEC Form 13F filings across 360 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 360 institutions disclosed 114.7M shares of Definium Therapeutics, Inc. worth $5.34B — about 103.6% of shares outstanding; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
360
13F holders
$5.34B
value, 2026 filers
103.6%
of shares outstanding (114.7M sh)
151
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of DFTX's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 11.2M | $528.4M | 0.0% | 10.1% | +32.5% |
| 2 | Avoro Capital Advisors LLC | 7.2M | $338.2M | 3.0% | 6.5% | +43.8% |
| 3 | Driehaus Capital Management LLC | 6.8M | $322.0M | 1.9% | 6.2% | +15.8% |
| 4 | Jupiter Topco LLCNEW | 5.6M | $264.0M | 0.1% | 5.1% | new |
| 5 | Capital World InvestorsNEW | 5.4M | $252.5M | 0.0% | 4.8% | new |
| 6 | FMR LLC | 4.8M | $223.6M | 0.0% | 4.3% | +162.6% |
| 7 | PRICE T ROWE ASSOCIATES INC /MD/ | 4.7M | $218.8M | 0.0% | 4.2% | +6545.7% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 3.6M | $171.5M | 0.0% | 3.3% | +46.1% |
| 9 | STATE STREET CORP | 3.1M | $144.2M | 0.0% | 2.8% | +24.0% |
| 10 | Capital International InvestorsNEW | 3.0M | $139.4M | 0.0% | 2.7% | new |
| 11 | Octagon Capital Advisors LP | 3.0M | $138.8M | 12.5% | 2.7% | +20.9% |
| 12 | WELLINGTON MANAGEMENT GROUP LLP | 2.9M | $138.8M | 0.0% | 2.7% | +126.1% |
| 13 | Deep Track Capital, LP | 2.8M | $129.4M | 1.9% | 2.5% | -8.3% |
| 14 | Commodore Capital LP | 2.0M | $94.1M | 5.6% | 1.8% | 0.0% |
| 15 | ALLIANCEBERNSTEIN L.P. | 1.8M | $34.1M | 0.0% | 1.6% | +1866.4% |
| 16 | GOLDMAN SACHS GROUP INC | 1.8M | $84.7M | 0.0% | 1.6% | +7.5% |
| 17 | CITADEL ADVISORS LLC | 1.7M | $79.4M | 0.0% | 1.5% | +26.6% |
| 18 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.6M | $77.5M | 0.0% | 1.5% | +88.9% |
| 19 | RA CAPITAL MANAGEMENT, L.P.NEW | 1.5M | $70.6M | 0.6% | 1.4% | new |
| 20 | VANGUARD CAPITAL MANAGEMENT LLC | 1.5M | $69.9M | 0.0% | 1.3% | +35.5% |
| 21 | Siren, L.L.C. | 1.4M | $66.8M | 1.4% | 1.3% | +54.4% |
| 22 | MARSHALL WACE, LLP | 1.3M | $61.1M | 0.0% | 1.2% | +8.2% |
| 23 | NORTHERN TRUST CORP | 1.2M | $55.0M | 0.0% | 1.1% | +46.3% |
| 24 | AMERIPRISE FINANCIAL INC | 1.1M | $54.0M | 0.0% | 1% | +18.8% |
| 25 | Nuveen, LLC | 1.1M | $52.0M | 0.0% | 1% | +58.3% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.