Who owns Definium Therapeutics, Inc.?
Institutional ownership of DFTX from SEC Form 13F filings across 247 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.
247
13F holders
$3.46B
value, 2026 filers
59.8%
of shares outstanding (79.4M sh)
94
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% | 8.5% | +32.5% |
| 2 | Jupiter Topco LLCNEW | 5.6M | $264.0M | 0.1% | 4.2% | new |
| 3 | Capital World InvestorsNEW | 5.4M | $252.5M | 0.0% | 4% | new |
| 4 | FMR LLC | 4.8M | $223.6M | 0.0% | 3.6% | +162.6% |
| 5 | PRICE T ROWE ASSOCIATES INC /MD/ | 4.7M | $218,833 | 0.0% | 3.5% | +6545.7% |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | 3.6M | $171.5M | 0.0% | 2.7% | +46.1% |
| 7 | Capital International InvestorsNEW | 3.0M | $139.4M | 0.0% | 2.2% | new |
| 8 | WELLINGTON MANAGEMENT GROUP LLP | 2.9M | $138.8M | 0.0% | 2.2% | +126.1% |
| 9 | Deep Track Capital, LP | 2.8M | $129.4M | 1.9% | 2.1% | -8.3% |
| 10 | ALLIANCEBERNSTEIN L.P. | 1.8M | $34.1M | 0.0% | 1.4% | +1866.4% |
| 11 | GOLDMAN SACHS GROUP INC | 1.8M | $84.7M | 0.0% | 1.4% | +7.5% |
| 12 | CITADEL ADVISORS LLC | 1.7M | $79.4M | 0.0% | 1.3% | +26.6% |
| 13 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.6M | $77.5M | 0.0% | 1.2% | +88.9% |
| 14 | VANGUARD CAPITAL MANAGEMENT LLC | 1.5M | $69.9M | 0.0% | 1.1% | -32.2% |
| 15 | MARSHALL WACE, LLP | 1.3M | $61.1M | 0.0% | 1% | +8.2% |
| 16 | NORTHERN TRUST CORP | 1.2M | $55.0M | 0.0% | 0.9% | +46.3% |
| 17 | AMERIPRISE FINANCIAL INC | 1.1M | $54.0M | 0.0% | 0.9% | +18.8% |
| 18 | Nuveen, LLC | 1.1M | $52.0M | 0.0% | 0.8% | +58.3% |
| 19 | Sixth Street Partners Management Company, L.P.NEW | 1.1M | $51.0M | 8.8% | 0.8% | new |
| 20 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.1M | $51.0M | 0.0% | 0.8% | +34.0% |
| 21 | Woodline Partners LP | 1.0M | $47.2M | 0.1% | 0.8% | -33.3% |
| 22 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 1.0M | $47.0M | 0.1% | 0.8% | -13.0% |
| 23 | TWO SIGMA INVESTMENTS, LP | 921,818 | $43.4M | 0.0% | 0.7% | -23.3% |
| 24 | Balyasny Asset Management L.P. | 897,658 | $42.2M | 0.1% | 0.7% | -29.6% |
| 25 | VANGUARD FIDUCIARY TRUST CO | 827,693 | $38.9M | 0.0% | 0.6% | +43.7% |
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.