Definium Therapeutics, Inc. (DFTX) Insider Trading
Over the last 3 months, DFTX insiders made 0 open-market buys and 5 sales, a net sale of -$2.6M (SEC Form 4). Over the last 6 months, 124 institutions increased and 66 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
5
Net (3m)
-$2.6M
Insider trades by month Buys Sells
Mar
Jun
Context3-month price +71%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 12, 2026 | Barrow Robertdirector, officer: Chief Executive Officer | Grant | 375,000 | — |
| Aug 12, 2026 | Roberts Brandiofficer: Chief Financial Officer | Grant | 62,500 | — |
| Aug 12, 2026 | Wiley Matthew T.officer: Chief Commercial Officer | Grant | 62,500 | — |
| Aug 12, 2026 | Sullivan Markofficer: Chief Legal Officer | Grant | 62,500 | — |
| Aug 12, 2026 | Karlin Danielofficer: Chief Medical Officer | Grant | 100,000 | — |
| Jun 26, 2026 | Roberts Brandiofficer: Chief Financial Officer | Sell | 3,013 | $45.03 |
| Jun 26, 2026 | Wiley Matthew T.officer: Chief Commercial Officer | Sell | 2,867 | $45.03 |
| Jun 26, 2026 | Karlin Danielofficer: Chief Medical Officer | Sell | 10,035 | $45.03 |
| Jun 26, 2026 | Barrow Robertdirector, officer: Chief Executive Officer | Sell | 29,208 | $45.03 |
| Jun 26, 2026 | Sullivan Markofficer: Chief Legal Officer | Sell | 13,008 | $45.03 |
| Jun 22, 2026 | Wiley Matthew T.officer: Chief Commercial Officer | Grant | 62,500 | — |
| Jun 22, 2026 | Barrow Robertdirector, officer: Chief Executive Officer | Grant | 375,000 | — |
| Jun 22, 2026 | Roberts Brandiofficer: Chief Financial Officer | Grant | 62,500 | — |
| Jun 22, 2026 | Sullivan Markofficer: Chief Legal Officer | Grant | 62,500 | — |
| Jun 22, 2026 | Karlin Danielofficer: Chief Medical Officer | Grant | 100,000 | — |
| Jun 15, 2026 | Bruhn Suzanne Louisedirector | Grant | 19,188 | $24.11 |
| Jun 15, 2026 | CRYSTAL ROGERdirector | Grant | 19,188 | $24.11 |
| Jun 15, 2026 | CRYSTAL ROGERdirector | Grant | 4,666 | — |
| Jun 15, 2026 | Adsett Rogerdirector | Grant | 3,555 | — |
| Jun 15, 2026 | Adsett Rogerdirector | Grant | 14,620 | $24.11 |
| Jun 15, 2026 | Bruhn Suzanne Louisedirector | Grant | 4,666 | — |
| Jun 15, 2026 | Krebs Andreasdirector | Grant | 19,188 | $24.11 |
| Jun 15, 2026 | Krebs Andreasdirector | Grant | 4,666 | — |
| Jun 15, 2026 | Vallone Carol Adirector | Grant | 19,188 | $24.11 |
| Jun 15, 2026 | Vallone Carol Adirector | Grant | 4,666 | — |
| Jun 15, 2026 | GRYSKA DAVID Wdirector | Grant | 19,188 | $24.11 |
| Jun 15, 2026 | GRYSKA DAVID Wdirector | Grant | 4,666 | — |
| Mar 26, 2026 | Barrow Robertdirector, officer: Chief Executive Officer | Sell | 24,431 | $18.47 |
| Mar 26, 2026 | Sullivan Markofficer: Chief Legal Officer | Sell | 10,702 | $18.47 |
| Mar 26, 2026 | Karlin Danielofficer: Chief Medical Officer | Sell | 8,018 | $18.47 |
Source: DFTX SEC Form 4 filings, latest Aug 12, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their DFTX positions over the last 6 months (SEC Form 13F).
Increased
124
New positions
396
Reduced
66
Sold out
29
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BlackRock, Inc. | Increased | 11.2M | Aug 7, 2026 |
| BLACKROCK, INC. | New Position | 8.5M | May 13, 2026 |
| Avoro Capital Advisors LLC | Increased | 7.2M | Aug 14, 2026 |
| DRIEHAUS CAPITAL MANAGEMENT LLC | Increased | 6.8M | Aug 14, 2026 |
| DRIEHAUS CAPITAL MANAGEMENT LLC | Reduced | 5.9M | May 15, 2026 |
| Jupiter Topco LLC | New Position | 5.6M | Aug 14, 2026 |
| Capital World Investors | New Position | 5.4M | Aug 12, 2026 |
| AVORO CAPITAL ADVISORS LLC | New Position | 5.0M | May 15, 2026 |
| FMR LLC | Increased | 4.8M | Aug 13, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 4.7M | Aug 14, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 3.6M | Aug 12, 2026 |
| JANUS HENDERSON GROUP PLC | New Position | 3.6M | May 18, 2026 |
| STATE STREET CORP | Increased | 3.1M | Aug 7, 2026 |
| DEEP TRACK CAPITAL, LP | New Position | 3.0M | May 15, 2026 |
| Capital International Investors | New Position | 3.0M | Aug 12, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.