Definium Therapeutics, Inc. insider trading
DFTX$37.40-0.20 (-0.53%)
“Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise.”
Insider Trading vs Stock Price
Insider Trading vs Stock Price data
Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (+206.1%). 0 insider transactions plotted in this window as 0 markers; nearby trades of the same kind are grouped.
| Date | Category | Person | Role | Action | Amount | Change in holding |
|---|
Open market purchase
Open market sellNet dollar flow · Buy / Sell balance
PremiumQ2 '25Q3 '25Q4 '25Q1 '26Q2 '26Q3 '26
Unlock quarterly net flowKey players
- RBRobert Barrow1.647%
- DKDaniel Karlin0.5901%
- MSMark Sullivan0.3678%
- BRBrandi Roberts0.2936%
- MTMatthew T. Wiley0.2672%
- CLCarrie Liao0.1079%
- SLSuzanne Louise Bruhn0.0181%
- RCRoger Crystal0.0181%
- CACarol A. Vallone0.0166%
- AKAndreas Krebs0.0159%
AI Activity Analysis
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Insider activity
Fromto
| Company | Insider / role | Action | ΔOwn | Avg price | Amount | ||
|---|---|---|---|---|---|---|---|
| DFTX | Daniel Karlin | Open market sell$397K | -1.4% | $36.57 | $397K | Sep 25, 2026 | Sep 29, 2026 |
| DFTX | Robert Barrow | Open market sell$1.15M | -1.4% | $36.57 | $1.15M | Sep 25, 2026 | Sep 29, 2026 |
| DFTX | Matthew T. Wiley | Open market sell$113K | -0.9% | $36.57 | $113K | Sep 25, 2026 | Sep 29, 2026 |
| DFTX | Mark Sullivan | Open market sell$514K | -2.8% | $36.57 | $514K | Sep 25, 2026 | Sep 29, 2026 |
| DFTX | Brandi Roberts | Open market sell$123K | -0.9% | $36.57 | $123K | Sep 25, 2026 | Sep 29, 2026 |
| DFTX | Robert Barrow | Open market sell$722K | -1.3% | $37.94 | $722K | Sep 3, 2026 | Sep 4, 2026 |
| DFTX | Mark Sullivan | Open market sell$586K | -3.9% | $45.03 | $586K | Jun 25, 2026 | Jun 26, 2026 |
| DFTX | Daniel Karlin | Open market sell$452K | -2.0% | $45.03 | $452K | Jun 25, 2026 | Jun 26, 2026 |
| DFTX | Brandi Roberts | Open market sell$136K | -1.4% | $45.03 | $136K | Jun 25, 2026 | Jun 26, 2026 |
| DFTX | Robert Barrow | Open market sell$1.32M | -2.6% | $45.03 | $1.32M | Jun 25, 2026 | Jun 26, 2026 |
| DFTX | Matthew T. Wiley | Open market sell$129K | -1.6% | $45.03 | $129K | Jun 25, 2026 | Jun 26, 2026 |
| DFTX | Daniel Karlin | Open market sell$148K | -1.9% | $18.47 | $148K | Mar 25, 2026 | Mar 26, 2026 |
| DFTX | Mark Sullivan | Open market sell$198K | -3.8% | $18.47 | $198K | Mar 25, 2026 | Mar 26, 2026 |
| DFTX | Robert Barrow | Open market sell$451K | -3.1% | $18.47 | $451K | Mar 25, 2026 | Mar 26, 2026 |
| DFTX | Daniel Karlin | Open market sell$73.6K | -1.3% | $13.15 | $73.6K | Dec 26, 2025 | Dec 29, 2025 |
| DFTX | Robert Barrow | Open market sell$339K | -3.2% | $13.15 | $339K | Dec 26, 2025 | Dec 29, 2025 |
| DFTX | Mark Sullivan | Open market sell$148K | -3.8% | $13.15 | $148K | Dec 26, 2025 | Dec 29, 2025 |