As of August 29, 2026, the three largest insider holders of DFTX are Robert Barrow (Chief Executive Officer, 1.47Mn shares), Robert Barrow (Chief Executive Officer, 752.45K shares), Daniel Karlin (Chief Medical Officer, 603.28K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Robert Barrow | Chief Executive Officer | 1,738,386 | 0 | 1,738,386 | 38.6% | 12 Aug, 2026 |
| 2 | Daniel Karlin | Chief Medical Officer | 875,144 | 0 | 875,144 | 19.4% | 12 Aug, 2026 |
| 3 | Mark Sullivan | Chief Legal Officer | 383,071 | 0 | 383,071 | 8.5% | 12 Aug, 2026 |
| 4 | Schond L. Greenway | Chief Financial Officer | 295,728 | 0 | 295,728 | 6.6% | 26 Mar, 2024 |
| 5 | Wernli Miri Halperin | Executive President | 287,409 | 0 | 287,409 | 6.4% | 22 Aug, 2024 |
| 6 | Brandi Roberts | Chief Financial Officer | 271,987 | 0 | 271,987 | 6.0% | 12 Aug, 2026 |
| 7 | Matthew T. Wiley | Chief Commercial Officer | 237,133 | 0 | 237,133 | 5.3% | 12 Aug, 2026 |
| 8 | Carrie Liao | Chief Accounting Officer | 171,820 | 0 | 171,820 | 3.8% | 26 Mar, 2025 |
| 9 | Cynthia W. Hu | Chief Legal Officersecretary | 80,004 | 0 | 80,004 | 1.8% | 28 Mar, 2022 |
| 10 | Carol A Vallone | Director | 64,314 | 0 | 64,314 | 1.4% | 15 Jun, 2026 |
| 11 | Roger Crystal | Director | 24,289 | 0 | 24,289 | 0.5% | 15 Jun, 2026 |
| 12 | Andreas Krebs | Director | 21,210 | 0 | 21,210 | 0.5% | 15 Jun, 2026 |
| 13 | David W Gryska | Director | 19,900 | 0 | 19,900 | 0.4% | 15 Jun, 2026 |
| 14 | Suzanne Louise Bruhn | Director | 19,623 | 0 | 19,623 | 0.4% | 23 Jun, 2023 |
| 15 | Brigid Makes | Director | 10,581 | 0 | 10,581 | 0.2% | 06 Jun, 2022 |
| 16 | Roger Adsett | Director | 3,555 | 0 | 3,555 | 0.1% | 15 Jun, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 12 Aug, 2026 | Robert Barrow | Chief Executive Officer | Acquired A | 375,000 | $0.00 | $0 | 1,473,246 | Direct |
| 12 Aug, 2026 | Mark Sullivan | Chief Legal Officer | Acquired A | 62,500 | $0.00 | $0 | 383,071 | Direct |
| 12 Aug, 2026 | Matthew T. Wiley | Chief Commercial Officer | Acquired A | 62,500 | $0.00 | $0 | 237,133 | Direct |
| 12 Aug, 2026 | Daniel Karlin | Chief Medical Officer | Acquired A | 100,000 | $0.00 | $0 | 603,282 | Direct |
| 12 Aug, 2026 | Brandi Roberts | Chief Financial Officer | Acquired A | 62,500 | $0.00 | $0 | 271,987 | Direct |
| 25 Jun, 2026 | Brandi Roberts | Chief Financial Officer | Disposed S | 3,013 | $45.03 | $135.68K | 209,487 | Direct |
| 25 Jun, 2026 | Robert Barrow | Chief Executive Officer | Disposed S | 29,208 | $45.03 | $1.32Mn | 1,098,246 | Direct |
| 25 Jun, 2026 | Mark Sullivan | Chief Legal Officer | Disposed S | 13,008 | $45.03 | $585.75K | 320,571 | Direct |
| 25 Jun, 2026 | Matthew T. Wiley | Chief Commercial Officer | Disposed S | 2,867 | $45.03 | $129.10K | 174,633 | Direct |
| 25 Jun, 2026 | Daniel Karlin | Chief Medical Officer | Disposed S | 10,035 | $45.03 | $451.88K | 503,282 | Direct |
| 22 Jun, 2026 | Brandi Roberts | Chief Financial Officer | Acquired A | 62,500 | $0.00 | $0 | 212,500 | Direct |
| 22 Jun, 2026 | Matthew T. Wiley | Chief Commercial Officer | Acquired A | 62,500 | $0.00 | $0 | 177,500 | Direct |
| 22 Jun, 2026 | Daniel Karlin | Chief Medical Officer | Acquired A | 100,000 | $0.00 | $0 | 513,317 | Direct |
| 22 Jun, 2026 | Robert Barrow | Chief Executive Officer | Acquired A | 375,000 | $0.00 | $0 | 1,127,454 | Direct |
| 22 Jun, 2026 | Mark Sullivan | Chief Legal Officer | Acquired A | 62,500 | $0.00 | $0 | 333,579 | Direct |
| 11 Jun, 2026 | Andreas Krebs | Director | Acquired A | 4,666 | $0.00 | $0 | 19,773 | Direct |
| 11 Jun, 2026 | Carol A Vallone | Director | Acquired A | 4,666 | $0.00 | $0 | 21,210 | Direct |
| 11 Jun, 2026 | Roger Crystal | Director | Acquired A | 4,666 | $0.00 | $0 | 24,289 | Direct |
| 11 Jun, 2026 | Roger Adsett | Director | Acquired A | 3,555 | $0.00 | $0 | 3,555 | Direct |
| 11 Jun, 2026 | David W Gryska | Director | Acquired A | 4,666 | $0.00 | $0 | 19,900 | Direct |