Regenxbio's top three insider shareholders as of September 29, 2026 are Allan M. Fox (Director, 1.53Mn shares), Kenneth T. Mills (President And Ceo, 495.93K shares), Curran Simpson (Chief Executive Officer, 342.47K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Kenneth T. Mills | President And Ceo | 495,925 | 0 | 495,925 | 21.8% | 02 Jun, 2026 |
| 2 | Curran Simpson | Chief Executive Officer | 342,467 | 0 | 342,467 | 15.0% | 08 Jan, 2026 |
| 3 | Vittal Vasista | Chief Financial Officer | 246,534 | 0 | 246,534 | 10.8% | 21 Mar, 2024 |
| 4 | Olivier Danos | Chief Scientific Officer | 226,348 | 0 | 226,348 | 9.9% | 04 Apr, 2025 |
| 5 | Patrick J. Christmas | Chief Strategy Legal Officer | 205,968 | 0 | 205,968 | 9.0% | 04 Aug, 2026 |
| 6 | Steve Pakola | Chief Medical Officer | 205,541 | 0 | 205,541 | 9.0% | 04 Aug, 2026 |
| 7 | Mitchell Chan | Chief Financial Officer | 122,815 | 0 | 122,815 | 5.4% | 03 Sep, 2026 |
| 8 | Gregory Austin Ciongoli | Director | 118,035 | 0 | 118,035 | 5.2% | 27 Aug, 2026 |
| 9 | Craig Malzahn | Chief Technology Officer | 81,960 | 0 | 81,960 | 3.6% | 03 Sep, 2026 |
| 10 | Jennifer Zachary | Director | 31,871 | 0 | 31,871 | 1.4% | 02 Jun, 2026 |
| 11 | Allan M. Fox | Director | 28,861 | 0 | 28,861 | 1.3% | 02 Jun, 2026 |
| 12 | Argeris N Karabelas | Director | 28,861 | 0 | 28,861 | 1.3% | 02 Jun, 2026 |
| 13 | David C Stump | Director | 28,861 | 0 | 28,861 | 1.3% | 02 Jun, 2026 |
| 14 | Daniel Tasse | Director | 28,861 | 0 | 28,861 | 1.3% | 02 Jun, 2026 |
| 15 | George V Migausky | Director | 28,861 | 0 | 28,861 | 1.3% | 02 Jun, 2026 |
| 16 | Alexandra Glucksmann | Director | 28,861 | 0 | 28,861 | 1.3% | 02 Jun, 2026 |
| 17 | Jean Bennett | Director | 28,861 | 0 | 28,861 | 1.3% | 02 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 |
|---|---|---|---|---|---|---|---|---|
| 01 Sep, 2026 | Craig Malzahn | Chief Technology Officer | Disposed F | 234 | $9.32 | $2.18K | 81,960 | Direct |
| 01 Sep, 2026 | Mitchell Chan | Chief Financial Officer | Disposed F | 4,902 | $9.32 | $45.69K | 122,815 | Direct |
| 25 Aug, 2026 | Gregory Austin Ciongoli | Director | Acquired A | 15,432 | $0.00 | $0 | 15,432 | Direct |
| 26 Aug, 2026 | Gregory Austin Ciongoli | Director | Acquired P | 49,196 | $9.14 | $449.71K | 64,628 | Direct |
| 27 Aug, 2026 | Gregory Austin Ciongoli | Director | Acquired P | 53,407 | $9.36 | $499.68K | 118,035 | Direct |
| 25 Aug, 2026 | Gregory Austin Ciongoli | Director | Acquired A | 69,609 | $0.00 | $0 | 69,609 | Direct |
| 01 Aug, 2026 | Patrick J. Christmas | Chief Strategy Legal Officer | Disposed F | 4,699 | $9.69 | $45.53K | 205,968 | Direct |
| 01 Aug, 2026 | Steve Pakola | Chief Medical Officer | Disposed F | 7,468 | $9.69 | $72.36K | 205,541 | Direct |
| 02 Jul, 2026 | Steve Pakola | Chief Medical Officer | Acquired M | 2,161 | $7.86 | $16.99K | 215,170 | Direct |
| 02 Jul, 2026 | Steve Pakola | Chief Medical Officer | Disposed S | 2,161 | $13.64 | $29.48K | 213,009 | Direct |
| 02 Jul, 2026 | Steve Pakola | Chief Medical Officer | Disposed M | 2,161 | $0.00 | $0 | 64,812 | Direct |
| 29 Jun, 2026 | Steve Pakola | Chief Medical Officer | Disposed S | 19,608 | $11.04 | $216.47K | 213,009 | Direct |
| 01 Jul, 2026 | Steve Pakola | Chief Medical Officer | Acquired M | 36,725 | $7.86 | $288.66K | 249,734 | Direct |
| 01 Jul, 2026 | Steve Pakola | Chief Medical Officer | Disposed S | 36,725 | $12.86 | $472.28K | 213,009 | Direct |
| 01 Jul, 2026 | Steve Pakola | Chief Medical Officer | Disposed M | 36,725 | $0.00 | $0 | 66,973 | Direct |
| 29 May, 2026 | David C Stump | Director | Acquired A | 9,807 | $0.00 | $0 | 28,861 | Direct |
| 29 May, 2026 | Argeris N Karabelas | Director | Acquired A | 9,807 | $0.00 | $0 | 28,861 | Direct |
| 29 May, 2026 | George V Migausky | Director | Acquired A | 9,807 | $0.00 | $0 | 28,861 | Direct |
| 29 May, 2026 | Daniel Tasse | Director | Acquired A | 9,807 | $0.00 | $0 | 28,861 | Direct |
| 29 May, 2026 | Kenneth T. Mills | Director | Acquired A | 9,807 | $0.00 | $0 | 495,925 | Direct |