SEC Form 4 · Updated Daily
RGNX
— REGENXBIO INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| Mills Kenneth T. | Director | 495,925 | 2026-05-29 | A |
| Simpson Curran | Director · Officer | 338,053 | 2026-07-01 | F |
| Christmas Patrick J. | Officer | 205,968 | 2026-08-01 | F |
| PAKOLA STEVE | Officer | 205,541 | 2026-08-01 | F |
| Chan Mitchell | Officer | 122,815 | 2026-09-01 | F |
| Ciongoli Gregory Austin | 10%+ Owner · Director | 118,035 | 2026-08-27 | P |
| Malzahn Craig | Officer | 81,960 | 2026-09-01 | F |
| Zachary Jennifer | Officer | 31,871 | 2026-05-29 | A |
| MIGAUSKY GEORGE V | Director | 28,861 | 2026-05-29 | A |
| KARABELAS ARGERIS N | Director | 28,861 | 2026-05-29 | A |
| STUMP DAVID C | Director | 28,861 | 2026-05-29 | A |
| Tasse Daniel | Director · Officer | 28,861 | 2026-05-29 | A |
| Fox Allan M. | Director | 28,861 | 2026-05-29 | A |
| Glucksmann Alexandra | Director | 28,861 | 2026-05-29 | A |
| Bennett Jean | Director | 28,861 | 2026-05-29 | A |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-01 | Chan Mitchell | Tax withholding | 4,902 | $9.32 | 122,815 |
| 2026-09-01 | Malzahn Craig | Tax withholding | 234 | $9.32 | 81,960 |
| 2026-08-27 | Ciongoli Gregory Austin | Open-market buy | 53,407 | $9.36 | 118,035 |
| 2026-08-26 | Ciongoli Gregory Austin | Open-market buy | 49,196 | $9.14 | 64,628 |
| 2026-08-25 | Ciongoli Gregory Austin | Grant / award (derivative) | 69,609 | $0.00 | 69,609 |
| 2026-08-25 | Ciongoli Gregory Austin | Grant / award | 15,432 | $0.00 | 15,432 |
| 2026-08-01 | Christmas Patrick J. | Tax withholding | 4,699 | $9.69 | 205,968 |
| 2026-08-01 | PAKOLA STEVE | Tax withholding | 7,468 | $9.69 | 205,541 |
| 2026-07-02 | PAKOLA STEVE | Option exercise (derivative) | 2,161 | $0.00 | 64,812 |
| 2026-07-02 | PAKOLA STEVE | Open-market sale | 2,161 | $13.64 | 213,009 |
| 2026-07-02 | PAKOLA STEVE | Option exercise | 2,161 | $7.86 | 215,170 |
| 2026-07-01 | PAKOLA STEVE | Option exercise (derivative) | 36,725 | $0.00 | 66,973 |
| 2026-07-01 | PAKOLA STEVE | Open-market sale | 36,725 | $12.86 | 213,009 |
| 2026-07-01 | PAKOLA STEVE | Option exercise | 36,725 | $7.86 | 249,734 |
| 2026-07-01 | Simpson Curran | Tax withholding | 6,818 | $13.09 | 338,053 |
| 2026-06-30 | Simpson Curran | Grant / award | 1,453 | $10.18 | 344,871 |
| 2026-06-29 | PAKOLA STEVE | Open-market sale | 19,608 | $11.04 | 213,009 |
| 2026-05-29 | Bennett Jean | Grant / award (derivative) | 46,600 | $0.00 | 46,600 |
| 2026-05-29 | Bennett Jean | Grant / award | 9,807 | $0.00 | 28,861 |
| 2026-05-29 | Fox Allan M. | Grant / award (derivative) | 46,600 | $0.00 | 46,600 |
| 2026-05-29 | Fox Allan M. | Grant / award | 9,807 | $0.00 | 28,861 |
| 2026-05-29 | Glucksmann Alexandra | Grant / award (derivative) | 46,600 | $0.00 | 46,600 |
| 2026-05-29 | Glucksmann Alexandra | Grant / award | 9,807 | $0.00 | 28,861 |
| 2026-05-29 | KARABELAS ARGERIS N | Grant / award (derivative) | 46,600 | $0.00 | 46,600 |
| 2026-05-29 | KARABELAS ARGERIS N | Grant / award | 9,807 | $0.00 | 28,861 |
| 2026-05-29 | MIGAUSKY GEORGE V | Grant / award (derivative) | 46,600 | $0.00 | 46,600 |
| 2026-05-29 | MIGAUSKY GEORGE V | Grant / award | 9,807 | $0.00 | 28,861 |
| 2026-05-29 | Mills Kenneth T. | Grant / award (derivative) | 46,600 | $0.00 | 46,600 |
| 2026-05-29 | Mills Kenneth T. | Grant / award | 9,807 | $0.00 | 495,925 |
| 2026-05-29 | Zachary Jennifer | Grant / award (derivative) | 46,600 | $0.00 | 46,600 |
| 2026-05-29 | Zachary Jennifer | Grant / award | 9,807 | $0.00 | 31,871 |
| 2026-05-29 | STUMP DAVID C | Grant / award (derivative) | 46,600 | $0.00 | 46,600 |
| 2026-05-29 | STUMP DAVID C | Grant / award | 9,807 | $0.00 | 28,861 |
| 2026-05-29 | Tasse Daniel | Grant / award (derivative) | 46,600 | $0.00 | 46,600 |
| 2026-05-29 | Tasse Daniel | Grant / award | 9,807 | $0.00 | 28,861 |
| 2026-05-11 | PAKOLA STEVE | Open-market sale | 15,309 | $11.02 | 232,617 |
| 2026-03-10 | PAKOLA STEVE | Open-market sale | 5,124 | $10.35 | 247,926 |
| 2026-02-01 | PAKOLA STEVE | Tax withholding | 5,267 | $11.16 | 253,050 |
| 2026-02-01 | Christmas Patrick J. | Tax withholding | 4,700 | $11.16 | 210,667 |
| 2026-01-27 | Mills Kenneth T. | Option exercise (derivative) | 225,000 | $0.00 | 225,000 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.