Regenxbio Inc
Ownership
Ownership Structure
Who owns Regenxbio Inc (RGNX)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 86.7% of the shares are freely tradable; institutional investors hold 84.7%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 8.80 | 5,782,808 | +0.5 | 03/31/2026 |
| Redmile Group, LLC | 6.65 | 4,368,804 | +0.0 | 06/30/2026 |
| JPMorgan Chase & Co | 5.30 | 3,483,800 | -2.0 | 03/31/2026 |
| State Street Corp | 4.16 | 2,731,485 | +19.4 | 03/31/2026 |
| Morgan Stanley - Brokerage Accounts | 3.15 | 2,066,157 | +2.5 | 03/31/2026 |
| Vanguard Capital Management, LLC | 3.06 | 2,007,146 | +0.0 | 03/31/2026 |
| The Goldman Sachs Group Inc | 2.80 | 1,839,463 | +3.0 | 03/31/2026 |
| Qube Research & Technologies | 2.00 | 1,310,493 | +196.0 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| State Street® SPDR® S&P® Biotech ETF | 3.15 | 2,067,198 | -1.1 | 08/31/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 2.69 | 1,765,239 | +18.0 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Christmas Patrick J. | Chief Strategy & Legal Officer | 205,968 | 1,688,938 $ | Aug 1, 2026 | direct |
| Pakola Steve | Chief Medical Officer | 205,541 | 1,685,436 $ | Aug 1, 2026 | direct |
| Chan Mitchell | Chief Financial Officer | 122,815 | 1,007,083 $ | Sep 1, 2026 | direct |
| Ciongoli Gregory Austin | Director | 118,035 | 967,887 $ | Aug 27, 2026 | direct |
| Malzahn Craig | Chief Technology Officer | 81,960 | 672,072 $ | Sep 1, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 1, 2026 | Malzahn Craig | Chief Technology Officer | Other | 234 | 9.32 | 2,181 |
| Sep 1, 2026 | Chan Mitchell | Chief Financial Officer | Other | 4,902 | 9.32 | 45,687 |
| Aug 27, 2026 | Ciongoli Gregory Austin | Director | Buy | 53,407 | 9.36 | 499,676 |
| Aug 26, 2026 | Ciongoli Gregory Austin | Director | Buy | 49,196 | 9.14 | 449,706 |
| Aug 25, 2026 | Ciongoli Gregory Austin | Director | Other | 15,432 | 0.00 | – |
| Aug 1, 2026 | Pakola Steve | Chief Medical Officer | Other | 7,468 | 9.69 | 72,365 |
| Aug 1, 2026 | Christmas Patrick J. | Chief Strategy & Legal Officer | Other | 4,699 | 9.69 | 45,533 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.