As of November 6, 2026, REGENXBIO Inc. is a publicly traded company (Nasdaq: RGNX); its largest reported holder is Redmile Group, LLC, with 9.9% on Schedule 13G/A of August 14, 2025, then JPMorgan Chase (5.3%). The largest insider holding is Allan M. Fox, a director, with 2,911,327 shares (4.4% of shares outstanding), per Form 4 of June 2, 2026 (Schedule 13G/A, August 14, 2025).
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Is REGENXBIO Inc. a real, registered company?
- REGENXBIO Inc. files with the SEC under CIK 1590877 (its SEC filings).
- Its shares are listed under the ticker RGNX on Nasdaq (SEC company record).
- business address in Rockville, Maryland, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under REGENXBIO Inc. in our court records and SEC 8-K records (as of 2026-11-06).
- Leadership changes: the latest reported is Kenneth T. Mills, Director (Form 8-K filed 2026-10-16). Check you are dealing with the people now in charge.
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names JPMorgan Chase (filed 2026-10-13).
Who are REGENXBIO Inc.'s owners and officers?
REGENXBIO Inc.: business address in Rockville, Maryland; industry Biological Products, (No Diagnostic Substances) (Form D, 2026-10-16).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G, 2026-10-13 | Jpmorgan Chase & Co. | 5.3% |
| Schedule 13G/A, 2026-06-04 | Jpmorgan Chase & Co | 4.4% |
| Schedule 13G, 2026-05-12 | State Street Corporation | 5.3% |
| Schedule 13G/A, 2026-03-27 | The Vanguard Group | 0% |
| Schedule 13G/A, 2026-01-21 | Blackrock Portfolio Management LLC | 4.1% |
| Schedule 13G/A, 2025-08-14 | Redmile Group, LLC | 9.9% |
| Schedule 13G, 2025-07-15 | Blackrock Portfolio Management LLC | 6.2% |
Questions about who owns REGENXBIO Inc.
Who owns REGENXBIO Inc.?
On this page, 3 holders' latest ownership filings report 5% or more of REGENXBIO Inc.: Redmile Group, LLC (9.9%, Schedule 13G/A, filed 2025-08-14), Jpmorgan Chase & Co. (5.3%, Schedule 13G, filed 2026-10-13) and State Street Corporation (5.3%, Schedule 13G, filed 2026-05-12).
Who are the largest shareholders of REGENXBIO Inc.?
By the share each holder's latest filing reports, the largest holders of REGENXBIO Inc. on this page are Redmile Group, LLC (9.9%), Jpmorgan Chase & Co. (5.3%) and State Street Corporation (5.3%).
When did Redmile Group, LLC buy into REGENXBIO Inc.?
The filings give report dates, not purchase dates. The earliest filing from Redmile Group, LLC on this page is the Schedule 13G/A, filed 2025-08-14, reporting 9.9%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 7 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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| Filed | Person | Role | Change | Effective |
|---|---|---|---|---|
| Form 8-K, 2026-10-16 | Kenneth T. Mills | Director | departed | 2026-10-21 |
| Form 8-K, 2026-08-25 | Gregory Ciongoli | Director | appointed | |
| Form 8-K, 2026-08-25 | Gregory Ciongoli | appointed |
Which insiders own REGENXBIO Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , a director: 2,911,327 shares (4.4% of shares outstanding), 28,861 held directly and 2,882,466 indirectly (Form 4, 2026-06-02).
- , a director: 495,925 shares (0.75% of shares outstanding) (Form 4, 2026-06-02).
- , the chief executive and a director: 338,053 shares (0.51% of shares outstanding) (Form 4, 2026-07-06).
- , the chief strategy and amp: 240,690 shares (0.36% of shares outstanding) (Form 4, 2026-11-03).
- , the chief medical officer: 240,263 shares (0.36% of shares outstanding) (Form 4, 2026-11-03).
Shares outstanding: 66,122,600 as of 2026-10-30, from the company's latest SEC cover page.
How much has REGENXBIO Inc. raised?
No fundraising or offering filing from REGENXBIO Inc. is on file with us.
Keep reading
More on REGENXBIO Inc. and the records around it.
REGENXBIO Inc. elsewhere on the record
- Leadership changes Aug 2026
Companies that share a holder
- Redmile Group, LLC also filed stake reports on 18 other companies: FATE THERAPEUTICS INC (Nov 2026), Electra Therapeutics, Inc. (Sep 2026), Neurogene Inc. (Aug 2026)
- JPMORGAN CHASE & CO also filed stake reports on 116 other companies: LEVI STRAUSS & CO (Nov 2026), Warner Music Group Corp. (Nov 2026), Andersen Group Inc. (Oct 2026)
- BlackRock Portfolio Management LLC also filed stake reports on 118 other companies: AMERISAFE INC (Nov 2026), BlackRock ETF Trust (Nov 2026), iShares J.P. Morgan EM Local Currency Bond ETF (Nov 2026)
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Cite this page
https://mentionfox.com/who-owns/regenxbio