Quick Takeaways
- BlackRock Portfolio Management LLC filed SCHEDULE 13G/A for REGENXBIO INC Common Stock (RGNX).
- Disclosed ownership: 4.1%.
- Date of event: 31 Dec 2025.
BlackRock Portfolio Management LLC - 31 Dec 2025 SCHEDULE 13G/A Report for REGENXBIO INC Common Stock (RGNX)
- Filing Manager
- BlackRock Portfolio Management LLC
- Reporting Manager
- BlackRock Portfolio Management LLC
- Security
- REGENXBIO INC Common Stock
- Symbol
- RGNX
- Shares outstanding
- 50,868,756 shares
- Disclosed Ownership
- 2,085,619 shares
- Ownership
- 4.1%
- Form type
- SCHEDULE 13G/A
- Filing time
- 21 Jan 2026, 12:26:45 UTC
- Date of event
- 31 Dec 2025
- Previous filing
- 15 Jul 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"BlackRock Portfolio Management LLC disclosed 4.1% ownership in REGENXBIO INC Common Stock (RGNX) on 31 Dec 2025."
What Changed
- Previous schedule filing date: 15 Jul 2025.
- Current filing was accepted on 21 Jan 2026, 12:26.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Source Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting Managers (1)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| BlackRock Portfolio Management LLC | 4.1% | 2,085,619 | 1,818,311 | 0 | Spencer Fleming | Managing Director |