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RGNX

REGENXBIO Inc.
$13.28 +0.19 (+1.45%) At close · Jul 2
Market Cap
$686.54M
Shares
51,697,621

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 179
Total Value: $354,232,726
Total Shares: 42,269,892
Showing 1–100 of 189 holdings by value · page 1 of 2

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 179 13F filers
Top Holder
13.7%
Jun 2023 → Mar 2026 · range 12.9% – 22.1%
of institutional value
Top 5
43.6%
Jun 2023 → Mar 2026 · range 43.6% – 60.0%
of institutional value
Top 10
62.0%
Jun 2023 → Mar 2026 · range 62.0% – 74.3%
of institutional value
HHI
535
Jun 2023 → Mar 2026 · range 535 – 904
Broadly held
Showing 100 of 189
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1590877 CUSIP 75901B107 13F (30d) 3 filings 3 filers Visit website Investor relations