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RGNX · REGENXBIO Inc. · Holdings

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$7.20 +0.05 (+0.70%)
Market Cap
$457.14M
Shares
66.01M
Volume · Oct 19 1.3M Avg daily vol (3M) 1.38M

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.

Institutional holdings are being reconciled with SEC filings. Holder totals and changes may be incomplete until reconciliation finishes.
The Sep 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. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 167
Total Value: $510,210,263
Total Shares: 42,773,755
Showing 1–100 of 175 holdings by value · page 1 of 2

Institutional Ownership Trend

27 quarters

Holder Concentration

Across 168 13F filers
Top Holder
14.9%
Sep 2023 → Jun 2026 · range 12.9% – 21.4%
of institutional value
Top 5
42.2%
Sep 2023 → Jun 2026 · range 42.2% – 60.0%
of institutional value
Top 10
59.5%
Sep 2023 → Jun 2026 · range 59.5% – 74.3%
of institutional value
HHI
532
Sep 2023 → Jun 2026 · range 516 – 904
Broadly held

Who Holds RGNX

Last 8 quarters through Sep 30, 2026 (filing window open)

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026, the newest closed quarter: 165 filers, like-for-like change -0.8%; actively managed books -3.9%; index-like books +3.7%.

Holder type Share Filers Change
Registered adviser 41.7% 80 +6.6%
Exempt adviser 3.6% 3 -6.5%
Adviser 2.0% 7 +46.2%
Bank 15.9% 12 -10.2%
Broker-dealer 0.1% 2 +2025.1%
Non-US 0.5% 1 +5.5%
Holding company 21.7% 5 +5.8%
Insurer 0.0% 0 -100.0%
Benefit plan 0.0% 0 -100.0%
Unknown 14.5% 55 -17.9%

The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type, client base and private funds come from each filer's current regulatory profile. Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Excluded 1 holder with no observed 2026-03-31 13F and 2 holders with no observed 2026-06-30 13F.

Showing 100 of 175
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Holder Value (USD) % of 13F Shares Open

Showing the top 100 of 175 holders. Create a free account to see every holder, past quarters, search, filters and CSV export.

Key facts CIK 1590877 CUSIP 75901B107 13F (30d) 15 filings 15 filers Visit website Investor relations