$RGNX

$6.60 +$0.02 (0.3%) Close

$RGNX Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 66.0M shares outstanding

Who owns RGNX?

By type of holder

Institutions 63.3% Insiders 13.5% Everyone else 23.2%

Concentration Top 10 holders own 46.2%

Fox Allan M. 10.5% · BlackRock, Inc. 9.7%

Institutional ownership

63.3%

-1.2 pts vs last qtr

Institutional holders

162

-14 vs last qtr

Net shares bought

−762.1K

by institutions in Q2 2026

New / sold out

24 / 38

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Marshall Wace, LLP NEW +1.3M
Citadel Advisors LLC NEW +669.0K

Biggest sellers in Q2 2026

Qube Research & Technologies Ltd SOLD OUT −1.3M
Jpmorgan Chase & Co −1.3M

Who is planning to sell?

Notices of proposed sale, last 12 months

$939K

3 notices from 3 people

Shares covered

83.2K

0.13% of the company

Arranged in advance

100%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Stephen J. Pakola Officer 10b5-1 $518K
Stephen Pakola Officer 10b5-1 $368K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2016–FY2025

+95.3%

+7.72% a year

Each share's claim on the business

−48.8%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $286M

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years70% 3–5 years1% 1–3 years16% Under 1 year12%

Quarterly turnover

17.8%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting RGNX on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	6.4M	9.69%	+614.6K (+10.6%)	≤2021	0.0%
Shares held by quarter Peak holding8.8M (Q3'24) Change over 8 quarters−2.4M Share of the company9.690% BlackRock, Inc.'s full portfolio →
RG Redmile Group, LLC	4.4M	6.62%	Unchanged	≤2021	3.5%
Shares held by quarter Peak holding4.9M (Q3'24) Change over 8 quarters−524.1K Share of the company6.620% Redmile Group, LLC's full portfolio →

BlackRock, Inc.

6.4M

% of company

9.69%

Change vs last qtr

+614.6K (+10.6%)

Held since

≤2021

Redmile Group, LLC

4.4M

% of company

6.62%

Change vs last qtr

Unchanged

Held since

≤2021

28 more super investors behind a free account

See every manager holding REGENXBIO Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting RGNX on Form N-PORT; together they hold 22.8% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
SS State Street(R) SPDR(R) S&P(R) Biotech ETF SPDR Series Trust	$23.5M	2.0M	2.97%	0.22%	June 30, 2026
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$17.9M	1.5M	2.27%	0.00%	June 30, 2026

State Street(R) SPDR(R) S&P(R) Biotech ETF

SPDR Series Trust

Position value

$23.5M

% of company

2.97%

% of the fund

0.22%

As of

June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$17.9M

% of company

2.27%

% of the fund

0.00%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding REGENXBIO Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
FA Fox Allan M. Insider	6.9M	10.48%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company10.480% Fox Allan M.'s insider activity →
MK Mills Kenneth T. Insider	495.9K	0.75%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.750% Mills Kenneth T.'s insider activity →

Fox Allan M.

Insider

6.9M

% of company

10.48%

Change vs last qtr

—

Held since

—

Mills Kenneth T.

Insider

495.9K

% of company

0.75%

Change vs last qtr

—

Held since

—

14 more holders behind a free account

See every insider and 5%+ holder of REGENXBIO Inc..

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