REGENXBIO Ownership | Who Owns REGENXBIO?

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REGENXBIO Ownership Summary

REGENXBIO is owned by 15.03% institutional investors, 7.78% insiders, and 77.19% retail investors. Blackrock is the largest institutional shareholder, holding 18.83% of RGNX shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 5.94% of its assets in REGENXBIO shares.

RGNX Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	REGENXBIO	15.03%	7.78%	77.19%
Sector	Healthcare Stocks	35.58%	11.87%	52.55%
Industry	Biotech Stocks	35.75%	11.83%	52.41%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock	8.61M	18.83%	$100.73M
Blackrock funding, inc. /de	5.78M	11.21%	$48.46M
Redmile group	4.37M	8.47%	$36.61M
Jpmorgan chase	3.48M	6.76%	$27.07M
Vanguard group	3.37M	6.53%	$48.59M
State street	2.73M	5.30%	$22.89M
Morgan stanley	2.07M	4.01%	$17.31M
Goldman sachs group	1.84M	3.57%	$15.41M
Integral health asset management	1.50M	2.91%	$12.57M
Qube research	1.31M	2.54%	$10.98M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Sonic gp	453.08K	10.94%	$5.30M
Aquilo capital management	346.30K	4.04%	$2.68M
22nw, lp	492.76K	2.83%	$4.13M
Redmile group	4.37M	2.42%	$36.61M
Lion point capital, lp	26.60K	1.33%	$222.91K
Ghost tree capital	170.00K	0.62%	$1.99M
Eversource wealth advisors	79.63K	0.62%	$20.21M
Integral health asset management	1.50M	0.60%	$12.57M
Napatree capital	49.76K	0.47%	$582.24K
Archpoint investors	222.28K	0.44%	$1.86M

Top Buyers

Holder	Shares	% Assets	Change
Blackrock	8.61M	0.00%	1.01M
Qube research	1.31M	0.01%	867.80K
Norges bank	449.40K	0.00%	449.40K
State street	2.73M	0.00%	444.75K
Invenomic capital management lp	426.90K	0.20%	426.90K

Top Sellers

Holder	Shares	% Assets	Change
Avidity partners management lp	532.00K	0.40%	-600.56K
Aquilo capital management	346.30K	4.04%	-584.41K
Adage capital partners gp	-	-	-500.00K
22nw, lp	492.76K	2.83%	-430.92K
Acadian asset management	3.23K	-	-372.17K

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	449.40K	0.00%	449.40K	$3.47M
Invenomic capital management lp	426.90K	0.20%	426.90K	$4.12M
Vanguard fiduciary trust	312.06K	0.00%	312.06K	$2.62M
Y-intercept (hong kong)	275.02K	0.04%	275.02K	$2.30M
Prosight management, lp	200.00K	0.27%	200.00K	$1.68M

Sold Out

Holder	Change
Tradewinds capital management	-3.00
Mendota financial group	-4.00
Smartleaf asset management	-5.00
Nelson, van denburg & campbell wealth management group	-8.00
Innealta capital	-8.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	63	-65.76%	7,751,176	-81.16%	15	0.24%	33	-63.33%	17	-70.69%
Dec 31, 2025	125	-28.98%	29,932,803	-27.67%	57	0.90%	60	-28.57%	40	-23.08%
Sep 30, 2025	168	-	41,425,722	-1.46%	80	1.21%	77	-9.41%	51	4.08%
Jun 30, 2025	167	-1.18%	42,031,093	1.56%	81	1.26%	84	-2.33%	49	-5.77%
Mar 31, 2025	171	-6.04%	41,665,554	-0.97%	81	1.18%	87	-9.38%	54	8.00%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Small-Cap ETF	2.94M	5.94%	-
State Street® SPDR® S&P® Biotech ETF	1.55M	3.01%	-15.30K
Vanguard US Total Market Shares ETF	1.40M	2.80%	-
Vanguard Total Stock Mkt Idx Inv	1.43M	2.77%	-
JPMorgan Small Cap Growth A	1.32M	2.57%	-24.13K
iShares Russell 2000 ETF	1.11M	2.15%	9.35K
SPDR® S&P Biotech ETF	738.99K	1.46%	1.65K
Invesco S&P 500 ETF	731.22K	1.45%	731.22K
Vanguard Small Cap Index	561.89K	1.13%	3.30K
Vanguard Institutional Extnd Mkt Idx Tr	535.36K	1.04%	3.38K

Recent Insider Transactions

Date	Name	Role	Activity	Value
May 11, 2026	PAKOLA STEVE	Chief Medical Officer	Sell	$168.71K
Mar 10, 2026	PAKOLA STEVE	Chief Medical Officer	Sell	$53.03K
Oct 09, 2025	Simpson Curran	Chief Executive Officer	Sell	$262.63K
Sep 29, 2025	Simpson Curran	Chief Executive Officer	Sell	$76.47K
Sep 10, 2025	Simpson Curran	Chief Executive Officer	Sell	$77.49K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	-	1
2026 Q1	-	1
2025 Q4	-	1
2025 Q3	-	2
2025 Q2	-	1

RGNX Ownership FAQ

Who Owns REGENXBIO?

REGENXBIO shareholders are primarily institutional investors at 15.03%, followed by 7.78% insiders and 77.19% retail investors. The average institutional ownership in REGENXBIO's industry, Biotech Stocks , is 35.75%, which REGENXBIO falls below.

Who owns the most shares of REGENXBIO?

REGENXBIO’s largest shareholders are Blackrock (8.61M shares, 18.83%), Blackrock funding, inc. /de (5.78M shares, 11.21%), and Redmile group (4.37M shares, 8.47%). Together, they hold 38.51% of REGENXBIO’s total shares outstanding.

Does Blackrock own REGENXBIO?

Yes, BlackRock owns 18.83% of REGENXBIO, totaling 8.61M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 100.73M$. In the last quarter, BlackRock increased its holdings by 1.01M shares, a 13.29% change.

Who is REGENXBIO’s biggest shareholder by percentage of total assets invested?

Sonic gp is REGENXBIO’s biggest shareholder by percentage of total assets invested, with 10.94% of its assets in 453.08K REGENXBIO shares, valued at 5.3M$.

Who is the top mutual fund holder of REGENXBIO shares?

iShares Core S&P Small-Cap ETF is the top mutual fund holder of REGENXBIO shares, with 5.94% of its total shares outstanding invested in 2.94M REGENXBIO shares.

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