REGENXBIO Ownership | Who Owns REGENXBIO?

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REGENXBIO Ownership Summary

REGENXBIO is owned by 81.20% institutional investors, 6.27% insiders, and 12.53% 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	81.20%	6.27%	12.53%
Sector	Healthcare Stocks	244.59%	12.11%	-156.70%
Industry	Biotech Stocks	379.61%	11.70%	-291.31%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock	8.61M	18.83%	$100.73M
Blackrock funding, inc. /de	6.40M	12.20%	$76.64M
Redmile group	4.37M	8.33%	$52.34M
Vanguard group	3.37M	6.53%	$48.59M
State street	2.97M	5.67%	$35.59M
Jpmorgan chase	2.21M	4.22%	$26.19M
Vanguard capital management	2.11M	4.02%	$25.25M
Morgan stanley	1.95M	3.73%	$23.40M
Goldman sachs group	1.42M	2.71%	$17.03M
Aqr capital management	1.38M	2.63%	$16.51M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Sonic gp	453.08K	10.94%	$5.30M
22nw, lp	492.76K	5.64%	$5.90M
Aquilo capital management	346.30K	4.04%	$2.68M
Redmile group	4.37M	3.51%	$52.34M
Lion point capital, lp	26.60K	1.52%	$318.67K
Ghost tree capital	170.00K	0.62%	$1.99M
Archpoint investors	222.28K	0.56%	$2.66M
Gsk	271.46K	0.54%	$3.25M
Act capital management	67.50K	0.53%	$808.65K
Napatree capital	49.76K	0.47%	$582.24K

Top Buyers

Holder	Shares	% Assets	Change
Marshall wace, llp	1.28M	0.01%	1.28M
Blackrock	8.61M	0.00%	1.01M
Citadel advisors	669.02K	0.00%	669.02K
Blackrock funding, inc. /de	6.40M	0.00%	614.63K
Norges bank	449.40K	0.00%	449.40K

Top Sellers

Holder	Shares	% Assets	Change
Qube research	-	-	-1.31M
Jpmorgan chase	2.21M	0.00%	-1.27M
Assenagon asset management	169.28K	0.00%	-811.33K
Integral health asset management	800.00K	0.38%	-700.00K
Avidity partners management lp	532.00K	0.40%	-600.56K

New Positions

Holder	Shares	% Assets	Change	Value
Marshall wace, llp	1.28M	0.01%	1.28M	$15.39M
Norges bank	449.40K	0.00%	449.40K	$3.47M
Invenomic capital management lp	426.90K	0.20%	426.90K	$4.12M
Sixth street partners management company	396.45K	0.00%	396.45K	$4.75M
Lazard asset management	370.38K	0.01%	370.38K	$4.44M

Sold Out

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

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2026	175	-7.41%	42,573,567	-0.04%	81	1.19%	89	-7.29%	51	-10.53%
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%

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	1.93M	3.74%	4.43K
Vanguard Total Stock Mkt Idx Inv	1.50M	2.90%	68.10K
Vanguard US Total Market Shares ETF	1.40M	2.80%	-
Vanguard MStar Total Stk Mkt Idx Invest	1.77M	2.69%	269.10K
iShares Russell 2000 ETF	1.24M	2.41%	-22.08K
Vanguard Morn Total Stk Mkt Idx Investor	1.50M	2.34%	68.10K
SPDR® S&P Biotech ETF	738.99K	1.46%	1.65K
Invesco S&P 500 ETF	731.22K	1.45%	731.22K
JPMorgan Small Cap Growth A	629.84K	1.22%	-17.61K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Aug 26, 2026	Ciongoli Gregory Austin	-	Buy	$449.71K
Aug 27, 2026	Ciongoli Gregory Austin	-	Buy	$499.68K
Jul 02, 2026	PAKOLA STEVE	Chief Medical Officer	Sell	$29.48K
Jun 29, 2026	PAKOLA STEVE	Chief Medical Officer	Sell	$216.47K
Jul 01, 2026	PAKOLA STEVE	Chief Medical Officer	Sell	$472.28K

Insider Transactions Trends

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

RGNX Ownership FAQ

Who Owns REGENXBIO?

REGENXBIO shareholders are primarily institutional investors at 81.20%, followed by 6.27% insiders and 12.53% retail investors. The average institutional ownership in REGENXBIO's industry, Biotech Stocks , is 379.61%, 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 (6.4M shares, 12.20%), and Redmile group (4.37M shares, 8.33%). Together, they hold 39.36% 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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