REGENXBIO Ownership | Who Owns REGENXBIO?

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REGENXBIO Ownership Summary

REGENXBIO is owned by 81.64% institutional investors, 7.66% insiders, and 10.70% 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	81.64%	7.66%	10.70%
Sector	Healthcare Stocks	486.50%	11.08%	-397.59%
Industry	Biotech Stocks	304.14%	11.08%	-215.23%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock	8.61M	18.83%	$100.73M
Blackrock funding, inc. /de	6.76M	13.13%	$55.49M
Redmile group	4.78M	9.28%	$39.21M
Jpmorgan chase	4.14M	8.14%	$31.98M
State street	2.87M	6.28%	$33.62M
Vanguard group	2.99M	5.88%	$23.08M
Millennium management	1.32M	2.60%	$10.22M
Morgan stanley	1.18M	2.58%	$13.80M
Dimensional fund advisors lp	1.17M	2.31%	$9.05M
Geode capital management	1.09M	2.15%	$8.46M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Sonic gp	453.08K	10.94%	$5.30M
22nw, lp	923.68K	4.78%	$7.58M
Redmile group	4.78M	4.17%	$39.21M
Aquilo capital management	346.30K	4.04%	$2.68M
Lion point capital, lp	57.75K	2.34%	$446.41K
Exome asset management	226.06K	1.17%	$1.86M
Ghost tree capital	170.00K	0.62%	$1.99M
Archpoint investors	220.53K	0.53%	$1.81M
Integral health asset management	700.00K	0.53%	$5.75M
Napatree capital	49.76K	0.47%	$582.24K

Top Buyers

Holder	Shares	% Assets	Change
Jpmorgan chase	4.14M	0.00%	1.66M
Blackrock funding, inc. /de	6.76M	0.00%	1.30M
Millennium management	1.32M	0.01%	1.06M
Blackrock	8.61M	0.00%	1.01M
Norges bank	449.40K	0.00%	449.40K

Top Sellers

Holder	Shares	% Assets	Change
Vanguard group	2.99M	0.00%	-1.38M
Balyasny asset management	797.10K	0.01%	-601.40K
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

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	449.40K	0.00%	449.40K	$3.47M
Renaissance	271.30K	0.00%	271.30K	$2.10M
Nebula research & development	151.29K	0.11%	151.29K	$1.24M
Los angeles capital management	125.41K	0.00%	125.41K	$1.03M
Bradley foster & sargent inc/ct	54.89K	0.01%	54.89K	$450.62K

Sold Out

Holder	Change
Tradewinds capital management	-3.00
Mendota financial group	-4.00
Larson financial group	-4.00
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, 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%
Dec 31, 2024	170	-11.92%	38,152,884	-12.63%	75	1.02%	92	-3.16%	46	-9.80%
Sep 30, 2024	193	4.32%	43,669,664	-0.24%	85	1.15%	96	-4.95%	51	10.87%
Jun 30, 2024	181	-5.73%	43,737,010	3.28%	95	1.02%	100	-1.96%	44	-15.38%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Small-Cap ETF	2.94M	5.94%	-
JPMorgan Small Cap Growth A	1.99M	3.94%	29.61K
Vanguard US Total Market Shares ETF	1.40M	2.80%	-
Vanguard Total Stock Mkt Idx Inv	1.40M	2.77%	-31.06K
iShares Russell 2000 ETF	1.10M	2.18%	-20.89K
SPDR® S&P Biotech ETF	735.03K	1.46%	18.15K
Invesco S&P 500 ETF	731.22K	1.45%	731.22K
BlackRock Advantage Small Cap Core Instl	677.24K	1.34%	-
Vanguard Small Cap Index	561.89K	1.13%	3.30K
Vanguard Strategic Small-Cap Equity Inv	523.63K	1.04%	-108.75K

Recent Insider Transactions

Date	Name	Role	Activity	Value
May 12, 2025	Mills Kenneth T.	-	Sell	$163.05K
Oct 01, 2024	KARABELAS ARGERIS N	-	Sell	$101.05K
Sep 03, 2024	KARABELAS ARGERIS N	-	Sell	$106.95K
Sep 03, 2024	KARABELAS ARGERIS N	-	Sell	$8.64K
Aug 01, 2024	KARABELAS ARGERIS N	-	Sell	$129.12K

Insider Transactions Trends

Date	Buy	Sell
2025 Q3	-	-
2025 Q2	-	1
2025 Q1	-	-
2024 Q4	-	1
2024 Q3	-	13

RGNX Ownership FAQ

Who Owns REGENXBIO?

REGENXBIO shareholders are primarily institutional investors at 81.64%, followed by 7.66% insiders and 10.70% retail investors. The average institutional ownership in REGENXBIO's industry, Biotech Stocks , is 304.14%, 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 (6.76M shares, 13.13%), and Redmile group (4.78M shares, 9.28%). Together, they hold 41.23% 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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