REGENXBIO Ownership | Who Owns REGENXBIO?

Overview Forecast RevenueFinancials Chart Transcripts

REGENXBIO Ownership Summary

REGENXBIO is owned by 80.46% institutional investors, 7.64% insiders, and 11.89% 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	80.46%	7.64%	11.89%
Sector	Healthcare Stocks	42.50%	10.81%	46.69%
Industry	Biotech Stocks	45.24%	10.75%	44.01%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock	8.61M	18.83%	$100.73M
Blackrock funding, inc. /de	6.37M	12.37%	$61.48M
Redmile group	4.69M	9.12%	$45.29M
Jpmorgan chase	4.04M	7.84%	$38.96M
Vanguard group	3.34M	6.48%	$32.21M
State street	1.98M	3.86%	$19.15M
Goldman sachs group	1.85M	3.60%	$17.87M
Morgan stanley	1.70M	3.31%	$16.45M
Millennium management	1.32M	2.60%	$10.22M
Geode capital management	1.13M	2.19%	$10.86M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Sonic gp	453.08K	10.94%	$5.30M
Redmile group	4.69M	4.41%	$45.29M
22nw, lp	923.68K	4.20%	$8.91M
Aquilo capital management	346.30K	4.04%	$2.68M
Lion point capital, lp	57.75K	3.17%	$557.29K
Integral health asset management	1.10M	0.72%	$10.62M
Ghost tree capital	170.00K	0.62%	$1.99M
Archpoint investors	223.53K	0.59%	$2.16M
Napatree capital	49.76K	0.47%	$582.24K
Avidity partners management lp	532.00K	0.40%	$4.11M

Top Buyers

Holder	Shares	% Assets	Change
Millennium management	1.32M	0.01%	1.06M
Blackrock	8.61M	0.00%	1.01M
Morgan stanley	1.70M	0.00%	709.51K
Norges bank	449.40K	0.00%	449.40K
Invenomic capital management lp	426.90K	0.20%	426.90K

Top Sellers

Holder	Shares	% Assets	Change
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
Renaissance	309.49K	0.00%	-425.71K

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
Nebula research & development	151.29K	0.11%	151.29K	$1.24M
Susquehanna portfolio strategies	133.56K	0.02%	133.56K	$1.29M
Lazard asset management	45.40K	0.00%	45.40K	$372.00K

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 %
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%
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%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Small-Cap ETF	2.94M	5.94%	-
JPMorgan Small Cap Growth A	1.97M	3.89%	-21.17K
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	1.13M	2.23%	-
SPDR® S&P Biotech ETF	738.99K	1.46%	1.65K
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
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
May 12, 2025	Mills Kenneth T.	-	Sell	$163.05K
Oct 01, 2024	KARABELAS ARGERIS N	-	Sell	$101.05K

Insider Transactions Trends

Date	Buy	Sell
2025 Q4	-	1
2025 Q3	-	2
2025 Q2	-	1
2025 Q1	-	-
2024 Q4	-	1

RGNX Ownership FAQ

Who Owns REGENXBIO?

REGENXBIO shareholders are primarily institutional investors at 80.46%, followed by 7.64% insiders and 11.90% retail investors. The average institutional ownership in REGENXBIO's industry, Biotech Stocks , is 45.24%, which REGENXBIO exceeds.

Who owns the most shares of REGENXBIO?

REGENXBIO’s largest shareholders are Blackrock (8.61M shares, 18.83%), Blackrock funding, inc. /de (6.37M shares, 12.37%), and Redmile group (4.69M shares, 9.12%). Together, they hold 40.32% 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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