Regenxbio

RGNX • NASDAQ

Regenxbio is a biotechnology company in the healthcare sector on NASDAQ, led by Curran M. Simpson, with a market cap of $702.1M. As of Q3 2025, 82% of shares are held by 165 institutional investors, with BlackRock, Inc. as the largest holder at 12.61%.

CEOCurran M. Simpson

Market Cap$702.1M

Biotechnology

Healthcare

Employees344.0

Websiteregenxbio.com

Country

United States of America

Overview

Overview of institutional ownership in RGNX as of Q3 2025 with a market cap of $487.5M

All Institutions

Institutions: 165
Value Held: $399.4M
Shares Held: 41.4M
Avg Position: $2.4M
Median Position: $253.2K

Hedge Funds

Hedge Funds: 28
Value Held: $102.4M
Shares Held: 10.6M
Avg Position: $3.7M
Median Position: $756.4K

Ownership Breakdown

Institutional (non-HF)

60.92%

$297.0M

Hedge Funds

21.01%

$102.4M

Retail & Other

18.07%

$88.1M

Based on market cap of $487.5M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in RGNX as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
B BlackRock, Inc. Institution	-	$61.5M 0.00% of portfolio	12.61% 6.4M shares	Q4 2015 Held for 9y 11m	$5.67T
R Redmile Group, LLC Hedge Fund•Sector	Amrit Nmn Nagpal Managing Partner	$45.3M 4.41% of portfolio	9.29% 4.7M shares	Q1 2017 Held for 8y 8m	$1.0B
JPMORGAN CHASE & CO Institution	Jamie Dimon CEO	$39.0M 0.00% of portfolio	7.99% 4.0M shares	Q3 2015 Held for 10y 2m	$1.56T
VANGUARD GROUP INC Institution	Salim Ramji CEO	$32.2M 0.00% of portfolio	6.61% 3.3M shares	Q3 2015 Held for 10y 2m	$6.69T
STATE STREET CORP Institution	Ronald P. O'Hanley CEO	$19.2M 0.00% of portfolio	3.93% 2.0M shares	Q4 2015 Held for 9y 11m	$2.88T
GOLDMAN SACHS GROUP INC Institution	David M. Solomon CEO	$17.9M 0.00% of portfolio	3.67% 1.9M shares	Q2 2016 Held for 9y 5m	$691.34B
MORGAN STANLEY RIA/Wealth	Jed Finn CEO	$16.4M 0.00% of portfolio	3.37% 1.7M shares	Q3 2015 Held for 10y 2m	$1.65T
AQR CAPITAL MANAGEMENT LLC Hedge Fund•Multi-Strategy	David Gary Kabiller Founder	$12.4M 0.01% of portfolio	2.55% 1.3M shares	Q1 2022 Held for 3y 8m	$156.17B
GEODE CAPITAL MANAGEMENT LLC ETF Provider	David Kenneth Lane CEO	$10.9M 0.00% of portfolio	2.23% 1.1M shares	Q4 2015 Held for 9y 11m	$1.57T
DIMENSIONAL FUND ADVISORS LP Long Only Manager	David Paul Butler CEO	$10.7M 0.00% of portfolio	2.19% 1.1M shares	Q2 2018 Held for 7y 5m	$466.32B

Net Capital Flow

Institutional buying and selling activity for RGNX in Q3 2025

Traded: −$251.6K
Buyers: 86
Sellers: 66
Total Bought: +$39.1M
Total Sold: −$39.3M
Avg Position: $2.2M

Biggest Buyers

Institution	Net Bought	Current Position
MORGAN STANLEY RIA/Wealth	+$6.8M +709.5K shares	$16.4M 1.7M shares
I Invenomic Capital Management LP Hedge Fund•Long/Short	+$4.1M +426.9K shares	$4.1M 426.9K shares
Integral Health Asset Management, LLC Hedge Fund•Sector	+$3.9M +400.0K shares	$10.6M 1.1M shares
AQR CAPITAL MANAGEMENT LLC Hedge Fund•Multi-Strategy	+$3.5M +359.5K shares	$12.4M 1.3M shares
P Pale Fire Capital SE Institution	+$2.2M +227.8K shares	$2.5M 255.6K shares
JPMORGAN CHASE & CO Institution	+$1.8M +185.2K shares	$39.0M 4.0M shares
H HRT FINANCIAL LLC Institution	+$1.7M +172.2K shares	$1.7M 172.2K shares
ACADIAN ASSET MANAGEMENT LLC Long Only Manager	+$1.5M +158.9K shares	$3.9M 399.1K shares
STATE STREET CORP Institution	+$1.4M +141.2K shares	$19.2M 2.0M shares
Susquehanna Portfolio Strategies, LLC Private Equity	+$1.3M +133.6K shares	$1.3M 133.6K shares

Biggest Sellers

Institution	Net Sold	Current Position
BALYASNY ASSET MANAGEMENT LLC Hedge Fund•Multi-Strategy	−$6.5M −797.1K shares	Sold Off 0 shares
RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant	−$4.1M −425.7K shares	$3.0M 309.5K shares
B BlackRock, Inc. Institution	−$3.7M −388.2K shares	$61.5M 6.4M shares
Trexquant Investment LP Hedge Fund•Quant	−$2.8M −288.8K shares	$2.6M 271.5K shares
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	−$2.3M −236.3K shares	$535.8K 55.5K shares
Exome Asset Management LLC Hedge Fund•Sector	−$1.9M −226.1K shares	Sold Off 0 shares
Marshall Wace LLP Institution	−$1.8M −222.3K shares	Sold Off 0 shares
Q Qube Research & Technologies Ltd Institution	−$1.7M −172.3K shares	$2.7M 284.8K shares
BANK OF AMERICA CORP /DE/ Institution	−$1.5M −157.2K shares	$4.0M 415.3K shares
Y Y-Intercept Ltd Institution	−$1.5M −177.0K shares	Sold Off 0 shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited RGNX in Q3 2025

New Positions: 6
New Value: $5.5M
Exited Positions: 15
Exited Value: $13.7M

New Positions

Institution	Position Value
I Invenomic Capital Management LP Hedge Fund•Long/Short	$4.1M 426.9K shares
Susquehanna Portfolio Strategies, LLC Private Equity	$1.3M 133.6K shares
Buckingham Strategic Partners RIA/Wealth	$106.5K 10.2K shares
FOSTER DYKEMA CABOT & PARTNERS, LLC RIA/Wealth	$18.8K 1.9K shares
O Optiver Holding B.V. Institution	$4.3K 446.0 shares
Sunbelt Securities, Inc. RIA/Wealth	$531.0 55.0 shares

Exited Positions

Institution	Previous Position
BALYASNY ASSET MANAGEMENT LLC Hedge Fund•Multi-Strategy	$6.5M 797.1K shares
Exome Asset Management LLC Hedge Fund•Sector	$1.9M 226.1K shares
Marshall Wace LLP Institution	$1.8M 222.3K shares
Y Y-Intercept Ltd Institution	$1.5M 177.0K shares
SPRINGBOK CAPITAL MANAGEMENT, LLC Fund of Funds	$675.9K 82.3K shares
LAZARD ASSET MANAGEMENT LLC Long Only Manager	$372.7K 45.4K shares
V Virtu Financial LLC Institution	$242.5K 29.5K shares
P Polymer Capital Management LLC Hedge Fund•Multi-Strategy	$192.2K 23.4K shares
CALIBER WEALTH MANAGEMENT, LLC / KS RIA/Wealth	$132.1K 16.1K shares
H Headlands Technologies LLC Institution	$107.9K 13.1K shares

Options Activity

Institutions with the largest Call and Put options positions in RGNX as of Q3 2025

Call Positions: 6
Call Value: $1.3M
Put Positions: 4
Put Value: $1.1M

Call Positions

Institution	Position Value
J JANE STREET GROUP, LLC Institution	$352.2K 365.0 contracts
Caption Management, LLC Hedge Fund•Long/Short	$289.5K 300.0 contracts
BARCLAYS PLC Institution	$206.5K 214.0 contracts
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	$205.5K 213.0 contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$161.2K 167.0 contracts
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$98.4K 102.0 contracts

Put Positions

Institution	Position Value
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$414.0K 429.0 contracts
Caption Management, LLC Hedge Fund•Long/Short	$289.5K 300.0 contracts
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$213.3K 221.0 contracts
BARCLAYS PLC Institution	$206.5K 214.0 contracts

Most Committed Institutions

Institutions with RGNX as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
2 22NW, LP Hedge Fund•Long/Short	James Paul Stoner CFO	4.65% $8.9M	1.83% 923.7K shares	Q1 2025 Held for 8 months	$191.5M
R Redmile Group, LLC Hedge Fund•Sector	Amrit Nmn Nagpal Managing Partner	4.41% $45.3M	9.29% 4.7M shares	Q1 2017 Held for 8y 8m	$1.0B
L Lion Point Capital, LP Hedge Fund•Event Driven	Carl Didric Marcus Cederholm CIO	3.17% $557.3K	0.11% 57.8K shares	Q1 2024 Held for 1y 8m	$17.6M
Integral Health Asset Management, LLC Hedge Fund•Sector	Bhagwan Jay Rao CIO	0.80% $10.6M	2.18% 1.1M shares	Q4 2023 Held for 1y 11m	$1.3B
B Botty Investors LLC Family Office	Alfredo Jose Botty CEO	0.59% $2.2M	0.44% 223.5K shares	Q1 2017 Held for 8y 8m	$364.5M
V Voss Capital LLC Institution	-	0.28% $4.8M	0.99% 500.0K shares	Q4 2024 Held for 11 months	$1.8B
P Pale Fire Capital SE Institution	-	0.27% $2.5M	0.51% 255.6K shares	Q4 2024 Held for 11 months	$912.4M
I Invenomic Capital Management LP Hedge Fund•Long/Short	Benjamin Robert Deschaine President	0.21% $4.1M	0.85% 426.9K shares	Q3 2025 Held for 2 months	$1.9B
A ADAR1 Capital Management, LLC Hedge Fund•Long/Short	Daniel Pawel Schneeberger Managing Partner	0.20% $2.0M	0.41% 205.4K shares	Q1 2024 Held for 1y 8m	$993.7M
Militia Capital Partners, LP Hedge Fund•Long/Short	-	0.12% $227.7K	0.05% 23.6K shares	Q2 2025 Held for 5 months	$195.8M