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RGNX in the 13F filings

Regenxbio Inc · CUSIP 75901B107

Sector · Pharmaceuticals and biotechnologyTheme · Biological productsTheme · Healthcare: biopharma and medtech· L3VLUP-defined
Quarter
Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023Q2 2023Q1 2023
Quarter end
31 Dec 2025
the date the book describes
Filed
19 Feb 2026
latest of these filings; the earliest 22 Jan 2026
Managers listing it
24
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 1 listed it in both
Shares listed
4,020,397
combined, among listed positions
Reported value
$58m
combined, at the quarter end

Among the 92 comparable managers: 13 buyers (opened or added shares) and 10 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +20,302.

Managers listing RGNX in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

24 of 24 holders

ActionFiling
AQR Capital Management LLC1,361,962$20munder 0.1%Added+72,30717 Feb 2026 (the filing on sec.gov)
Acadian Asset Management LLC375,399$5.4munder 0.1%Trimmed-23,73310 Feb 2026 (the filing on sec.gov)
Renaissance Technologies LLC333,086$4.8munder 0.1%Added+23,60012 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)266,095$3.8munder 0.1%Added+70,90517 Feb 2026 (the filing on sec.gov)
Millennium Management LLC214,666$3.1munder 0.1%Added+128,00717 Feb 2026 (the filing on sec.gov)
Moore Capital Management LP200,000$2.9munder 0.1%Added+50,00017 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC196,521$2.8munder 0.1%Trimmed-94,64112 Feb 2026 (the filing on sec.gov)
Invesco Ltd157,903$2.3munder 0.1%Added+8,02319 Feb 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP140,000$2.0munder 0.1%Trimmed-60,00013 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP129,941$1.9munder 0.1%Trimmed-24,34517 Feb 2026 (the filing on sec.gov)
MFS Investment Management114,988$1.7munder 0.1%Trimmed-3,80722 Jan 2026 (the filing on sec.gov)
D. E. Shaw & Co.68,388$985kunder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP64,730$932kunder 0.1%Held017 Feb 2026 (the filing on sec.gov)
Man Group PLC63,571$915kunder 0.1%Trimmed-48,82717 Feb 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP55,610$801kunder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Two Sigma Advisers LP48,400$697kunder 0.1%Trimmed-21,70017 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC46,641$672kunder 0.1%Trimmed-8,88217 Feb 2026 (the filing on sec.gov)
Squarepoint Ops LLC42,918$618kunder 0.1%Trimmed-163,48913 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc38,995$562kunder 0.1%Added+317 Feb 2026 (the filing on sec.gov)
Point72 Asset Management LP33,384$481kunder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Tudor Investment Corp24,310$350kunder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP16,840$242kunder 0.1%Added+44817 Feb 2026 (the filing on sec.gov)
Susquehanna International Group LLP15,624$225kunder 0.1%Trimmed-75,68417 Feb 2026 (the filing on sec.gov)
Balyasny Asset Management LLC10,425$150kunder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

Q3 2025 to Q4 2025, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (5)

Exited (0)

No exit shown by a manager’s own filing.

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
4 in Q1 2024 to 1 in Q4 2025

Tracked managers listing it, at least.

0246201720182019202020212022202320242025
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
RGNX by quarter
QuarterHoldersReported valueBuyersSellers
Q4 20161$742kn.a.n.a.
Q1 20172$2.5mn.a.n.a.
Q2 20172$7.7mn.a.n.a.
Q3 20173$19mn.a.n.a.
Q4 20172$7.8mn.a.n.a.
Q1 20183$5.1mn.a.n.a.
Q2 20186$34mn.a.n.a.
Q3 20185$36mn.a.n.a.
Q4 20181$373kn.a.n.a.
Q1 20192$11mn.a.n.a.
Q2 20193$11mn.a.n.a.
Q3 20191$3.2mn.a.n.a.
Q4 20192$12mn.a.n.a.
Q1 20203$12mn.a.n.a.
Q2 20204$21mn.a.n.a.
Q3 20203$17mn.a.n.a.
Q4 20203$6.0mn.a.n.a.
Q1 20212$33mn.a.n.a.
Q2 20211$2.0mn.a.n.a.
Q1 20222$17mn.a.n.a.
Q2 20223$15mn.a.n.a.
Q3 20222$998kn.a.n.a.
Q4 20223$13mn.a.n.a.
Q1 20232$5.8mn.a.n.a.
Q2 20231$9.8mn.a.n.a.
Q3 20232$10mn.a.n.a.
Q4 20231$1.6m01
Q1 20244$6.8m40
Q2 20243$3.2m11
Q3 20242$2.1m10
Q4 20242$1.3m10
Q1 20252$1.4m10
Q2 20251$1.2m10
Q3 20251$1.4m00
Q4 20251$2.9m1310

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

RGNX and GILD →RGNX and AMGN →RGNX and ARGX →Choose a stock to compare with RGNX →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own RGNX, latest filings →Back to the 13F Explorer →