RGNX · REGENXBIO Inc. · Shareholders & Ownership

$7.40 +0.25 (+3.50%)

Russell 2000 member Rebalance outlook locked

Market Cap

$471.99M

66.01M

Volume · Oct 20 1.3M Avg daily vol (3M) 1.38M

Every disclosed holder of RGNX in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns RGNX

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	164	42,078,555	63.74%	Yes
Insiders (Forms 3, 4, 5)	16	3,558,524	5.39%	Yes
13D/G-only blocks	2	4,175,619	6.33%	Yes
Remaining	—	16,200,494	24.54%	Rest
Registered funds (N-PORT, not summed)	174	14,444,295	21.88%	No

Shares outstanding: 66,013,192, the issuer's latest cover-page count restated onto today's split basis.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of RGNX

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	6,397,440	9.69%	+614,632	Jun 30, 2026	carried, not yet filed for the newest quarter
1.1	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	1,270,455	1.92%	+113,697	Jun 30, 2026	iShares Trust, not summed
1.2	iShares Russell 2000 Growth ETF Fund S000004343 · Registered fund · Jun 30, 2026 iShares Trust, not summed	378,118	0.57%	—	Jun 30, 2026	iShares Trust, not summed
1.3	BlackRock Advantage Small Cap Core Fund Fund S000039982 · Registered fund · May 29, 2026 BlackRock Funds, not summed	339,957	0.52%	-4,212	May 29, 2026	BlackRock Funds, not summed
1.4	iShares Biotechnology ETF Fund S000004350 · Registered fund · Jun 30, 2026 iShares Trust, not summed	336,179	0.51%	+4,756	Jun 30, 2026	iShares Trust, not summed
1.5	BlackRock Health Sciences Opportunities Portfolio Fund S000001877 · Registered fund · May 29, 2026 BlackRock Funds, not summed	214,663	0.33%	0	May 29, 2026	BlackRock Funds, not summed
2	Redmile Group, LLC 13F CIK 1425738 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	4,368,804	6.62%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
3	JPMORGAN CHASE & CO 13G CIK 19617 · Bank · Sep 30, 2026 Rule 13d-1(b), qualified institution, not summed	3,560,915	5.39%	-137,947	Sep 30, 2026	Rule 13d-1(b), qualified institution, not summed
3.1	JPMORGAN CHASE & CO 13F CIK 19617 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	2,214,169	3.35%	-1,269,631	Jun 30, 2026	carried, not yet filed for the newest quarter
4	BlackRock Portfolio Management LLC 13G CIK 2052113 · Holding company · Jun 30, 2025 Rule 13d-1(b), qualified institution	3,133,608	4.75%	—	Jun 30, 2025	Rule 13d-1(b), qualified institution
5	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	2,971,173	4.50%	+239,688	Jun 30, 2026	carried, not yet filed for the newest quarter
5.1	State Street(R) SPDR(R) S&P(R) Biotech ETF Fund S000010018 · Registered fund · Jun 30, 2026 SPDR SERIES TRUST, not summed	1,958,976	2.97%	+595,166	Jun 30, 2026	SPDR SERIES TRUST, not summed
5.2	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	17,500	0.03%	+2,000	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
5.3	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	1,123	0.00%	0	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
5.4	State Street Balanced Index Fund Fund S000082802 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	326	0.00%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
6	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,107,557	3.19%	+100,411	Jun 30, 2026	carried, not yet filed for the newest quarter
7	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,953,237	2.96%	-112,920	Jun 30, 2026	carried, not yet filed for the newest quarter
8	Fox Allan M. Insider CIK 1652936 · May 29, 2026 Director, issuer-wide	1,558,842	2.36%	—	May 29, 2026	Director, issuer-wide
9	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	1,496,139	2.27%	+68,100	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
10	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,421,453	2.15%	-418,010	Jun 30, 2026	carried, not yet filed for the newest quarter
10.1	Goldman Sachs Absolute Return Tracker Fund Fund S000020314 · Registered fund · Jun 30, 2026 GOLDMAN SACHS TRUST, not summed	9,346	0.01%	+6,456	Jun 30, 2026	GOLDMAN SACHS TRUST, not summed
11	AQR CAPITAL MANAGEMENT LLC 13F CIK 1167557 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,378,358	2.09%	+326,646	Jun 30, 2026	carried, not yet filed for the newest quarter
11.1	AQR Small Cap Momentum Style Fund Fund S000025644 · Registered fund · Mar 31, 2026 AQR Funds, not summed	7,449	0.01%	—	Mar 31, 2026	AQR Funds, not summed
12	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,355,554	2.05%	+336,653	Jun 30, 2026	carried, not yet filed for the newest quarter
13	MARSHALL WACE, LLP 13F CIK 1318757 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,284,950	1.95%	+1,284,950	Jun 30, 2026	carried, not yet filed for the newest quarter
14	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,241,296	1.88%	+103,798	Jun 30, 2026	carried, not yet filed for the newest quarter
15	GIC Private Ltd 13G CIK 936828 · Unknown · Dec 31, 2023 Rule 13d-1(c), passive investor	1,042,011	1.58%	—	Dec 31, 2023	Rule 13d-1(c), passive investor
16	Integral Health Asset Management, LLC 13F CIK 1773206 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	800,000	1.21%	-700,000	Jun 30, 2026	carried, not yet filed for the newest quarter
17	Nuveen, LLC 13F CIK 1871926 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	740,026	1.12%	+158,010	Jun 30, 2026	carried, not yet filed for the newest quarter
17.1	Nuveen Quant Small Cap Equity Fund Fund S000005386 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	855,170	1.30%	+224,960	Jul 31, 2026	TIAA-CREF Funds, not summed
17.2	Nuveen Small Cap Blend Index Fund Fund S000005367 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	64,225	0.10%	+6,292	Jul 31, 2026	TIAA-CREF Funds, not summed
17.3	Nuveen Equity Index Fund Fund S000005360 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	27,882	0.04%	0	Jul 31, 2026	TIAA-CREF Funds, not summed
17.4	Nuveen Life Small Cap Equity Fund Fund S000005093 · Registered fund · Jun 30, 2026 TIAA-CREF Life Funds, not summed	12,843	0.02%	+3,030	Jun 30, 2026	TIAA-CREF Life Funds, not summed
17.5	TIAA Separate Account VA-1 - Stock Index Account Fund S000005098 · Registered fund · Jun 30, 2026 TIAA Separate Account VA-1, not summed	1,062	0.00%	0	Jun 30, 2026	TIAA Separate Account VA-1, not summed
18	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	731,586	1.11%	-278,795	Jun 30, 2026	carried, not yet filed for the newest quarter
18.1	Dimensional U.S. Core Equity 2 ETF Fund S000070903 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	145,383	0.22%	0	Jul 31, 2026	Dimensional ETF Trust, not summed
18.2	U.S. MICRO CAP PORTFOLIO Fund S000000948 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	111,201	0.17%	+17,551	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
18.3	U.S. SMALL CAP PORTFOLIO Fund S000000971 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	98,060	0.15%	-23,685	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
18.4	U.S. VECTOR EQUITY PORTFOLIO Fund S000000982 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	23,197	0.04%	—	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
18.5	Dimensional U.S. Equity Market ETF Fund S000070902 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	12,166	0.02%	-8,744	Jul 31, 2026	Dimensional ETF Trust, not summed
19	D. E. Shaw & Co., Inc. 13F CIK 1009207 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	712,814	1.08%	+426,813	Jun 30, 2026	carried, not yet filed for the newest quarter
20	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	669,808	1.01%	+114,916	Jun 30, 2026	carried, not yet filed for the newest quarter
21	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	669,023	1.01%	+669,023	Jun 30, 2026	carried, not yet filed for the newest quarter
22	JPMorgan Small Cap Growth Fund Fund S000003859 · Registered fund · Jun 30, 2026 JPMorgan Trust II, not summed	629,843	0.95%	-694,946	Jun 30, 2026	JPMorgan Trust II, not summed
23	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	564,476	0.86%	+32,883	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
24	STIFEL FINANCIAL CORP 13F CIK 720672 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	560,727	0.85%	+167,958	Jun 30, 2026	carried, not yet filed for the newest quarter
25	BANK OF AMERICA CORP /DE/ 13F CIK 70858 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	518,545	0.79%	+193,685	Jun 30, 2026	carried, not yet filed for the newest quarter
26	Mills Kenneth T. Insider CIK 1652824 · May 29, 2026 Director, issuer-wide	495,925	0.75%	+9,807	May 29, 2026	Director, issuer-wide
27	22NW, LP 13F CIK 1694297 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	492,759	0.75%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
28	MILLENNIUM MANAGEMENT LLC 13F CIK 1273087 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	480,762	0.73%	+195,588	Jun 30, 2026	carried, not yet filed for the newest quarter
29	VANGUARD STRATEGIC SMALL-CAP EQUITY FUND Fund S000012432 · Registered fund · Jun 30, 2026 VANGUARD HORIZON FUNDS, not summed	467,248	0.71%	+89,471	Jun 30, 2026	VANGUARD HORIZON FUNDS, not summed
30	Pale Fire Capital SE 13F CIK 1922318 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	466,209	0.71%	-27,517	Jun 30, 2026	carried, not yet filed for the newest quarter
31	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	421,839	0.64%	+28,199	Jun 30, 2026	carried, not yet filed for the newest quarter
31.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	25,040	0.04%	+4,602	Jun 30, 2026	Northern Funds, not summed
31.2	Small Cap Core Fund Fund S000001244 · Registered fund · Jun 30, 2026 Northern Funds, not summed	9,807	0.01%	-467	Jun 30, 2026	Northern Funds, not summed
32	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	396,450	0.60%	+5,849	Jun 30, 2026	carried, not yet filed for the newest quarter
32.1	Schwab U.S. Small-Cap ETF Fund S000026636 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	225,064	0.34%	-3,488	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
32.2	Schwab Small-Cap Index Fund Fund S000005912 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	116,373	0.18%	+12,767	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
32.3	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	32,786	0.05%	0	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
32.4	Schwab U.S. Broad Market ETF Fund S000026631 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	25,000	0.04%	0	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
33	LAZARD ASSET MANAGEMENT LLC 13F CIK 1207017 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	370,375	0.56%	+370,375	Jun 30, 2026	carried, not yet filed for the newest quarter
34	FMR LLC 13F CIK 315066 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	342,858	0.52%	+31,590	Jun 30, 2026	carried, not yet filed for the newest quarter
34.1	Fidelity Small Cap Index Fund Fund S000033638 · Registered fund · Jul 31, 2026 Fidelity Salem Street Trust, not summed	527,935	0.80%	+61,058	Jul 31, 2026	Fidelity Salem Street Trust, not summed
34.2	Fidelity Enhanced Small Cap Core ETF Fund S000081807 · Registered fund · Jun 30, 2026 Fidelity Covington Trust, not summed	322,770	0.49%	+32,443	Jun 30, 2026	Fidelity Covington Trust, not summed
34.3	Fidelity Extended Market Index Fund Fund S000006021 · Registered fund · May 31, 2026 Fidelity Concord Street Trust, not summed	246,936	0.37%	+57,484	May 31, 2026	Fidelity Concord Street Trust, not summed
34.4	Strategic Advisers U.S. Total Stock Fund Fund S000084926 · Registered fund · May 31, 2026 Fidelity Rutland Square Trust II, not summed	150,176	0.23%	+33,482	May 31, 2026	Fidelity Rutland Square Trust II, not summed
34.5	Fidelity Total Market Index Fund Fund S000006026 · Registered fund · May 31, 2026 Fidelity Concord Street Trust, not summed	85,300	0.13%	0	May 31, 2026	Fidelity Concord Street Trust, not summed
35	Simpson Curran Insider CIK 1346164 · Jul 1, 2026 Director, Chief Executive Officer, issuer-wide	338,053	0.51%	-4,414	Jul 1, 2026	Director, Chief Executive Officer, issuer-wide
36	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	337,159	0.51%	+25,095	Jun 30, 2026	carried, not yet filed for the newest quarter
37	Quantinno Capital Management LP 13F CIK 1759654 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	300,127	0.45%	+256,176	Jun 30, 2026	carried, not yet filed for the newest quarter
38	VANGUARD MARKET NEUTRAL FUND Fund S000019457 · Registered fund · Jun 30, 2026 VANGUARD MONTGOMERY FUNDS, not summed	281,985	0.43%	+40,132	Jun 30, 2026	VANGUARD MONTGOMERY FUNDS, not summed
39	GSK plc 13F CIK 1131399 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	271,456	0.41%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
40	SUSQUEHANNA INTERNATIONAL GROUP, LLP 13F CIK 1446194 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	264,912	0.40%	+173,828	Jun 30, 2026	carried, not yet filed for the newest quarter
41	RENAISSANCE TECHNOLOGIES LLC 13F CIK 1037389 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	256,686	0.39%	-48,600	Jun 30, 2026	carried, not yet filed for the newest quarter
42	JANE STREET GROUP, LLC 13F CIK 1595888 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	253,493	0.38%	+147,945	Jun 30, 2026	carried, not yet filed for the newest quarter
43	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	249,947	0.38%	-7,516	Jun 30, 2026	carried, not yet filed for the newest quarter
44	VANGUARD RUSSELL 2000 INDEX FUND Fund S000030003 · Registered fund · May 31, 2026 VANGUARD SCOTTSDALE FUNDS, not summed	242,468	0.37%	+10,476	May 31, 2026	VANGUARD SCOTTSDALE FUNDS, not summed
45	Jump Financial, LLC 13F CIK 1831577 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	239,700	0.36%	+18,911	Jun 30, 2026	carried, not yet filed for the newest quarter
46	Danos Olivier Insider CIK 1701180 · Feb 1, 2025 Chief Scientific Officer, issuer-wide	226,348	0.34%	-5,452	Feb 1, 2025	Chief Scientific Officer, issuer-wide
47	Hudson Bay Capital Management LP 13F CIK 1393825 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	225,000	0.34%	+45,000	Jun 30, 2026	carried, not yet filed for the newest quarter
48	ArchPoint Investors 13F CIK 1483472 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	222,278	0.34%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
49	Corient Private Wealth LLC 13F CIK 1948780 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	217,661	0.33%	+217,661	Jun 30, 2026	carried, not yet filed for the newest quarter
50	DEUTSCHE BANK AG\ 13F CIK 948046 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	207,835	0.31%	+10,864	Jun 30, 2026	carried, not yet filed for the newest quarter
50.1	DWS Small Cap Index VIP Fund S000006223 · Registered fund · Jun 30, 2026 DEUTSCHE DWS INVESTMENTS VIT FUNDS, not summed	7,568	0.01%	+1,013	Jun 30, 2026	DEUTSCHE DWS INVESTMENTS VIT FUNDS, not summed

29 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 269 holders

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Key facts CIK 1590877 CUSIP 75901B107 13F (30d) 15 filings 15 filers Visit website Investor relations