MGX · Metagenomi Therapeutics, Inc. · Shareholders & Ownership

$0.81 +0.03 (+3.55%) At close · Oct 19

Market Cap

$30.67M

37.78M

Volume · Oct 19 155.96K Avg daily vol (3M) 157.61K

Every disclosed holder of MGX 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 MGX

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)	42	6,190,681	16.39%	Yes
Insiders (Forms 3, 4, 5)	0	0	0.00%	No
13D/G-only blocks	1	2,762,142	7.31%	Yes
Remaining	—	28,824,282	76.30%	Rest
Registered funds (N-PORT, not summed)	13	1,871,799	4.95%	No

Shares outstanding: 37,777,105, the issuer's latest cover-page count restated onto today's split basis.

Insiders are listed but not summed: the issuer has more than one class of common stock and Forms 3, 4 and 5 report one issuer-wide balance across them.

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 MGX

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	Thomas Brian C. 13G CIK 1996097 · Unknown · Jun 30, 2026 Rule 13d-1(d), exempt investor	2,762,142	7.31%	—	Jun 30, 2026	Rule 13d-1(d), exempt investor
1.1	Thomas Brian C. Insider CIK 1996097 · Dec 5, 2025 Director, issuer-wide, not summed	2,510,960	6.65%	-3,830	Dec 5, 2025	Director, issuer-wide, not summed
2	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,077,700	2.85%	+19,756	Jun 30, 2026	carried, not yet filed for the newest quarter
3	Irish Jian Insider CIK 1995697 · Sep 8, 2026 Director, See Remarks, issuer-wide, not summed	960,820	2.54%	-2,140	Sep 8, 2026	Director, See Remarks, issuer-wide, not summed
4	RENAISSANCE TECHNOLOGIES LLC 13F CIK 1037389 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	742,400	1.97%	-45,500	Jun 30, 2026	carried, not yet filed for the newest quarter
5	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	741,407	1.96%	0	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
6	Catalio Capital Management, LP 13F CIK 1958125 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	528,993	1.40%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
7	Peapod Lane Capital LLC 13F CIK 2050979 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	525,024	1.39%	+8,263	Jun 30, 2026	carried, not yet filed for the newest quarter
8	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	513,701	1.36%	+16,934	Jun 30, 2026	carried, not yet filed for the newest quarter
9	BRIDGEWAY CAPITAL MANAGEMENT, LLC 13F CIK 1107261 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	400,300	1.06%	+4,500	Jun 30, 2026	carried, not yet filed for the newest quarter
10	WELLS FARGO & COMPANY/MN 13F CIK 72971 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	379,508	1.00%	+177,370	Jun 30, 2026	carried, not yet filed for the newest quarter
11	Ultra-Small Company Fund Fund S000004423 · Registered fund · Jun 30, 2026 Bridgeway Funds, Inc., not summed	327,100	0.87%	0	Jun 30, 2026	Bridgeway Funds, Inc., not summed
12	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	315,460	0.84%	-1,077	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
13	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	288,665	0.76%	-69,535	Jun 30, 2026	carried, not yet filed for the newest quarter
14	PURA VIDA INVESTMENTS, LLC 13F CIK 1590144 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	264,391	0.70%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
15	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	257,631	0.68%	+27,497	Jun 30, 2026	carried, not yet filed for the newest quarter
15.1	iShares Micro-Cap ETF Fund S000004439 · Registered fund · Jun 30, 2026 iShares Trust, not summed	95,479	0.25%	+25,352	Jun 30, 2026	iShares Trust, not summed
16	Wapnick Pamela Insider CIK 1995657 · Sep 8, 2026 Chief Financial Officer, issuer-wide, not summed	206,580	0.55%	-1,911	Sep 8, 2026	Chief Financial Officer, issuer-wide, not summed
17	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	171,251	0.45%	+1,077	Jun 30, 2026	carried, not yet filed for the newest quarter
18	JACOBS LEVY EQUITY MANAGEMENT, INC 13F CIK 884414 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	160,000	0.42%	-222,153	Jun 30, 2026	carried, not yet filed for the newest quarter
19	Wein Matthew Insider CIK 2009713 · Sep 8, 2026 See Remarks, issuer-wide, not summed	126,133	0.33%	-358	Sep 8, 2026	See Remarks, issuer-wide, not summed
20	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	119,850	0.32%	-577	Jun 30, 2026	carried, not yet filed for the newest quarter
21	MILLENNIUM MANAGEMENT LLC 13F CIK 1273087 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	114,025	0.30%	-56,079	Jun 30, 2026	carried, not yet filed for the newest quarter
22	Noonberg Sarah B. Insider CIK 1706301 · Jun 6, 2025 Director, issuer-wide, not summed	109,135	0.29%	-5,239	Jun 6, 2025	Director, issuer-wide, not summed
23	Man Group plc 13F CIK 1637460 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	109,130	0.29%	+30,494	Jun 30, 2026	carried, not yet filed for the newest quarter
24	Resolute Advisors LLC 13F CIK 1800217 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	89,944	0.24%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
25	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	68,938	0.18%	-6,234	Jun 30, 2026	carried, not yet filed for the newest quarter
26	RBF Capital, LLC 13F CIK 1134621 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	64,021	0.17%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
27	Ultra-Small Company Market Fund Fund S000004424 · Registered fund · Jun 30, 2026 Bridgeway Funds, Inc., not summed	62,200	0.16%	0	Jun 30, 2026	Bridgeway Funds, Inc., not summed
28	XTX Topco Ltd 13F CIK 1828301 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	55,707	0.15%	+15,125	Jun 30, 2026	carried, not yet filed for the newest quarter
29	BBR PARTNERS, LLC 13F CIK 1352467 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	53,403	0.14%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
30	JANE STREET GROUP, LLC 13F CIK 1595888 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	38,396	0.10%	-113,044	Jun 30, 2026	carried, not yet filed for the newest quarter
31	Fortitude Advisory Group L.L.C. 13F CIK 1928999 · Registered investment adviser · Sep 30, 2026	37,290	0.10%	+100	Sep 30, 2026
32	VANGUARD BALANCED INDEX FUND Fund S000002560 · Registered fund · Jun 30, 2026 VANGUARD VALLEY FORGE FUNDS, not summed	20,833	0.06%	—	Jun 30, 2026	VANGUARD VALLEY FORGE FUNDS, not summed
33	Reid Laurence Insider CIK 1492749 · Sep 9, 2026 Director, issuer-wide, not summed	20,000	0.05%	—	Sep 9, 2026	Director, issuer-wide, not summed
34	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	17,851	0.05%	+858	Jun 30, 2026	carried, not yet filed for the newest quarter
35	Qube Research & Technologies Ltd 13F CIK 1729829 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	16,850	0.04%	+16,850	Jun 30, 2026	carried, not yet filed for the newest quarter
36	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	15,793	0.04%	-305	Jun 30, 2026	carried, not yet filed for the newest quarter
37	TWO SIGMA SECURITIES, LLC 13F CIK 1450144 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	15,173	0.04%	+15,173	Jun 30, 2026	carried, not yet filed for the newest quarter
38	Vanguard Global Advisers, LLC 13F CIK 1811242 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	13,392	0.04%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
39	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	12,797	0.03%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
40	Peak Planning Group, LLC 13F CIK 2097384 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	12,500	0.03%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
41	1290 VT Micro Cap Portfolio Fund S000044688 · Registered fund · Jun 30, 2026 EQ Advisors Trust, not summed	6,882	0.02%	+1,684	Jun 30, 2026	EQ Advisors Trust, not summed
42	MEEDER ASSET MANAGEMENT INC 13F CIK 809443 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	5,496	0.01%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
42.1	Spectrum Fund Fund S000036920 · Registered fund · Jun 30, 2026 Meeder Funds, not summed	5,496	0.01%	0	Jun 30, 2026	Meeder Funds, not summed
43	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	5,302	0.01%	-22,264	Jun 30, 2026	carried, not yet filed for the newest quarter
44	Tower Research Capital LLC (TRC) 13F CIK 1533421 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	5,300	0.01%	+5,258	Jun 30, 2026	carried, not yet filed for the newest quarter
45	US BANCORP \DE\ 13F CIK 36104 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	4,500	0.01%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
46	Blackstone Alternative Multi-Strategy Fund Fund S000045538 · Registered fund · Jun 30, 2026 Blackstone Alternative Investment Funds, not summed	2,600	0.01%	+100	Jun 30, 2026	Blackstone Alternative Investment Funds, not summed
47	OSAIC HOLDINGS, INC. 13F CIK 1677044 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,891	0.01%	-1,000	Jun 30, 2026	carried, not yet filed for the newest quarter
48	JPMORGAN CHASE & CO 13F CIK 19617 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	1,596	0.00%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
49	FMR LLC 13F CIK 315066 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	588	0.00%	-4,130	Jun 30, 2026	carried, not yet filed for the newest quarter
49.1	Fidelity Extended Market Index Fund Fund S000006021 · Registered fund · May 31, 2026 Fidelity Concord Street Trust, not summed	189,092	0.50%	+37,401	May 31, 2026	Fidelity Concord Street Trust, not summed
49.2	Fidelity Total Market Index Fund Fund S000006026 · Registered fund · May 31, 2026 Fidelity Concord Street Trust, not summed	47,211	0.13%	0	May 31, 2026	Fidelity Concord Street Trust, not summed
49.3	Fidelity Series Total Market Index Fund Fund S000065248 · Registered fund · May 31, 2026 Fidelity Concord Street Trust, not summed	36,088	0.10%	0	May 31, 2026	Fidelity Concord Street Trust, not summed
49.4	Fidelity Nasdaq Composite Index Fund Fund S000055366 · Registered fund · May 31, 2026 Fidelity Concord Street Trust, not summed	21,951	0.06%	0	May 31, 2026	Fidelity Concord Street Trust, not summed
50	Allworth Financial LP 13F CIK 1555170 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	500	0.00%	0	Jun 30, 2026	carried, not yet filed for the newest quarter

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 55 holders

Create a free account to page through every holder, filter by source and group by ultimate parent.

Key facts CIK 1785279 CUSIP 59102M104 13F (30d) 2 filings 2 filers Visit website Investor relations