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MGX

Metagenomi Therapeutics, Inc.

Company with tickers: MGX

CIK
1785279
CUSIP
59102M104
Shares Outstanding
37,646,858
13F Activity (30d)
48 filings 47 filers
Holders: 48
Total Value: $8,661,771
Total Shares: 6,464,026

Institutional Ownership Trend

9 quarters

Holder Concentration

Across 48 13F filers · Δ vs Dec 31, 2025
Top Holder
16.4%
Mar 2024 → Mar 2026 · range 12.6% – 18.9%
−2.4 pts
Top 5
52.4%
Mar 2024 → Mar 2026 · range 44.8% – 52.4%
+2.6 pts
Top 10
77.6%
Mar 2024 → Mar 2026 · range 66.3% – 77.6%
+3.7 pts
HHI
779
Mar 2024 → Mar 2026 · range 585 – 779
Broadly held +16

Quarterly Activity

vs Dec 31, 2025
New
5
Increased
9
Decreased
15
Sold Out
13
Unchanged
19
Holder count: -8
Institutional value: -21.0%
Shares held: -4.4%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Large RENAISSANCE TECHNOLOGIES LLC +159,500 787,900
Mega WELLS FARGO & COMPANY/MN +83,728 202,138
Mega TWO SIGMA INVESTMENTS, LP +55,379 496,767
Mega GEODE CAPITAL MANAGEMENT, LLC +52,292 358,200
Large Man Group plc +22,139 78,636

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mega JANE STREET GROUP, LLC −282,419 151,440
Mega CITADEL ADVISORS LLC −161,179 16,993
Mega MILLENNIUM MANAGEMENT LLC −65,081 170,104
Large MARSHALL WACE, LLP −51,615 27,521
Mega MORGAN STANLEY −32,116 27,566

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 1,057,944 $1,417,644
Large JACOBS LEVY EQUITY MANAGEMENT, INC 382,153 $512,085
Mega VANGUARD FIDUCIARY TRUST CO 170,174 $228,033
Mega Vanguard Global Advisers, LLC 13,392 $17,945
Small Caitong International Asset Management Co., Ltd 4 $5

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 1,270,246 $2,057,797
Large TWO SIGMA ADVISERS, LP 201,300 $326,106
Large ACADIAN ASSET MANAGEMENT LLC 64,875 $105,097
Mid Quadrature Capital Ltd 33,917 $54,945
Large PANAGORA ASSET MANAGEMENT INC 32,580 $52,779
Filter: New 5 Increased 9 Reduced 15 Sold out 13 Unchanged 19
48 of 48 shown
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega VANGUARD CAPITAL MANAGEMENT LLC $1,417,644 16.37% 1,057,944
Large RENAISSANCE TECHNOLOGIES LLC $1,055,786 12.19% 787,900
Small Catalio Capital Management, LP $708,850 8.18% 528,993
Small Peapod Lane Capital LLC $692,459 7.99% 516,761
Mega TWO SIGMA INVESTMENTS, LP $665,667 7.69% 496,767
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC $530,372 6.12% 395,800
Large JACOBS LEVY EQUITY MANAGEMENT, INC $512,085 5.91% 382,153
Mega GEODE CAPITAL MANAGEMENT, LLC $479,987 5.54% 358,200
Micro PURA VIDA INVESTMENTS, LLC $354,283 4.09% 264,391
Mega BlackRock, Inc. $308,378 3.56% 230,134
Mega WELLS FARGO & COMPANY/MN $270,864 3.13% 202,138
Mega VANGUARD FIDUCIARY TRUST CO Bank $228,033 2.63% 170,174
Mega MILLENNIUM MANAGEMENT LLC $227,939 2.63% 170,104
Mega JANE STREET GROUP, LLC $202,929 2.34% 151,440
Mega STATE STREET CORP $161,372 1.86% 120,427
Micro Resolute Advisors LLC $120,524 1.39% 89,944
Large Man Group plc $105,372 1.22% 78,636
Mega NORTHERN TRUST CORP Bank $100,730 1.16% 75,172
Mid RBF Capital, LLC $85,788 0.99% 64,021
Mid BBR PARTNERS, LLC $71,560 0.83% 53,403
Mid XTX Topco Ltd $54,379 0.63% 40,582
Small Fortitude Advisory Group L.L.C. $49,834 0.58% 37,190
Mega MORGAN STANLEY $36,938 0.43% 27,566
Large MARSHALL WACE, LLP $36,878 0.43% 27,521
Mega CITADEL ADVISORS LLC $22,770 0.26% 16,993
Mega LPL Financial LLC $22,557 0.26% 16,834
Mega UBS Group AG $21,571 0.25% 16,098
Mega Vanguard Global Advisers, LLC $17,945 0.21% 13,392
Mega DIMENSIONAL FUND ADVISORS LP $17,147 0.20% 12,797
Small Peak Planning Group, LLC $16,750 0.19% 12,500
Large Point72 Asset Management, L.P. $15,712 0.18% 11,726
Large HRT FINANCIAL LP $14,303 0.17% 10,674
Mid MEEDER ASSET MANAGEMENT INC $7,364 0.09% 5,496
Mega FMR LLC $6,322 0.07% 4,718
Large US BANCORP \DE\ Bank $6,030 0.07% 4,500
Large Russell Investments Group, Ltd. $5,599 0.06% 4,179
Large OSAIC HOLDINGS, INC. $3,873 0.04% 2,891
Mega JPMORGAN CHASE & CO $2,137 0.02% 1,596
Large NISA INVESTMENT ADVISORS, LLC $684 0.01% 511
Mid Allworth Financial LP $670 0.01% 500
Large JONES FINANCIAL COMPANIES LLLP $670 0.01% 500
Mega ROYAL BANK OF CANADA Bank $420 0.00% 314
Mega BNP PARIBAS ARBITRAGE, SA $411 0.00% 307
Mid Larson Financial Group LLC $67 0.00% 50
Mid Tower Research Capital LLC (TRC) $56 0.00% 42
Large CWM, LLC $33 0.00% 25
Mid Optiver Holding B.V. $24 0.00% 18
Small Caitong International Asset Management Co., Ltd $5 0.00% 4

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