Metagenomi, Inc. (MGX) Institutional Ownership

Ownership Summary

Metagenomi, Inc. (NASDAQ:MGX) has 56 institutional investors with active 13F positions as of December 2025.

• Their combined ownership stood at 18.3% of outstanding shares in December 2025, up from 16.2% in September 2025.
• Their total shares held in MGX increased 28.72% from the prior quarter, while the number of investors in Metagenomi decreased 25.33% year over year.
• Of these 56 holders, 25 added to their stakes in Metagenomi, 17 trimmed positions, and 14 made no changes.
• The aggregate institutional position in Metagenomi amounted to 6.83Mn shares as of December 2025, up by 1.52Mn shares quarter on quarter, and down 4.76Mn shares year over year.
• VANGUARD GROUP INC leads ownership in MGX with 1.27Mn shares as of December 31, 2025, equal to 3.4% of outstanding shares.
• Leading buyers of Metagenomi shares for the quarter ending December 2025 were RENAISSANCE TECHNOLOGIES LLC (461.4K), JANE STREET GROUP, LLC (335.6K), TWO SIGMA INVESTMENTS, LP (233.86K), BRIDGEWAY CAPITAL MANAGEMENT, LLC (200.0K), CITADEL ADVISORS LLC (178.17K).
• The largest sales of MGX for the quarter ending December 2025 came from Morgan Stanley (181.65K), Jpmorgan Chase & Co (123.52K), MILLENNIUM MANAGEMENT LLC (75.51K), Bank Of America Corp /De/ (37.49K), Peapod Lane Capital LLC (16.16K).
• Business Quant data shows the 10 biggest positions in Metagenomi as of December 2025 are held by VANGUARD GROUP INC (1.27Mn), RENAISSANCE TECHNOLOGIES LLC (628.4K), Catalio Capital Management, LP (528.99K), Peapod Lane Capital LLC (497.65K), TWO SIGMA INVESTMENTS, LP (441.39K), JANE STREET GROUP, LLC (433.86K), BRIDGEWAY CAPITAL MANAGEMENT, LLC (395.8K), GEODE CAPITAL MANAGEMENT, LLC (305.91K), PURA VIDA INVESTMENTS, LLC (264.39K), MILLENNIUM MANAGEMENT LLC (235.18K).