Macrogenics MGNX Institutional Ownership

Updated Oct 11, 2026

Macrogenics Inc (NASDAQ:MGNX) had 123 institutional holders reporting a position on Form 13F for the quarter ended June 30, 2026.

• Collectively, these holders controlled 76.65% of Macrogenics' outstanding shares in Q2 2026, up from 67.92% in Q1 2026.
• Total holdings of MGNX shares rose 13.01% from Q1 2026, and the holder count rose 11.82% from Q2 2025.
• Of these 123 holders, 73 added to their positions, 29 reduced their stakes and 21 left their positions unchanged.
• The aggregate institutional position in Macrogenics was 48.78Mn shares at the end of Q2 2026, up 5.61Mn from the prior quarter and up 1.05Mn from a year earlier.
• Armistice Capital, LLC was the top holder of Macrogenics as of June 30, 2026, with 5.01Mn shares, or 7.87% of shares outstanding.
• The biggest increases in MGNX positions during Q2 2026 came from BlackRock, Inc. (+3.52Mn shares), Mackenzie Financial Corp (+1.05Mn shares), Geode Capital Management, LLC (+879.23K shares), Affinity Asset Advisors, LLC (+716.61K shares) and Vanguard Portfolio Management LLC (+611.46K shares).
• Holders that trimmed the most shares of Macrogenics in Q2 2026 while keeping a position were Armistice Capital, LLC (-1.01Mn shares), Citadel Advisors LLC (-602.78K shares), Jane Street Group, LLC (-524.65K shares), Millennium Management LLC (-420.06K shares) and Marshall Wace, LLP (-409.31K shares).
• According to Business Quant data, the leading holders of MGNX for Q2 2026 were Armistice Capital, LLC (5.01Mn shares), BlackRock, Inc. (4.68Mn shares), Vanguard Capital Management LLC (2.66Mn shares), Renaissance Technologies LLC (2.63Mn shares), Acadian Asset Management LLC (2.54Mn shares), Bank of America Corp (2.49Mn shares), Two Sigma Investments, LP (2.47Mn shares), Millennium Management LLC (2.37Mn shares), Wasatch Advisors LP (2.02Mn shares) and Ra Capital Management, L.P. (1.86Mn shares).