Mustang Bio, Inc. (MBIO) Institutional Ownership

Ownership Summary

Mustang Bio, Inc. (NASDAQ:MBIO) showed up in the 13F filings of 24 institutional investors as of December 2025.

• These investors held 8.8% of outstanding shares in December 2025, up from 4.2% in September 2025.
• They increased total shares held in MBIO by 121.25% quarter over quarter, and investors in Mustang Bio decreased 22.58% from a year ago.
• During the quarter, 12 of these 24 funds increased positions in MBIO, 5 reduced exposure, and 7 held steady.
• Combined, these investors held 551.97K shares in MBIO for December 2025, up by 302.48K shares quarter on quarter, and down 4.13Mn shares year over year.
• Kestra Advisory Services, LLC is the top holder of Mustang Bio as of December 31, 2025, with 111.04K shares representing 1.78% of outstanding stock.
• The most significant purchases of MBIO for the quarter ending December 2025 came from CITADEL ADVISORS LLC (84.76K), DRW Securities, LLC (73.94K), Kestra Advisory Services, LLC (44.93K), TWO SIGMA INVESTMENTS, LP (40.03K), XTX Topco Ltd (24.07K).
• The largest sellers of Mustang Bio for the quarter ending December 2025 were Tower Research Capital LLC (TRC) (396), Morgan Stanley (150), Bank Of America Corp /De/ (50), UBS Group AG (4), Jpmorgan Chase & Co (2).
• Business Quant data shows the 10 biggest positions in Mustang Bio as of December 2025 are held by Kestra Advisory Services, LLC (111.04K), CITADEL ADVISORS LLC (84.76K), BlackRock, Inc. (84.74K), DRW Securities, LLC (73.94K), VANGUARD GROUP INC (57.86K), TWO SIGMA INVESTMENTS, LP (40.03K), GEODE CAPITAL MANAGEMENT, LLC (32.29K), XTX Topco Ltd (24.07K), JANE STREET GROUP, LLC (14.13K), CFO4Life Group, LLC (12.96K).