IonQ, Inc. (IONQ) Institutional Ownership

Ownership Summary

IonQ, Inc. (NYSE:IONQ) currently has 603 active institutional owners and shareholders as of today (September 2025), that have filed 13F forms with the Securities Exchange Commission (SEC).

• The collective stake of institutional investors in IonQ moved to 65.0% in September 2025, a shift up from the 54.6% reported for June 2025.
• On a quarter-over-quarter basis, institutional holdings shifted by 33.40%, with a year-over-year an increase of 149.17% in the count of filers.
• During the quarter, 456 institutions bought more IonQ shares, 88 sold shares, and 59 of the 603 total investors held their position steady.
• The aggregate institutional position in IonQ now stands at 177.59Mn shares as of September 2025, after investors increased their holdings (up by 44.46Mn shares quarter on quarter which is up 96.50Mn shares year over year).
• As of September 30, 2025, VANGUARD GROUP INC held IonQ's largest shareholding position with over 29.35Mn shares, representing 10.75% of total outstanding shares.
• Among the most significant buyers of IonQ during September 2025 were MORGAN STANLEY (6.06Mn), VANGUARD GROUP INC (4.59Mn), BlackRock, Inc. (4.23Mn), RENAISSANCE TECHNOLOGIES LLC (4.07Mn), GOLDMAN SACHS GROUP INC (1.94Mn).
• Leading sellers of IonQ stock in September 2025 included Cerberus Capital Management, L.P. (2.31Mn), Tidal Investments LLC (802.69K), Twin Tree Management, LP (547.52K), UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC (345.56K), WESTFIELD CAPITAL MANAGEMENT CO LP (303.96K).
• The top 10 institutional holders of IonQ for the quarter ending September 2025 included VANGUARD GROUP INC (29.35Mn), MORGAN STANLEY (26.34Mn), BlackRock, Inc. (22.48Mn), GEODE CAPITAL MANAGEMENT, LLC (6.62Mn), STATE STREET CORP (6.30Mn), D. E. Shaw & Co., Inc. (5.45Mn), JANE STREET GROUP, LLC (5.38Mn), RENAISSANCE TECHNOLOGIES LLC (5.08Mn), UBS Group AG (4.30Mn), PRICE T ROWE ASSOCIATES INC /MD/ (3.25Mn).