CME GROUP INC

CME Group Inc's institutional 13F footprint as of Q2 2026 is extremely concentrated: six institutions reported $3.67M, with MassMutual Private Wealth & Trust alone accounting for 96% of that base at $3.53M. During the quarter, MassMutual reduced its position by 342 shares — a 2.1% cut — and recognized a $1.29M decline in reported value, reflecting both selling and stock-price movement. Versant Capital Management also reduced, cutting 314 shares and $137K in value. Only Cedar Mountain Advisors and Eastern Bank added, with Eastern initiating a token new position of $2.7K. The net institutional flow for CME was approximately 650 shares of selling, concentrated in the dominant holder. The absence of new entrants at meaningful size and the presence of two reductions — including from a 96%-weight holder — makes the institutional signal for CME cautiously negative in this filing.