As of Q2 2026, 4 SEC-registered investment managers reported holding MFSB (MFS ACTIVE CORE PLUS BOND) in their latest 13F filings, with a combined reported value of $5.28M across 211.05K shares. That is +135.4% by share count (+121.39K shares) versus the previous quarter, while reported value moved +136.7%. Ownership is concentrated: the five largest holders account for 100.0% of reported value and the top ten for 100.0%.
Compared with the prior quarter, 2 opened new positions, 2 trimmed. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.
All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.