DOSSIER · 13F Holders · —
MRBIX
MFS TOTAL RETURN BOND I
0 institutions still hold MFS TOTAL RETURN BOND I as of —. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.
CUSIP 55272P778·0 13F holders
AI Holders Summary · —
0 institutions reported MRBIX in —. Top-holder concentration data is loading.
Historical Security — No Current Institutional Holders
MFS TOTAL RETURN BOND I appears only in historical 13F filings. No institutions currently hold this position.
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