DOSSIER · 13F Holders · Q3 2026
MRSIX
MFS SER TR I
2 institutions still hold MFS SER TR I as of Q3 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.
CUSIP 552983470·2 13F holders·last filed Sep 30, 2026
AI Holders Summary · Q3 2026
2 institutions reported MRSIX in Q3 2026. FULTON BANK, N.A. leads at 99.9% of the visible book.
Top holders
Sorted by position value. Source: SEC EDGAR 13F-HR filings.