DOSSIER · 13F Holders · Q1 2026
MACMX
BLACKROCK CALIFORNIA MUNI OPPS INSTL
3 institutions still hold BLACKROCK CALIFORNIA MUNI OPPS INSTL as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.
CUSIP 09252Y606·3 13F holders·last filed Mar 31, 2026
AI Holders Summary · Q1 2026
3 institutions reported MACMX in Q1 2026. McIlrath & Eck, LLC leads at 82.7% of the visible book.
Top holders
Sorted by position value. Source: SEC EDGAR 13F-HR filings.