DOSSIER · 13F Holders · Q3 2026Basic Materials · Mining & Quarrying of Nonmetallic Minerals (No Fuels)
MLM
MARTIN MARIETTA MATLS INC
1,105 institutions still hold MARTIN MARIETTA MATLS INC as of Q3 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.
CUSIP 573284106·Mining & Quarrying of Nonmetallic Minerals (No Fuels)·1,105 13F holders·last filed Sep 30, 2026
AI Holders Summary · Q3 2026
1,105 institutions reported MLM in Q3 2026. BlackRock, Inc. leads at 11.7% of the visible book.
Top holders
Sorted by position value. Source: SEC EDGAR 13F-HR filings.
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