MARTIN MARIETTA MATERIALS (MLM) Institutional Ownership and Insiders Activity
MARTIN MARIETTA MATERIALS (MLM) is widely held by institutional investors, with 1057 firms reporting positions valued at approximately $33.45B based on SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is the largest disclosed holder, reporting approximately $2.71B in MLM holdings in its latest filing.
Recent insider activity includes 6 tracked Form 4 transactions over the last three months, reflecting ongoing executive and director trading activity.
Institutional Holders
1,057
Total Reported Value
$33.45B
Largest Holder
Blackrock, Inc.
Largest Position
$2.71B
Insider Transactions (90d)
6
Latest Filing Quarter
Q2 2026
New Institutional Positions
109
Funds Exiting Positions
129
Top Institutional Owners
View allInvestorReported Balance
- Blackrock, Inc.$2.71B
- Vanguard Capital Management Llc$2.27B
- Vanguard Portfolio Management Llc$1.84B
- State Street Corp$1.82B
- Bank Of America Corp$1.41B
MLM News
All news- Steginsky Capital Llc Activity Analysis: Q2 2026 Portfolio Changes
Jul 11, 2026 · valut.ai
Related MLM Institutional Insights:
- MLM 13F Institutional Holders
- MLM Superinvestors
- MLM Institutional Ownership Changes
- Basic Materials Sector Institutional Ownership
- Basic Materials Sector Portfolio Overlap
- Institutional Portfolio Overlap & Shared Holdings
- Most Bought Basic Materials Stocks By Institutional Investors
- Most Sold Basic Materials Stocks By Institutional Investors
- MLM Insider Trading & SEC Form 4 Activity
- MLM Articles
- Top Institutional Investor Stock Rankings