Martin Marietta Materials (MLM) Ownership & Trading Activity
Institutional holders, insider transactions, and congressional trades for MLM. 13F holdings as of 2026-06-30.
In 13F filings for the quarter ended June 30, 2026, 1,058 institutions reported holding MLM, with 58.9 million shares worth $33.9 billion in aggregate.
Top Institutional Holders
| Institution | Shares | Value | Change |
|---|---|---|---|
| Vanguard | 7,740,764 | $4.5B | INCREASED |
| BlackRock | 4,692,446 | $2.7B | INCREASED |
| State Street | 3,159,639 | $1.8B | INCREASED |
| Bank of America | 2,446,762 | $1.4B | INCREASED |
| T. Rowe Price | 2,240,645 | $1.3B | DECREASED |
Recent Insider Trades
| Insider | Type | Shares | Value | Date |
|---|---|---|---|---|
| Michael J Petro (SVP and CFO) | AWARD | 9,331 | 2026-09-01 | |
| David C Wajsgras (Director) | AWARD | 78 | $40K | 2026-08-31 |
| Thomas Pike (Director) | AWARD | 66 | $34K | 2026-08-31 |
| Martin J Lyons (Director) | AWARD | 68 | $35K | 2026-08-31 |
| Philipp Niemann (Director) | AWARD | 337 | 2026-08-21 |
Recent Congressional Trades
| Member | Type | Amount | Date |
|---|---|---|---|
| Ro Khanna (Democrat) | PURCHASE | $1,001 - $15,000 | 2026-09-25 |
| Ro Khanna (Democrat) | PURCHASE | $1,001 - $15,000 | 2026-09-11 |
| April McClain Delaney (Democrat) | SALE | $250,001 - $500,000 | 2026-08-25 |
Full institutional holdings, insider history, and congressional trades for Martin Marietta Materials on SentiSense.