MLM Institutional Ownership
MARTIN MARIETTA MATERIALS INC
Latest close $548.57 as of Aug 7, 2026
MLM institutional ownership at a glance
Follow MARTIN MARIETTA MATERIALS INC institutional ownership through recent Schedule 13G and 13D filings. Compare reported shares, ownership percentages, filing dates, and changes in beneficial ownership over time.
Latest filing: Vanguard Capital Management filed Initial Schedule 13G on Apr 30, 2026, reporting 4.5M shares and 7.47% beneficial ownership.
How to read Schedule 13 ownership changes
Schedule 13G/13D reports beneficial ownership at an observation date. “Accumulation” or “reduction” is inferred from changes in reported shares when available; it is not a list of individual trades or exact execution prices.
Form 13F rows are quarter-end holding context only and do not establish an exact entry date.
For more context, see how to read a Schedule 13G, filing date vs event date, or Schedule 13G vs Schedule 13D.
Institutional Research
This gauge summarizes recent agreement across tracked institutional activity.
1 reducing across 1 comparable institution.
The overall consensus is public. Detailed holder comparisons, breadth history, ownership charts, and filing-specific signal analysis remain part of Investor and Pro research.
Price context
52-week position is market context and does not change the institutional consensus score.
Tracked institutions
Public holder names and filing freshness. Detailed institution-by-institution analysis is locked.
Beneficial ownership filing history
Showing 3 of 4 filing(s) · 1 older require more history access| Holder | Observed / filed | Reported change | Shares | Ownership | Observation | Filing | Latest |
|---|---|---|---|---|---|---|---|
| Vanguard Capital Management CIK0002100119 | Mar 31, 2026 observed Apr 30, 2026 filed · 30d Initial Schedule 13G | Initial Schedule 13G | 4.5M | 7.47% | $588.68 | $619.07 | $548.57 |
| T. Rowe Price Investment Management CIK0001897612 | Dec 31, 2024 observed Feb 14, 2025 filed · 45d Schedule 13G amendment | Reported reduction | 1.6M -1.9M | 12.00% +6.30 pts | $516.50 | $527.38 | $548.57 |
| T. Rowe Price Investment Management CIK0001897612 | Sep 30, 2024 observed Nov 14, 2024 filed · 45d Initial Schedule 13G | Initial Schedule 13G | 3.5M | 5.70% | $538.25 | $587.96 | $548.57 |
Related research
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