MLM
Martin Marietta (MLM)
NYSE
$502.65-$4.52 (-0.89%)
Price as of Oct 23, 2026 8:00 PM EDT
  • $36.8B
    Market Cap
  • -17.90%
    1-Year Change
  • Building Materials
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
VANGUARD GROUP INC
12.28%
7.4M
-69,061 (-0.94%)
Dec 31, 2025
BLACKROCK, INC.
7.81%
4.7M
+6,689 (+0.14%)
Jun 30, 2026
BLACKROCK FUNDING, INC. /DE
7.09%
4.3M
+203,634 (+4.78%)
Dec 31, 2024
BLACKROCK INC.
6.89%
4.1M
+45,477 (+1.10%)
Jun 30, 2024
VANGUARD CAPITAL MANAGEMENT LLC
6.54%
3.9M
+12,322 (+0.31%)
Jun 30, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
5.32%
3.2M
+36,951 (+1.16%)
Jun 30, 2026
N/A
5.32%
3.2M
+36,951 (+1.16%)
Jun 30, 2026

Current Ownership Distribution

  • Mutual Funds3.0B (72.15%)
  • Institutions1.2B (27.45%)
  • Insiders16.6M (0.40%)
  • Other0 (0.00%)

Insider Transactions

  • 0.40% (16.6M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 0
    Number of InsiderSelling (last 12 months)
  • $0.00
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
Pike Thomas
Award
Aug 31, 2026
$34,234.20
66
$518.70
5,029
LYONS MARTIN J
Award
Aug 31, 2026
$35,271.60
68
$518.70
442
WAJSGRAS DAVID C
Award
Aug 31, 2026
$40,458.60
78
$518.70
5,106
Niemann Philipp
Award
Aug 21, 2026
$0.00
337
$0.00
337
Petro Michael J
SVP and CFO
In Kind
Aug 03, 2026
$199,555.36
368
$542.27
14,991
McCunniff Donald A.
EVP and CHRO
Award
Mar 01, 2026
$0.00
2,960
$0.00
7,518
Schoen George Frederick
EVP, GC and Corp. Secretary
Award
Mar 01, 2026
$0.00
23,673
$0.00
23,673
Petro Michael J
SVP and CFO
Award
Mar 01, 2026
$0.00
2,960
$0.00
15,359
KORALESKI JOHN J
Award
Feb 27, 2026
$46,683.33
69
$676.57
8,822
WAJSGRAS DAVID C
Award
Feb 27, 2026
$37,887.92
56
$676.57
4,646
Nye C Howard
Chairman, Pres & CEO
In Kind
Feb 24, 2026
$850,853.85
1,221
$696.85
170,119
Flynn Jason Paul
SVP and CIO
In Kind
Feb 24, 2026
$20,905.50
30
$696.85
5,494
Nye C Howard
Chairman, Pres & CEO
In Kind
Feb 23, 2026
$1.2M
1,805
$683.60
171,340
Flynn Jason Paul
SVP and CIO
In Kind
Feb 23, 2026
$120,997.20
177
$683.60
5,524
Nye C Howard
Chairman, Pres & CEO
Award
Feb 20, 2026
$1.2M
2,216
$548.75
166,740
Petro Michael J
SVP and CFO
Award
Feb 20, 2026
$0.00
931
$0.00
12,704
Nye C Howard
Chairman, Pres & CEO
Award
Feb 20, 2026
$0.00
6,405
$0.00
173,145
Flynn Jason Paul
SVP and CIO
Award
Feb 20, 2026
$324,860.00
592
$548.75
5,106
Flynn Jason Paul
SVP and CIO
Award
Feb 20, 2026
$0.00
595
$0.00
5,701
Flynn Jason Paul
SVP and CIO
Award
Feb 17, 2026
$0.00
222
$0.00
4,621
Nye C Howard
Chairman, Pres & CEO
Award
Feb 17, 2026
$0.00
22,365
$0.00
174,241
Cardin Robert J
SVP, Controller & CAO
Award
Feb 17, 2026
$0.00
1,869
$0.00
12,935
Nye C Howard
Chairman, Pres & CEO
In Kind
Feb 17, 2026
$6.5M
9,717
$666.53
164,524
Flynn Jason Paul
SVP and CIO
In Kind
Feb 17, 2026
$71,318.71
107
$666.53
4,514
Petro Michael J
SVP and CFO
Award
Feb 17, 2026
$0.00
1,724
$0.00
12,531
Cardin Robert J
SVP, Controller & CAO
In Kind
Feb 17, 2026
$547,887.66
822
$666.53
12,113
Petro Michael J
SVP and CFO
In Kind
Feb 17, 2026
$505,229.74
758
$666.53
11,773
McCunniff Donald A.
EVP and CHRO
In Kind
Dec 16, 2025
$31,474.50
50
$629.49
3,473
Nye C Howard
Chairman, Pres & CEO
In Kind
Dec 16, 2025
$187,588.02
298
$629.49
151,876
Cardin Robert J
SVP, Controller & CAO
In Kind
Dec 16, 2025
$20,143.68
32
$629.49
11,066