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Martin Marietta Materials Inc

MLM
Exchange
NYSE
Industry
Mining & Quarrying of Nonmetallic Minerals (No Fuels)
SEC CIK
0000916076

No open-market purchases or sales by Martin Marietta Materials Inc insiders were filed in the last 90 days; 1,079 institutions reported holding it in 13F filings for Q2 2026, worth $34.2B in total; 4 superinvestors hold it, including TCI Fund Management and Gardner Russo & Quinn.

13F holders, Q2 2026

Institutional positions in Martin Marietta Materials Inc as of Jun 30, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
1,079
+13 vs. Q1 2026
Shares held
59.3M
+826.6K (+1.4%) vs. Q1 2026
Total value
$34.2B
−$182.7M (−0.5%) vs. Q1 2026
New holders
110
364 more added
Sold out
97
395 more reduced

11 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q1 2026: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting MLM on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ2 2026: 1,079 institutions
Q1 2021: 692 institutionsQ2 2021: 696 institutionsQ3 2021: 700 institutionsQ4 2021: 775 institutionsQ1 2022: 763 institutionsQ2 2022: 728 institutionsQ3 2022: 736 institutionsQ4 2022: 768 institutionsQ1 2023: 746 institutionsQ2 2023: 804 institutionsQ3 2023: 815 institutionsQ4 2023: 889 institutionsQ1 2024: 957 institutionsQ2 2024: 940 institutionsQ3 2024: 948 institutionsQ4 2024: 992 institutionsQ1 2025: 953 institutionsQ2 2025: 999 institutionsQ3 2025: 1,053 institutionsQ4 2025: 1,118 institutionsQ1 2026: 1,077 institutionsQ2 2026: 1,079 institutions
Value heldQ2 2026: $34.2B
Q1 2021: $19.5BQ2 2021: $20.3BQ3 2021: $19.7BQ4 2021: $25.7BQ1 2022: $22.8BQ2 2022: $17.5BQ3 2022: $18.9BQ4 2022: $19.7BQ1 2023: $21.3BQ2 2023: $27.5BQ3 2023: $24.2BQ4 2023: $30.7BQ1 2024: $38.7BQ2 2024: $33.4BQ3 2024: $33.8BQ4 2024: $30.5BQ1 2025: $28.5BQ2 2025: $32.9BQ3 2025: $38.5BQ4 2025: $37.7BQ1 2026: $34.4BQ2 2026: $34.2B
Institutions holding MLM and their total value by quarter
QuarterHoldersValue
Q2 20261,079$34.2B
Q1 20261,077$34.4B
Q4 20251,118$37.7B
Q3 20251,053$38.5B
Q2 2025999$32.9B
Q1 2025953$28.5B
Q4 2024992$30.5B
Q3 2024948$33.8B
Q2 2024940$33.4B
Q1 2024957$38.7B
Q4 2023889$30.7B
Q3 2023815$24.2B
Q2 2023804$27.5B
Q1 2023746$21.3B
Q4 2022768$19.7B
Q3 2022736$18.9B
Q2 2022728$17.5B
Q1 2022763$22.8B
Q4 2021775$25.7B
Q3 2021700$19.7B
Q2 2021696$20.3B
Q1 2021692$19.5B

Institutions, Q2 2026

Shares, value and share of portfolio for each institution holding Martin Marietta Materials Inc; share changes are against Q1 2026.

Institutions holding MLM in Q2 2026
InstitutionSharesValue% of portfolioChange in sharesAction
Clear Street Markets LLC14$8.07K0.00%+4+40.0%Added
HHM Wealth Advisors, LLC14$8.07K0.00%+11+366.7%Added
Strengthening Families & Communities, LLC14$8.17K0.00%+5+55.6%Added
Icon Advisers Inc15$8.65K0.00%+15New
Avion Wealth17$9.00K0.00%+1+6.3%Added
Kings Path Partners LLC16$9.23K0.00%−2−11.1%Reduced
Boreal Capital Management LLC16$9.23K0.01%00.0%Unchanged
Rossby Financial, LCC16$9.23K0.00%+2+14.3%Added
Bruce G. Allen Investments, LLC17$9.80K0.01%00.0%Unchanged
Covestor Ltd17$10.0K0.01%00.0%Unchanged
Leonteq Securities AG18$10.4K0.00%+18New
Fedenia Advisers LLC19$11.0K0.00%+19New
Private Wealth Management Group, LLC19$11.0K0.00%−4−17.4%Reduced
UMA Financial Services, Inc.19$11.0K0.00%+13+216.7%Added
AdvisorNet Financial, Inc20$11.5K0.00%−3−13.0%Reduced
Chelsea Counsel Co20$11.5K0.00%00.0%Unchanged
Sittner & Nelson, LLC20$11.5K0.00%00.0%Unchanged
Armstrong Advisory Group, Inc20$11.5K0.00%00.0%Unchanged
Wilkerson Advisory Group LLC20$11.5K0.00%+4+25.0%Added
Orion Capital Management LLC20$11.6K0.00%00.0%Unchanged
Kemnay Advisory Services Inc.21$12.1K0.00%−2−8.7%Reduced
Delta Asset Management LLC21$12.1K0.00%00.0%Unchanged
Steigerwald, Gordon & Koch Inc.22$12.7K0.00%00.0%Unchanged
Financial Network Wealth Advisors LLC22$12.7K0.01%00.0%Unchanged
Cornerstone Financial Management LLC22$12.7K0.01%+7+46.7%Added
McGuire Capital Advisors Inc22$12.7K0.01%+9+69.2%Added
Trust Co of Vermont23$13.3K0.00%+23New
SBI Securities Co., Ltd.24$13.8K0.00%−10−29.4%Reduced
Miller Global Investments, LLC24$13.8K0.01%00.0%Unchanged
JPL Wealth Management, LLC24$13.8K0.00%−3−11.1%Reduced
Action Point Financial Planning, LLC26$14.4K0.00%+26New
Gables Capital Management Inc.25$14.4K0.01%00.0%Unchanged
Solstein Capital, LLC26$15.0K0.01%00.0%Unchanged
Virginia Estate & Retirement Planning Advisors Inc.26$15.0K0.02%00.0%Unchanged
Marshall Investment Management, LLC26$15.0K0.01%+26New
Burkett Financial Services, LLC27$15.6K0.00%+27New
Prestige Wealth Management Group LLC28$16.1K0.00%+1+3.7%Added
Hollencrest Capital Management29$16.7K0.00%00.0%Unchanged
Silver Grove Financial Group, Inc.29$16.7K0.01%+29New
Salomon & Ludwin, LLC29$16.8K0.00%00.0%Unchanged
Clal Insurance Enterprises Holdings Ltd30$17.0K0.00%−4−11.8%Reduced
Richardson Capital Management LLC30$17.3K0.01%−18−37.5%Reduced
Sachetta, LLC31$17.9K0.01%+7+29.2%Added
CNB Bank33$19.0K0.01%00.0%Unchanged
E Fund Management (Hong Kong) Co., Ltd.34$19.6K0.01%+33+3,300.0%Added
SHP Wealth Management36$20.9K0.00%+12+50.0%Added
Quarry LP37$21.3K0.00%+7+23.3%Added
Commonwealth Retirement Investments LLC39$22.5K0.01%+39New
Oakworth Capital, Inc.40$23.1K0.00%00.0%Unchanged
Evolution Wealth Management Inc.40$23.1K0.01%00.0%Unchanged
Kerr Financial Planning Corp41$23.2K0.03%00.0%Unchanged
Westside Investment Management, Inc.41$23.6K0.00%00.0%Unchanged
Atlantic Edge Private Wealth Management, LLC41$23.6K0.00%+16+64.0%Added
Essential Partners LLC42$24.2K0.01%−4−8.7%Reduced
Cornerstone Planning Group LLC44$24.3K0.00%−19−30.2%Reduced
Farmers & Merchants Investments Inc43$24.8K0.00%00.0%Unchanged
Park Place Capital Corp44$25.4K0.00%00.0%Unchanged
Retirement Wealth Solutions LLC45$26.2K0.01%−1−2.2%Reduced
South State Corp.46$26.5K0.00%+1+2.2%Added
CoreCap Advisors, LLC47$27.1K0.00%+37+370.0%Added
AXS Investments LLC48$27.7K0.01%−7−12.7%Reduced
Archer Investment Corp48$28.0K0.00%+24+100.0%Added
Halbert Hargrove Global Advisors, LLC51$29.2K0.00%+51New
Atwood & Palmer Inc51$29.4K0.00%00.0%Unchanged
International Assets Investment Management, LLC52$30.1K0.00%−29−35.8%Reduced
JFS Wealth Advisors, LLC53$30.6K0.00%00.0%Unchanged
Institute for Wealth Management, LLC.54$31.1K0.00%+54New
Meeder Asset Management Inc59$34.0K0.00%+12+25.5%Added
Peterson Wealth Management62$35.5K0.02%00.0%Unchanged
Quent Capital, LLC62$35.8K0.00%+26+72.2%Added
1015 Capital Partners, LLC66$38.1K0.03%−17−20.5%Reduced
EFG International AG67$38.6K0.00%−59−46.8%Reduced
Osterweis Capital Management Inc68$39.2K0.00%00.0%Unchanged
Atlantic Trust, LLC71$40.9K0.01%+26+57.8%Added
SJS Investment Consulting Inc.72$41.5K0.00%00.0%Unchanged
Owl Creek Wealth Partners LLC72$41.5K0.01%00.0%Unchanged
Johnson Financial Group, Inc.73$42.1K0.00%−75−50.7%Reduced
Beacon Investment Advisory Services, Inc.74$42.7K0.00%+6+8.8%Added
Towarzystwo Funduszy Inwestycyjnych Pzu SA75$43.3K0.01%00.0%Unchanged
Zions Bancorporation, National Association76$43.8K0.00%+22+40.7%Added
MV Capital Management, Inc.76$43.8K0.00%−1−1.3%Reduced
Raffa Wealth Management, LLC78$45.0K0.01%+3+4.0%Added
Bryn Mawr Trust Co79$45.6K0.00%+41+107.9%Added
Harel Insurance Investments & Financial Services Ltd.80$46.0K0.00%+7+9.6%Added
Estabrook Capital Management82$47.3K0.01%00.0%Unchanged
Index Technologies Group LLC82$47.3K0.04%+82New
Brown, Lisle/Cummings, Inc.82$47.5K0.01%+5+6.5%Added
Midwest Capital Advisors, LLC82$47.5K0.02%00.0%Unchanged
Pin Oak Investment Advisors Inc84$48.0K0.03%00.0%Unchanged
Prosperity Bancshares Inc84$48.4K0.03%−8−8.7%Reduced
IMA Wealth, Inc.85$49.0K0.00%00.0%Unchanged
Basecamp Wealth Advisors LLC86$49.6K0.01%−1−1.1%Reduced
Deseret Mutual Benefit Administrators86$49.6K0.02%00.0%Unchanged
Roxbury Financial LLC92$52.9K0.04%−40−30.3%Reduced
RMG Wealth Management LLC98$53.3K0.01%−8−7.5%Reduced
Rothschild Investment LLC93$53.8K0.00%−7−7.0%Reduced
Pension & Wealth Management Advisors, Inc.96$55.9K0.02%−18−15.8%Reduced
Bogart Wealth, LLC99$57.1K0.00%+1+1.0%Added
Valley National Advisers Inc100$57.7K0.01%−39−28.1%Reduced
Concord Wealth Partners100$57.7K0.01%+100New