MARTIN MARIETTA MATERIALS INC
MLM · Mining & Quarrying of Nonmetallic Minerals (No Fuels) · 60.0M shares · -0%/yr ↓ buyback · EDGAR filings ↗
Net buyback after stock comp: $100M (gross $150M, SBC $50M)
Reference price $613.32 · est. market cap ~$36.8B — last insider sale, 2025-08-08 (estimated from the dated SEC Form 4 price × shares outstanding — not a live quote)
Grade
A85Dominant, wide-moat aggregates franchise with top-decile margins, strong cash generation and durable pricing power.
Strengths
- Top-decile profitability (net margin 18.5%/91st, operating margin 23%/91st, gross margin 31%/90th) and FCF ($978M/90th)
- Pricing power evident (aggregates +6.9% YoY) in a localized, high-barrier business with rising net income
Risks
- ROE only ~11% (69th pct) given a large equity base, and results carry cyclical construction-demand exposure
- Modest cash balance and reliance on continued infrastructure/nonresidential demand
Notable findings
- Exec changeRecent 8-K item 5.02 8-K ↗
- Customer concentration~25% of revenue from one customer/distributor — This process typically takes years to finalize, and the rules often change signifi of Financial Condition and Results of Operations The Company’s consolidated operating results and certain operatin
- Revenue declineRevenue -11.2% YoY
Quarterly revenue
Last 4 quarters · from SEC filings.
Key metrics
Gross margin
30.7%
Operating margin
23.4%
Net margin
18.5%
Return on equity
11.3%
Return on assets
6.1%
ROIC
7.4%
Revenue growth (QoQ)
-11.2%
Net-income growth
-43.0%
Debt / equity
0.5×
Net debt / EBITDA
2.5×
Interest coverage
6.2×
Current ratio
3.6×
Free cash flow
$978M
EBITDA
$2.1B
Tangible book value
$6.4B
Cash & investments
$67M
Stock comp / revenue
0.7%
Insider transactions · last 18 months
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| 2026-05-29 | Pike Thomas | Grant | 59 | $581.64 |
| 2026-05-29 | LYONS MARTIN J | Grant | 61 | $581.64 |
| 2026-05-29 | WAJSGRAS DAVID C | Grant | 69 | $581.64 |
| 2026-05-14 | PEREZ LAREE E | Grant | 313 | — |
| 2026-05-14 | Mack Mary T | Grant | 313 | — |
| 2026-05-14 | LYONS MARTIN J | Grant | 313 | — |
| 2026-05-14 | Foxx Anthony R | Grant | 313 | — |
| 2026-05-14 | DELLY GAYLA J | Grant | 313 | — |
| 2026-05-14 | WAJSGRAS DAVID C | Grant | 313 | — |
| 2026-05-14 | Ables Dorothy M | Grant | 313 | — |
| 2026-05-14 | SLAGER DONALD W | Grant | 313 | — |
| 2026-05-14 | Pike Thomas | Grant | 313 | — |
| 2026-05-01 | Samborski Christopher William | Grant | 8.1K | — |
| 2026-03-01 | Schoen George Frederick | Grant | 24K | — |
| 2026-03-01 | Petro Michael J | Grant | 3.0K | — |
| 2026-03-01 | Nye C Howard | Grant | 5.9K | — |
| 2026-03-01 | McCunniff Donald A. | Grant | 3.0K | — |
| 2026-02-27 | WAJSGRAS DAVID C | Grant | 56 | $676.57 |
| 2026-02-27 | Pike Thomas | Grant | 47 | $676.57 |
| 2026-02-27 | KORALESKI JOHN J | Grant | 69 | $676.57 |
| 2026-02-24 | Cardin Robert J | Tax withheld | 103 | $696.85 |
| 2026-02-24 | Petro Michael J | Tax withheld | 94 | $696.85 |
| 2026-02-24 | Flynn Jason Paul | Tax withheld | 30 | $696.85 |
| 2026-02-24 | Nye C Howard | Tax withheld | 1.2K | $696.85 |
| 2026-02-23 | Flynn Jason Paul | Tax withheld | 177 | $683.60 |
| 2026-02-23 | Petro Michael J | Tax withheld | 211 | $683.60 |
| 2026-02-23 | Nye C Howard | Tax withheld | 1.8K | $683.60 |
| 2026-02-23 | McCunniff Donald A. | Tax withheld | 192 | $683.60 |
| 2026-02-23 | Cardin Robert J | Tax withheld | 209 | $683.60 |
| 2026-02-20 | Nye C Howard | Grant | 6.4K | — |
| 2026-02-20 | McCunniff Donald A. | Grant | 1.3K | — |
| 2026-02-20 | Flynn Jason Paul | Grant | 592 | $548.75 |
| 2026-02-20 | Petro Michael J | Grant | 931 | — |
| 2026-02-20 | Flynn Jason Paul | Grant | 595 | — |
| 2026-02-20 | Cardin Robert J | Grant | 658 | — |
| 2026-02-20 | Nye C Howard | Grant | 2.2K | $548.75 |
| 2026-02-17 | Cardin Robert J | Tax withheld | 822 | $666.53 |
| 2026-02-17 | Nye C Howard | Grant | 22K | — |
| 2026-02-17 | Petro Michael J | Grant | 1.7K | — |
| 2026-02-17 | Petro Michael J | Tax withheld | 758 | $666.53 |
| 2026-02-17 | Flynn Jason Paul | Grant | 222 | — |
| 2026-02-17 | Flynn Jason Paul | Tax withheld | 107 | $666.53 |
| 2026-02-17 | Nye C Howard | Tax withheld | 9.7K | $666.53 |
| 2026-02-17 | Cardin Robert J | Grant | 1.9K | — |
| 2025-12-16 | BAR ROSELYN R | Tax withheld | 66 | $629.49 |
| 2025-12-16 | McCunniff Donald A. | Tax withheld | 50 | $629.49 |
| 2025-12-16 | Cardin Robert J | Tax withheld | 32 | $629.49 |
| 2025-12-16 | Nye C Howard | Tax withheld | 298 | $629.49 |
| 2025-12-02 | BAR ROSELYN R | Gift | 488 | — |
| 2025-12-01 | Flynn Jason Paul | Tax withheld | 123 | $615.25 |
| 2025-12-01 | BAR ROSELYN R | Tax withheld | 420 | $615.25 |
| 2025-11-28 | KORALESKI JOHN J | Grant | 75 | $623.24 |
| 2025-11-28 | WAJSGRAS DAVID C | Grant | 61 | $623.24 |
| 2025-11-28 | Pike Thomas | Grant | 51 | $623.24 |
| 2025-08-29 | Pike Thomas | Grant | 51 | $616.40 |
| 2025-08-29 | WAJSGRAS DAVID C | Grant | 61 | $616.40 |
| 2025-08-29 | KORALESKI JOHN J | Grant | 76 | $616.40 |
| 2025-08-08 | PEREZ LAREE E | Sell | 1.0K | $613.32 |
| 2025-07-08 | Petro Michael J | Grant | 1.8K | — |
| 2025-05-30 | WAJSGRAS DAVID C | Grant | 69 | $547.55 |
| 2025-05-30 | KORALESKI JOHN J | Grant | 85 | $547.55 |
| 2025-05-30 | Pike Thomas | Grant | 58 | $547.55 |
| 2025-05-15 | COLE SUE W | Grant | 308 | $552.86 |
| 2025-05-15 | Ables Dorothy M | Grant | 308 | $552.86 |
| 2025-05-15 | Foxx Anthony R | Grant | 308 | $552.86 |
| 2025-05-15 | Cardin Robert J | Grant | 2.9K | — |
| 2025-05-15 | WAJSGRAS DAVID C | Grant | 308 | $552.86 |
| 2025-05-15 | SLAGER DONALD W | Grant | 308 | $552.86 |
| 2025-05-15 | Pike Thomas | Grant | 308 | $552.86 |
| 2025-05-15 | PEREZ LAREE E | Grant | 308 | $552.86 |
| 2025-05-15 | Mack Mary T | Grant | 308 | $552.86 |
| 2025-05-15 | KORALESKI JOHN J | Grant | 308 | $552.86 |
| 2025-03-05 | McCunniff Donald A. | Option exercise | 1.3K | $154.58 |
| 2025-03-05 | McCunniff Donald A. | Sell | 1.3K | $475.00 |
| 2025-03-04 | Petro Michael J | Buy | 550 | $454.37 |
| 2025-02-28 | WAJSGRAS DAVID C | Grant | 78 | $483.14 |
| 2025-02-28 | Pike Thomas | Grant | 65 | $483.14 |
| 2025-02-28 | KORALESKI JOHN J | Grant | 96 | $483.14 |
| 2025-02-24 | Nickolas James AJ | Tax withheld | 450 | $490.64 |
| 2025-02-24 | Petro Michael J | Tax withheld | 200 | $490.64 |
| 2025-02-24 | BAR ROSELYN R | Tax withheld | 402 | $490.64 |
| 2025-02-24 | Brooks Oliver W | Tax withheld | 188 | $490.64 |
| 2025-02-24 | Nye C Howard | Tax withheld | 2.0K | $490.64 |
| 2025-02-24 | Cardin Robert J | Tax withheld | 216 | $490.64 |
| 2025-02-21 | KOHN BRADLEY D | Grant | 981 | — |
| 2025-02-21 | Petro Michael J | Grant | 733 | — |
| 2025-02-21 | Nye C Howard | Grant | 2.1K | $391.87 |
| 2025-02-21 | Nye C Howard | Grant | 7.4K | — |
| 2025-02-21 | Nickolas James AJ | Grant | 1.6K | — |
| 2025-02-21 | McCunniff Donald A. | Grant | 1.5K | — |
| 2025-02-21 | Cardin Robert J | Grant | 795 | — |
| 2025-02-21 | Brooks Oliver W | Grant | 744 | — |
| 2025-02-21 | BAR ROSELYN R | Grant | 738 | $391.87 |
| 2025-02-21 | BAR ROSELYN R | Grant | 1.6K | — |
| 2025-02-18 | Petro Michael J | Grant | 2.5K | — |
| 2025-02-18 | Petro Michael J | Tax withheld | 1.2K | $533.99 |
| 2025-02-18 | Nye C Howard | Grant | 24K | — |
| 2025-02-18 | Nye C Howard | Tax withheld | 11K | $533.99 |
| 2025-02-18 | Nickolas James AJ | Grant | 4.3K | — |
| 2025-02-18 | Nickolas James AJ | Tax withheld | 2.1K | $533.99 |
| 2025-02-18 | Cardin Robert J | Grant | 2.2K | — |
| 2025-02-18 | Cardin Robert J | Tax withheld | 1.1K | $533.99 |
| 2025-02-18 | Brooks Oliver W | Grant | 215 | — |
| 2025-02-18 | Brooks Oliver W | Tax withheld | 134 | $533.99 |
| 2025-02-18 | BAR ROSELYN R | Grant | 4.4K | — |
| 2025-02-18 | BAR ROSELYN R | Tax withheld | 2.1K | $533.99 |
All non-derivative Form 4 activity (SEC), newest first.
Notable events (8-K)
| Date | Items | |
|---|---|---|
| 2026-05-14 | Exec/director changeShareholder voteExhibits | filing ↗ |
| 2026-04-30 | ResultsReg FD | filing ↗ |
| 2026-04-27 | Exec/director changeExhibits | filing ↗ |
| 2026-02-23 | Acquisition/dispositionReg FDExhibits | filing ↗ |
| 2026-02-13 | 1.04 | filing ↗ |
| 2026-02-11 | ResultsReg FDExhibits | filing ↗ |
| 2026-01-02 | Reg FD | filing ↗ |
| 2025-12-19 | Material agreementDebt obligationExhibits | filing ↗ |
Recent filings
| Form | Filed | Period | Accession |
|---|---|---|---|
| 8-K | 2026-05-14 | 2026-05-14 | 0001193125-26-224306 ↗ |
| 8-K | 2026-04-30 | 2026-04-30 | 0001193125-26-193931 ↗ |
| 10-Q | 2026-04-30 | 2026-03-31 | 0001193125-26-196029 ↗ |
| 8-K | 2026-04-27 | 2026-04-27 | 0000950157-26-000549 ↗ |
| 8-K | 2026-02-23 | 2026-02-23 | 0000950157-26-000175 ↗ |
| 10-K | 2026-02-19 | 2025-12-31 | 0001193125-26-059193 ↗ |
| 8-K | 2026-02-13 | 2026-02-11 | 0001193125-26-051474 ↗ |
| 8-K | 2026-02-11 | 2026-02-11 | 0001193125-26-045530 ↗ |
| 8-K | 2026-01-02 | 2025-12-31 | 0000950157-25-001042 ↗ |
| 8-K | 2025-12-19 | 2025-12-19 | 0000950157-25-001013 ↗ |
| 8-K | 2025-11-04 | 2025-11-04 | 0001193125-25-263528 ↗ |
| 10-Q | 2025-11-04 | 2025-09-30 | 0001193125-25-264566 ↗ |