Snapshot

Cement, aggregates (crushed stone, sand, gravel), and ready-mixed concrete are the physical backbone of construction. The U.S. consumed roughly 114 million short tons of cement and 2.6 billion tons of aggregates in 2025, generating approximately $17 billion in cement revenue at the mill and $40 billion in aggregates revenue at the quarry. Demand is driven by highway and infrastructure construction (the largest end market), commercial and residential building, and data center construction. Aggregates are inherently local: heavy and cheap relative to weight, they are uneconomic to ship more than 30-50 miles from a quarry, giving incumbent producers with permitted reserves a durable geographic moat. Cement is similar but somewhat more tradeable, with imports filling 24% of U.S. consumption in 2025. The original scan listed four tickers: VMC, MLM, EXP, and SUM. SUM (Summit Materials) was acquired by Quikrete for $52.50/share ($11.5B enterprise value) and ceased trading on the NYSE on February 10, 2025. CRH, the world's largest building materials company by revenue (NYSE-listed, $37.4B revenue in 2025), is included for comparison as the remaining major public player with large U.S. cement and aggregates operations.

Whoever owns the permitted quarry near the construction site has pricing power. New quarries face 5-10+ years of permitting and community opposition, so existing reserves function as a slow-depleting franchise. Aggregates pricing compounded at 5.5% per year from 2014 to 2024 while volume growth was nearly flat — the value here is pricing power in a supply-constrained local market, not volume growth.

The product & how money is made

Aggregates are crushed stone, gravel, and sand — the bulk filler in concrete, asphalt, and road base. A quarry blasts rock, crushes it to specification, and sells it by the ton. In 2024, U.S. crushed stone averaged $15.88 per ton and sand/gravel averaged $12.61 per ton at the quarry gate — up from $9.26 and $7.29 respectively in 2014, a compound growth rate of roughly 5.5% per year over the decade. The product is interchangeable within a grade; what differentiates producers is location (proximity to the construction site), permitted reserves (decades of rock remaining), and cost per ton.

Source: USGS data via Concrete Financial Insights; pricing 2014-2024 CAGR from same.

Cement is the powder (portland cement) that, mixed with water and aggregates, forms concrete. It is manufactured by heating limestone and clay to ~1,450 degrees C in a kiln to produce clinker, which is ground into powder. Cement production is capital-intensive (kilns cost hundreds of millions of dollars), energy-intensive, and subject to emissions regulation (cement kilns are a significant CO2 source). The U.S. has roughly 99 cement mills across 34 states. Domestic capacity has been relatively stagnant over the past decade, with imports filling the gap — 27 million short tons of net imports in 2025, up from 7% of consumption in 2012 to 24% in 2025. Turkey, Vietnam, and Canada supplied 70% of imports.

Source: USGS via Concrete Financial Insights (2025 import data); Wikipedia, "Cement industry in the United States" (plant count); Concrete Financial Insights (import share trend).

How money flows. A producer's cash engine is: (price per ton - cost per ton) x tons shipped. Aggregates producers have relatively low capex per ton once a quarry is established — the rock is already in the ground. Main ongoing costs are drilling, blasting, crushing, and hauling. Cement plants have higher fixed costs (kiln maintenance, energy, emissions compliance). Both businesses are volume-sensitive: fixed costs are spread across tons shipped, so a construction downturn compresses margins more than the volume decline alone would suggest. In an upturn, incremental tons at an existing quarry carry high margins because the fixed cost base is already covered.

Vulcan Materials reported $11.33 cash gross profit per ton on aggregates in 2025 (freight-adjusted cost of $10.65/ton, freight-adjusted price of $21.98/ton). At 226.8 million tons shipped, that produced $1.97 billion in aggregates segment gross profit. Martin Marietta reported $1.7 billion in aggregates gross profit on $5.0 billion of aggregates revenue. Both companies convert a high share of EBITDA to free cash flow because quarries require modest maintenance capex relative to earnings.

Source: VMC Q4/FY2025 press release (StockTitan); MLM Q4/FY2025 earnings (Quartr).

Demand

Contracted / visible demand

There are no order backlogs in aggregates or cement — these are spot and short-term contract businesses. However, several large, multi-year demand drivers are funded and underway:

• Infrastructure Investment and Jobs Act (IIJA): $550 billion in new spending authorized over five years (2021), with the largest allocation to highways and bridges. Federal highway obligations were $53.6 billion in FY2024 and $52.6 billion in FY2025, above the $46.4 billion pre-IIJA baseline. Spending peak expected 2025-2027 as funded projects move from planning to construction. The IIJA expires in 2026 and will need reauthorization.
• State and local highway spending runs roughly 3x the federal share. State DOT budgets set the floor for aggregates demand in any region.
• Data center construction: The ACA forecast (June 2025) that U.S. AI data center construction will require approximately 1 million metric tons of cement by 2028. The U.S. has 5,426 data centers today, projected to reach 6,000 by 2027. Annual data center construction spending was $27.4 billion and grew 55% in the prior year. Data center concrete foundations must support extremely heavy server loads (a rack can weigh 2,000-3,000 lbs), requiring thick reinforced slabs.

Source: ACA report (Jun 2025) via cement.org; IIJA spending via BTS/FHWA data; data center count from ACA.

Forecast / directional demand

• Aggregate volumes remain 23% below the 2006 peak of ~3.4 billion tons. The 2025 figure of 2.6 billion tons has recovered from post-2008 lows but has not returned to the prior cycle's peak. Volume CAGR from 2015 to 2025 was 0.6% for crushed stone and 0.1% for sand/gravel — nearly flat in tonnage. Growth has been in price, not volume.
• Cement shipments at 114 million short tons in 2025 are 18% (25 million tons) below the 2005 peak of ~139 million short tons est.. CAGR from 2015 to 2025 was 1.0% per year.
• VMC guides 2026 aggregates shipments of 230-234 million tons (+1-3%) with freight-adjusted pricing up 4-6%. MLM guides 2026 aggregates shipments up 2% with pricing up 5%. Both expect price growth to exceed cost inflation.
• Data center cement demand (1M metric tons by 2028) is roughly 1% of total U.S. cement consumption (114M short tons ~ 104M metric tons est.). Additive but not transformative to the total market.

Source: USGS via Concrete Financial Insights (peak/CAGR data); VMC/MLM 2026 guidance from earnings releases; ACA for data center cement.

Supply

Capacity

• Aggregates: Supply is constrained by permitted reserves, not production technology. Vulcan Materials holds 16.6 billion permitted tons of reserves across 425 sites in 23 states — over 70 years of reserve life at current shipment rates. Martin Marietta operates over 500 locations across 29 states (specific reserve tonnage not disclosed, but the 10-K reports a comparable multi-decade position est.). The top five producers together control a minority of total national output, but because aggregates are local, what matters is market share within a 30-50 mile radius — and there, individual producers often face one or zero competitors.
• Cement: Approximately 99 U.S. cement mills. Domestic capacity has been stagnant for a decade, with some plants modernized (Portland Limestone Cement conversions added 10-15% capacity at converted plants in 2022-2023) but others closed due to emissions compliance costs under the 2010 NESHAP standards. The shortfall is filled by imports: 27 million short tons in 2025 (24% of consumption). The top five cement producers historically accounted for ~59% of domestic portland cement production, and the top ten for ~79%.

Source: VMC investor day (16.6B tons, 425 sites, 70+ yr reserve life); Concrete Financial Insights (cement capacity, PLC conversions, imports); Wikipedia (99 mills, industry concentration).

Bottleneck

• Quarry permitting is the binding constraint for aggregates. Permitting a new quarry requires environmental review, community hearings, and zoning approval — 5-10+ years, often failing entirely due to local opposition. Once permitted, a quarry has a multi-decade franchise because no competitor can readily open nearby.
• Cement capacity takes 3-5 years and $300-500M+ est. to build. U.S. cement producers have chosen to import rather than build new kilns, likely because the permitting and emissions compliance burden is high and the return on new kiln construction is uncertain against low-cost imports from Turkey and Vietnam.
• No substitution risk for aggregates. There is no alternative to crushed stone and sand in concrete — they are physically irreplaceable. Cement faces some competition from supplementary cementitious materials (fly ash, slag, limestone filler), which partially replace portland cement in concrete mixes, but these stretch the supply rather than eliminate it.

Source: Pit & Quarry (permitting difficulty); 500-stocks scan (quarry permitting, local monopoly); Concrete Financial Insights (cement imports, PLC conversions).

The gap

Volume growth is slow, but price growth has been persistent and well above inflation for a decade. Supply cannot respond quickly (quarry permitting, kiln construction) while demand is supported by multi-year federal infrastructure spending. Data center construction adds incremental cement demand (~1% of total market by 2028), not a step change. Both VMC and MLM guide mid-single-digit price increases into 2026 with cost growth below that, implying further margin expansion. A recession or construction downturn would reduce volumes and compress margins (these are cyclical businesses), but the reserve position and permitting moat would remain intact through a downturn.

The players

Three remaining pure-play U.S.-listed companies plus CRH (the world's largest building materials company, now NYSE-listed). SUM (Summit Materials) was taken private by Quikrete in February 2025 for $52.50/share.

Source: VMC FY2025 press release (StockTitan); MLM FY2025 earnings (Quartr/MarketBeat); EXP FY2025 results (TradingView/BusinessWire) + MarketBeat for balance sheet; CRH FY2025 results (crh.com) + Stock Analysis for market cap. SUM acquisition per StockTitan.

Notable transaction: Martin Marietta announced an asset swap with Quikrete — MLM is divesting its last cement plant (Midlothian, TX) and related concrete operations in exchange for ~20 million tons/year of aggregates production in Virginia, Missouri, Kansas, and British Columbia, plus $450 million in cash. This moves MLM to a pure aggregates model. Expected to close Q1 2026.

The price of exposure

VMC and MLM trade at roughly 18-20x trailing EBITDA; EXP and CRH at roughly 10-11x. The gap reflects the market pricing the pure aggregates model (local monopoly, multi-decade reserves, persistent mid-single-digit pricing power) as a higher-quality cash stream than a cement/wallboard mix (EXP) or a diversified global conglomerate (CRH).

Capital return. VMC returned $698M to shareholders in 2025 ($438M buybacks + $260M dividends) on $1.81B of operating cash flow and $703M of capex. MLM's capex was ~$807M against $1.79B of operating cash flow; 2026 capex is guided down 29% to $575M. EXP spent $298M on buybacks in its fiscal year (ending Mar 2025), reducing share count by ~4%. CRH returned $2.2B to shareholders while also deploying $5.8B in acquisitions. All four carry moderate leverage (1.8-2.5x net debt/EBITDA).

Source: VMC press release; MLM earnings/MarketBeat; EXP TradingView/MarketBeat; CRH press release. Multiples computed from reported figures and market caps; labeled est. where derived.

What to deep-dive next

• VMC and MLM — pure aggregates plays. Both trade at premium multiples (~18-20x EV/EBITDA). Key questions: per-ton economics across specific geographies, reserve replacement rate (acquiring new quarries faster than depleting existing ones?), how much of the margin expansion is price vs. cost vs. mix. VMC discloses more granular per-ton data than MLM.
• EXP — lower-multiple, dual-business play. At ~10x EV/EBITDA, substantially cheaper than VMC/MLM. Key question: does the cement + wallboard mix deserve the discount, or is the market underpricing EXP's cement assets (7 plants in Texas and Midwest where construction is strong)? Fiscal 2026 results (ending Mar 2026) showed revenue of $2.3B and EBITDA of $733M, with heavy share repurchases reducing the float.
• CRH — diversified giant. At ~11x EV/EBITDA on $7.7B of EBITDA and $5.0B of adjusted free cash flow. Key question: what share of CRH's value comes from U.S. aggregates/cement operations vs. lower-margin international businesses? Requires segmenting the U.S. vs. international P&L.
• IIJA reauthorization. The bill expires in 2026. If the next bill is smaller or delayed, aggregates volumes could soften — though pricing may hold given supply constraints.
• The multiple gap between aggregates and cement. MLM is divesting its last cement plant to go pure aggregates. What is the actual ROIC for a quarry vs. a kiln?

Sources & confidence

What was used:

• 500-stocks scan, Industrial, Construction & Engineering module, Section 15: "Concrete, Cement & Aggregates" — the company list (VMC, MLM, EXP, SUM), supply/demand dynamics (local monopoly, permitting difficulty, tight cement capacity, imports).
• USGS data via Concrete Financial Insights (cement, aggregates) — 2025 cement shipments (114M short tons), aggregates output (2.6B tons), pricing CAGRs ($15.88/ton crushed stone, $12.61/ton sand in 2024), import share (24%), prior peaks, market sizes ($17B cement, $40B aggregates).
• American Cement Association (ACA), June 2025 report via cement.org — ~1M metric tons cement for AI data centers by 2028; 5,426 current U.S. data centers; $27.4B annual DC construction spending.
• VMC FY2025 earnings press release via StockTitan — revenue, EBITDA, per-ton economics, capex, debt, 2026 guidance. VMC investor day via TradingView — 16.6B permitted tons, 425 sites, 70+ yr reserve life.
• MLM FY2025 earnings via Quartr and MarketBeat — revenue, EBITDA, net income, capex, debt, 2026 guidance. MLM-Quikrete asset swap via StockTitan.
• EXP FY2025 results via TradingView and MarketBeat — revenue, EBITDA, net income, debt, market cap, share count.
• CRH FY2025 results via crh.com; market cap via Stock Analysis.
• SUM acquisition by Quikrete confirmed via StockTitan — closed Feb 10, 2025, $52.50/share, $11.5B EV.
• Wikipedia, "Cement industry in the United States" — 99 cement mills, industry concentration (top 5 = 59%, top 10 = 79% of production).

Hard vs. approximate:

• Reasonably hard (from filings or USGS): VMC revenue ($7.94B), tons shipped (226.8M), cash GP/ton ($11.33), debt ($4.36B), reserves (16.6B tons); MLM revenue ($6.15B), EBITDA ($2.10B), debt ($5.32B); EXP revenue ($2.3B), EBITDA ($817M), market cap ($6.0B); CRH revenue ($37.4B), EBITDA ($7.7B); U.S. cement shipments (114M short tons); aggregates output (2.6B tons); import share (24%); SUM acquisition price ($52.50/share, Feb 10, 2025).
• Approximate est.: All EV/EBITDA and P/E multiples (computed from reported figures and market caps that may have moved); MLM per-ton economics (inferred); CRH net debt and derived multiples; cement kiln construction costs ($300-500M+); MLM reserve characterization ("multi-decade"); EXP EBITDA margin (~36%). The 1M metric ton data center cement figure is from an industry forecast (ACA), not contracted volumes.