Petroleum and Coal Products Manufacturing (NAICS 324)

A Histometrics rollup primer for public-market and private investors. This is a short "pass-through" page: NAICS 324 is a subsector that contains exactly one child, so its economics are its child's economics. For the full story, read the child primer — NAICS 3241, Petroleum and Coal Products Manufacturing. Reported facts are cited; forward-looking statements are labeled as judgments.

1. Overview

NAICS 324 is the industrial link between crude oil (and coal) and the finished carbon-based products a modern economy burns, drives on, and lives under. (NAICS is the North American Industry Classification System, the U.S. government's official industry taxonomy; the 3-digit "subsector" 324 sits inside Sector 31–33, Manufacturing.)

The single most important structural fact about this level is administrative: NAICS 324 has only one child, NAICS 3241, so the subsector and the industry group are the same thing. Every dollar of revenue, every plant, and every worker the government books under "324" is booked under "3241" as well. This page therefore exists mainly to (a) confirm that identity, (b) give the level's own ground-truth federal figures, and (c) hand you to the child primer, which carries the full analysis.

What that child contains, in one breath: a giant, concentrated, cash-generative refining business (~93% of the level's revenue but only ~7% of its plants and ~55% of its jobs), plus a large, fragmented asphalt paving and roofing trade (~4% of revenue but ~76% of the plants), plus a specialist lubricants, coke and carbon corner (~3% of revenue, ~17% of plants) — three very different businesses welded together by a shared feedstock (the hydrocarbon barrel) and pulled apart by almost everything else [2].

They barely share owners, either. The refiners (Marathon, Valero, Phillips 66) are not the paving majors (Vulcan, CRH) are not the shingle giants (GAF, Owens Corning) are not the coke house (SunCoke); the only genuine bridges are the diversified refiners — Phillips 66, HF Sinclair and Calumet — whose specialty arms straddle refining, lubricants, wax and needle coke [2].

2. What's inside — and why the level equals its one child

A NAICS subsector normally rolls up several 4-digit industry groups. Sector 324 is the exception: it rolls up exactly one.

Because there is a single child, there is no aggregation to do and no cross-child mix to interpret: 324's numbers are 3241's numbers. The interesting internal structure — the 93%-revenue / 7%-plants split, and the three sub-industries one level further down (32411 petroleum refineries; 32412 asphalt paving, roofing & saturated materials; 32419 other petroleum & coal products, which between them hold five 6-digit national industries) — all lives inside 3241. See the child primer for that breakdown [2].

One consequence is worth carrying up to this page, because it changes how the level's own statistics should be read: 324 pools three markets whose participants never compete with each other. That inflates the apparent number of players and deflates every concentration measure. Section 3 spells out what that does to the numbers below [2].

3. How big it is (this level's rollup figures)

Our ground-truth federal statistics for NAICS 324. As expected for a single-child level, they are identical to 3241's:

(HHI — the Herfindahl-Hirschman Index — is a concentration score; higher means fewer, bigger players. CR4/CR8/CR20/CR50 are the combined revenue shares of the top 4, 8, 20 and 50 firms.)

How to read these numbers. About 101,000 workers produced $883 billion of 2022 shipments — roughly $8.8 million of output per employee, an extreme capital intensity that flags how much of the level is refining. That average hides a 13-to-1 spread: refining runs at roughly $15 million of revenue per worker, paving and roofing at about $1.1 million [1][2]. Read "the money" as refining and "the workforce and the small business" as everything else.

The concentration ratios are worse than uninformative — they understate every real market inside the level. An HHI of 764 reads "unconcentrated" (regulators treat anything under 1,500 that way), but the level's CR4 of 49.5% is actually below refining's own 52.2%, and its HHI sits below refining's 853 [1][2]. That is not because the level is less concentrated than its biggest part; it is because pooling ~50 refining firms with 525 paving-and-roofing firms and 234 lubricants-and-carbon firms builds a "top four" out of companies that never bid against each other. The same arithmetic recurs one level down, where 32419's combined CR4 of 35.0% sits below both of its own halves (39.6% and 62.5%) [2]. Treat 324's concentration statistics as an artifact of aggregation, not a description of any market anyone actually competes in.

Caveats.

• The receipts figure is price-inflated. 2022 was a record year for crude prices and refining margins, and refining is 93% of the total, so $883 billion overstates a "normal" year. Read it as a peak-cycle print, not a run-rate. The scale of the swing is visible in Valero's refining operating income, which fell from $15.803 billion in 2022 to $3.971 billion in 2024 and $4.040 billion in 2025 [2].
• Even the plant count is a definitional artifact on the refining side. Census books 143 refining establishments; the Energy Information Administration (EIA) counts 130 operable refineries (128 operating, 2 idle) holding 18.160 million barrels per calendar day of capacity as of January 1, 2026. Census includes non-production and administrative units; EIA counts physical plants [2].
• The undercount is real but sits in the two small sub-industries, not refining. Refining is captured well by the Census, though ownership is partly hidden (large plants belong to foreign/state owners and private conglomerates a stock screener never shows). The genuine volume undercount is on the paving side, where vertically integrated road contractors' captive plants are classified under construction — the trade body NAPA reports roughly 400 million tons of pavement material worth in excess of $30 billion a year against the ~$18.2 billion Census books as manufacturing — and on the lubricants/carbon side, where full-synthetic lubes are booked as chemicals and refinery-integrated base oil and petcoke are counted inside the refineries, so market studies put total U.S. lubricants nearer $42 billion in 2024 against $19.6 billion booked here. Treat the $883B as a clean floor for refining and a material undercount for the two smaller trades [2].

4. Investable universe — where value concentrates

Because 324 equals 3241, so does its investable map: there is no single security that owns this level, and value concentrates in completely different places across the three sub-industries. Tickers appear here and in Section 10 only.

• Refining (the 93%) holds the listed value. The cleanest public exposure is the large independent refiners — Marathon Petroleum (NYSE: MPC), Valero (NYSE: VLO), Phillips 66 (NYSE: PSX) — plus diversified exposure through integrated majors ExxonMobil (NYSE: XOM) and Chevron (NYSE: CVX). Ownership of the physical asset base is genuinely concentrated: Marathon (2.986 million barrels per calendar day), Valero (2.231M), ExxonMobil (1.967M) and Phillips 66 (1.220M) together held 46.3% of U.S. capacity at January 1, 2026. The single largest U.S. refinery — Motiva's Port Arthur, Texas plant (~654,000–656,400 barrels per day) — is owned by Saudi Aramco and is not directly investable [2].
• Paving and roofing have no pure play. Paving value hides under the aggregates-led materials majors — CRH (NYSE: CRH), Vulcan Materials (NYSE: VMC), Martin Marietta (NYSE: MLM) — and the integrated road builders Knife River (NYSE: KNF), Construction Partners (NASDAQ: ROAD) and Granite Construction (NYSE: GVA); in each case asphalt is a lower-margin volume that pulls high-margin crushed stone through the system. Roofing's cleanest listed exposure is Owens Corning (NYSE: OC), because Owens Corning and privately held GAF are ~60% of the North American shingle market and only one is public; shingles also sit inside Saint-Gobain (Euronext Paris: SGO; OTC: CODYY, via CertainTeed) and Amrize (NYSE: AMRZ, via Malarkey) [2].
• Lubricants and carbon have one pure play and a lot of private. SunCoke Energy (NYSE: SXC) is the only clean listed pure-play (merchant metallurgical coke, ~3.7 million tons of U.S. capacity). Lubricants has no U.S. pure-play — the closest proxies are additive maker NewMarket (NYSE: NEU), used-oil re-refiner Clean Harbors (NYSE: CLH) and foreign-listed Fuchs SE (XETRA: FPE3) — and most dedicated ownership (Oxbow, Drummond, India-listed Rain) is private or foreign [2].
• The bridges and the trap. Phillips 66 (PSX), HF Sinclair (NYSE: DINO) and Calumet (NASDAQ: CLMT) are the only names touching more than one sub-industry, carrying refining plus lubricants, wax and needle coke; HF Sinclair is the most lube-weighted, at $2.53 billion of Lubricants & Specialties revenue and $165 million of operating income in 2025. Valvoline (NYSE: VVV) is not in this level at all any more — it sold its Global Products business to Saudi Aramco for $2.65 billion in 2023 and is now a retail quick-lube services chain [2].
• The distribution layer, adjacent to all three, has become investable. QXO (NYSE: QXO), which bought Beacon Roofing Supply for $10.6 billion in April 2025, and Home Depot (NYSE: HD), owner of SRS (~$18 billion, 2024), now capture the channel that moves product to the job site [2].

5. How the money works

Every part of the level runs on one template: profit = (product value − feedstock cost) × throughput − conversion cost. Owners earn a spread, not a bet on the oil price rising, and they live or die on plant utilization (throughput ÷ capacity) — refining utilization averaged about 90.6% in 2024 and rose to 92.0% in 2025. The signature gauge is refining's 3-2-1 crack spread — the gross margin from turning 3 barrels of crude into 2 of gasoline and 1 of distillate — which is not the same as refinery profit, since it omits secondary products, freight, energy, environmental credits, maintenance and depreciation. The vocabulary changes by sub-industry: paving earns its margin through vertical integration (quarry, terminal, mix plant, crew) with binder cost largely passed back to the government owner through contract price-adjustment clauses; merchant coke earns a fixed conversion fee under take-or-pay contracts and must run flat-out; lubricant blenders earn the base-oil-to-finished-lube spread [2].

The durable earnings sit in the premium/specialty tail, not the commodity core — and the margin gap is wide. Owens Corning's Roofing segment earned roughly $1.41 billion of EBITDA on ~$4.44 billion of 2025 sales, a 32% margin, the fattest anywhere in the level; at the other end, Vulcan sold asphalt at an average $81.93 per ton in 2025 for $16.70 per ton of cash gross profit. Both ends of the spread are currently compressing at the specialty margin: Group II base-oil prices fell to $2.54 per gallon in 2025 from $2.77 in 2024, and SunCoke's domestic coke EBITDA per ton fell from $58.27 to $46.35 as production slipped. See the child primer for the sub-industry-by-sub-industry mechanics [2].

6. Demand drivers

The level answers to several separate demand engines — transportation and industrial energy for refined fuels (2025 gasoline 8.906 million barrels per day, down from 8.967M and still below the pre-pandemic ~9.4M; distillate 3.894M; jet fuel 1.725M, with the U.S. a net exporter of about 2.4M b/d of products); government highway budgets for asphalt paving (the 2021 Infrastructure Investment and Jobs Act authorized $273.15 billion for the federal-aid highway program over FY2022–2026); home maintenance, aging roofs and storms for roofing (Saint-Gobain attributes 50% of U.S. residential roofing demand to renovation, 28% to weather and major storms, and only 22% to new construction); and a shrinking commodity core for lubricants and steel-making coke (U.S. finished-lubricant demand is down ~46% from its late-1990s peak to under 1.4 billion gallons in 2024; coke made for steel fell to roughly 10 million short tons in 2025, down ~78% since 1980, as electric-arc furnaces reached ~72% of U.S. steel production) [2].

That diversity is the level's best short-run cushion and its shared long-run vulnerability: electrification is the common swing factor, with the International Energy Agency estimating electric vehicles displaced about 1.3 million barrels per day of oil in 2024, rising above 5 million by 2030 — eroding gasoline and engine-oil gallons — while electric-arc steelmaking erodes metallurgical coke. Diesel, jet fuel, road wear (EVs still drive on roads), re-roofing, EV thermal-management fluids, needle coke and battery graphite are stickier or even growing. Net read: a large, mature demand base with a slow transition headwind and a handful of quiet growth pockets, not a growth story [2].

One internal disagreement worth flagging. The roofing case rests on durable low-single-digit replacement growth, but the shipment data points the other way over the last two years: ARMA reports approximately 140 million U.S. shingle squares shipped in 2025, down from 161 million in 2024 and 169 million in 2023. The child primer names this tension rather than resolving it; treat "steady replacement" as a thesis about the installed base, not a description of 2024–25 volumes [2].

7. Regulation

Nothing here is price-regulated — this is not a utility or a rate base — but the whole level is governed by environmental, safety and product-quality regimes, with intensity varying sharply within it. Refining is the most heavily regulated (Clean Air Act fuel standards under the Environmental Protection Agency (EPA); the Renewable Fuel Standard and its tradable RINs, finalized at 26.81 billion RINs for 2026 and 27.02 billion for 2027, plus Small Refinery Exemptions, on which EPA acted in August 2025 across 175 petitions and granted full or partial relief on 140; California's Low Carbon Fuel Standard; the Jones Act on domestic shipping). Permitting a new refinery is effectively prohibitive — no plant with significant downstream conversion capacity has been built since Marathon's Garyville refinery in 1977 — which is why the asset base only shrinks [2].

Paving and roofing are permitting- and budget-constrained: hot-mix plants are a recognized Clean Air Act source category, asphalt roofing plants fall under EPA's NESHAP hazardous-air-pollutant standards, and decarbonization now arrives as procurement policy (the Federal Highway Administration has awarded $1.2 billion to 39 state transportation departments for lower-carbon materials). The coke/carbon side carries the heaviest emissions burden — coke-oven emissions are a classified human carcinogen, and EPA tightened the coke NESHAP in 2024 with fenceline benzene monitoring, then withdrew an interim compliance-deadline extension in 2025. The common thread: decarbonization pressure weighs on each fossil-linked core while purity and product-grade standards protect the specialty tail [2].

8. Consolidation

Every part of the level is consolidating as its demand core flattens or shrinks — from opposite structural starting points. Refining consolidates by running assets harder and closing the weak: LyondellBasell's ~264,000 b/cd Houston plant (March 2025), Phillips 66's ~139,000 b/cd Los Angeles refinery (October 2025) and Valero's ~145,000 b/d Benicia, California refinery (ceasing 2026) together remove more than 400,000 barrels per day. Paving is a classic roll-up of locally defensible plants — Construction Partners added 27 plants through five acquisitions in 2025 for roughly $1.5 billion, and Quikrete took Summit Materials private for ~$11.5 billion in February 2025. Roofing is a consolidating oligopoly with fewer, larger moves (Holcim's $1.35 billion purchase of Malarkey in 2022, later folded into the 2025 Amrize spin-off). Lubricants and carbon consolidate around the survivors (Aramco–Valvoline at $2.65 billion; BP's pending sale of 65% of Castrol to Stonepeak at a ~$10.1 billion valuation; Clean Harbors rolling up re-refining). The distribution layer adjacent to all of them is consolidating fastest of all — QXO–Beacon at $10.6 billion and Home Depot–SRS at ~$18 billion. The through-line: whether the start point is concentrated or fragmented, scale and capital increasingly win [2].

9. Risks

• Feedstock / oil volatility. Because refining is 93% of revenue, the level's headline results swing violently with crack spreads — Valero's refining operating income fell roughly three-quarters between 2022 and 2024 [1][2].
• The energy transition (staggered). Electric vehicles and efficiency erode gasoline and engine oil; electric-arc steel erodes metallurgical coke — the defining long-run risk to terminal value. Substitution is uneven even within refining: road gasoline is most exposed, while aviation, heavy freight and petrochemical feedstocks have slower substitution paths [2].
• Policy and budget cliffs. Renewable-fuel, small-refinery-exemption and California rules for refining; the IIJA highway authorization expiring September 30, 2026 for paving, with reauthorization the single biggest swing factor for medium-term demand [2].
• Operational, labor and weather hazards; capital intensity and stranded assets. Refinery fires and outages against a thin bench of experienced operators and turnaround contractors, storm-driven lumpiness in re-roofing, short or wet paving seasons, high break-even volumes, and long-lived coke batteries and calciners that are hard to repurpose [2].
• Trade and end-of-life exposure. Roughly 90% of U.S. fuel-grade petcoke is exported, making it tariff- and freight-sensitive; on the roofing side, EPA estimated approximately 15 million metric tons of asphalt shingles were discarded in 2018, about 13 million of them landfilled — a disposal cost recycling economics have not yet solved [2].
• Hidden and inaccessible ownership. Much of the value sits outside public markets — foreign/state refiners, private shingle and carbon houses, thousands of small paving contractors — so the listed "sector" a screener shows is only a slice [2].

10. How to invest, and the outlook

Public routes — pick your sub-industry, because there is no whole-level security. For the money (refining): the large independents Marathon (MPC), Valero (VLO), Phillips 66 (PSX), with smaller/higher-beta names PBF Energy (NYSE: PBF), HF Sinclair (DINO), Delek (NYSE: DK), CVR Energy (NYSE: CVI) and Par Pacific (NYSE: PARR), and majors ExxonMobil (XOM) / Chevron (CVX) for diversified exposure — capital-return cyclicals, bought when margins and valuations are depressed, not steady compounders. For infrastructure exposure (paving/roofing): CRH, Vulcan (VMC), Martin Marietta (MLM) and the more directly geared road builders Knife River (KNF), Construction Partners (ROAD) and Granite Construction (GVA); Owens Corning (OC) for the cleanest roofing margin, with Saint-Gobain (SGO) and Amrize (AMRZ) carrying shingles inside diversified parents; QXO and Home Depot (HD) for distribution. For the specialty tail (lubricants/carbon): the bridge refiners PSX / DINO / CLMT, additive maker NewMarket (NYSE: NEU), recycler Clean Harbors (NYSE: CLH), foreign pure-play Fuchs (FPE3) and coke pure-play SunCoke (SXC) — an income-oriented, contracted-cash-flow name (recent market cap ~$0.55B, dividend yield in the ~5–7% range). Valvoline (VVV) is not this industry; it is now retail services [2].

Private routes — where most of the level actually lives. Refineries are effectively closed to individuals (public companies, national oil companies, private conglomerates), with entry at institutional scale — the 2025 Citgo auction cleared at roughly $5.9 billion. Paving's thousands of local plants and roofing's private giants (GAF, with 30 U.S. locations under Standard Industries; IKO, Atlas, TAMKO, PABCO) are recurring private-equity and strategic-buyer targets, and the carbon side is largely private (Oxbow, Drummond, Duraflame, IGI) or foreign-listed (Rain), with private-equity interest on the lubricants side clustering in re-refining and high-purity niches. Investors can also take the funding side of paving through municipal-bond exposure to state and local transportation programs [2].

Outlook (forward-looking judgment). NAICS 324 is a mature, consolidating, cash-generative subsector with a slow transition headwind — best read child by child: refining generates strong near-term cash flow as tightening supply supports survivors' crack spreads, with exports (especially Gulf Coast diesel) the release valve for flat domestic gasoline, even as the transition clock compresses terminal value; paving enjoys a supportive 2025–26 backdrop from the final IIJA years, with reauthorization after September 30, 2026 the key uncertainty; roofing rests on a large, aging housing stock and insurer-forced replacement — a durable structural story that nonetheless has to reconcile with two consecutive years of falling shingle shipments; lubricants and carbon are a specialist's corner owned for cash flow and a few quiet growth pockets, with base-oil oversupply pressuring blending margins near-term. These are judgments about direction, not guarantees.

For the full analysis — the three sub-industries, the detailed economics, and the complete investable map — see the child primer: NAICS 3241, Petroleum and Coal Products Manufacturing.

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Sources

Drawn from our federal ground-truth statistics for NAICS 324 and the single child primer (3241).

1. U.S. Census Bureau — Histometrics ingested federal ground-truth statistics for NAICS 324: 2022 Economic Census / Concentration by Largest Firms (receipts $883.348B; 790 firms; CR4 49.5%, CR8 68.4%, CR20 89.5%, CR50 96.6%; HHI 763.8) and County Business Patterns 2023 (2,073 establishments; 100,856 employees; $12.914B annual payroll; $3.915B Q1 payroll). Figures are identical to child NAICS 3241 because 3241 is the subsector's only child. https://data.census.gov
2. Histometrics child primer — NAICS 3241, Petroleum and Coal Products Manufacturing, which synthesizes its own three children (32411 Petroleum Refineries; 32412 Asphalt Paving, Roofing & Saturated Materials; 32419 Other Petroleum & Coal Products). Source of all sub-industry structure and every non-Census figure on this page: revenue/plant/jobs splits (~93%/~4%/~3% of receipts; ~7%/~76%/~17% of plants; ~55%/~29%/~17% of jobs) and revenue per worker (~$15M refining, ~$1.1M paving/roofing, ~$1.5M other); child concentration (refining HHI 853.2 / CR4 52.2% / CR20 94.6%; paving-and-roofing HHI 341.9 / CR4 31.2%, with paving HHI 192 / CR4 22.2% versus roofing HHI 1,366 / CR4 66.9%; other CR4 35.0% against halves of 39.6% and 62.5%); EIA 130 operable refineries and 18.160M b/cd at January 1, 2026; top-four company capacity 46.3%; Motiva Port Arthur ~654,000–656,400 b/d; utilization 90.6% (2024) and 92.0% (2025); Valero refining operating income $15.803B (2022), $3.971B (2024), $4.040B (2025); 2025 gasoline 8.906M b/d, distillate 3.894M b/d, jet 1.725M b/d, product exports ~2.4M b/d; RFS 26.81B RINs for 2026 and 27.02B for 2027, 140 of 175 small-refinery exemptions, Garyville 1977; 2025–26 closures (LyondellBasell ~264,000 b/cd, Phillips 66 Los Angeles ~139,000 b/cd, Valero Benicia ~145,000 b/d); ~$5.9B Citgo auction; NAPA ~400M tons and $30B+ versus ~$18.2B Census; RAP 101.4M tons reused in 2024; Vulcan asphalt $81.93/ton and $16.70/ton cash gross profit; Owens Corning Roofing ~$4.44B sales, ~$1.41B EBITDA, 32% margin; IIJA $273.15B FY2022–2026 expiring September 30, 2026 (correcting an earlier ~$350B figure); U.S. transportation construction ~$203.5B in 2025; roofing demand mix 50/28/22; ARMA 140M squares in 2025 versus 161M in 2024 and 169M in 2023; NESHAP and FHWA $1.2B low-carbon materials; QXO–Beacon $10.6B, Home Depot–SRS ~$18B, Quikrete–Summit ~$11.5B, Holcim–Malarkey $1.35B; EPA ~15M metric tons of shingles discarded in 2018 (~13M landfilled); HF Sinclair Lubricants & Specialties $2.53B revenue and $165M operating income in 2025; SunCoke ~3.7M tons capacity and EBITDA per ton falling $58.27 to $46.35, market cap ~$0.55B and ~5–7% yield; Argus Group II N100 $2.54/gal in 2025 versus $2.77 in 2024; U.S. lubricant demand −46% to under 1.4B gallons in 2024 and a total market ~$42B; petcoke ~46M tons/yr with ~90% of fuel-grade exported; coke for steel ~10M short tons in 2025, −78% since 1980, EAF ~72% of U.S. steel; IEA EV oil displacement ~1.3M b/d in 2024 rising above 5M by 2030; Valvoline's $2.65B Aramco sale and BP–Castrol/Stonepeak ~$10.1B. The child primer in turn draws on the U.S. Energy Information Administration (EIA), the National Asphalt Pavement Association (NAPA), the Federal Highway Administration (FHWA), the U.S. Environmental Protection Agency (EPA), the International Energy Agency (IEA), and company SEC filings. /primers-preview/3241