Motor Vehicle Metal Stamping (U.S.) — Industry Primer (5-digit rollup)

NAICS 2022 code 33637. NAICS is the North American Industry Classification System, the federal standard for sorting businesses by activity. This is a five-digit NAICS industry; it sits one rung above the six-digit national industry that carries the full detail.

Short page — single-child pass-through. NAICS 33637 contains exactly one child, 336370 (Motor Vehicle Metal Stamping), and is effectively identical to it. This page gives the level's own federal figures and the one-paragraph version of the story. For the full primer — how the money works, the investable universe, demand drivers, regulation, and risks — see the child page, 336370.

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1. Overview

Motor vehicle metal stamping is the business of pressing flat sheets of steel or aluminum into the shaped parts of a car or truck — fenders, hoods, doors, roof panels, floor pans, structural rails, and brackets. A supplier feeds sheet metal into a press fitted with a custom steel die (the shaped tool); each stroke punches out a part. It is one of the most capital-intensive, high-volume, thin-margin corners of the auto supply chain.[1]

For an investor it is a classic "picks and shovels" bet on vehicle manufacturing rather than on any one automaker: every North American vehicle contains hundreds of stamped parts, tying the industry to auto build rates, steel and aluminum prices, and trade policy.

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

Five-digit NAICS 33637 has a single six-digit child:

When a five-digit industry has only one national industry beneath it, the two are definitionally the same set of businesses — the Census Bureau simply did not need to split the category further. So 33637 and 336370 carry identical scope, identical firms, and identical statistics. There is no aggregation to do and no sibling industries to weigh against each other. This page therefore stays short and hands you to 336370 for everything below the headline.

What internal shape the level has is process, not product: cold stamping (sheet formed at room temperature, the bulk of body panels and brackets) versus hot stamping / press hardening (boron steel heated, formed, and quenched in the die to reach ultra-high strength, used for crash-critical pillars, door beams, and battery-enclosure frames). The code also stops at the stamping operation itself: non-automotive stampings sit in 332119, a plant that stamps a part and then builds it into a finished product is classified by that product, and the assembly plants (336110) and the steel and aluminum mills that supply the sheet are separate codes entirely.[1]

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3. Size (this level's rollup figures)

Because the level equals its one child, the federal figures for 33637 are the child's figures. Our ground-truth stats for NAICS 33637 (United States):

Concentration is statistically low: the top 4 firms hold 23.5% of receipts, the top 8 hold 36.5%, the top 20 hold 53%, and the top 50 hold 69.4%; the Herfindahl-Hirschman Index (HHI, a standard concentration gauge where under 1,500 is "unconcentrated") is just 225.7.[2] SBA is the U.S. Small Business Administration.

The two federal headcounts disagree. County Business Patterns counts 106,098 employees, while the Bureau of Labor Statistics (BLS) reported roughly 84,400 payroll jobs in motor vehicle metal stamping in November 2024 — a different measurement concept rather than a revision to the Census number.[3][5] Treat the range, not either figure alone, as the industry's employment.

Undercount caveat — important here. These figures capture the merchant (independent-supplier) stamping industry, but they materially understate total U.S. vehicle-stamping activity. Automakers do enormous amounts of stamping in-house, and those captive plants are generally classified under vehicle manufacturing (NAICS 336110) rather than here. So the $40.5 billion and 106,000 jobs are the independent slice, not the whole. The "low concentration" reading is also partly an artifact: the biggest forces are foreign-parented (Magna, Gestamp, Kirchhoff, Benteler) and the automakers' own stamping sits outside this code entirely.

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4. Investable universe (where the value sits)

With a single child, all of the level's investable value concentrates in that one industry — there are no sibling categories to spread it across. And within 336370 there is no pure-play, U.S.-exchange-listed stamper of scale. Public exposure comes through large diversified parts suppliers where stamping is one segment: Magna International (MGA), whose Body Exteriors & Structures segment did $16.6 billion of sales at an 8.1% adjusted EBIT margin in 2025;[6] Martinrea International (MRE), at a 5.6% adjusted operating margin in 2025;[7] and in Europe Gestamp (€11.3 billion revenue, €1.3 billion EBITDA in 2025) and voestalpine.[8][9] Magna's own filed competitor list — Gestamp, Flex-N-Gate, CIE Automotive, Metalsa, F-Tech, Minth, Nemak, Georg Fischer — is a useful map of the wider competitive set.[10] Most dedicated stamping is either captive (in-house at the automakers) or held by private-equity-backed and family-owned Tier-1/Tier-2 suppliers ("Tier-1" means a direct supplier to the vehicle maker; "Tier-2" supplies the Tier-1). Private capital, not public markets, is where most of this industry trades hands. See 336370 for the full company table, public and private.

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5. How the money works

Owners make money on piece price times volume, minus the cost to convert metal into parts — and the margins are thin. A supplier wins a multi-year program (often the 4–7-year "life of the platform") to make a specific part at a fixed piece price; revenue is that price times however many vehicles the automaker actually builds. Steel and aluminum typically run more than 60% of cost,[11] but the pass-through is more structured than a simple lag: Magna reports that roughly two-thirds of its combined steel and aluminum purchases are made through OEM resale programs on terms the automaker negotiates, with the rest on annual or index-linked contracts.[10] The exposure is therefore the gap among material inflation, scrap credits, contractual pass-throughs, and the timing of commercial recoveries — and a fast metal spike still squeezes the stamper first. Tooling is the other capital trap: a progressive die runs roughly $15,000–$60,000 and a large transfer die for a body panel can exceed $1 million, and hard tooling only pays off above roughly 10,000–20,000 units a year, so press utilization is everything.[12] The economic signature is capacity utilization, input-cost pass-through, and cyclicality — dialed up by heavy commodity exposure and a few powerful customers. Full detail is on 336370.

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6. Demand drivers

Demand tracks North American vehicle production, not just sales — stampers get paid on units built (U.S. plants produced about 10.4 million vehicles in 2024; the U.S. light-vehicle seasonally adjusted annual rate, SAAR, was about 15.9 million in April 2026 against 2025 sales near 15.3 million).[13][14] A truck- and SUV-heavy mix raises stamped-metal content per vehicle. Fuel-economy and safety rules push lightweighting toward aluminum and ultra-high-strength steel — the Department of Energy notes advanced high-strength steel can cut component weight by as much as 25%, with material substitution producing 10%–60% component-weight reductions depending on the part.[15] And the electric-vehicle (EV) transition is two-sided: new demand for battery enclosures and structural pack frames now, but a lower-steel car over the long run (one projection has average steel content falling from ~35% of vehicle weight in 2020 toward ~17% by 2050).[16] Hybrids, plug-in hybrids, and battery-electric vehicles together were about 22% of U.S. light-duty sales in 2025, up from 20% in 2024.[17] See 336370 for the full driver list.

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7. Regulation

The same regime that governs the child governs this level: Corporate Average Fuel Economy (CAFE) standards, administered by the National Highway Traffic Safety Administration (NHTSA), and EPA (Environmental Protection Agency) greenhouse-gas rules that push lightweighting; NHTSA crash-safety rules that sustain demand for structural stampings; and — most directly — trade policy. Section 232 tariffs on imported steel and aluminum were raised from 25% to 50% in June 2025, lifting the industry's main input cost, and a separate 25% auto-parts tariff took effect in May 2025 with offset credits for domestic assemblers and a possible exemption under the U.S.-Mexico-Canada Agreement (USMCA).[18] That offset credit steps down from 3.75% of qualifying U.S.-assembled vehicle MSRP through April 2026 to 2.5% through April 2027,[19] and at the scheduled July 2026 USMCA review the administration declined to extend the agreement in its current form — a live source of uncertainty.[20] Below the trade layer sit the plant-level rules: OSHA's mechanical-power-press standard (guarding, inspection, safe die handling, operator training)[21] and EPA air and water rules that reach metal-parts surface coating and metal-finishing wastewater.[22] Full treatment on 336370.

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8. Consolidation

The industry is fragmented at the bottom, consolidated at the top: hundreds of small regional and captive stampers keep statistical concentration low, but a handful of global Tier-1s dominate the merchant structural business — Gestamp, Magna, Martinrea, Benteler, Kirchhoff, Autokiniton, and voestalpine together held roughly 28% of the U.S. steel-stamping market in 2025.[23] Pricing power sits with the automakers, and downturns produce distress: Tower International (~$1.6 billion of revenue, ~5,700 employees) was taken private by Autokiniton/KPS Capital Partners in 2019 at $31 a share, forming North America's No. 2 body-in-white and vehicle-frame supplier, and Shiloh Industries' assets were bought out of Chapter 11 by MiddleGround Capital (Grouper Holdings) for about $400 million in 2020–21.[24][25] The recurring pattern is private-equity roll-ups and turnarounds plus an ongoing make-vs-buy tug-of-war — Magna notes automakers may insource components to protect employment commitments as electric powertrains eliminate other mechanical content.[10] A newer pressure comes from outside the press shop entirely: large-format aluminum casting ("gigacasting") can replace assemblies once built from many stamped and welded pieces, and suppliers are answering with bigger integrated "gigastampings," hot-formed parts, and their own casting capability.[26][27] See 336370.

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9. Risks

Cyclicality is the first-order risk and it is severe — real sectoral output for this industry fell 20.2% in 2008 and 29.7% in 2009 before rebounding 43.7% in 2010, then fell another 14.7% in 2020.[28] After that: raw-material and tariff cost (metal is 60%+ of cost; tariffs now 50% on imported metal),[11][18] customer concentration and automaker pricing leverage, program and launch risk on expensive part-specific dies, capital intensity, labor stoppages (the 2023 UAW — United Auto Workers — strike starved suppliers of volume), workplace hazards (three fatal occupational injuries and a 3.5-per-100-workers recordable case rate in 2024),[29][30] gigacasting substitution for stamped-and-welded assemblies,[26][27] the long-run EV steel-content decline,[16] and unresolved USMCA trade-policy uncertainty.[20] These are the child's risks. See 336370 for detail.

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10. How to invest & outlook

Because there is no U.S.-listed pure play, equity investors buy stamping as a segment inside diversified, foreign-listed Tier-1 suppliers — chiefly Magna (MGA) and Martinrea (MRE), or Gestamp and voestalpine in Europe — while most direct ownership runs through private equity and family holdings.[6][7][8][9][24][25] The near-term setup hinges on North American build rates holding near a 15–16 million SAAR (Cox Automotive projects roughly 15.8 million U.S. sales for 2026), whether stampers can pass through the higher 50% metal tariffs without margin damage, the USMCA review outcome, the truck/SUV mix, and how fast EV battery-enclosure content offsets the secular decline in steel per vehicle.[13][16][18][20] Balanced read: a mature, cyclical, low-margin manufacturing base with real near-term tailwinds set against customer power, commodity and trade volatility, gigacasting substitution,[26] and a long-run lightweighting shift. For the complete analysis, read the child primer, 336370.

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Sources

Drawn from the child primer (NAICS 336370), renumbered for this page.

1. NAICS Association / U.S. Census Bureau, "NAICS Code 336370 — Motor Vehicle Metal Stamping (definition and exclusions)," 2022. https://www.naics.com/naics-code-description/?code=336370
2. U.S. Census Bureau, 2022 Economic Census — Industry concentration and receipts, NAICS 336370 (receipts $40.5B; 556 firms; CR4 23.5%, CR8 36.5%, CR20 53%, CR50 69.4%; HHI 225.7), 2022. https://www.census.gov/programs-surveys/economic-census.html
3. U.S. Census Bureau, County Business Patterns, NAICS 336370 (106,098 employees; 728 establishments; $6.6B annual payroll), 2023. https://www.census.gov/programs-surveys/cbp.html
4. U.S. Small Business Administration, Table of Small Business Size Standards (NAICS 336370: 1,000 employees), 2023. https://www.sba.gov/document/support-table-size-standards
5. U.S. Bureau of Labor Statistics, "Employment and Earnings" (motor-vehicle metal stamping ~84,400 payroll jobs, November 2024), 2024. https://www.bls.gov/ces/data/employment-and-earnings/2024/table1b_202412.htm
6. Magna International, 2025 Annual Report (Body Exteriors & Structures $16.618B sales, $1.347B adjusted EBIT, 8.1% margin), 2026. https://www.sec.gov/Archives/edgar/data/749098/000110465926036223/tm2530886d7_ex99-1.pdf
7. Martinrea International, Q4 2025 Press Release (5.6% adjusted operating margin, customer recoveries), 2026. https://www.martinrea.com/wp-content/uploads/Q4-2025-Press-Release-March-5-2026.pdf
8. Gestamp, "Gestamp reports revenues of €11.3 billion in a challenging market environment in 2025" (€1.3B EBITDA, revenue down 5.4%), 2026. https://www.gestamp.com/Media/News/Press-Releases/2026/Gestamp-reports-revenues-of-%E2%82%AC11-3-billion-in-a-challenging-market-environment-in-2025
9. Market Research Future, "Automotive Stamping Market — Major Players" (Gestamp, voestalpine profiles), 2025. https://www.marketresearchfuture.com/reports/automotive-stamping-market/companies
10. Magna International, SEC Form 40-F Annual Filing (competitor list, material pass-through, customer concentration, insourcing risk), 2026. https://www.sec.gov/Archives/edgar/data/749098/000119312526128771/d20215dex991.htm
11. Mikrostyk, "How do fluctuations in steel and aluminum prices affect sheet-metal stamping costs" (metal >60% of stamping cost), 2026. https://mikrostyk.pl/en/how-do-fluctuations-in-steel-and-aluminum-prices-affect-sheet-metal-stamping-costs-in-2026/
12. Shao-Yi, "Cost of Automotive Stamping Dies: Budgeting for Progressive Tooling" (progressive dies $15K–$60K+; large transfer dies >$1M; economic volume thresholds), 2025. https://www.shao-yi.com/cost-of-automotive-stamping-dies
13. NADA (National Automobile Dealers Association), "Market Beat: New Light-Vehicle SAAR 15.9M in April 2026; 2025 sales ~15.3M; Cox Auto 2026 SAAR ~15.8M," 2026. https://www.nada.org/nada/nada-headlines/nada-market-beat-new-light-vehicle-saar-hits-159-million-units-april-2026
14. American Automotive Policy Council, "2025 State of the U.S. Automotive Industry" (U.S. plants produced ~10.4M vehicles in 2024), 2025. https://americanautomakers.org/sites/default/files/2025%20AAPC%20Economic%20Contribution%20Report_1.pdf
15. U.S. Department of Energy, "Short-Term Lightweight Materials Research: Advanced High-Strength Steel and Aluminum" (AHSS up to 25% component weight reduction; substitution 10–60%), 2025. https://www.energy.gov/cmei/vehicles/short-term-lightweight-materials-research-advanced-high-strength-steel-and-aluminum
16. Transport & Environment, "Cleaning up steel in cars: why and how?" (average steel content ~35% of weight in 2020 to ~17% by 2050 for BEVs), 2023. https://www.transportenvironment.org/articles/cleaning-up-steel-in-cars-why-and-how
17. U.S. Energy Information Administration, "Today in Energy" (EV/hybrid share ~22% of U.S. light-duty sales in 2025, up from 20% in 2024), 2026. https://www.eia.gov/todayinenergy/detail.php?id=67144
18. BDO / Congressional Research Service, "Section 232 Tariffs on Steel and Aluminum Doubled to 50% (June 2025); 25% auto-parts tariff (May 2025) with domestic-assembly offsets and USMCA exemption," 2025. https://www.bdo.com/insights/tax/section-232-tariffs-on-steel-and-aluminum-doubled-and-related-developments
19. White House, "Amendments to Adjusting Imports of Automobiles and Automobile Parts into the United States" (offset credit 3.75% through April 2026, 2.5% through April 2027), 2025. https://www.whitehouse.gov/presidential-actions/2025/04/amendments-to-adjusting-imports-of-automobiles-and-automobile-parts-into-the-united-states/
20. Holland & Knight, "Industry Stakeholders Discuss State of USMCA at USTR Hearing; July 2026 review — administration declined to extend USMCA in current form," 2025–2026. https://www.hklaw.com/en/insights/publications/2025/12/industry-stakeholders-discuss-state-of-usmca-at-ustr-hearing
21. U.S. Occupational Safety and Health Administration, "Mechanical Power Presses Standard 1910.217," 2024. https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.217
22. U.S. Environmental Protection Agency, "Surface Coating of Miscellaneous Metal Parts and Products — National Emission Standards for Hazardous Air Pollutants; Metal Finishing Effluent Guidelines," 2024. https://www.epa.gov/stationary-sources-air-pollution/surface-coating-miscellaneous-metal-parts-and-products-national
23. GM Insights, "Automotive Steel Stamping Market" (top 7 suppliers — Gestamp, Magna, Martinrea, Benteler, Kirchhoff, Autokiniton, voestalpine — ~28% of the market in 2025), 2025. https://www.gminsights.com/industry-analysis/automotive-steel-stamping-market
24. PR Newswire / KPS Capital Partners, "Autokiniton Global Group to Acquire Tower International for $31 Per Share; completed Sept. 30, 2019" (Tower ~$1.6B revenue, ~5,700 employees; No. 2 BIW/frame supplier in North America), 2019. https://www.kpsfund.com/docs/default-source/newsandpressreleases/tower-tombstone-%2809-26-19%29-v-2.pdf?sfvrsn=7ffb9a5a_2
25. Bloomberg Law / Nasdaq, "Shiloh Industries' $218 Million Bankruptcy Sale to Grouper Holdings (MiddleGround Capital); ~$400M total consideration," 2020. https://www.nasdaq.com/press-release/shiloh-industries-inc.-to-proceed-with-sale-to-grouper-holdings-llc-a-subsidiary-of
26. Magna International, "Body-in-White Solutions" (body-structure technology, gigastamping response), 2025. https://www.magna.com/products/body-chassis/body-in-white-solutions
27. Gestamp, "Gestamp presents its latest innovations and technologies at IZB" (large-format stamping), 2024. https://www.gestamp.com/Media/Press/Press-Releases/2024/Gestamp-presents-its-latest-innovations-and-technologies-at-IZB
28. U.S. Bureau of Labor Statistics / FRED, "Industry Productivity: Real Sectoral Output for NAICS 336370" (–20.2% in 2008, –29.7% in 2009, +43.7% in 2010, –14.7% in 2020), 2025. https://fred.stlouisfed.org/data/IPUEN33637T011000000
29. U.S. Bureau of Labor Statistics, "Census of Fatal Occupational Injuries, Table A-1" (3 fatalities in motor-vehicle metal stamping, 2024), 2025. https://www.bls.gov/iif/fatal-injuries-tables/fatal-occupational-injuries-table-a-1-2024.htm
30. U.S. Bureau of Labor Statistics, "Industry Injury and Illness Rates" (3.5 total recordable cases per 100 workers in motor-vehicle metal stamping, 2024), 2025. https://www.bls.gov/web/osh/table-1-industry-rates-national.htm