The largest 钣金加工 companies in the USA in 2026 — by independently verifiable revenue and footprint — are Mayville Engineering Company (MEC), Cadrex Manufacturing Solutions, BTD Manufacturing, O’Neal Manufacturing Services (OMS), Maysteel, and Anchor Fabrication. MEC and Cadrex alone are the two largest contract fabricators tracked by The Fabricator magazine’s 2026 FAB 40, together topping $1 billion in combined annual sales. But “largest” isn’t the same as “right for your part.” A high-volume OEM program, a precision enclosure run, and a 10-piece prototype batch each need a different kind of shop.
This guide profiles six established custom sheet metal fabrication companies, sourced wherever possible to SEC filings, official company disclosures, and The Fabricator‘s FAB 40 — the industry’s most widely cited ranking of U.S. contract metal fabricators. Then it gives you a working framework for matching a fabricator to your project instead of just picking the biggest name on the list.
How This List Was Built
Every figure below is sourced to one of three places: a public company’s SEC filings, a fabricator’s own current corporate disclosures (about/contact pages, press releases), or The Fabricator magazine’s FAB 40, which ranks contract metal fabricators annually based on reported revenue. Where a company is privately held and a number can’t be independently verified, we say so rather than repeating an unsourced figure that’s circulated across other industry blogs.
A quick definition for anyone landing here from a general search: 钣金加工 is the process of making parts from flat metal stock through cutting, bending, punching, welding, and finishing. Typical outputs are enclosures, brackets, chassis, cabinets, and structural assemblies — distinct from forming or stamping, which are individual steps inside that larger process.
The U.S. sheet metal fabrication market is mature and concentrated in the Midwest, California, Texas, and the East Coast, serving electronics, automotive, aerospace, medical, and industrial customers, according to industry analysis.
Mayville Engineering Company (MEC)
Founded in 1945 and headquartered in Mayville, Wisconsin, MEC is publicly traded (NYSE: MEC) and is the largest contract fabricator on this list by reported revenue. The company posted $546.5 million in revenue for fiscal year 2025, per its SEC filings, down from $581.6 million in 2024 amid softer demand in commercial vehicle and construction end markets. MEC operates more than 20 facilities with roughly 2,200 employees, fabricating tubes, pipe, sheet metal, and plate for construction, transportation, military, marine, and recreation customers. It ranked first on The Fabricator’s 2026 FAB 40.
Best for: large OEMs that need high-volume, multi-process fabrication at national scale, with the transparency that comes from a publicly traded company’s quarterly disclosures.
Cadrex Manufacturing Solutions
Cadrex isn’t an old-line single fabricator — it’s a roll-up. Backed by CORE Industrial Partners, the brand was formed in 2021 by acquiring and integrating more than ten manufacturing companies, starting with CGI Automated Manufacturing, with additional acquisitions including Tenere and D&R Machine Company through 2023. As of its current corporate disclosures, Cadrex operates 20 facilities across nine U.S. states plus Mexico, headquartered in Romeoville, Illinois. It ranked second on The Fabricator’s 2026 FAB 40, behind only MEC. Cadrex serves information and communication technology, warehouse automation and robotics, kiosk and gaming, aerospace and defense, renewable energy, and medical customers.
Best for: programs that need multi-site capacity and the ability to scale from concept to high volume across several integrated former fabricators operating under one umbrella.
BTD Manufacturing
BTD started in 1979 as Bismarck Tool & Die and is headquartered in Detroit Lakes, Minnesota, with additional facilities in Lakeville, Minnesota; Washington, Illinois; and Dawsonville, Georgia. The company reports 1,100-plus employees across those locations. BTD is a wholly owned subsidiary of Otter Tail Corporation, which trades publicly on NASDAQ (OTTR) — meaning BTD’s financial performance ultimately rolls up into a public company’s audited filings, a level of transparency most private fabricators don’t offer. Beyond sheet metal fabrication, BTD runs metal forming, welding, precision machining, painting, and assembly in-house.
Best for: OEM programs that want fabrication, machining, and finishing handled under one roof, backed by a publicly accountable parent company.
O’Neal Manufacturing Services (OMS)
OMS is the contract fabrication arm of O’Neal Industries, a family-owned metals group with more than a century in the industry. OMS ranked No. 4 on The Fabricator‘s FAB 40 list based on 2023 reported revenue — one of the highest placements of any family-owned fabricator on the list. It specializes in multistage processing and repetitive parts production for large OEMs, and its parent company’s metals distribution business gives it direct raw-material sourcing advantages that most independent fabricators don’t have.
Best for: high-volume, repeat-part production where consistency across years and large order quantities is the priority.
Maysteel
Maysteel has manufactured sheet metal products since 1936. Its specialty is enclosures: custom OEM enclosures, kiosks, cabinets, server racks, and electrical housings for utility, energy, telecom, and EV charging infrastructure customers. The company operates from five North American locations and ranked No. 12 on The Fabricator‘s 2024 FAB 40 list.
Best for: enclosure and cabinet programs, particularly for utility, telecom, energy, and EV charging applications where a specialist beats a generalist.
Anchor Fabrication
Anchor handles light, medium, and heavy fabrication — laser cutting through welding, machining, powder coating, and final assembly — with a strong footprint in the South and Central U.S. Its core markets are rail, oil and gas, defense, heavy truck, and logistics equipment. Note: Anchor’s specific facility square footage is reported by third-party industry directories rather than Anchor’s own current disclosures; we weren’t able to independently verify the figure, so we’re not repeating it here as fact.
Best for: heavy and large-format fabrication runs in industrial and transportation markets.
How to Choose a Sheet Metal Fabrication Company
Work through these five questions before you send drawings to anyone:
- What volume do you actually need? High-volume repeat parts favor a large production fabricator like OMS or MEC. Prototypes and low-to-mid volumes favor a quick-turn shop built for fast iteration, not a 20-facility OEM supplier that needs a minimum order to make sense of your job.
- What is the part, specifically? Enclosures and cabinets point toward a specialist like Maysteel. Heavy structural work points toward Anchor. Mixed fabrication-plus-machining points toward a one-stop shop like BTD.
- Which certifications does your industry actually require? Aerospace and defense work needs AS9100. Medical device work often needs ISO 13485. Confirm the shop holds the certification your industry requires — not just “ISO 9001” generically — before you request a quote.
- Do you need finishing and assembly in-house? A fabricator that also welds, machines, powder coats, and assembles reduces handoffs, shipping legs, and lead time. Every handoff between vendors is a place a schedule can slip.
- What is the total landed cost — not just the per-part quote? Compare the all-in number, including finishing, shipping, and any rework, across every bid. The lowest per-part fabrication quote isn’t always the lowest total cost.
XY加工的应用场景
To be direct about it again: XY Machining publishes this guide, so this section is our own positioning, not a neutral ranking. We’re a smaller, engineer-led shop, not a 20-facility national fabricator, and we’re not trying to be.
XY Machining works with engineering teams on custom sheet metal fabrication, including laser cutting and metal bending, alongside CNC machining, 注塑成型, and 3D打印 — which lets us combine fabricated, machined, and molded parts in one program instead of splitting your BOM across vendors. We focus on fast DFM 反馈 and prototype-to-production support for teams that don’t have a 10,000-unit order ready yet. If you want to compare us against a domestic high-volume fabricator on total landed cost for a specific part, we’re glad to quote it head-to-head.
常见问题解答
Who is the largest sheet metal fabrication company in the USA?
Mayville Engineering Company (MEC) is the largest U.S. contract sheet metal fabricator by reported revenue, posting $546.5 million in fiscal year 2025 per its SEC filings, and ranking first on The Fabricator’s 2026 FAB 40 list.
What does a sheet metal fabrication company do?
A sheet metal fabricator turns flat metal stock into finished parts using processes like laser cutting, CNC punching, bending, welding, and finishing. Typical outputs include enclosures, brackets, chassis, cabinets, and structural components.
How do I choose a sheet metal fabrication company?
Match the shop to the job: a large production fabricator for high-volume repeat parts, an enclosure specialist for cabinets and housings, and a quick-turn shop for prototypes and low volumes. Then confirm certifications, in-house finishing capability, and total landed cost before committing to one supplier.
Where are most U.S. sheet metal fabricators located?
U.S. sheet metal fabricators concentrate in the Midwest, California, Texas, and the East Coast, serving electronics, automotive, aerospace, medical, and industrial manufacturing customers, per industry analysis.
What’s the difference between sheet metal fabrication and forming?
Fabrication is the full process of turning flat sheet into a finished part: cutting, bending, welding, and finishing. Forming refers specifically to the bending and shaping steps within that process, such as press-brake bending and stamping.
What is the FAB 40 list?
The FAB 40 is The Fabricator magazine’s annual ranking of the largest custom and contract metal fabricators in the U.S., based on companies’ self-reported prior-year revenue. Because most fabricators on the list are privately held, the publisher notes that independent verification of every reported figure isn’t possible — which is why we’ve cross-checked figures against SEC filings wherever a company is public or has a public parent.
