What Spartan Light Metal Products makes

Spartan Light Metal Products is a high-pressure die caster of aluminum and magnesium components for the automotive and commercial vehicle industries. The company specializes in thin-wall structural and powertrain parts, the kind of work where reducing weight without giving up strength is the whole point. Its catalog spans oil sumps, head covers, battery cases, engine components, and complex structural castings, delivered as raw castings or fully machined, assembled, and validated assemblies.

Spartan has a long record in light-metal metallurgy. It developed the B390 wear-resistant aluminum alloy in the 1970s and became the first company in North America to offer commercial magnesium die-cast products in 1978. In 2004 it secured an exclusive license to NASA's MSFC-398.1 aluminum-silicon alloy, a low-creep, high-temperature material developed at Marshall Space Flight Center. That materials focus, creep-resistant magnesium for hot applications and hypereutectic aluminum for high-wear ones, is what a die caster brings to an OEM beyond raw press tonnage. Value-added services include heat treating, machining, assembly, design and engineering support, and testing and validation.

The company runs high-pressure die casting up to 4,100 tons, machinery large enough for the structural castings automakers now use to consolidate what used to be many stamped and welded pieces into a single part. Spartan supplies most primary OEMs and Tier 1 suppliers across the United States, and it runs an engineering liaison office in Tokyo to support Japanese customers like Honda and Toyota.

Ownership and history

Henry A. Jubel founded Spartan in Sparta, Illinois, in 1961, and that first foundry is still one of the company's operating plants. Spartan remains privately held and family-founded, and its leadership publicly credits the servant-leadership principles Jubel instilled. The Henry A. Jubel Foundation, tied to the founding family, is still active.

Over six decades Spartan grew from a single Illinois foundry into a five-site operation. Today it runs manufacturing plants in Sparta, Illinois; Hannibal, Missouri; and two plants in Mexico, Missouri, with a corporate service center in St. Louis and the engineering office in Tokyo. The current leadership team is led by Thomas Messner, who became Chief Executive Officer in 2021 after senior roles at Park-Ohio and Faurecia. Matthew Kato joined as Chief Commercial Officer in 2023 from Pace Industries and Faurecia; Melissa Markwort, a long-tenured Spartan executive, serves as Vice President of Program Management; and Chris Sleath leads engineering as Vice President of Engineering.

Certifications and quality

Spartan reports certification to ISO/TS 16949, the automotive quality-management standard now carried forward as IATF 16949, and to ISO 14001 for environmental management. Direct OEM work also runs on the production part approval process, and certification to the automotive QMS standard is the baseline expectation for it, and Spartan's award history is consistent with a supplier meeting it in practice: it has been named a General Motors Supplier of the Year in multiple years and has repeatedly earned Toyota's Excellent Quality Performance Award. The published certificate dates are not currently accessible, so the certifications are reported here as claimed.

Known customers

Spartan's customer relationships are unusually well documented for a private die caster, because several of its customers publish supplier-award lists.

Volkswagen and Hydro-Gear also appear as customers in trade-press coverage. Toyota recognition has been consistent enough that Spartan's Hannibal, Missouri plant has been cited among a small group of suppliers earning Toyota quality awards for ten consecutive years.

Sourcing evidence

Spartan's US import record reads exactly like a die caster's should: raw metal and alloy in, plus the occasional piece of capital equipment, rather than finished goods for resale. US customs bills of lading show 657 sea shipments between January 2015 and September 2026, with the most recent on September 19, 2026, and 31 shipments in the trailing month, up about 12 percent year over year. Average volume runs about 2.57 TEU per month.

The import mix is telling. By HS chapter it centers on magnesium and articles of magnesium, including waste and scrap (HS 8104), aluminum waste and scrap (HS 7602), and automotive parts such as output shafts and gearbox components (HS 8708), alongside a Frech horizontal cold-chamber die casting machine imported from Germany (HS 8454) that matches the large-tonnage equipment the company runs. Named suppliers skew toward metal and alloy: Allied Magnesium, KMI Korea Magnesium Industrial, Seoul Industrial, Advanced Magnesium Alloys, and Trinity Metals among them.

Origins concentrate in Asia (76 percent of shipments) and Europe (24 percent): South Korea leads by a wide margin at 430 shipments, followed by France (70), Germany (59), Vietnam (48), China (21), and the Netherlands (20). The South Korea concentration lines up with Spartan's magnesium sourcing, since Korean magnesium and alloy suppliers appear repeatedly in the record. For buyers weighing nearshoring and tariff exposure, that overseas raw-material dependence is worth noting: Spartan casts in Missouri and Illinois, but its magnesium supply chain reaches to Korea.

Coverage caveats: these are US ocean-freight records only. Air, truck, and rail movements do not appear; some records name freight intermediaries rather than manufacturers; product categories come from declared manifest codes, which are noisy; and the company imports under several related names and addresses. Absence of a record is not evidence of absence.

Frequently asked questions

What does Spartan Light Metal Products make?

Spartan Light Metal Products is a high-pressure die caster of aluminum and magnesium components for the automotive and commercial vehicle industries. It makes thin-wall structural and powertrain castings, including oil sumps, head covers, battery cases, and engine components, and offers machining, assembly, heat treating, and testing. It was the first company in North America to offer commercial magnesium die-cast products.

Who owns Spartan Light Metal Products?

Spartan is privately held and family-founded. Henry A. Jubel founded the company in Sparta, Illinois, in 1961, and it has remained independent, with no institutional or corporate parent on the public record. Thomas Messner has served as Chief Executive Officer since 2021.

Who are Spartan Light Metal Products' customers?

Spartan supplies major automotive OEMs. Toyota is cited as its largest customer, and the company has been named a General Motors Supplier of the Year in multiple years and has repeatedly won Toyota's Excellent Quality Performance Award. Ford, Honda, Volkswagen, and Hydro-Gear are also cited as customers.

Where is Spartan Light Metal Products located?

Spartan's corporate service center is in St. Louis, Missouri, at 3668 South Geyer Road. It runs manufacturing plants in Sparta, Illinois; Hannibal, Missouri; and two plants in Mexico, Missouri (roughly 289,000 square feet combined), plus an engineering liaison office in Tokyo, Japan.

How many employees does Spartan Light Metal Products have?

Spartan employs roughly 600 people, with third-party estimates placing it in the 500 to 1,000 range. Its Mexico, Missouri operations alone employ more than 300 and are described locally as one of the community's largest employers. The company does not publish an exact figure.

What certifications does Spartan Light Metal Products hold?

Spartan reports certification to ISO/TS 16949, the automotive quality-management standard now carried forward as IATF 16949, and to ISO 14001 for environmental management. Its record of General Motors and Toyota supplier-quality awards is consistent with a supplier meeting automotive QMS requirements in practice.

Last verified September 28, 2026. Is this your company? Request a correction.