Great Lakes Castings

What Great Lakes Castings does

Great Lakes Castings, LLC is a privately held iron foundry founded in 1945 and headquartered in Ludington, Michigan. The company designs and manufactures custom gray iron and ductile iron castings for industrial customers across automotive, agriculture, construction, heavy equipment, HVAC, and energy end-markets. Named customers include BorgWarner, Parker Hannifin, Ingersoll Rand, Rexnord, Permco, Cloyes, Armstrong, and Ay McDonald. Revenue is generated through quote-based, custom orders priced on specifications, quantities, metallic/melt surcharges, and setup charges, with a 30-day quote validity.

The company operates a 160,000 sq ft main foundry on 26 acres in Ludington, supplemented by a 26,500 sq ft expansion housing a 2013B Disamatic vertical molding line, plus a separate finishing facility in Holland, Michigan established in 2004. Production runs across six advanced molding lines: five matchplate lines (Hunter, DISA Match, Sinto) for moderate volume and the Disamatic for high volume. Supporting capabilities include in-house tooling design with CAD/CAM and MAGMA casting simulation, two pattern shops, CMM-based dimensional layout and PPAP validation, in-house annealing (two belt-type heat treat furnaces), and automated finishing (Barrinder and Maus grinders, AFS trim presses). End-to-end supply chain management is offered by coordinating ISO-certified machining, coating, and painting partners.

The go-to-market is sales-led and event-driven, with direct enterprise engagement through Director of Sales & Marketing Jeff Miller and Account Manager Kristi Williams, complemented by annual presence at the AFS Metalcasting Congress in Grand Rapids, Michigan. The company holds IATF 16949:2016 and ISO 9001:2015 certifications at both Ludington and Holland, and was awarded the 2023 Business Clean Energy Program Award. Recent strategic activity includes a full senior leadership refresh between 2023 and 2025 (CEO Rob McMahon, CFO Steve Case, Director of Sales Jeff Miller, Director of Operations John Smeltzer), the in-house launch of ductile iron production in 2025, and dual-site recertification in 2025.

Name

Great Lakes Castings

Legal name

Great Lakes Castings, LLC

Website

https://greatlakescastings.com

Company type

Private

Founded year

1945

Operating status

Operating

Headcount range

11–50 employees

Short description

Great Lakes Castings, LLC is a privately held iron foundry in Ludington, Michigan that designs and manufactures custom gray and ductile iron castings for automotive, agricultural, construction, heavy equipment, and industrial OEM customers, operating six molding lines and two finishing facilities.

Ownership category

akta.pro rank

Headquarters

HQ city

Ludington

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. Custom Iron Castings Manufacturing: Design and manufacture of custom gray iron and ductile iron castings for various industries. Revenue is generated through direct sales of manufactured castings with pricing based on specifications, quantities, material costs (including metallic/melt surcharges), and setup charges.
2. Value-Added Services: Additional revenue from surface treatments, machining, heat treatment, and coatings performed through managed supplier relationships. The company coordinates these services under single-source supply chain management.
3. Tooling Design and Pattern Making: Custom tooling design services using CAD/CAM technology for pattern creation and tooling optimization. Tooling may be customer-owned or company-managed.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels5 records

Core offering

Great Lakes Castings is a US foundry that designs and manufactures custom gray iron and ductile iron castings for industrial OEMs across automotive, agriculture, construction, heavy equipment, and HVAC markets. The company operates six advanced matchplate and Disamatic molding lines, complemented by in-house tooling design, pattern making, automated finishing, heat treatment, dimensional inspection, and supply chain management services that deliver finished, ready-to-use components.

Product overview

Great Lakes Castings operates as a foundry offering gray iron and ductile iron castings, with a portfolio of complementary manufacturing services. The core products are Gray Iron Castings and Ductile Iron Castings, supported by Precision Casting Services utilizing advanced molding technology. The service ecosystem includes Tooling Design Services (CAD/CAM and MAGMA simulation), Pattern Shop Services (two internal shops), Dimensional Layout & Design (CMM and scanning), Automated Finishing Services (grinding), In-House Annealing (heat treatment), Supply Chain Management Services, and Tooling Transfer Services. These services work together to deliver finished components from raw casting through final inspection.

Differentiator

Problem solved

Functional benefit

Products and services

• Gray Iron Castings High-quality gray iron castings manufactured for automotive, machinery, construction, and hydraulic applications, offering vibration damping, thermal conductivity, and wear resistance.
• Ductile Iron Castings Ductile iron castings with spherical graphite structure providing tensile strength, impact resistance, and ductility for high-stress applications in automotive, heavy equipment, and industrial machinery.
• Precision Casting Services Precision iron casting services using six advanced molding lines (Hunter, DISA Match, Sinto, and 2013B Disamatic vertical molding) to produce consistent castings with tight tolerances for moderate to high-volume runs.
• Tooling Design Services Custom tooling design leveraging CAD/CAM software and MAGMA casting simulation to optimize gating and risering, enhance mold stability, and minimize material waste. Includes 3D scanning capability to rebuild existing parts.
• Pattern Shop Services Internal pattern making across two fully equipped pattern shops producing durable, precise patterns using modern machinery for both standard gating and complex project requirements.
• Dimensional Layout & Design Services Precision measurement and quality validation using coordinate measuring machines (CMMs), digital scanners, and CAD/CAM software to provide PPAP submissions, tight tolerance validation, and ongoing quality checks.
• Automated Finishing Services Precision flash and gate removal at the GLC Holland finishing facility using Barrinder and Maus Automated Grinders and AFS Trim Presses to deliver uniformly finished castings minimizing variation and secondary operations.
• In-House Annealing Services Heat treatment services using two belt-type heat treat furnaces for controlled annealing to enhance machinability and structural properties of castings, extending component life.
• Supply Chain Management Services End-to-end supply chain management coordinating external machining, coating, painting, and logistics through audited ISO-certified partner facilities to deliver finished, ready-to-use components.
• Tooling Transfer Services Tooling transfer and requalification process including incoming inspection, compatibility review, CAD-to-casting validation, fit checks, first article inspections, and engineering collaboration to optimize quality and repeatability.

Quantifiable outcome

• Supplier scorecard excellence in Quality, Delivery, Cost Competitiveness and Engineering Support over 35+ year relationships

Named customers12 records

Segments6 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

One partnership is on record.

• ISO-Certified Machining PartnerscoreOthersNetwork of fully established, ISO-certified machining facilities that Great Lakes Castings manages as part of its supply chain services. These partners undergo regular audits for quality and lead-time standards. The company selects partners based on quality, capacity, and alignment with customer goals.

Scale indicators4 records

Recent moves9 records

Expansion highlights5 records

Direct peers

• Waupaca Foundry: One of the largest iron foundries in North America producing gray and ductile iron castings for automotive and industrial markets. Directly comparable business model (high-volume iron casting), end-customer overlap, and similar matchplate/Disamatic technology base — but at significantly greater scale.
• Neenah Foundry (Grede Holdings): Long-established U.S. iron foundry producing gray and ductile iron castings for heavy equipment, municipal, and industrial OEMs. Direct peer on product (iron castings), customer profile, and casting-process methodology, though materially larger than Great Lakes Castings.
• Donsco, Inc. Iron and aluminum foundry producing green sand and no-bake castings. Direct competitor in iron casting processes; specifically relevant because GLC's new Director of Operations (John Smeltzer) joined from Donsco in October 2025.
• East Jordan Iron Works: Michigan-based iron foundry producing gray and ductile castings for infrastructure, waterworks, and industrial markets. Direct geographic and product peer, sharing both the Michigan footprint and the municipal/infrastructure customer base.
• Dotson Iron Castings: U.S. iron foundry producing gray and ductile iron castings for agricultural, construction, and heavy equipment OEMs. Direct peer on product, end markets, and customer overlap with GLC's Agriculture and Construction segments.
• Cadillac Castings, Inc. Michigan-based iron foundry serving automotive, heavy truck, and industrial customers. Directly comparable on geography (shared Michigan base), product mix (gray/ductile iron castings), and automotive customer base.
• Benton Foundry: Family-owned iron foundry producing gray and ductile iron castings across a similar size band. Comparable on casting technology (matchplate/flask molding), quality certifications, and industrial/automotive customer mix.

Broad incumbents

• Citation Corporation (Grede): Large diversified iron casting platform serving automotive, commercial vehicle, and industrial markets. Broader incumbent with multiple facilities and a wider portfolio than GLC's single-site focus.

Emerging players

• Stainless Foundry & Engineering: Specialty foundry producing iron and steel castings for industrial customers. Comparable as a custom/craft iron foundry serving engineered industrial applications, though with more emphasis on steel/heat-resistant alloys.

Others

• Vulcan Engineering: Supplier of foundry equipment, molding lines, and turnkey foundry solutions. Adjacent ecosystem participant (rather than a competitor) — comparable because GLC operates comparable Vulcan-class molding and finishing systems and Vulcan represents the equipment-vendor relationship type relevant to GLC's capital-base decisions.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/great-lakes-castings-llc

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Great Lakes Castings