What A.M. Castle & Co does

A.M. Castle & Co. is a specialty metals distributor and value-added processor founded in 1890 and headquartered in Oak Brook, Illinois. The company supplies stainless steel, aluminum, titanium, nickel alloys, carbon steel, and alloy steel in bar, plate, sheet, coil, strip, tubing, and structural forms to OEM end-users in aerospace, defense, space, industrial manufacturing, and medical device industries. Operations are organized across eight specialized divisions — Castle Metals Aerospace, Castle Metals Industrial, Supra Alloys, Banner Commercial, Banner Medical, Banner P&M Supply, Edge International, and National Kwikmetal Service (NKS) — supported by more than 30 processing and stocking facilities across North America, Europe, Asia, and Africa, and an inventory exceeding 70,000 SKUs.

The core technology stack is physical rather than digital: precision value-added processing capabilities including centerless grinding, precision cutting, machining, heat treating, forging, chemical milling, waterjet cutting, laser cutting, and non-destructive testing, with certifications including AS9100D, AS9120B, ISO 9001, ISO 13485, NADCAP, ABS, and BV. The technology differentiators are accuracy and tolerance specifications (e.g., centerless grinding to ±0.0002" on certain medical-grade dimensions), chemical milling for aerospace weight reduction, and medical-grade processing (ISO 13485 compliant titanium, stainless steel, and cobalt-chrome for surgical instruments, implants, and surgical robotics).

The business model is industrial B2B distribution with a services overlay. Revenue is generated through one-time transaction-based sales of physical metal inventory and separately or bundled value-added processing services, with all pricing conducted on a quote basis (no public pricing). The go-to-market is enterprise field sales with dedicated regional teams, division-specific sales organizations targeting each vertical, and a "Request a Quote" website lead capture mechanism, supplemented by an Expressway same-day/next-day shipment channel from Paramount, California. Customers are OEM end-users — aerospace manufacturers, defense contractors, spacecraft makers, heavy equipment and industrial motor producers, data center operators, robotics manufacturers, oil & gas companies, agricultural equipment makers, medical device OEMs (orthopedic, spine, dental, surgical instruments) — acquired and retained through certified supply chain qualifications, breadth of inventory, and precision processing capability. The company was acquired by MiddleGround Capital in May 2023, merged with Banner Industries in late 2023, and unified under the A.M. Castle & Co. brand in January 2025.

Name

A.M. Castle & Co

Legal name

A. M. Castle & Co.

Website

https://amcastle.com

Company type

Private

Founded year

1890

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

A.M. Castle & Co. is a 130+ year-old specialty metals distributor and precision value-added processor operating across 30+ global facilities, supplying stainless steel, aluminum, titanium, nickel and other alloys to aerospace, industrial, and medical device OEMs through eight specialized divisions.

Ownership category

akta.pro rank

Product category

Specialty Metals Distribution

NAICS

Metal Service Centers and Other Metal Merchant Wholesalers (423510)

SIC

Wholesale-Metals Service Centers & Offices (5051)

akta.pro primary industry

Automotive, Tools & Industrial Supplies (B2B) (CRAEAEAH)

Keywords

• Specialty metals distribution
• Metal processing services
• Aerospace metal supply
• Medical-grade alloys
• Industrial metal supply

Headquarters

HQ city

Saybrook

HQ country

United States

HQ region

North America

Offices26 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Metal Product Distribution: One-time transaction-based sales of metal products (stainless steel, aluminum, titanium, nickel alloys, carbon steel, alloy steel) in various forms including bar, plate, sheet, coil, strip, tubing, and structural shapes. Revenue generated from sale of raw materials to OEM end-users.
2. Value-Added Processing Services: Precision processing services including cutting, machining, grinding, heat treating, forging, and testing that add value to raw metal products. Services are charged separately or bundled with product sales, supporting customer supply chain efficiency.
3. Discounted/Limited-Time Inventory: Sale of discounted metal inventory at reduced prices, offered on a limited-time basis while inventory lasts. Provides immediate shipment options for customers with urgent needs.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

A.M. Castle & Co. is a specialty metals service center that distributes stainless steel, aluminum, titanium, nickel alloys, carbon steel, and alloy steel in bar, plate, sheet, coil, strip, tubing, and structural forms to OEM end-users. The company bundles its 70,000+ SKU inventory with precision value-added processing services including cutting, machining, centerless grinding, heat treating, forging, chemical milling, and non-destructive testing. Customers in aerospace, industrial, and medical sectors receive turnkey supply chain programs backed by AS9100D, AS9120B, ISO 9001, ISO 13485, and NADCAP certifications.

Product overview

A.M. Castle & Co. is a specialty metals distributor offering a comprehensive portfolio of products and services organized across three market verticals: Aerospace, Industrial, and Medical. The company operates through eight specialized divisions including Castle Metals Aerospace, Castle Metals Industrial, Supra Alloys, Banner Commercial, Banner Medical, Banner P&M Supply, Edge International, and National Kwikmetal Service (NKS). These divisions collectively provide stainless steel, aluminum, titanium, nickel alloys, carbon steel, and alloy steel in various forms (bar, plate, sheet, coil, tube, structural) supported by value-added processing services such as precision cutting, machining, centerless grinding, heat treating, and non-destructive testing. The company serves aerospace, defense, industrial manufacturing, medical device, and related OEM end-users through over 30 global locations across North America, Europe, Asia, and Africa.

Differentiator

Problem solved

Functional benefit

Brands

• A. M. Castle & Co. APAC: Asia-Pacific division serving industrial sector with specialty metals and supply chain solutions
• A. M. Castle & Co. Canada
• A. M. Castle & Co. EMEA
• A. M. Castle & Co. Mexico
• A. M. Castle & Co. USA
• A. M. Castle Expressway

Products and services

• Castle Metals Aerospace Specialty metals distribution and processing for aerospace, space, and defense OEMs, providing aluminum, nickel alloys, stainless steel, and titanium with precision cutting, machining, and supply chain solutions under AS9100D certification.
• Castle Metals Industrial Distribution of carbon steel, alloy steel, stainless steel, and aluminum with precision bar processing and supply chain solutions for industrial OEMs in machine tool, heavy equipment, power generation, defense, and mining.
• Supra Alloys Aerospace-grade titanium and high-temperature alloys specialist providing bar, coil, plate, sheet, and strip with AS9100D certification for mission-critical aerospace applications from Paramount, CA.
• Banner Commercial Distributor of precision ground metal bar products including carbon steel, stainless steel, brass, aluminum, titanium, and exotic grades for aerospace, automotive, pump manufacturing, and precision machine shops.
• Banner Medical Innovations Supplier of medical-grade stainless steel, titanium, cobalt chrome, and cannulated products for orthopedic, spine, surgical instruments, extremities, and dental applications, certified to ISO 9001 and ISO 13485.
• Banner P&M Supply Cold-finished steel bars specialist focused on Pump Shaft Quality (PSQ) materials with diameter range of 1 to 3-7/16 inches, serving industrial pump and motor applications.
• Edge International Medical-grade materials supplier providing cobalt alloys, stainless steel, and titanium for orthopedic, spine, and trauma applications, with ISO 13485 certification, headquartered in Warsaw, Indiana.
• National Kwikmetal Service (NKS) Stainless steel coil supplier offering slit coil services and cut-to-length capabilities with finishes including 2B, 2D, bright annealed, No.3, and No.4, based in Des Plaines, Illinois.
• A.M. Castle Expressway (Same Day/Next Day Shipments) Same-day and next-day expedited metal shipment program from the Paramount, CA Supra Alloys facility, available for qualifying pull-pack-ship orders and processing jobs of 25 pieces or fewer received by 12:00 PM.

Quantifiable outcome

• Precision processing reduces machining time and improves surface finish for customers
• +2 more outcomes

Named customers17 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators6 records

Recent moves9 records

Expansion highlights6 records

Broad incumbents

• Carpenter Technology Corporation: Specialty alloy producer and distributor (titanium, nickel, cobalt alloys) serving aerospace, medical, and energy markets. Comparable to A.M. Castle's Supra Alloys and Edge International divisions, though Carpenter is a mill/producer rather than a service center and operates at a different vertical layer.
• Haynes International, Inc. Manufacturer and distributor of high-performance nickel- and cobalt-based alloys for aerospace, chemical processing, and industrial markets. Comparable to A.M. Castle's specialty alloy distribution and processing capabilities in high-temperature aerospace alloys.
• thyssenkrupp Materials Services: Global materials distribution and service organization within thyssenkrupp, supplying carbon steel, stainless, aluminum, copper and engineered plastics with extensive processing capabilities. Comparable to A.M. Castle's distribution-plus-processing model across Europe and North America, with substantially larger scale.
• Reliance Steel & Aluminum Co. The largest U.S. metals service center operator with broad carbon, stainless, aluminum and specialty product lines across aerospace, industrial and other end markets. Comparable to A.M. Castle as a direct competitor in metal distribution and processing, but operating at materially larger scale with a much wider product set and broader geographic footprint.

Direct peers

• Worthington Enterprises, Inc. Processes flat-rolled steel and other metals through pressure cylinder and consumer products businesses, with a steel processing arm supplying OEM customers. Comparable to A.M. Castle's flat-rolled and processed steel offerings for industrial end users.
• Olympic Steel, Inc. Mid-size U.S. metals service center offering carbon, stainless, and aluminum flat-rolled products plus processing services to industrial and OEM customers. Directly comparable to A.M. Castle's industrial business line as a metals service center serving similar end markets with value-added processing.
• Kloeckner Metals Corporation: European-headquartered metals service center and processor with North American operations distributing carbon steel, stainless, aluminum and specialty products. Comparable to A.M. Castle in metals distribution plus value-added processing, with stronger European footprint.
• EMJ (Earle M. Jorgensen / Bralco Metals): Specialty metals distributor of bar, tube, plate and sheet products with value-added processing for aerospace, medical, and industrial OEM customers. Closely comparable to A.M. Castle's aerospace and medical specialty bar/tube processing business (Supra Alloys, Banner Medical).
• Ryerson Holding Corporation: U.S. metals service center and processor serving aerospace, industrial, and OEM customers with stainless, aluminum, carbon and alloy steel plus value-added processing. Closely comparable to A.M. Castle in product mix, processing capabilities, customer base, and value-added service model, and is one of its primary direct competitors.

Regional players

• Triple-S Steel Holdings, Inc. Privately held U.S. metals service center primarily serving the southwestern and southern U.S. with carbon steel, structural, and processed products. Comparable to A.M. Castle's industrial distribution and processing business, though with a narrower geographic and product footprint.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat6 records

Key risks2 records

Key highlights6 records

Customer concentration

• Xx.com/CastleMetals
• Facebookfacebook.com/CastleMetals1890
• LinkedInlinkedin.com/company/castle-metals

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Subsidiaries8 records

Funding overview

Funding rounds

Investors

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

M&A4 records

Investments

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

Frequently asked questions about A.M. Castle & Co