Gypsum Supply Company

What Gypsum Supply Company does

Gypsum Supply Company (operating jointly with sister subsidiaries Ryan Building Materials and ASI Building Products as "GSC-Ryan-ASI") is a regional building-materials distributor serving commercial and residential construction customers across Michigan and Northwest Ohio. Founded in 1979 by brothers Roger and Stan Abbott and headquartered in Lansing, MI, the company is a wholly-owned subsidiary of Gypsum Management & Supply, Inc. (GMS), which was itself acquired by SRS Distribution in 2025. GSC-Ryan-ASI operates 13 company-owned warehouse/yard locations — 7 GSC yards, 3 Ryan yards, and 3 ASI yards — distributing more than 40,000 unique building products including drywall, steel framing, insulation, acoustical ceilings, joint treatment, EIFS/exterior finishes, tools, fasteners, and safety products from manufacturers such as USG, ClarkDietrich, CertainTeed, Owens Corning/Thermafiber, Knauf, ROCKWOOL, DuPont, Armstrong, and Senergy/Parex.

The underlying distribution platform pairs the physical yard network with a modern delivery fleet (boom trucks with 70+ foot reach, flatbeds, semi-tractors, portable forklifts, and the only 10-story wallboard crane in Michigan), custom EIFS tinting services at Lansing and Southfield ASI, and a Customer Portal e-commerce system plus a native iOS/Android mobile app for online ordering, quoting, ACH payment, delivery notification, custom product lists, and job/ship-to management. PRO2GO, an enhanced professional e-commerce experience, layers additional SKUs and delivery options on top of the standard portal.

Revenue is generated through unit-priced product sales transacted at yard locations, via the Customer Portal/PRO2GO, and through delivered orders within a 90-mile service radius. The company also charges for value-added services including after-hours and multi-story boom-truck deliveries, stair-carry services for residential drywall, custom EIFS tinting, specialty ordering for non-stock items, and submittal/technical-documentation support for architects and general contractors. Pricing is account-based with job-specific escalators and is not publicly disclosed; customers span commercial builders, residential contractors, and specialty trades with no single named anchor account.

Name

Gypsum Supply Company

Legal name

Gypsum Management & Supply, Inc.

Website

https://gypsum-supply.com

Company type

Private

Founded year

1979

Operating status

Operating

Headcount range

251–500 employees

Short description

Gypsum Supply Company (GSC-Ryan-ASI) is a regional building-materials distributor serving commercial and residential contractors across Michigan and Northwest Ohio through 13 company-owned yards, distributing 40,000+ products and operating a fleet with the only 10-story wallboard crane in Michigan.

Ownership category

akta.pro rank

Product category

Building Materials Distribution

NAICS

Building Material and Supplies Dealers (4441), Building Material and Garden Equipment and Supplies Dealers (444), Other Building Material Dealers (44418)

SIC

Wholesale-Lumber & Other Construction Materials (5030), Concrete, Gypsum & Plaster Products (3270), Wholesale-Lumber, Plywood, Millwork & Wood Panels (5031)

akta.pro primary industry

Gypsum Board & Drywall Panels (IMADAEAA)

akta.pro secondary industries

Ceiling Boards, Plasterboard Tiles & Suspension-Compatible Gypsum Products (IMADAEAM), General Home Improvement & Hardware Stores (CRAIADAA), Gypsum Plasters & Specialty Additives/Modifiers (IMADAEAG)

Keywords

• Building materials distribution
• Drywall products supply
• Construction materials wholesale
• Insulation and steel framing
• Commercial construction supplies

Headquarters

HQ city

Lansing

HQ country

United States

HQ region

North America

Offices13 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Building Materials Distribution: GSC-Ryan-ASI distributes over 40,000 unique building material products to commercial and residential construction customers through 13 yard locations in Michigan and Northwest Ohio. Revenue is generated through product sales at yard locations and delivered to job sites. The company is the largest distributor of drywall products in the United States.
2. Delivery and Logistics Services: Commercial and residential delivery services within 90 miles of yard locations, including boom truck deliveries (multi-story), flatbed, forklift, and after-hours deliveries. Charges apply for stair carry services for residential drywall deliveries.
3. Custom Tinting Services: Custom color tinting for EIFS finishes at select locations for a fee, serving architects, designers, and builders with specialized color matching.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

Gypsum Supply Company (GSC), operating alongside sister brands Ryan Building Materials and ASI Building Products under parent GMS, distributes over 40,000 unique building material products — including drywall, steel framing, insulation, acoustical ceilings, EIFS, joint treatment, tools, fasteners, and safety products — through 13 yard locations across Michigan and Northwest Ohio. The company complements product distribution with commercial and residential delivery services within a 90-mile radius, including specialized boom-truck and forklift deliveries, plus custom EIFS tinting at select yards.

Product overview

Gypsum Supply Company operates as a building materials distribution business under the GMS parent company, offering a comprehensive portfolio of construction products through multiple service channels. The core offering centers on drywall, steel framing, insulation, acoustical ceilings, joint treatment, EIFS, tools, fasteners, and safety products—distributed across 13 physical yard locations in Michigan and Ohio. The company provides two primary digital platforms: the Customer Portal for standard online ordering and account management, and PRO2GO™ for enhanced professional e-commerce with additional products and delivery options. Physical product lines are complemented by services including commercial and residential delivery, custom EIFS tinting, specialty ordering, and submittal support. The company is not a manufacturer; it distributes products from brand partners including CertainTeed, Knauf, Owens Corning, ROCKWOOL, Armstrong, USG, DeWALT, and TapeTech.

Differentiator

Problem solved

Functional benefit

Brands

• PRO2GO: Enhanced e-commerce experience for professionals with additional products, delivery options, and more.

Products and services

• Drywall Products
• Steel Framing Light and heavy gauge steel studs, tracks, headers, jambs, and accessories for commercial and residential construction framing applications, from manufacturers such as ClarkDietrich.
• Insulation Products Batt, rigid foam board, loose-fill, blown-in, mineral wool, spray foam, and specialty insulation distributed from manufacturers including CertainTeed, Knauf, Owens Corning, ROCKWOOL, Thermafiber, DuPont, and Kingspan.
• Acoustical Ceilings Acoustic ceiling tiles and grid systems from Armstrong, CertainTeed, USG, and specialty manufacturers for sound control and aesthetic finishes.
• Joint Treatment & Finishes Joint compounds, tape, beads, trim, plaster, and setting compounds for drywall finishing from brands including Fry Reglet and USG Sheetrock Tools.
• EIFS & Exterior Finishes Exterior Insulation and Finish Systems including base coats, adhesives, finishes, mesh, trims, and stucco products from Senergy and Parex, with custom tinting options available.
• Tools & Equipment Professional construction tools including automatic taping tools, hand tools, power tools, laser leveling, scaffolding, and tool accessories from DeWALT, TapeTech, Marshalltown, and other brands.
• Fasteners Anchors, clips, nails, screws, shots, pins, staples, and tapes for construction fastening applications.
• Safety Products Fall protection, gloves, hard hats, safety apparel, glasses, and general safety supplies including STUDSON, PIP, SHOWA, and 3M branded items.
• FRP (Fiberglass Reinforced Panels) Wall and ceiling panels with trims and adhesives for durable, moisture-resistant surface solutions.
• Lumber Products Dimensional lumber and plywood for construction framing applications.
• Surface Protection Rosin paper, poly sheeting, painter's plastic, carpet protection film, and floor protection products from Trimaco, Grip-Rite, and other brands.
• Customer Portal Online e-commerce platform enabling account customers to place orders, manage accounts, view invoices, track deliveries, access job-specific pricing and escalators, manage custom product lists, and process ACH payments 24/7.
• PRO2GO™ Enhanced e-commerce experience for construction professionals offering additional products, delivery options, and advanced ordering features beyond the standard Customer Portal.
• Mobile App (GSC-Ryan-ASI) Native mobile application for iOS and Android enabling customers to browse products, place orders, and manage accounts from mobile devices.
• Delivery Services Commercial and residential material delivery within 90 miles of yard locations using boom trucks (70+ ft reach), flatbeds, semi-tractors with trailers, portable forklifts, and pickup trucks, with pre- and post-delivery site inspections and after-hours/weekend options. Includes the only 10-story wallboard crane in Michigan for high-rise material delivery.
• Custom Tinting Services Custom color tinting for EIFS products available at Lansing, MI (GSC, Senergy finishes) and Southfield, MI (ASI, Parex finishes) locations, serving architects, designers, and builders with specialized color matching.
• Specialty Ordering Special order capabilities for non-stock items including Fry Reglet aluminum trim, colored ceiling tile, non-stock FRP colors, and specialty tools and fasteners.
• Submittals Support Assistance obtaining submittal documentation from manufacturers including American Gypsum, USG, Armstrong, ClarkDietrich, CertainTeed, and Knauf for project specification compliance.
• Haven Underdeck Systems Ceiling system products supplied locally to builders for underdeck applications, available through special ordering.

Quantifiable outcome

• Delivery service area within 90 miles of all 13 yard locations covering Michigan and Northwest Ohio
• +2 more outcomes

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

13 partnerships are on record, tiered core and major.

• GMS (Gypsum Management and Supply, Inc.)coreOthers · 1 January 1971GMS is the parent company of Gypsum Supply Company, Ryan Building Materials, and ASI Building Products. Founded in 1971 in Atlanta, Georgia, GMS operates more than 250 distribution centers across 40+ states. GSC-Ryan-ASI operates as subsidiary brands under the GMS national distribution platform with integrated systems, shared resources, and unified customer service standards. GMS is the largest distributor of drywall products in the United States.
• Gypsum Supply Company (GSC)coreOthersGSC is one of three subsidiary brands operating under GMS in Michigan and Northwest Ohio. Founded in 1979 by brothers Roger and Stan Abbott, GSC serves residential and commercial customers through 7 yards in Michigan and Ohio. Combined with Ryan and ASI, it provides the widest building product selection in the Great Lakes region.
• Ryan Building Materials (Ryan)coreOthersRyan Building Materials is one of three subsidiary brands operating under GMS in Michigan. Founded as Bob Ryan, Inc. in the late 1980s and renamed Ryan Building Materials, it serves commercial and residential builders through 3 yards in eastern central Michigan (Harrison Township, Southfield, Troy).
• ASI Building Products (ASI)coreOthersASI Building Products is one of three subsidiary brands operating under GMS in Michigan. Since 1988, ASI has provided residential and commercial construction customers with products from industry-leading national brands through 3 yards in southeastern Michigan (Detroit, Bridgeport, Southfield).
• CertainTeedmajorTechnology or IntegrationGSC-Ryan-ASI are authorized dealers of CertainTeed insulation products including unfaced insulation, kraft faced insulation, foil faced insulation, FSK-25 insulation, sound attenuation unfaced insulation, InsulSafe fiberglass blowing insulation, and MEMBRAIN continuous air barrier.
• Knauf InsulationmajorTechnology or IntegrationGSC-Ryan-ASI are authorized dealers of Knauf Insulation products including EcoBatt kraft faced and unfaced insulation (various R-values), Jet Stream ultra blowing wool insulation, and high-density insulation products.
• Owens CorningmajorTechnology or IntegrationGSC-Ryan-ASI are authorized dealers of Owens Corning insulation products including Thermafiber SAFB mineral wool insulation, TopStop head-of-wall insulation, FOAMULAR rigid foam insulation, RainBarrier mineral wool insulation, FireSpan mineral wool insulation, VersaBoard insulation, Safing insulation, and ProPink loosefill insulation.
• Thermafiber (Owens Corning)majorTechnology or IntegrationGSC-Ryan-ASI are authorized dealers of Thermafiber insulation products including Safing insulation, VersaBoard insulation, SAFB mineral wool insulation, RainBarrier mineral wool insulation, FireSpan mineral wool insulation, and TopStop head-of-wall insulation. Thermafiber is an Owens Corning company.
• ROCKWOOLmajorTechnology or IntegrationGSC-Ryan-ASI are authorized dealers of ROCKWOOL stone wool insulation products including AFB acoustical fire batt, CURTAINROCK stone wool insulation, ROCKBOARD multi-purpose board insulation, ROXUL SAFE stone wool insulation, Comfortboard insulation, CAVITYROCK insulation, and COMFORTBATT stone wool insulation.
• DuPontmajorTechnology or IntegrationGSC-Ryan-ASI are authorized dealers of DuPont insulation products including Tyvek seam tape, Tyvek wrap caps with screws, FlexWrap NF, Styrofoam scoreboard extruded polystyrene insulation, Thermax sheathing foam insulation, Thermax exterior foam insulation, Froth-Pak foam insulation, GREAT STUFF PRO gasket foam, and LiquidArmor liquid flashing and sealant.
• ClarkDietrichmajorTechnology or IntegrationGSC-Ryan-ASI distributes ClarkDietrich steel framing products including steel studs, tracks, and related steel framing accessories through all 13 yard locations.
• USGmajorTechnology or IntegrationGSC-Ryan-ASI distributes USG drywall products, acoustical ceiling tiles and grid systems, and joint treatment products. The company provides submittal support for USG products.
• Armstrong CeilingsmajorTechnology or IntegrationGSC-Ryan-ASI distributes Armstrong ceiling tiles, grid systems, and related acoustical ceiling products. The company provides submittal support and technical resources for Armstrong products.

Scale indicators6 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• ABC Supply Co. ABC Supply is the largest US wholesale distributor of roofing, siding, windows, and building products, with 800+ branches nationwide and parent of L&W Supply. It is a broad incumbent whose product portfolio overlaps GSC-Ryan-ASI's and that competes for the same contractor customers with greater capital scale.
• SRS Distribution: SRS Distribution is one of the largest US building products distributors (roofing, siding, drywall, insulation) and acquired GMS (parent of GSC-Ryan-ASI) in 2025. It is the new ultimate parent and represents the broader national platform against which the Michigan regional operations are benchmarked.
• 84 Lumber: 84 Lumber is one of the largest privately held US building materials suppliers, distributing lumber, engineered wood, siding, windows, and roofing across 250+ locations. While more lumber-focused than GSC-Ryan-ASI, it is a broad incumbent with comparable branch density serving the same contractor base in overlapping geographies.
• Beacon Building Products: Beacon Building Products is one of the largest US distributors of roofing and complementary building products, including siding, insulation, and drywall accessories. It is a broad incumbent whose product portfolio and contractor customer base partially overlap GSC-Ryan-ASI's, especially for building envelope products.
• White Cap (formerly HD Supply Construction Supply): White Cap is one of the largest US construction supply distributors serving commercial and residential contractors with concrete, drywall, fasteners, tools, and safety products. It competes with GSC-Ryan-ASI for commercial contractor spend across multiple product categories at national scale.

Direct peers

• Brockway Smith Company: Brockway Smith distributes specialty building products including drywall, steel framing, and ceilings across the Northeast US, serving commercial and residential contractors through yard locations. Comparable in product mix and branch-based model to GSC-Ryan-ASI though focused on the Northeast geography.
• L&W Supply: L&W Supply is a national gypsum specialty distributor and subsidiary of ABC Supply, distributing drywall, steel framing, insulation, and ceilings. It is the most direct competitor to GSC-Ryan-ASI's core product mix and yard-based distribution model, operating at national scale across the same contractor customer base.
• Lansing Building Products: Lansing Building Products is a specialty distributor of exterior building products including siding, soffit, trim, and related categories, operating across the Eastern US with a branch-based distribution model. Comparable to GSC-Ryan-ASI in product distribution, customer base (contractors and builders), and multi-branch operating model.
• Kamco Supply Corporation: Kamco Supply is a regional building materials distributor in the Northeast and Mid-Atlantic distributing drywall, ceilings, steel, and insulation to commercial contractors. Highly comparable to GSC-Ryan-ASI in product mix, customer type, and yard-based distribution, though geographically focused on the Eastern Seaboard rather than the Midwest.
• Foundation Building Materials (FBM): FBM is a specialty building products distributor focused on drywall, insulation, steel framing, acoustical ceilings, and EIFS across the US and Canada. It directly overlaps GSC-Ryan-ASI's product categories, customer segments (commercial and residential contractors), and yard-based distribution model.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries1 record

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 Gypsum Supply Company