What The Manthei Group does

The Manthei Group is a privately held, family-owned holding company headquartered in Petoskey, Michigan, operating a diversified portfolio of approximately 16 subsidiaries across four verticals: construction materials, forestry products, hospitality, and commercial real estate. The Group's strategic center of gravity is Aster Brands, an in-house brand platform (created 2018) that manages the Redi-Rock large block retaining wall system, Rosetta Hardscapes concrete landscape products, and Pole Base precast light pole foundations, all distributed through a global network of 160+ licensed manufacturers supported by shared product development, sales, marketing, and engineering teams in Petoskey. Complementing this licensing engine are direct-operating businesses including Manthei Wood Products (veneer and specialty hardwood plywood/dieboards), Manthei Construction (Northern Michigan construction services), Manthei Supply (a 6,000 s.f. landscape retail showroom plus four-acre yard), High Format (regional hardscape distribution across MI, IN, IL, WI), Truemont Materials (Redi-Rock/Rosetta/Pole Base production in Florida and southern Georgia), six-plus RV and resort properties across California, Arizona, and other western US locations, and Manthei Capital for commercial real estate holdings.

The Group's business model combines asset-light licensing royalties and engineering services (Aster Brands) with capital-intensive direct operations (manufacturing plants, resort properties, retail yards, and real estate). Revenue mechanics span B2B licensing fees from 150+ Redi-Rock and 20 Rosetta manufacturers, B2B and B2C sales of manufactured concrete, wood, and hardscape products, B2C hospitality revenue from owned RV resorts, and rental/asset appreciation from real estate holdings. The Group is currently in its third generation of family ownership, formalized in 2020, and funds expansion entirely from internal cash flow with no disclosed external institutional investors or debt issuances.

Name

The Manthei Group

Legal name

The Manthei Group

Website

https://themantheigroup.com

Company type

Private

Founded year

1920

Operating status

Operating

Headcount range

101–250 employees

Short description

The Manthei Group is a privately held, third-generation family-owned holding company based in Petoskey, Michigan, operating 16+ subsidiaries across construction materials (Redi-Rock, Rosetta, Pole Base via Aster Brands), forestry products, hospitality RV resorts, and commercial real estate, with a global licensed-manufacturer network of 160+ producers.

Ownership category

akta.pro rank

Product category

Construction Materials and Hardscapes

NAICS

Other Concrete Product Manufacturing (327390), Concrete Pipe, Brick, and Block Manufacturing (32733), Lumber and Other Construction Materials Merchant Wholesalers (4233), Foundation, Structure, and Building Exterior Contractors (2381)

SIC

Concrete Products, Except Block & Brick (3272), Wholesale-Lumber & Other Construction Materials (5030), Construction - Special Trade Contractors (1700), Retail-Lumber & Other Building Materials Dealers (5211)

akta.pro primary industry

Concrete Pavers, Hardscape & Retaining Wall Systems (IMADAAAE)

akta.pro secondary industries

Retaining Walls & Hardscape Structures (HSAPALAH), Masonry & Hardscapes Retail (Brick, Block, Pavers, Stone) (CRAIAEAF), Landscape Construction & Hardscaping (Patios, Retaining Walls, Outdoor Structures) (IMAIAIAE)

Keywords

• Concrete retaining walls
• Hardscape products
• Licensed manufacturer network
• Wood veneer plywood
• RV resort hospitality

Headquarters

HQ city

Petoskey

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Distribution channels1 record

Marketing channels4 records

Core offering

The Manthei Group operates a diversified portfolio of family-owned businesses delivering licensed concrete retaining wall and hardscape products (Redi-Rock, Rosetta Hardscapes, Pole Base) through a global network of 160+ licensed manufacturers, alongside wood veneer and specialty plywood manufacturing, regional concrete supply, construction services, retail landscape supply, RV resort hospitality, and commercial real estate holdings.

Product overview

The Manthei Group is a diversified portfolio of family-owned businesses across forestry products, construction materials, hospitality, and real estate. The core product portfolio centers on Aster Brands (Redi-Rock, Rosetta Hardscapes, Pole Base) - a suite of licensed concrete and hardscape product brands with 160+ global manufacturers. Supporting this are manufacturing operations (Manthei Wood Products, Truemont Materials), construction services (Manthei Construction), retail supply (Manthei Supply), regional hardscape distribution (High Format), hospitality properties (Sky Valley Resorts, Ocotillo RV Resort, Arizona Oasis, Caliente Springs, Black Meadow Landing, Pine Pond, Desert Gardens RV Park), and real estate holdings (Manthei Capital). The portfolio operates across North America with origins dating back to the 1920s.

Differentiator

Problem solved

Functional benefit

Brands

• Aster Brands: Suite of proven, licensed brands managing Redi-Rock, Rosetta Hardscapes, and Pole Base with 160+ manufacturers worldwide. Provides product development, sales, marketing, and engineering support.
• Redi-Rock
• Rosetta Hardscapes
• Pole Base
• Truemont Materials
• Manthei Wood Products
• Manthei Construction
• Manthei Supply
• High Format
• Sky Valley Resorts
• Ocotillo RV Resort
• Pine Pond
• Caliente Springs
• Black Meadow Landing
• Arizona Oasis
• Desert Gardens RV Park
• Manthei Capital

Products and services

• Redi-Rock Licensed concrete retaining wall system and product line producing the world's first large block retaining wall system, used by engineers, retaining wall designers, landscape architects, and contractors for commercial and residential projects.
• Rosetta Hardscapes Licensed concrete landscape product line replicating natural stone and mimicking sculpted concrete for modern hardscape applications, used by landscape architects and contractors.
• Pole Base Licensed precast light pole foundation system offering contractors a more predictable and profitable alternative to cast-in-place foundations for commercial lighting installations.
• Truemont Materials Regional manufacturer and supplier of Aster Brands concrete products (Redi-Rock, Rosetta, Pole Base) serving engineers, retaining wall designers, landscape architects, and homeowners throughout Florida and southern Georgia.
• Manthei Wood Products Wood products manufacturer descended from the original Manthei Brothers Veneer operation, producing hardwood plywood and specialty wood products including dieboards for manufacturing and construction applications.
• Manthei Construction Construction and development services serving Northern Michigan communities, founded in 1968 as MDC Contracting and rebranded to Manthei Construction in 2021.
• Manthei Supply Retail landscape supply company operating a 6,000 s.f. design showroom with four acres of natural flagstones, stepping stones, slabs, stairs, and walls, plus the largest selection of concrete pavers and retaining walls in Northern Michigan.
• High Format Hardscape products provider serving Michigan, Indiana, Illinois, and Wisconsin; formerly Rosetta of Michigan, rebranded in 2020 with expanded technologies and product offerings.
• Sky Valley Resorts RV resort located in California's Coachella Valley on natural hot springs, established 1970, offering vacation accommodations and natural hot springs experiences.
• Ocotillo RV Resort Off-road RV resort located two hours from San Diego, adjacent to 80,000 acres of Ocotillo Wells SVRA, marketed as an off-roader's paradise.
• Arizona Oasis RV resort located on the Colorado River in Ehrenberg, Arizona, acquired by the Manthei family in 2014, offering riverside RV accommodations.
• Caliente Springs RV resort with natural hot springs within the Manthei Group hospitality portfolio.
• Black Meadow Landing RV resort located on the Colorado River within the Manthei Group hospitality portfolio.
• Manthei Capital Commercial real estate holdings and property management within the Manthei Group portfolio.
• Aster Brands Licensed brand portfolio providing product development, sales, marketing, and engineering support to a global network of 160+ manufacturers of Redi-Rock, Rosetta Hardscapes, and Pole Base concrete products.

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Four partnerships are on record, tiered core and minor.

• 160+ Licensed Manufacturers (Aster Brands)coreChannel Partner/ Reseller/ DistributorAster Brands portfolio (Redi-Rock, Rosetta Hardscapes, Pole Base) operates through a network of licensed manufacturers worldwide. Redi-Rock has 150+ licensed manufacturers, Rosetta has 20 licensed manufacturers in North America and Europe.
• Truemont MaterialscoreStrategic or Co-development PartnerTruemont Materials produces and supplies Redi-Rock, Rosetta, and Pole Base products to engineers, retaining wall designers, landscape architects, and homeowners throughout Florida and southern Georgia. Established 2022 near Jacksonville, Florida.
• High Format (formerly Rosetta of Michigan)coreStrategic or Co-development PartnerRebranded from Rosetta of Michigan in 2020, offering expanded technologies and product offerings in hardscapes within Michigan, Indiana, Illinois, and Wisconsin.
• TechniplyminorOEM/ Whitelabel/ Licensing PartnerAcquired in 2013 by third generation Manthei family. Previously a customer of Manthei, Inc., Techniply is a hardwood plywood company producing high-quality dieboards and specialty plywood.

Scale indicators3 records

Recent moves10 records

Expansion highlights6 records

Broad incumbents

• Oldcastle APG: CRH plc's Americas architectural products group and the largest North American hardscape/segmental retaining wall manufacturer (Belgard, Anchor Wall Systems). Competes head-on with Redi-Rock and Rosetta in commercial and residential hardscapes.
• Forterra: Large North American manufacturer of concrete and building products including pipe, precast, and masonry. Comparable as a scaled concrete-products competitor with a multi-product portfolio.

Direct peers

• Belgard: Oldcastle APG's hardscape brand offering pavers, retaining walls, and outdoor living products through a broad dealer network. Most direct comparable to Redi-Rock and Rosetta Hardscapes in segmental retaining walls and concrete pavers.
• Unilock: North American concrete paver and wall manufacturer selling through licensed/dealer channels. Comparable to Redi-Rock and Rosetta in product category, channel structure, and target end markets.
• Anchor Wall Systems: Oldcastle APG's segmental retaining wall brand, historically one of the largest direct competitors to Redi-Rock in the engineered retaining wall segment.
• Keystone Retaining Wall Systems: Concrete segmental retaining wall systems manufacturer with a licensed producer network similar to Redi-Rock's licensing model; competes in the same commercial and transportation infrastructure end markets.
• EP Henry: Mid-Atlantic hardscape manufacturer of concrete pavers and retaining walls. Comparable to Redi-Rock and Rosetta in product mix, dealer-driven distribution, and target customer segments.
• Pavestone (Quikrete): Quikrete-owned concrete paver and segmental retaining wall brand sold through mass and dealer channels. Directly comparable to Redi-Rock and Rosetta Hardscapes on product, scale, and channel.
• County Materials: Midwest concrete products manufacturer producing masonry, retaining walls, and precast components. Comparable to Redi-Rock and High Format in geography, product line, and customer base.
• Techo-Bloc: Designer and manufacturer of concrete pavers, slabs, and retaining walls for the residential and commercial landscape market. Direct product overlap with Rosetta Hardscapes and Redi-Rock in premium hardscape.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/themantheigroup
• LinkedInlinkedin.com/company/the-manthei-group
• Instagraminstagram.com/themantheigroup

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries17 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 The Manthei Group