| # | Company | Employees |
|---|---|---|
| 1 |
The Weitz Companyweitz.com
Full-service construction company specializing in design-build, general contracting, and construction management across industrial and commercial sectors nationwide. |
1,241 |
| 2 |
Interstatesinterstates.com
A trusted partner for electrical, automation, and operational technology needs in industrial manufacturing and processing facilities worldwide, focused on collaborative, family-like teamwork |
1,158 |
| 3 |
EFCO Forming & Shoring Solutionsefcoforms.com
EFCO provides safe, reliable, and cost-efficient concrete formwork solutions for construction projects, focusing on efficiency, quality, and customer service |
930 |
| 4 |
The Waldinger Corporationwaldinger.com
Mechanical, electrical, and sheet metal contracting services with a people-first approach, operating across the Midwest United States. |
927 |
| 5 |
Baker Groupthebakergroup.com
A premier specialty contractor in Iowa offering a wide range of services including mechanical, electrical, HVAC, plumbing, building automation, and security systems |
836 |
| 6 |
Carpenters Unioncarpenters106.org
Construction company specializing in carpentry services, based in Altoona, IA, United States |
748 |
| 7 |
Russell Co.russellco.com
A nationally ranked construction and development firm with over $3 billion in projects across 33 states, focused on exceeding client expectations and creating career opportunities |
512 |
| 8 |
Tri-City Grouptricityelectric.com
Experienced team providing a wide range of electrical services including engineering, integration, security, telecommunications, disaster recovery, and residential & construction projects |
458 |
| 9 |
PDMpdmprecast.com
Employee-owned producer of precast concrete and structural steel fabricator Specializing in architectural and structural components for various construction projects |
311 |
| 10 |
Clow Valve Companyclowvalve.com
Manufacturing waterworks valves and fire hydrants through iron and brass foundries, machine shops, and assembly plants to provide infrastructure solutions across the country. |
225 |
| 11 |
Graham Construction a 3G Company3gcos.com
A leading Construction Manager and General Contractor in the Midwest, specializing in healthcare, complex projects, renovations, and maintaining long-term relationships |
202 |
| 12 |
Conlon Constructionconlonco.com
A company with over 120 years of experience offering commercial construction services, including management, design-build, development, fixturing, and maintenance Committed to quality and customer relationships |
172 |
| 13 |
Todd & Sargent, Inc.tsargent.com
A company specializing in engineering and construction services for over fifty years, dedicated to ensuring client growth and success |
151 |
| 14 |
Peterson Contractors Inc.pcius.com
A trusted heavy civil and ground improvement contractor with over 50 years of experience, specializing in complex projects and embracing innovative technologies |
151 |
| 15 |
Story Constructionstorycon.com
An employee-owned company in Iowa offering general contracting, construction management, and design-build services for commercial projects |
148 |
| 16 |
Kinzler Corporationkinzlercorp.com
An employee-owned family of companies that install building products, distribute materials, and service/install garage doors for residential and commercial projects |
147 |
| 17 |
Metal Design Systems, Incmetaldesignsystems.com
National provider of Architectural Wall Cladding Systems and Facility Branding Programs using materials like ACM, MCM, Stainless Steel, and more Offers design assistance and custom solutions |
78 |
| 18 |
John Deere Davenport Works
Construction company based in Davenport, Iowa, specializing in manufacturing equipment for industries such as agriculture, forestry, and construction |
77 |
| 19 |
Star Equipment, Ltd.starequip.com
A family-owned company providing top-quality construction equipment, training, and services to maximize profitability while minimizing downtime for clients |
63 |
| 20 |
Hallett Materialshallettmaterials.com
Established in 1918, this company operates over 40 aggregate pits in Central and Western Iowa, providing quality services and products for a century |
48 |
| 21 |
Kaufman Constructionkaufmanconstruction.com
Specializing in remodeling, building new homes with character, and restoring older homes, we focus on quality design and construction with excellent customer service |
26 |
| 22 |
Pengo Corporationpengoattachments.com
A company with over 68 years experience manufacturing industry-leading drilling attachments for agriculture, construction, utility, and infrastructure industries, introducing over 70 patents |
20 |
| 23 |
D&B Remodelingskogmanremodeling.com
Specializing in remodeling services, providing high-quality workmanship and customer service Visit our official website for more information |
13 |
| 24 |
HomeWorx Inc.homeworxiowa.com
Residential remodeling company based in Des Moines, IA, with a skilled team providing honest, technology-driven services to simplify the customer experience |
10 |
| 25 |
Brown's Heavy Equipmentbheliftparts.com
Family-owned full-service company repairing, leasing, and selling heavy equipment and parts to construction and mining industries Authorized service center for various brands |
9 |
| 26 |
Tri-County Enterprises, Inc.tricounty-iowa.com
A full-service exterior remodeling contractor offering residential and commercial services including roofing, siding, gutters, and windows with a focus on quality, innovation, and community involvement |
8 |
| 27 |
Compelling Homes,LLCcompellinghomes.com
A design-build contractor focused on remodeling homes around homeowners' lifestyles, offering architectural, interior design, construction, and project management services with trust and precision |
5 |
| 28 |
Hammer For Hirehammer-for-hire.business.site
A local business specializing in remodeling, light construction, and custom woodworking, dedicated to ensuring customer satisfaction and delivering quality work |
4 |
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Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 2, 2026.
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The same list elsewhere in United States
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