Insights

Regional Market Focus Grunau Company primarily serves southeastern Wisconsin including major locations such as Milwaukee, Madison, and Green Bay, indicating strong regional dominance and opportunities for localized service expansion or specialized solutions within this geographic area.

Diverse Service Portfolio With capabilities spanning HVAC, plumbing, medical gas, process piping, electrical, and underground utilities, Grunau offers comprehensive mechanical solutions, presenting cross-selling opportunities across multiple industries and project types in the commercial and industrial sectors.

Established Industry Presence Operating since 1920 and maintaining the benchmark of excellence, Grunau’s long-standing reputation facilitates trust-based sales approaches and builds potential for repeat business and long-term contract opportunities.

Growing Financial Footprint With revenue estimates between 100 million and 250 million dollars, Grunau presents a substantial market presence, indicating a capacity and likelihood to invest in new projects, technologies, or strategic partnerships to support business expansion.

Potential for Expansion Their sister operations extend into multiple states including Ohio, Indiana, Pennsylvania, and Florida, suggesting scalable regional expansion opportunities and partnerships that could help penetrate new markets or diversify service offerings.

Grunau Company Tech Stack

Grunau Company uses 8 technology products and services including Cloudflare CDN, cdnjs, Cloudflare, and more. Explore Grunau Company's tech stack below.

  • Cloudflare CDN
    Content Delivery Network
  • cdnjs
    Content Delivery Network
  • Cloudflare
    Content Management System
  • CookieYes
    Cookie Compliance
  • Twemoji
    Font Scripts
  • Yoast SEO
    Search Engines
  • Google Tag Manager
    Tag Management
  • Bootstrap
    UI Frameworks

Media & News

Grunau Company's Email Address Formats

Grunau Company uses at least 1 format(s):
Grunau Company Email FormatsExamplePercentage
First.Last@grunau.comJohn.Doe@grunau.com
89%
FirstL@grunau.comJohnD@grunau.com
6%
F.Last@grunau.comJ.Doe@grunau.com
3%
F_Last@grunau.comJ_Doe@grunau.com
2%

Frequently Asked Questions

What is Grunau Company's phone number?

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You can contact Grunau Company's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Grunau Company's official website and social media links?

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Grunau Company's official website is grunau.com and has social profiles on LinkedIn.

How much revenue does Grunau Company generate?

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As of January 2026, Grunau Company's annual revenue is estimated to be $110M.

What is Grunau Company's SIC code NAICS code?

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Grunau Company's SIC code is 7389 - Business Services, Not Elsewhere Classified NAICS code is 238 - Specialty Trade Contractors.

How many employees does Grunau Company have currently?

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As of January 2026, Grunau Company has approximately 287 employees across 2 continents, including North AmericaAsia. Key team members include Chief Executive Officer: S. M.Cfo: J. H.Cfo: J. H.. Explore Grunau Company's employee directory with LeadIQ.

What industry does Grunau Company belong to?

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Grunau Company operates in the Specialty Trade Contractors industry.

What technology does Grunau Company use?

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Grunau Company's tech stack includes Cloudflare CDNcdnjsCloudflareCookieYesTwemojiYoast SEOGoogle Tag ManagerBootstrap.

What is Grunau Company's email format?

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Grunau Company's email format typically follows the pattern of First.Last@grunau.com. Find more Grunau Company email formats with LeadIQ.

When was Grunau Company founded?

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Grunau Company was founded in 1920.

Grunau Company

Specialty Trade ContractorsWisconsin, United States201-500 Employees

Grunau Company is a mechanical systems contractor headquartered in the greater Milwaukee area which specializes in any size commercial or industrial project in a variety of industries. The majority of our work is completed throughout southeastern Wisconsin as far west as Madison and as far north as Green Bay, WI. 

Our mechanical systems capabilities include HVAC (heating, ventilation, and air conditioning), plumbing, medical gas, process piping, electrical, refrigeration, and underground site utilities. Grunau completes installations, inspections, maintenance, and service 24/7 for our customers.  We’ve been the Benchmark of Excellence in our field since 1920.

Our sister operations, Grunau Fire Protection, has offices in Oak Creek, WI; Kenosha, WI (Flannery FP); Indianapolis, IN; Youngstown, OH; Pittsburgh, PA (Moon Township); and Orlando, FL.

Section iconCompany Overview

Phone number
Website
grunau.com
SIC Code
7389 - Business Services, Not Elsewhere Classified
NAICS Code
238 - Specialty Trade Contractors
Founded
1920
Employees
201-500

Section iconMedia & News

Section iconFunding & Financials

  • $100M$250M

    Grunau Company's revenue is estimated to be in the range of $100M$250M

Section iconFunding & Financials

  • $100M$250M

    Grunau Company's revenue is estimated to be in the range of $100M$250M

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