Insights

M&A momentum ISG has a history of growth through acquisitions (Cathedral Contracts) that expanded its retail fit-out capabilities, indicating openness to strategic partnerships and large-scale projects with cross-sell potential across geographies.

Sustainability leadership Award recognition for Best of BREEAM 2024 in refurbishment and fit-out showcases a strong sustainability credential, presenting opportunities to pursue green building mandates, retrofits, and clients prioritizing ESG commitments.

Skills and outreach Active initiatives around construction skills development, Open Doors partnerships, and the Construction Skills Academy suggest pathways for pre-employment programs, workforce planning services, and collaboration on talent pipelines for large clients.

Innovation and circular economy Strategic partnerships with Tsunami Axis and focus on circular interior materials indicate a differentiator in sustainable, material-efficient project delivery, opening doors to clients seeking innovative, low-waste construction solutions.

Large-scale financial health With revenue in the multi-billion dollar range and a sizable global workforce, ISG is positioned for high-value, complex projects and enterprise contracts, making it a strong candidate for long-term, multi-project programs with corporate clients.

ISG Tech Stack

ISG uses 8 technology products and services including LinkedIn Ads, Hotjar, Microsoft Clarity, and more. Explore ISG's tech stack below.

Media & News

ISG's Email Address Formats

ISG uses at least 2 format(s):
ISG Email FormatsExamplePercentage
First.Last@isgplc.comJohn.Doe@isgplc.com
87%
FLast@isgplc.comJDoe@isgplc.com
10%
First.Middle@isgplc.comJohn.Michael@isgplc.com
2%
FirstLast@isgplc.comJohnDoe@isgplc.com
1%
First.Last@isgltd.comJohn.Doe@isgltd.com
99%
First.MiddleLast@isgltd.comJohn.MichaelDoe@isgltd.com
1%

Frequently Asked Questions

What is ISG's phone number?

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You can contact ISG'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 ISG's stock symbol?

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ISG is a publicly traded company; the company's stock symbol is CISGX.

What is ISG's official website and social media links?

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ISG's official website is isgltd.com and has social profiles on LinkedIn.

How much revenue does ISG generate?

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As of August 2026, ISG's annual revenue is estimated to be $1B - $10B.

What is ISG's SIC code NAICS code?

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ISG's SIC code is 7372 - Prepackaged Software NAICS code is 23 - Construction.

How many employees does ISG have currently?

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As of August 2026, ISG has approximately 2K employees across 6 continents, including EuropeNorth AmericaAsia. Key team members include Ceo: D. W.Cfo: S. B.Chief Human Resources Officer: J. F.. Explore ISG's employee directory with LeadIQ.

What industry does ISG belong to?

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ISG operates in the Construction industry.

What technology does ISG use?

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ISG's tech stack includes LinkedIn AdsHotjarMicrosoft ClaritySitecoreAdobe Experience CloudMicrosoft AzureWrikeAutodesk.

What is ISG's email format?

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ISG's email format typically follows the pattern of First.Last@isgplc.com. Find more ISG email formats with LeadIQ.
ISG logo

ISG

ConstructionEngland, United Kingdom1001-5000 Employees

ISG is a construction services company based in London, United Kingdom, with a headquarters at 33 Aldgate High Street, London EC3N 1AG. The business operates in the construction industry and reports a global workforce of 2,800 specialists, with a stated employee range of 1,001 to 5,000. ISG focuses on delivering spaces and places that support the daily operations of people and businesses, combining established delivery methods with an agile, fast-paced culture. The company has grown through acquisitions, including the 2007 purchase of Kent-based Cathedral Contracts Ltd for £11.8 million, expanding its retail fit-out capabilities. In 2024, ISG was awarded the Best of BREEAM 2024 Award for Refurbishment & Fit Out for the Northcliffe House refurbishment.

Section iconCompany Overview

Phone number
Website
isgltd.com
SIC Code
7372 - Prepackaged Software
Stock Symbol
CISGX
NAICS Code
23 - Construction
Employees
1001-5000

Section iconFunding & Financials

  • $1B - $10B

    ISG's revenue is estimated to be in the range of $1B - $10B

Section iconFunding & Financials

  • $1B - $10B

    ISG's revenue is estimated to be in the range of $1B - $10B

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