Private investment firm
Cranbrook Partners & Co.
- HeadquartersTroy, MI S2
- Websitecranbrookpartners.com
- Last verifiedNovember 5, 2026
At a glance
| Deal types | Platform, Add-on, Minority S1 |
|---|---|
| Sectors | IT Services & MSP, Industrial & Manufacturing |
What Cranbrook Partners & Co. buys
Cranbrook Partners & Co. is a private investment firm in Troy, Michigan that owns and actively runs a small group of private companies. Founder and president Zachary Savas ran it as a small Chicago investment bank in the 1990s. It publishes no revenue or EBITDA range and shows no outside fund on its site. Instead it describes the sellers it wants: owners who want to exit or grow, companies that have outgrown their management, corporations shedding non-core or struggling units, and small businesses with room to expand.
It holds four companies today. It bought Ritner Steel, a Pennsylvania structural steel fabricator, in December 2025. It invested in Roman Stone, a New York precast maker, in 2023 beside majority investor The Alzana Group. It bought into iwerk, a Detroit managed IT and software firm, in 2004, and it started Fire CATT, a fire hose testing service, in 2006. A small IT company could also meet it as an add-on, because iwerk runs its own acquisition effort, led by Ian Savas, and bought the assets of Integrated Systems Consultants in 2025.
Recent deals
Announced in the 24 months before November 5, 2026.
| Date | Company | Type | Sector | Source |
|---|---|---|---|---|
| Dec 2025 | Ritner SteelCarlisle, Pennsylvania structural steel fabricator founded in 1948, bought from its owner and CEO | Platform | Industrial & Manufacturing | Source |
| 2025 | Integrated Systems ConsultantsAssets bought by iwerk, which trades legally as Lewis ig | Add-on | IT Services & MSP | Source |
| 2025 | Silica XJoint venture formed by Roman Stone | Investment | Industrial & Manufacturing | Source |
Portfolio by sector
From the firm's portfolio page S1.
Our Companies
- Fire CATT
- iwerk
- Ritner Steel
- Roman Stone Construction Company
Past investments: Production Spring, Spot Imaging, Vexor Technology
Greymont’s take
How Cranbrook Partners & Co. fits a seller
Cranbrook suits an owner who wants a buyer that stays close to the business and is willing to take on one that needs fixing or new leadership. It keeps companies a long time: it bought into what is now iwerk in 2004 and held Production Spring from 2002 until 2024. Its site says it would rather stay hands off but steps in when a company needs it.
Because it publishes no size range and shows no fund, an owner should ask early how much it can pay on its own and whether a partner would join, as The Alzana Group did on Roman Stone. It is also worth asking who would run the company after closing. An IT business owner should talk to iwerk directly, since that is where its IT deals happen.
Questions owners ask
Does Cranbrook Partners buy IT services companies?
Yes, through iwerk, a Detroit managed IT, security and software firm it has held since 2004. iwerk has its own acquisitions page aimed at technology founders, and it bought the assets of Integrated Systems Consultants in 2025.
What size company does Cranbrook Partners look for?
It does not say. The site gives no revenue or EBITDA range and describes the type of seller it wants instead, including small companies with high growth potential.
Which of its companies did Cranbrook buy, and which did it build?
It bought Ritner Steel in 2025, invested in Roman Stone in 2023 and acquired an interest in the businesses that became iwerk in 2004. It formed Fire CATT in 2006 with Snap-tite.
Does Cranbrook Partners always buy control?
No. It bought Ritner Steel outright, but Roman Stone's 2023 release names The Alzana Group as majority investor, with Cranbrook and the company's president as fellow owners.
Sources
- S1Cranbrook Partners & Co.: leadership, companies, who we seek and investment history Accessed November 5, 2026
- S2Cranbrook Partners Completes Acquisition of Ritner Steel (December 8, 2025) Accessed November 5, 2026
- S3Ritner Steel: News and Press Accessed November 5, 2026
- S4iwerk home page Accessed November 5, 2026
- S5iwerk: Acquisitions Accessed November 5, 2026
- S6iwerk: About Accessed November 5, 2026
- S7Roman Stone Announces New Ownership Group (September 14, 2023) Accessed November 5, 2026
- S8Fire CATT home page Accessed November 5, 2026
Compiled by Greymont Advisors from public sources, including the firm’s own website and press releases. Greymont is not affiliated with Cranbrook Partners & Co.. Figures are as reported on the dates shown and may have changed. Request a correction