Buyout PE
Rock Island Capital
Rock Island Capital acquires controlling stakes in established, profitable businesses, from Illinois, United States. It states a focus on industrials & manufacturing and business & professional services.
Stated investment criteria
What Rock Island Capital says it buys
Read from Rock Island Capital’s own website in August 2026. This is what the firm says it buys, not what anyone has recorded it buying, and figures are shown in the currency the firm itself used - nothing here is converted. Every line links to the page it was read from.
A stated mandate is a firm’s description of itself and was true of the page on the day it was read; firms widen and narrow what they will look at without updating the site. Rock Island Capital states that it will take either a controlling or a minority stake. Nothing here is a commitment by Rock Island Capital to consider any particular business, and nothing on this page is represented as being for sale.
SEC filings
What Rock Island Capital has raised
From this firm's own Form D filings. A fund files one within fifteen days of its first sale, under penalty of perjury, which makes these the hardest numbers on the page.
| Vehicles filed | 6 |
| Total capital raised | $217m |
| Largest single vehicle | $105m |
| Filing history | 2011 to 2023 |
| Smallest accepted commitment | $100k |
| Filed from | ILLINOIS |
Form D covers US-domiciled vehicles raised from accredited investors. It will not capture a fund raised outside the United States, separately managed accounts, or capital deployed off balance sheet, so treat these as a floor rather than a total.
Regulatory record
How Rock Island Capital is registered
From this firm's Form ADV, the annual filing every registered and exempt investment adviser makes to the SEC.
| Adviser status | SEC registered |
| Regulatory assets under management | $637m |
| Employees | 10 |
| Private funds advised | 13 · $866m gross |
| SEC adviser number | CRD 161623 |
Portfolio
Disclosed holdings
Companies Rock Island Capital lists on its own website. No investment years are published.
| Company | Invested | Years held | Recorded transaction |
|---|---|---|---|
| ALZA Group | — | — | — |
| Advanced Industrial Devices | — | — | — |
| Atlas Connectivity | — | — | — |
| Baker Manufacturing | — | — | — |
| Belle Aire | — | — | — |
| Brickhouse | — | — | — |
| Central Power | — | — | — |
| Continental Services | — | — | — |
| DGS Retail | — | — | — |
| ERC Midwest | — | — | — |
| Environmental Recovery Corporation | — | — | — |
| Esmark | — | — | — |
| Excel Engineering | — | — | — |
| Exposed Surfaces | — | — | — |
| Hansaloy | — | — | — |
| Kemco Systems | — | — | — |
| LUX Dynamics | — | — | — |
| Lake Shore Group | — | — | — |
| Mascari Sales Marketing | — | — | — |
| Oklahoma Chiller | — | — | — |
| Piedmont Candy Company | — | — | — |
| Pumps and Controls | — | — | — |
| RP Rents | — | — | — |
| Runyon Equipment Rental | — | — | — |
| Runyon Surface Prep | — | — | — |
| Scratch and Peck | — | — | — |
| Superior Felt & Filtration | — | — | — |
| Thorco | — | — | — |
| Valley Fastener Group | — | — | — |
| Venture Sales Group | — | — | — |
Compiled from Rock Island Capital’s published portfolio page. Where a recorded transaction is shown, that company was the target of a reported deal and has most likely already been realised. Nothing here is represented as being for sale.
Valuation context
Transaction values in Industrials & Manufacturing
What companies have actually sold for in industrials & manufacturing, across 1,298 recorded transactions.
The full industrials & manufacturing picture - most active acquirers, recent transactions and every investor in the sector.
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