# Rock Island Capital

Rock Island Capital is a Private Equity based in Oak Brook, United States.

## Overview

- **Organization type:** Private Equity
- **Headquarters:** Oak Brook, United States
- **Region:** North America
- **Address:** 1415 W 22nd Street Suite 1250, Oak Brook, IL 60523, United States
- **Founded:** 2005
- **Assets under management:** $550M+
- **Website:** rockislandcapital.com
- **LinkedIn:** https://www.linkedin.com/company/rockislandcapital

## Regulatory record

- **CRD number:** 161623
- **SEC file number:** 801-76979
- **Registration status:** Registered
- **Reports private funds:** Yes
- **IAPD record:** https://adviserinfo.sec.gov/firm/summary/161623

## About

Rock Island Capital is an SEC-registered investment adviser in Oak Brook, IL, registered since 2012. The firm manages approximately $637 million in regulatory assets. It has 10 employees and 10 investment advisers.

## Sectors

- Industrial Tech
- Manufacturing & Distribution
- Business Services
- Environmental Services
- Food & Beverage

## People

- Alfred M. Mattaliano

## Questions

### What types of businesses does Rock Island Capital acquire?

Rock Island Capital targets North American lower-middle-market industrial manufacturing and specialized business services companies. The firm pursues control positions in profitable, established enterprises facing succession issues, corporate divestitures, or management buyout opportunities. Its portfolio includes precision-component manufacturers, environmental-recovery operators, and regional HVAC/plumbing service providers.

### Does Rock Island Capital raise traditional private equity funds?

The firm does not publicly disclose its funding structure. There are no announcements of closed funds, limited partner communications, or Form ADV filings readily traceable to a commingled vehicle. This opacity leaves open the possibility of a deal-by-deal capital model, a single-investor backing, or a permanently capitalized holding-company structure.

### What is the scale of Rock Island Capital's portfolio?

The firm lists thirty portfolio companies on its website, covering segments from industrial manufacturing (Hansaloy, Oklahoma Chiller) to food ingredients (Piedmont Candy Company) and environmental services (Environmental Recovery Corporation). No aggregate revenue, EBITDA, or total invested capital figures are disclosed, leaving the portfolio's combined enterprise value unknown.

## Related profiles

- [Rock Impact Capital](https://altss.com/profile/rock-impact-capital)
- [Rockline Equity](https://altss.com/profile/rockline-equity)

---

Last updated: 2026-07-08T22:58:45.271Z

Canonical page: https://altss.com/profile/rock-island-capital

Maintained by Altss — https://altss.com — methodology: https://altss.com/methodology