Organization · Private Equity
Rock Island Capital LLC
Rock Island Capital LLC is a private equity firm based in Oak Brook, Illinois, specializing in middle market investments across various industries in the United States.
Overview
What Rock Island Capital LLC does
What Rock Island Capital LLC is
Rock Island Capital LLC is a private equity firm based in Oak Brook, Illinois, specializing in middle market investments across various industries in the United States.
How it participates in the startup ecosystem
The current public profile supports funder capabilities. Each capability below is shown separately so organization identity and role-specific information do not get conflated.
Operational profile
Organization status and context
Organization status describes the entity itself. Funding and program availability appear within the relevant capability profile.
- Operational status
- Active
- Organization type
- Private Equity
- Structured capabilities
- Funder
- Last reviewed
- March 3, 2026
Official channels
Find Rock Island Capital LLC elsewhere
Open the official website or a supported primary organization account.
Capability profile
Rock Island Capital LLC as a funder
Investment thesis
Rock Island Capital invests in middle market companies, providing private capital to support their growth and ownership transitions. The firm emphasizes flexibility in its investment criteria.
Focus narrative
Rock Island Capital invests in middle market companies, providing private capital to support their growth and ownership transitions. The firm has raised over $550 million in committed capital and emphasizes flexibility in its investment criteria.
Focus and fit
- Stages
- Growth Equity
- Regions
- North America
Availability
- Currently deploying
- Not published
Portfolio and track record
- Recorded portfolio count
- 12
Portfolio context
Notable portfolio companies include RP Rents, Exposed Design Group, Oklahoma Chiller, LUX Dynamics, Runyon Surface Prep, Hansaloy, Scratch and Peck, ALZA Group, Superior Felt & Filtration, Valley Fastener Group, Central Power, and Esmark.
Common questions
What to know about Rock Island Capital LLC
Upseed classifies Rock Island Capital LLC under the Private Equity organization type. Its current public profile includes funder capabilities.
Source and update disclosure
Know what this page is based on
Source basis
Public organization and program material, official websites, and structured Upseed records.
Last reviewed
March 3, 2026
Known limits
Capability profiles appear only when a structured public profile also contains decision-useful role evidence. Terms and availability can change.
Upseed is an independent guide. It is not affiliated with or endorsed by the organization described on this page.