# RLI Insurance RLI Insurance is an Insurance based in Peoria, United States. ## Overview - **Organization type:** Insurance - **Headquarters:** Peoria, United States - **Region:** North America - **Address:** 9025 North Lindbergh Drive, Peoria, IL 61615 - **Founded:** 1965 - **Assets under management:** Undisclosed - **Website:** www.rlicorp.com - **LinkedIn:** https://www.linkedin.com/company/rli-insurance-company ## Regulatory record - **Reports private funds:** No ## About RLI provides specialty property & casualty insurance and surety bonds that help protect businesses, individuals and families from life's uncertainties. ## Sectors - Insurance - Real Estate - Energy Transition & Renewables ## People - Craig Kliethermes — President and CEO ## Questions ### Who runs investment decisions at RLI Insurance? Chief Investment Officer and Treasurer Aaron Diefenthaler oversees the investment portfolio, which backs the firm's property and casualty liabilities. He also serves on the board of Prime Holdings Insurance Services, linking the office to other insurance-sector assets. The CEO, Craig Kliethermes, provides enterprise-level oversight but the investment function reports to Diefenthaler. ### Is RLI structured as a traditional insurance company or does the investment office operate separately? RLI is a publicly traded insurance carrier, but its investment office functions with a distinctive governance overlay. Every RLI employee is required to be a shareholder, which influences how the investment team evaluates risk and aligns its asset allocation with long-term balance-sheet preservation. That structure gives the office a capital-preservation ethos closer to a family office than a typical corporate treasury. ### What types of assets does RLI's investment portfolio hold? The portfolio allocates across fixed income, public equities, and illiquid alternatives including real estate and renewable infrastructure. Confirmed holdings include commercial real estate assets in Peoria — the corporate headquarters and operations center — and an on-site solar installation that feeds energy into the firm's operations. ### How does RLI source investment opportunities? The investment office operates with a small, internal team led by the CIO. It does not function as a fund-of-funds allocator or maintain a broad external-manager program visible in public filings. In addition to internally managed fixed-income and equity portfolios, the office invests directly in real assets and participates in insurance-sector relationships, such as Aaron Diefenthaler's board seat at Prime Holdings Insurance Services. ### Where does RLI's investment capital originate? The portfolio is funded by the insurance float — premiums collected from policyholders before claims are paid out — and RLI's own retained equity. Since the firm is publicly traded and employs a universal employee-ownership requirement, the capital base reflects both operational cash flow and the collective interest of its workforce-shareholders. ## Related profiles - [RLG Capital](https://altss.com/profile/rlg-capital) - [RLJ Credit](https://altss.com/profile/rlj-credit) --- Last updated: 2026-06-03T20:00:00.000Z Canonical page: https://altss.com/profile/rli-insurance-company Maintained by Altss — https://altss.com — methodology: https://altss.com/methodology