RLI Corp. RLI

RLI Company Overview

RLI Corp. is a U.S.-based specialty insurance company that underwrites property, casualty, and surety products for niche and underserved markets. The company operates primarily through excess and surplus (E&S) lines and specialty admitted insurance markets, focusing on risks that are often more complex or difficult to place through standard insurance carriers. RLI serves businesses, professionals, transportation operators, contractors, and individuals through a network of independent agents, brokers, and program administrators. Its operations are concentrated in specialty commercial insurance, with additional exposure to personal umbrella and marine products.

The company’s primary revenue drivers are underwriting income and investment income generated from its insurance float and investment portfolio. RLI is recognized for disciplined underwriting, conservative reserving practices, and a long-term emphasis on profitability rather than premium volume growth. Founded in 1965 as Replacement Lens, Inc., the company originally specialized in contact lens insurance before evolving into a diversified specialty insurer. Over time, RLI expanded through targeted product development, acquisitions, and specialty market positioning, ultimately becoming a publicly traded insurance holding company listed on the New York Stock Exchange under the ticker RLI.