The Pioneer ILS Interval Fund operates as a non-diversified, closed-end management investment company. Its primary investment objective is to allocate capital to insurance-linked securities (ILS). This category of specialized instruments spans various types, such as catastrophe bonds (also known as event-linked or insurance-linked bonds), quota share instruments (frequently called insurance sidecars), collateralized reinsurance investments, industry loss warranties, and event-linked swaps. Furthermore, the fund may hold securities issued by firms in the broader insurance and reinsurance industries, as well as other related financial products. Pioneer Investment Management, Inc. serves as the fund's investment adviser. The fund was established on July 15, 2014, and its headquarters are located in Boston, Massachusetts.