Circular NumberCircular TitleSummaryState(s)
CI-AA-2026-006MAY 2026 CIRCULAR INDEX RELEASEDISO provides the May 2026 circular index, a list of all the circulars issued during the past month. All
LI-AL-2026-007NOTICE TO MANUALHOLDERS REPORT – MAY 2026ISO provides the notice to manualholders report, an updated listing of the latest revision numbers in effect as of May 2026 for the listed lines of business.All
LI-BP-2026-048BUSINESSOWNERS POLICY EXPERIENCE REVIEWED BY STAFF;
DETAILS AVAILABLE IN NEW INDICATIONS CENTER		ISO announces the Indications Center has been updated with review indications and staff actions for the 2026 Group 2 states for businessowners policy experience review. The circular is intended exclusively for ISO participating insurers.AR, DC, DE, LA, MA, MD, ME, MO, MS, NY, PA, TX
LI-CA-2026-170DELAWARE REVISION OF COMMERCIAL AUTOMOBILE
LIABILITY INCREASED LIMIT FACTORS APPROVED		ISO announces revised increased limit factors revision representing a 4.3% overall change for Delaware commercial automobile has been filed. The changes are applicable to all policies written on or after November 1, 2026. DE