CX 27 00 Underlying Claims-Made Coverage

An Insurance Services Office (ISO) standard form. It makes the excess coverage follow claims-made underlying insurance, applying a retroactive date shown in the Schedule, requiring claims to be first made during the policy period, and offering an extended reporting period for an extra charge.

1 other edition date appears in one or two filings each, often carrier-specific versions: 09 08.

• Edition in use: in the past 12 months, 17 companies filed the 12 19 edition.
• CX 27 01 (Extended Reporting Period Endorsement) is filed alongside it most often, in 45 of the same filings (90%).

Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Jun 2026, excluding withdrawn and rejected filings. One filing can cover several affiliated companies.

• CX 27 01Extended Reporting Period Endorsement45 filings
• CX 00 01Commercial Excess Liability Coverage Form42 filings
• CX 21 45Exclusion of Certified Nuclear, Biological, Chemical or Radiological Acts of Terrorism; Cap on Losses From Certified Acts of Terrorism42 filings
• CX 21 29Conditional Exclusion of Terrorism (Relating to Disposition of Federal Terrorism Risk Insurance Act)41 filings
• CX 21 30Cap on Losses From Certified Acts of Terrorism41 filings
• CX 21 31Exclusion of Other Acts of Terrorism Committed Outside the United States; Cap on Losses From Certified Acts of Terrorism41 filings
• CX 21 34Extended Reporting Period for Terrorism Coverage41 filings
• CX 21 35Exclusion of Certified Acts of Terrorism and Exclusion of Other Acts of Terrorism Committed Outside the United States41 filings
• CX 21 36Exclusion of Punitive Damages Related to a Certified Act of Terrorism41 filings
• CX 21 32Conditional Exclusion of Terrorism Involving Nuclear, Biological or Chemical Terrorism (Relating to Disposition of Federal Terrorism Risk Insurance Act)40 filings