Coverage description
An Insurance Services Office (ISO) standard form. It keeps scheduled terrorism exclusion endorsements from applying to injury or damage from covered autos, so umbrella terrorism coverage for those autos follows the underlying insurance.
Editions
Edition dates as filed, newest first. Filing counts include every state submission that lists the edition.
| Edition | Filings | Companies | States | Filed |
|---|---|---|---|---|
| 06 08Jun 2008Latest | 55 | 46 | 7 | May 2022 to Aug 2026 |
2 other edition dates appear in one or two filings each, often carrier-specific versions: 06 06, 07 04.
What the filings show
- Edition in use: in the past 12 months, 30 companies filed the 06 08 edition.
- CU 27 03 (Supplemental Extended Reporting Period) is filed alongside it most often, in 48 of the same filings (84%).
Filed under
Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Aug 2026, excluding withdrawn and rejected filings. One filing can cover several affiliated companies.
Carriers filing this form
The 10 carrier groups with the most filings that include CU 21 55, out of 21 in total.
| Carrier | Filings | States | Editions, most filed first | Last filed |
|---|---|---|---|---|
| WR Berkley Corporation Group14 group companies filed it, led by Acadia Insurance Company and Continental Western Insurance Company | 9 | 1 | 06 08 | Jun 19, 2026 |
| Nationwide Corporation Group4 group companies filed it, led by Nationwide Agribusiness Insurance Company and Crestbrook Insurance Company | 8 | 3 | 06 08 | Jun 30, 2026 |
| Tokio Marine Holdings Incorporated Group2 group companies filed it, led by Safety National Casualty Corporation and Philadelphia Indemnity Insurance Company | 7 | 3 | 06 08 | Aug 11, 2026 |
| Church Mutual GroupChurch Mutual Insurance Company, S.I. | 5 | 2 | 06 08 | Jun 26, 2026 |
| Sompo GroupSompo America Insurance Company | 5 | 1 | 06 08 | Jun 15, 2026 |
| AU Holding Company GroupContinental Indemnity Company | 3 | 3 | 06 08 | May 3, 2024 |
| Ally Insurance Holdings GroupMotors Insurance Corporation | 2 | 2 | 06 08 | Mar 19, 2024 |
| American Family Insurance GroupMidvale Indemnity Company | 2 | 2 | 06 08 | Sep 28, 2023 |
| Markel Corporation GroupState National Insurance Company, Inc. | 2 | 2 | 06 0606 08 | May 30, 2023 |
| Munich RE Group3 group companies filed it, led by American Family Home Insurance Company and American Modern Home Insurance Company | 2 | 2 | 06 08 | Aug 12, 2026 |
How the largest insurers handle CU 21 55
Groups among the largest commercial umbrella and excess insurers that filed CU 21 55 or their own version in the past five years.
- Chubb Limited GroupUses CU 21 55 in 1 filing
- Berkshire Hathaway GroupUses CU 21 55 in 1 filing
- Fairfax Financial GroupUses CU 21 55 in 1 filing
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States
Number of filings that include CU 21 55 in each state, Oct 2021 to Aug 2026. Darker states have more filings.
Often filed with
Standard-style form numbers that appear in the same filings most often.
- CU 27 03Supplemental Extended Reporting Period48 filings
- CU 21 48Extended Reporting Period for Terrorism Coverage47 filings
- CU 27 04Supplemental Extended Reporting Periods for Specific Accidents, Products, Work or Locations47 filings
- CU 21 30Cap on Losses From Certified Acts of Terrorism46 filings
- CU 21 56Auto Exclusion of Terrorism Coverage46 filings
- CU 27 01Exclusion of Specific Accidents, Products, Work or Location46 filings
- CU 27 02Amendment - Extended Reporting Periods for Specific Accidents, Products, Work or Location46 filings
- CU 27 10Extended Reporting Period Endorsement For Employee Benefits Liability Coverage46 filings
- CU 21 23Nuclear Energy Liability Exclusion Endorsement45 filings
- CU 21 44Conditional Exclusion Of Terrorism (Relating To Disposition Of Federal Terrorism Risk Insurance Act)45 filings
Recent filings
Latest filings that include this form number. Filed copies open in FilingFocus.
| Submitted | Company | State | Editions | Tracking number |
|---|---|---|---|---|
| Aug 12, 2026 | American Family Home Insurance Companyand 1 more | GA | 06 08 | AMMH-135045858 |
| Aug 12, 2026 | Colonial Surety Company | SC | 06 08 | MRTN-134978915 |
| Aug 11, 2026 | Philadelphia Indemnity Insurance Company | SC | 06 08 | PHLX-135041545 |
| Jul 22, 2026 | Star Insurance Company | SC | 06 08 | ACCD-G134876003 |
| Jul 2, 2026 | Zenith Insurance Company | CA | 06 08 | ZICO-134998423 |
| Jun 30, 2026 | The Medical Protective Companyand 1 more | IL | 06 08 | MDPC-135002488 |
| Jun 30, 2026 | Crestbrook Insurance Companyand 1 more | CO | 06 08 | NWPP-135003098 |
| Jun 26, 2026 | Church Mutual Insurance Company, S.I. | CO | 06 08 | CHMU-134995025 |
| Jun 19, 2026 | Acadia Insurance Companyand 4 more | CO | 06 08 | BNIC-134992811 |
| Jun 19, 2026 | Berkley Casualty Companyand 8 more | CO | 06 08 | BNIC-134992815 |
| Jun 19, 2026 | Addison Insurance Companyand 1 more | CO | 06 08 | UNFG-134979875 |
| Jun 15, 2026 | Sompo America Insurance Company | CO | 06 08 | SMPJ-134971280 |
Most filed ISO CU forms
- CU 34 54 Exclusion - Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS)
- CU 21 86 Exclusion – Access Or Disclosure Of Confidential Or Personal Material Or Information
- CU 00 05 Exclusion - Violation of Law Addressing Data Privacy
- CU 34 56 Exclusion – Cyber Incident
- CU DS 01 Commercial Liability Umbrella Declarations
- CU 21 88 Exclusion - Access Or Disclosure Of Confidential Or Personal Material Or Information (Coverage B Only)
- CU 34 44 Broad Abuse or Molestation Exclusion
- CU 34 55 Exclusion - Electronic Data - Deletion Of Bodily Injury Exception
- CU 22 37 Motor Carrier Endorsement
- CU 21 87 Exclusion - Access Or Disclosure Of Confidential Or Personal Information and Data-Related Liability - Limited Bodily Injury Exception Not Included
- CU 04 02 Loss Of Electronic Data Resulting From Physical Injury To Tangible Property Liability Coverage - Subject To Cyber Incident Exclusion
- CU 04 54 Loss of Electronic Data Resulting From Physical Injury To Tangible Property Liability Coverage - Subject To Cyber Incident Exclusion - Deletion Of Bodily Injury Exception
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