Coverage description
An Insurance Services Office (ISO) standard form. When the underlying insurance is an Auto Dealers Coverage Form, it excludes umbrella coverage for injury or damage sustained away from your dealer locations that arises out of your products or your work.
Editions
Edition dates as filed, newest first. Filing counts include every state submission that lists the edition.
| Edition | Filings | Companies | States | Filed |
|---|---|---|---|---|
| 09 18Sep 2018Latest | 50 | 41 | 18 | Apr 2022 to Aug 2026 |
What the filings show
- Edition in use: in the past 12 months, 17 companies filed the 09 18 edition.
- CU 24 16 (Auto Dealers Broad Form Products Coverage) is filed alongside it most often, in 47 of the same filings (94%).
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Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Aug 2026, excluding withdrawn and rejected filings.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 66, out of 18 in total.
| Carrier | Filings | States | Editions, most filed first | Last filed |
|---|---|---|---|---|
| Grinnell Mutual GroupGrinnell Mutual Reinsurance Company | 9 | 9 | 09 18 | Mar 22, 2023 |
| Tokio Marine Holdings Incorporated Group2 group companies filed it, led by Safety National Casualty Corporation and Philadelphia Indemnity Insurance Company | 7 | 3 | 09 18 | Aug 11, 2026 |
| Grange Mutual CAS GroupGrange Insurance Company | 6 | 6 | 09 18 | Mar 26, 2024 |
| Church Mutual GroupChurch Mutual Insurance Company, S.I. | 5 | 2 | 09 18 | Jun 26, 2026 |
| Sompo GroupSompo America Insurance Company | 5 | 1 | 09 18 | Jun 15, 2026 |
| American Family Insurance GroupMidvale Indemnity Company | 2 | 2 | 09 18 | Sep 28, 2023 |
| Amtrust Financial Services Group7 group companies filed it, led by AmTrust Insurance Company of Kansas, Inc. and CorePointe Insurance Company | 2 | 1 | 09 18 | Aug 8, 2023 |
| Berkshire Hathaway Group2 group companies filed it, led by The Medical Protective Company and Wellfleet Insurance Company | 2 | 2 | 09 18 | Jun 30, 2026 |
| Mountain West Farm GroupMountain West Farm Bureau Mutual Insurance Company | 2 | 2 | 09 18 | Oct 16, 2023 |
| WR Berkley Corporation Group9 group companies filed it, led by Berkley Casualty Company and Berkley Insurance Company | 2 | 1 | 09 18 | Jun 19, 2026 |
How the largest insurers handle CU 21 66
Groups among the largest commercial umbrella and excess insurers that filed CU 21 66 or their own version in the past five years.
- Berkshire Hathaway GroupUses CU 21 66 in 1 filing
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States
Number of filings that include CU 21 66 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 24 16Auto Dealers Broad Form Products Coverage47 filings
- CU 24 19Lessor - Additional Insured And Loss Payee47 filings
- CU 22 18Optical And Hearing Aid Establishments45 filings
- CU 24 15Fellow Employee Auto Coverage For Designated Employees/Positions45 filings
- CU 24 18Repossessed Autos45 filings
- CU 21 01Exclusion - Athletic Or Sports Participants44 filings
- CU 21 08Exclusion - Intercompany Products Suits44 filings
- CU 22 20Pharmacists44 filings
- CU 22 21Colleges Or Schools44 filings
- CU 22 29Leasing Or Rental Concerns - Schedule Of Limits For Owned Autos44 filings
Recent filings
Latest filings that include this form number. Filed copies open in FilingFocus.
| Submitted | Company | State | Editions | Tracking number |
|---|---|---|---|---|
| Aug 11, 2026 | Philadelphia Indemnity Insurance Company | SC | 09 18 | PHLX-135041545 |
| Jun 30, 2026 | The Medical Protective Companyand 1 more | IL | 09 18 | MDPC-135002488 |
| Jun 26, 2026 | Church Mutual Insurance Company, S.I. | CO | 09 18 | CHMU-134995025 |
| Jun 19, 2026 | Berkley Casualty Companyand 8 more | CO | 09 18 | BNIC-134992815 |
| Jun 19, 2026 | Addison Insurance Companyand 1 more | CO | 09 18 | UNFG-134979875 |
| Jun 15, 2026 | Sompo America Insurance Company | CO | 09 18 | SMPJ-134971280 |
| Jun 2, 2026 | Philadelphia Indemnity Insurance Company | IL | 09 18 | PHLX-134967828 |
| Feb 17, 2026 | Safety National Casualty Corporation | CO | 09 18 | SFCC-134815068 |
| Nov 22, 2025 | The Medical Protective Companyand 1 more | WA | 09 18 | MDPC-134692417 |
| Jul 1, 2025 | Berkley Casualty Companyand 8 more | CO | 09 18 | BNIC-134587731 |
| Jun 27, 2025 | Church Mutual Insurance Company, S.I. | CO | 09 18 | CHMU-134582751 |
| Jun 27, 2025 | Next Insurance US Company | CA | 09 18 | NXUS-134584662 |
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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