Coverage description
An Insurance Services Office (ISO) standard form. It excludes umbrella coverage for repossessed autos except while you are repossessing them, holding them for sale or awaiting delivery after sale, can cap coverage at a scheduled each occurrence limit, and makes the person whose auto was repossessed not an insured.
How the form has changed
The 09 18 edition updates the schedule layout and form date. The coverage wording is the same as 12 01.
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 | 48 | 33 | 16 | Apr 2022 to Oct 2026 |
| 12 01Dec 2001 | 7 | 3 | 2 | Jun 2022 to Jun 2026 |
What the filings show
- Edition in use: in the past 12 months, 12 companies filed the 09 18 edition and 2 companies filed 12 01.
- CU 24 15 (Fellow Employee Auto Coverage For Designated Employees/Positions) is filed alongside it most often, in 55 of the same filings (100%).
Filed under
Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Oct 2026, excluding withdrawn and rejected filings.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 24 18, out of 19 in total.
| Carrier | Filings | States | Editions, most filed first | Last filed |
|---|---|---|---|---|
| Grinnell Mutual GroupGrinnell Mutual Reinsurance Company | 9 | 9 | 09 18 | Mar 22, 2023 |
| Nationwide Corporation Group3 group companies filed it, led by Nationwide Agribusiness Insurance Company and Crestbrook Insurance Company | 7 | 2 | 12 01 | 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 | 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 |
| Amtrust Financial Services Group7 group companies filed it, led by Security National Insurance Company and Technology Insurance Company, Inc. | 3 | 2 | 09 18 | Oct 15, 2026 |
| Berkshire Hathaway Group2 group companies filed it, led by The Medical Protective Company and Wellfleet Insurance Company | 2 | 2 | 09 18 | Jun 30, 2026 |
| AU Holding Company GroupContinental Indemnity Company | 1 | 1 | 09 18 | May 25, 2023 |
| American Family Insurance GroupMidvale Indemnity Company | 1 | 1 | 09 18 | Sep 28, 2023 |
How the largest insurers handle CU 24 18
Groups among the largest commercial umbrella and excess insurers that filed CU 24 18 or their own version in the past five years.
- Chubb Limited GroupUses CU 24 18 in 1 filing
- Berkshire Hathaway GroupUses CU 24 18 in 1 filing
- Fairfax Financial GroupUses CU 24 18 in 1 filing
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States
Number of filings that include CU 24 18 in each state, Oct 2021 to Oct 2026. Darker states have more filings.
Often filed with
Standard-style form numbers that appear in the same filings most often.
- CU 24 15Fellow Employee Auto Coverage For Designated Employees/Positions55 filings
- CU 24 19Lessor - Additional Insured And Loss Payee53 filings
- CU 22 29Leasing Or Rental Concerns - Schedule Of Limits For Owned Autos52 filings
- CU 21 01Exclusion - Athletic Or Sports Participants51 filings
- CU 21 08Exclusion - Intercompany Products Suits51 filings
- CU 21 17Exclusion - Designated Operations Covered By A Consolidated (Wrap-Up) Insurance Program51 filings
- CU 22 18Optical And Hearing Aid Establishments51 filings
- CU 22 21Colleges or Schools51 filings
- CU 22 39Driving Schools - Non- Owned Autos51 filings
- CU 24 03Waiver Of Transfer Of Rights Of Recovery Against Others To Us (Waiver Of Subrogation)51 filings
Recent filings
Latest filings that include this form number. Filed copies open in FilingFocus.
| Submitted | Company | State | Editions | Tracking number |
|---|---|---|---|---|
| Oct 15, 2026 | Security National Insurance Companyand 2 more | CA | 09 18 | UNKP-135059588 |
| Aug 11, 2026 | Philadelphia Indemnity Insurance Company | SC | 09 18 | PHLX-135041545 |
| Jul 2, 2026 | Zenith Insurance Company | CA | 09 18 | ZICO-134998423 |
| Jun 30, 2026 | The Medical Protective Companyand 1 more | IL | 09 18 | MDPC-135002488 |
| Jun 30, 2026 | Crestbrook Insurance Companyand 1 more | CO | 12 01 | NWPP-135003098 |
| Jun 26, 2026 | Church Mutual Insurance Company, S.I. | CO | 09 18 | CHMU-134995025 |
| 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 |
| Jun 27, 2025 | Church Mutual Insurance Company, S.I. | CO | 09 18 | CHMU-134582751 |
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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