Coverage description
An Insurance Services Office (ISO) standard form. It makes the umbrella not seek contribution from other insurance of an additional insured shown in the Schedule when that party is a Named Insured on the other policy and you agreed to this in a written contract.
Editions
Edition dates as filed, newest first. Filing counts include every state submission that lists the edition.
| Edition | Filings | Companies | States | Filed |
|---|---|---|---|---|
| 11 16Nov 2016Latest | 67 | 35 | 23 | May 2022 to Aug 2026 |
What the filings show
- Edition in use: in the past 12 months, 15 companies filed the 11 16 edition.
- CU 21 43 (Exclusion - Designated Products) is filed alongside it most often, in 57 of the same filings (85%).
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Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Aug 2026, excluding withdrawn and rejected filings.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 24 78, out of 24 in total.
| Carrier | Filings | States | Editions, most filed first | Last filed |
|---|---|---|---|---|
| Grinnell Mutual GroupGrinnell Mutual Reinsurance Company | 9 | 9 | 11 16 | Mar 22, 2023 |
| Nationwide Corporation Group3 group companies filed it, led by Nationwide Agribusiness Insurance Company and Crestbrook Insurance Company | 8 | 2 | 11 16 | 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 | 11 16 | Aug 11, 2026 |
| Church Mutual GroupChurch Mutual Insurance Company, S.I. | 5 | 2 | 11 16 | Jun 26, 2026 |
| Sompo GroupSompo America Insurance Company | 5 | 1 | 11 16 | Jun 15, 2026 |
| Celina GroupThe Celina Mutual Insurance Company | 4 | 4 | 11 16 | Aug 14, 2025 |
| James River GroupFalls Lake National Insurance Company | 4 | 4 | 11 16 | Jan 13, 2023 |
| Indiana Farmers Mutual GroupIndiana Farmers Mutual Insurance Company | 3 | 3 | 11 16 | Aug 23, 2023 |
| AU Holding Company GroupContinental Indemnity Company | 2 | 2 | 11 16 | May 3, 2024 |
| American European Group2 group companies filed it, led by American European Insurance Company and Rutgers Casualty Ins Co | 2 | 2 | 11 16 | Apr 17, 2023 |
How the largest insurers handle CU 24 78
Groups among the largest commercial umbrella and excess insurers that filed CU 24 78 or their own version in the past five years.
- Chubb Limited GroupUses CU 24 78 in 1 filing
- Berkshire Hathaway GroupUses CU 24 78 in 1 filing
- Fairfax Financial GroupUses CU 24 78 in 1 filing
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States
Number of filings that include CU 24 78 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 21 43Exclusion - Designated Products57 filings
- CU 00 01Commercial Liability Umbrella Coverage Form56 filings
- CU 21 24Exclusion - Non-Owned Aircraft56 filings
- CU 24 03Waiver Of Transfer Of Rights Of Recovery Against Others To Us (Waiver Of Subrogation)56 filings
- CU 21 05Exclusion - Employees And Volunteer Workers As Insureds55 filings
- CU 21 07Contractual Liability Limitation55 filings
- CU 24 23Coverage For Professional Services54 filings
- CU 21 49Exclusion - Professional Veterinarian Services53 filings
- CU 21 52Total Pollution Exclusion with a Building Heating, Cooling and Dehumidifying Equipment Exception and a Hostile Fire Exception52 filings
- CU 21 75Exclusion - Insurance And Related Operations52 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 | 11 16 | PHLX-135041545 |
| Jul 2, 2026 | Zenith Insurance Company | CA | 11 16 | ZICO-134998423 |
| Jun 30, 2026 | The Medical Protective Companyand 1 more | IL | 11 16 | MDPC-135002488 |
| Jun 30, 2026 | Crestbrook Insurance Companyand 1 more | CO | 11 16 | NWPP-135003098 |
| Jun 26, 2026 | Church Mutual Insurance Company, S.I. | CO | 11 16 | CHMU-134995025 |
| Jun 19, 2026 | Addison Insurance Companyand 1 more | CO | 11 16 | UNFG-134979875 |
| Jun 15, 2026 | Sompo America Insurance Company | CO | 11 16 | SMPJ-134971280 |
| Jun 2, 2026 | Philadelphia Indemnity Insurance Company | IL | 11 16 | PHLX-134967828 |
| Apr 29, 2026 | Illinois EMCASCO Insurance Company | SC | 11 16 | EMCC-134929535 |
| Feb 17, 2026 | Safety National Casualty Corporation | CO | 11 16 | SFCC-134815068 |
| Jan 28, 2026 | Truck Insurance Exchange | IL | 11 16 | FARM-134815661 |
| Jan 5, 2026 | Mississippi Farm Bureau Casualty Insurance Company | MS | 11 16 | SFBC-134775309 |
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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