Coverage description
An Insurance Services Office (ISO) standard form. It removes the umbrella's exception for aircraft chartered, loaned or hired with a paid crew and not owned by an insured, so liability from such non-owned aircraft is excluded.
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 | 53 | 31 | 18 | May 2022 to Aug 2026 |
| 12 01Dec 2001 | 6 | 3 | 4 | Nov 2022 to Apr 2023 |
1 other edition date appears in one or two filings each, often carrier-specific versions: 04 92.
What the filings show
- Edition in use: in the past 12 months, 12 companies filed the 11 16 edition.
- CU 00 01 (Commercial Liability Umbrella Coverage Form) is filed alongside it most often, in 58 of the same filings (97%).
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Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Aug 2026, excluding withdrawn and rejected filings.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 24, out of 22 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 Group2 group companies filed it, led by Nationwide Agribusiness Insurance Company and Crestbrook Insurance Company | 7 | 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 |
| James River GroupFalls Lake National Insurance Company | 4 | 4 | 12 01 | Jan 13, 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 | 12 01 | Apr 17, 2023 |
| American Family Insurance GroupMidvale Indemnity Company | 2 | 2 | 11 16 | Sep 28, 2023 |
| Berkshire Hathaway Group2 group companies filed it, led by The Medical Protective Company and Wellfleet Insurance Company | 2 | 2 | 11 16 | Jun 30, 2026 |
How the largest insurers handle CU 21 24
Groups among the largest commercial umbrella and excess insurers that filed CU 21 24 or their own version in the past five years.
- Chubb Limited GroupUses CU 21 24 in 1 filing
- Berkshire Hathaway GroupUses CU 21 24 in 1 filing
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States
Number of filings that include CU 21 24 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 00 01Commercial Liability Umbrella Coverage Form58 filings
- CU 21 05Exclusion - Employees And Volunteer Workers As Insureds56 filings
- CU 21 43Exclusion - Designated Products56 filings
- CU 24 03Waiver Of Transfer Of Rights Of Recovery Against Others To Us (Waiver Of Subrogation)56 filings
- CU 24 78Noncontributory - Other Insurance Condition56 filings
- CU 21 07Contractual Liability Limitation55 filings
- CU 21 51Total Pollution Exclusion With A Hostile Fire Exception52 filings
- CU 21 52Total Pollution Exclusion With A Building Heating, Cooling And Dehumidifying Equipment Exception And A Hostile Fire Exception52 filings
- CU 21 15Exclusion - Financial Services51 filings
- CU 21 41Exclusion - Counseling Services51 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 |
| 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 |
| Feb 17, 2026 | Safety National Casualty Corporation | CO | 11 16 | SFCC-134815068 |
| Jan 5, 2026 | Mississippi Farm Bureau Casualty Insurance Company | MS | 11 16 | SFBC-134775309 |
| Nov 22, 2025 | The Medical Protective Companyand 1 more | WA | 11 16 | MDPC-134692417 |
| Nov 11, 2025 | Southern Farm Bureau Casualty Insurance Company | LA | 11 16 | SFBC-134733493 |
| Aug 18, 2025 | American States Insurance Company | WY | 04 92 | LBRC-134640495 |
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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