Coverage description
An Insurance Services Office (ISO) standard form. It caps the insurer's liability for certified acts of terrorism under the umbrella once federal Terrorism Risk Insurance Act losses exceed $100 billion in a year, with losses up to that amount subject to pro rata allocation.
How the form has changed
2 changes across 1 revision, newest first. Each edition is compared with the one before it, using wording from filed copies.
01 15 edition
Jan 2015, compared with 01 08Latest editionCertification of a terrorist act is now by the Secretary of the Treasury under the Act, without requiring concurrence of the Secretary of State and the Attorney General.
01 08
“in concurrence with the Secretary of State and the Attorney General”
01 15
“in accordance with the provisions of the federal Terrorism Risk Insurance Act”
A new paragraph states that the terms of any terrorism exclusion, or its absence, do not create coverage for injury or damage otherwise excluded.
01 08
Not in this edition
01 15
“do not serve to create coverage for injury or damage that is otherwise excluded under this Coverage Part”
Editions
Edition dates as filed, newest first. Filing counts include every state submission that lists the edition.
| Edition | Filings | Companies | States | Filed |
|---|---|---|---|---|
| 01 15Jan 2015Latest | 68 | 50 | 15 | May 2022 to Aug 2026 |
| 01 08Jan 2008 | 5 | 3 | 4 | Nov 2022 to Apr 2023 |
What the filings show
- Edition in use: in the past 12 months, 30 companies filed the 01 15 edition.
- CU 21 33 (Exclusion Of Certified Acts Of Terrorism) is filed alongside it most often, in 62 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Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Aug 2026, excluding withdrawn and rejected filings.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 21 30, out of 26 in total.
| Carrier | Filings | States | Editions, most filed first | Last filed |
|---|---|---|---|---|
| Markel Corporation Group2 group companies filed it, led by State National Insurance Company, Inc. and Alterra America Insurance Company | 12 | 12 | 01 15 | Oct 5, 2023 |
| WR Berkley Corporation Group14 group companies filed it, led by Acadia Insurance Company and Continental Western Insurance Company | 9 | 1 | 01 15 | Jun 19, 2026 |
| Nationwide Corporation Group3 group companies filed it, led by Nationwide Agribusiness Insurance Company and Crestbrook Insurance Company | 7 | 2 | 01 15 | 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 | 01 15 | Aug 11, 2026 |
| Church Mutual GroupChurch Mutual Insurance Company, S.I. | 5 | 2 | 01 15 | Jun 26, 2026 |
| Sompo GroupSompo America Insurance Company | 5 | 1 | 01 15 | Jun 15, 2026 |
| AU Holding Company Group2 group companies filed it, led by Continental Indemnity Company and Pennsylvania Insurance Company | 3 | 3 | 01 15 | May 6, 2024 |
| James River GroupFalls Lake National Insurance Company | 3 | 3 | 01 08 | Jan 13, 2023 |
| American European Group2 group companies filed it, led by American European Insurance Company and Rutgers Casualty Ins Co | 2 | 2 | 01 08 | Apr 17, 2023 |
| American Family Insurance GroupMidvale Indemnity Company | 2 | 2 | 01 15 | Sep 28, 2023 |
How the largest insurers handle CU 21 30
Groups among the largest commercial umbrella and excess insurers that filed CU 21 30 or their own version in the past five years.
- Chubb Limited GroupUses CU 21 30 in 1 filing
- Berkshire Hathaway GroupUses CU 21 30 in 1 filing
- WR Berkley Corporation GroupFiles its own version: BHFL-XS-S-1018 Cap On Losses From Certified Acts Of Terrorism (34 states)
- Fairfax Financial GroupUses CU 21 30 in 1 filing
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States
Number of filings that include CU 21 30 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 33Exclusion Of Certified Acts Of Terrorism62 filings
- CU 21 36Exclusion Of Punitive Damages Related To A Certified Act Of Terrorism58 filings
- IL 00 17Common Policy Conditions58 filings
- CU 21 44Conditional Exclusion of Terrorism (Relating to Disposition of Federal Terrorism Risk Insurance Act)56 filings
- CU 00 01Commercial Liability Umbrella Coverage Form48 filings
- CU 21 23Nuclear Energy Liability Exclusion Endorsement48 filings
- CU 21 35Exclusion Of Certified Acts Of Terrorism And Exclusion Of Other Acts Of Terrorism Committed Outside The United States46 filings
- CU 21 55Amended Terrorism Coverage - Covered Autos46 filings
- CU 27 10Extended Reporting Period Endorsement For Employee Benefits Liability Coverage46 filings
- CU 21 00Exclusion - All Hazards in Connection with Designated Premises45 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 | 01 15 | PHLX-135041545 |
| Jul 22, 2026 | Star Insurance Company | SC | 01 15 | ACCD-G134876003 |
| Jul 2, 2026 | Zenith Insurance Company | CA | 01 15 | ZICO-134998423 |
| Jun 30, 2026 | The Medical Protective Companyand 1 more | IL | 01 15 | MDPC-135002488 |
| Jun 30, 2026 | Crestbrook Insurance Companyand 1 more | CO | 01 15 | NWPP-135003098 |
| Jun 26, 2026 | Church Mutual Insurance Company, S.I. | CO | 01 15 | CHMU-134995025 |
| Jun 24, 2026 | CopperPoint Casualty Insurance Companyand 1 more | SC | 01 15 | COPP-134996381 |
| Jun 19, 2026 | Acadia Insurance Companyand 4 more | CO | 01 15 | BNIC-134992811 |
| Jun 19, 2026 | Berkley Casualty Companyand 8 more | CO | 01 15 | BNIC-134992815 |
| Jun 19, 2026 | Addison Insurance Companyand 1 more | CO | 01 15 | UNFG-134979875 |
| Jun 15, 2026 | Sompo America Insurance Company | CO | 01 15 | SMPJ-134971280 |
| Jun 2, 2026 | Philadelphia Indemnity Insurance Company | IL | 01 15 | PHLX-134967828 |
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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