Coverage description
An Insurance Services Office (ISO) standard form. It excludes umbrella coverage for any injury or damage arising directly or indirectly out of a certified act of terrorism, as certified under the federal Terrorism Risk Insurance Act.
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 editionA certified act of terrorism no longer requires the concurrence of the Secretary of State and the Attorney General. Certification follows the provisions of the Terrorism Risk Insurance Act.
01 08
“in concurrence with the Secretary of State and the Attorney General of the United States”
01 15
“in accordance with the provisions of the federal Terrorism Risk Insurance Act”
A new provision states that the terms of any terrorism exclusion, or the lack of one, do not create coverage for injury or damage that is otherwise excluded.
01 08
Not in this edition
01 15
“do not serve to create coverage for injury or damage that is otherwise excluded”
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 | 60 | 37 | 15 | May 2022 to Aug 2026 |
| 01 08Jan 2008 | 7 | 4 | 5 | Nov 2022 to Sep 2024 |
What the filings show
- Edition in use: in the past 12 months, 25 companies filed the 01 15 edition.
- CU 21 30 (Cap On Losses From Certified Acts Of Terrorism) is filed alongside it most often, in 62 of the same filings (93%).
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Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Aug 2026, excluding withdrawn and rejected filings.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 33, out of 19 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 | 14 | 13 | 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 |
| 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 |
| Nationwide Corporation Group2 group companies filed it, led by Crestbrook Insurance Company and Nationwide Agribusiness Insurance Company | 5 | 1 | 01 15 | Jun 30, 2026 |
| Sompo GroupSompo America Insurance Company | 5 | 1 | 01 15 | Jun 15, 2026 |
| James River GroupFalls Lake National Insurance Company | 4 | 4 | 01 08 | Jan 13, 2023 |
| AU Holding Company Group2 group companies filed it, led by Continental Indemnity Company and Pennsylvania Insurance Company | 3 | 3 | 01 15 | May 6, 2024 |
| 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 33
Groups among the largest commercial umbrella and excess insurers that filed CU 21 33 or their own version in the past five years.
- Chubb Limited GroupUses CU 21 33 in 1 filing
- Berkshire Hathaway GroupUses CU 21 33 in 1 filing
- Fairfax Financial GroupUses CU 21 33 in 1 filing
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States
Number of filings that include CU 21 33 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 30Cap On Losses From Certified Acts Of Terrorism62 filings
- CU 21 36Exclusion Of Punitive Damages Related To A Certified Act Of Terrorism60 filings
- IL 00 17Common Policy Conditions55 filings
- CU 21 44Conditional Exclusion Of Terrorism (Relating To Disposition Of Federal Terrorism Risk Insurance Act)54 filings
- CU 21 40Exclusion of Certified Nuclear, Biological, Chemical or Radiological Acts of Terrorism; Cap on Losses From Certified Acts of Terrorism46 filings
- CU 21 35Exclusion Of Certified Acts Of Terrorism And Exclusion Of Other Acts Of Terrorism Committed Outside The United States45 filings
- CU 00 01Commercial Liability Umbrella Coverage Form43 filings
- CU 21 00Exclusion - All Hazards in Connection with Designated Premises43 filings
- CU 21 09Exclusion - Explosion, Collapse and Underground Property Damage Hazard (Specified Operations)43 filings
- CU 21 16Exclusion - Designated Ongoing Operations43 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 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 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 |
| Feb 17, 2026 | Safety National Casualty Corporation | CO | 01 15 | SFCC-134815068 |
| Nov 22, 2025 | The Medical Protective Companyand 1 more | WA | 01 15 | MDPC-134692417 |
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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