Coverage description
An Insurance Services Office (ISO) standard form. It excludes injury or damage from certified acts of terrorism involving nuclear, radiological, biological or chemical materials, and limits the insurer's liability if certified terrorism losses exceed $100 billion in a year.
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 is now certified by the Secretary of the Treasury under the Terrorism Risk Insurance Act, without the 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”
The statement that the endorsement does not create coverage for otherwise excluded injury or damage now covers any terrorism exclusion, or its absence, not just certified acts outside this exclusion.
01 08
“that is not subject to this exclusion”
01 15
“or the inapplicability or omission of a terrorism exclusion”
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 | 47 | 35 | 8 | May 2022 to Aug 2026 |
| 01 08Jan 2008 | 4 | 2 | 3 | Nov 2022 to Apr 2023 |
1 other edition date appears in one or two filings each, often carrier-specific versions: 12 02.
What the filings show
- Edition in use: in the past 12 months, 25 companies filed the 01 15 edition.
- CU 21 36 (Exclusion Of Punitive Damages Related To A Certified Act Of Terrorism) is filed alongside it most often, in 51 of the same filings (98%).
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Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Aug 2026, excluding withdrawn and rejected filings.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 40, out of 18 in total.
| Carrier | Filings | States | Editions, most filed first | Last filed |
|---|---|---|---|---|
| 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 |
| 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 | Nov 21, 2022 |
| American Family Insurance GroupMidvale Indemnity Company | 2 | 2 | 01 15 | Sep 28, 2023 |
| Encova Mutual Insurance Group3 group companies filed it, led by Motorists Mutual Insurance Company and Wilson Mutual Insurance Company | 2 | 2 | 01 15 | Jun 25, 2024 |
| Southern Farm Bureau CAS Group2 group companies filed it, led by Mississippi Farm Bureau Casualty Insurance Company and Southern Farm Bureau Casualty Insurance Company | 2 | 2 | 01 15 | Jan 5, 2026 |
How the largest insurers handle CU 21 40
Groups among the largest commercial umbrella and excess insurers that filed CU 21 40 or their own version in the past five years.
- Fairfax Financial GroupUses CU 21 40 in 1 filing
See more forms
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States
Number of filings that include CU 21 40 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 36Exclusion Of Punitive Damages Related To A Certified Act Of Terrorism51 filings
- CU 21 35Exclusion Of Certified Acts Of Terrorism And Exclusion Of Other Acts Of Terrorism Committed Outside The United States47 filings
- CU 21 33Exclusion Of Certified Acts Of Terrorism46 filings
- CU 21 30Cap On Losses From Certified Acts Of Terrorism45 filings
- CU 21 44Conditional Exclusion Of Terrorism (Relating To Disposition Of Federal Terrorism Risk Insurance Act)44 filings
- CU 21 31Exclusion of Other Acts of Terrorism Committed Outside the United States; Cap on Losses From Certified Acts of Terrorism43 filings
- CU 21 45Conditional Exclusion of Terrorism Involving Nuclear, Biological or Chemical Terrorism (Relating to Disposition of Federal Terrorism Risk Insurance Act)42 filings
- CU 21 55Amended Terrorism Coverage - Covered Autos41 filings
- CU 27 10Extended Reporting Period Endorsement For Employee Benefits Liability Coverage41 filings
- CU 21 47Exclusion Of Terrorism Involving Nuclear, Biological Or Chemical Terrorism40 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 | 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 |
| Jan 5, 2026 | Mississippi Farm Bureau Casualty Insurance Company | MS | 01 15 | SFBC-134775309 |
| Nov 11, 2025 | Southern Farm Bureau Casualty Insurance Company | LA | 01 15 | SFBC-134733493 |
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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