Coverage description
An Insurance Services Office (ISO) standard form. It excludes inland marine loss caused by unauthorized computer access, malicious code or denial of service attacks, but still pays for resulting fire or explosion, and states that such a cyber incident is not vandalism.
Editions
Edition dates as filed, newest first. Filing counts include every state submission that lists the edition.
| Edition | Filings | Companies | States | Filed |
|---|---|---|---|---|
| 08 21Aug 2021Latest | 72 | 49 | 30 | Feb 2022 to Aug 2026 |
Filed by one company only: 12 23 (Southern Trust Insurance Company, 3 filings).
What the filings show
- Edition in use: in the past 12 months, 5 companies filed the 08 21 edition.
- The 12 23 edition appears only in filings from Southern Trust Insurance Company (3 filings in 2 states since Oct 19, 2023), which suggests a carrier-specific version.
- CM 99 09 (Cyber Incident Exclusion With Ensuing Cause(s) of Loss Exceptions) is filed alongside it most often, in 59 of the same filings (79%).
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Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Aug 2026, excluding withdrawn and rejected filings.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 CM 99 08, out of 29 in total.
| Carrier | Filings | States | Editions, most filed first | Last filed |
|---|---|---|---|---|
| Fairfax Financial Group3 group companies filed it, led by The North River Insurance Company and United States Fire Insurance Company | 24 | 21 | 08 21 | Jan 12, 2024 |
| WCF Mutual Insurance Company Group2 group companies filed it, led by Associated Indemnity Corporation and WCF National Insurance Company | 5 | 3 | 08 21 | Mar 26, 2024 |
| MS & AD Insurance Group3 group companies filed it, led by Transverse Insurance Company and Mitsui Sumitomo Insurance Company of America | 4 | 4 | 08 21 | Jun 9, 2025 |
| Sentry Insurance Group3 group companies filed it, led by Middlesex Insurance Company and Sentry Insurance a Mutual Company | 4 | 2 | 08 21 | Aug 26, 2024 |
| Southern Trust Insurance Company | 4 | 3 | 12 2308 21 | Nov 29, 2023 |
| Encova Mutual Insurance Group3 group companies filed it, led by Motorists Mutual Insurance Company and Wilson Mutual Insurance Company | 3 | 3 | 08 21 | Nov 15, 2024 |
| Amerisure Company Group2 group companies filed it, led by AMERISURE INSURANCE COMPANY and AMERISURE MUTUAL INSURANCE COMPANY | 2 | 2 | 08 21 | Feb 10, 2022 |
| Amtrust Financial Services Group3 group companies filed it, led by First Nonprofit Insurance Company and Republic Fire and Casualty Insurance Company | 2 | 1 | 08 21 | Feb 9, 2023 |
| Caterpillar GroupCaterpillar Insurance Company | 2 | 2 | 08 21 | Aug 16, 2024 |
| Church Mutual GroupChurch Mutual Insurance Company, S.I. | 2 | 1 | 08 21 | Dec 22, 2022 |
How the largest insurers handle CM 99 08
Groups among the largest commercial inland marine insurers that filed CM 99 08 or their own version in the past five years.
- Liberty Mutual GroupFiles its own version: DL 04 18 Cyber Incident Exclusion (3 states)
See more forms
Search related forms, compare editions, and research carrier filings with FilingFocus.
States
Number of filings that include CM 99 08 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.
- CM 99 09Cyber Incident Exclusion With Ensuing Cause(s) of Loss Exceptions59 filings
- CM 00 01Commercial Inland Marine Conditions28 filings
- CM 99 05Cannabis Exclusion27 filings
- IL 00 17Common Policy Conditions26 filings
- IL 09 35Exclusion of Certain Computer- Related Losses24 filings
- CM 99 06Cannabis Exclusion with Hemp Exception23 filings
- CM 00 26Physicians and Surgeons Equipment Coverage Form22 filings
- CM 00 66Accounts Receivable Coverage Form22 filings
- CM 26 03Artificially Generated Electric, Magnetic or Electromagnetic Energy Coverage22 filings
- CM 66 04Duplicate Records22 filings
Recent filings
Latest filings that include this form number. Filed copies open in FilingFocus.
| Submitted | Company | State | Editions | Tracking number |
|---|---|---|---|---|
| Aug 24, 2026 | AXIS Insurance Company | LA | 08 21 | AXSS-G135065365 |
| Aug 20, 2026 | New York Marine and General Insurance Company | SC | 08 21 | PERR-135060922 |
| May 15, 2026 | Brethren Mutual Insurance Company | WV | 08 21 | BRMT-134937905 |
| Jan 13, 2026 | Transguard Insurance Company of America, Inc. | SC | 08 21 | OCCD-134798099 |
| Dec 12, 2025 | Universal North America Insurance Company | SC | 08 21 | UNAC-134764087 |
| Dec 12, 2025 | Universal North America Insurance Company | NV | 08 21 | UNAC-134767023 |
| Jun 9, 2025 | Transverse Insurance Company | OH | 08 21 | TRIG-134539462 |
| Dec 24, 2024 | Explorer Insurance Companyand 2 more | CA | 08 21 | ICWG-134359558 |
| Nov 15, 2024 | Motorists Mutual Insurance Companyand 2 more | PA | 08 21 | MTRS-134318628 |
| Aug 29, 2024 | Greater Mid-Atlantic Indemnity Companyand 1 more | CT | 08 21 | GNYM-134231683 |
| Aug 26, 2024 | Sentry Select Insurance Company | CA | 08 21 | SEPX-134203770 |
| Aug 26, 2024 | Sentry Insurance a Mutual Company | CA | 08 21 | SEPX-134206291 |
Most filed ISO CM forms
- CM 00 01 Commercial Inland Marine Conditions
- CM 99 12 Exclusion of Loss Due to Virus or Bacteria
- CM DS 02 Advisory Commercial Inland Marine Declarations
- CM 00 66 Accounts Receivable Coverage Form
- CM 00 67 Valuable Papers and Records Coverage Form
- CM 99 09 Cyber Incident Exclusion With Ensuing Cause(s) of Loss Exceptions
- CM 00 26 Physicians And Surgeons Equipment Coverage Form
- CM 99 07 Cannabis Coverage
See more carrier forms
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