Coverage description
An Insurance Services Office (ISO) standard form. It removes employees and volunteer workers as insureds and excludes injury or damage from aircraft, autos or watercraft they operate for the insured's business. It also removes medical payments for injury to any insured.
How the form has changed
1 change across 1 revision, newest first. Each edition is compared with the one before it, using wording from filed copies.
12 25 edition
Dec 2025, compared with 12 19Latest editionThe broader employee and volunteer worker auto, aircraft and watercraft exclusion now also applies when endorsement CG 24 55 is attached to the policy.
12 19
“CG 24 50 or CG 24 51 is attached”
12 25
“CG 24 51 or CG 24 55 is attached”
Editions
Edition dates as filed, newest first. Filing counts include every state submission that lists the edition.
| Edition | Filings | Companies | States | Filed |
|---|---|---|---|---|
| 12 25Dec 2025Latest | 63 | 18 | 40 | Jul 2024 to Aug 2026 |
| 12 19Dec 2019 | 149 | 75 | 35 | Nov 2021 to Oct 2026 |
| 06 15Jun 2015 | 31 | 24 | 15 | Jan 2022 to Jun 2026 |
| 10 01Oct 2001 | 11 | 7 | 9 | Dec 2021 to Aug 2025 |
2 other edition dates appear in one or two filings each, often carrier-specific versions: 03 97, 10/1/2020.
Where filings record what this form replaced, they name earlier editions 06 15, 12 19. Only some filings record replacements.
What the filings show
- Edition in use: in the past 12 months, 28 companies filed the 12 19 edition and 12 companies filed 12 25.
- The newer 12 25 edition first appears Jul 12, 2024 and has been filed by 18 companies in 40 states so far.
- CG 21 66 (Exclusion - Volunteer Workers as Insureds) is filed alongside it most often, in 243 of the same filings (97%).
Filed under
Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Oct 2026, excluding withdrawn and rejected filings.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 CG 21 37, out of 56 in total.
| Carrier | Filings | States | Editions, most filed first | Last filed |
|---|---|---|---|---|
| Insurance Services Office, Inc.Advisory Organization | 37 | 37 | 12 25 | Apr 9, 2025 |
| Cincinnati Financial Group3 group companies filed it, led by The Cincinnati Casualty Company and The Cincinnati Indemnity Company | 34 | 23 | 12 2512 1906 15 | Aug 26, 2026 |
| WCF Mutual Insurance Company GroupAssociated Indemnity Corporation | 16 | 16 | 12 19 | Jan 15, 2026 |
| Berkshire Hathaway Group2 group companies filed it, led by Berkshire Hathaway Homestate Insurance Company and Redwood Fire and Casualty Insurance Company | 10 | 10 | 06 1510 01 | Jan 9, 2023 |
| Merchants Mutual Group2 group companies filed it, led by Merchants Preferred Insurance Company and Merchants Mutual Insurance Company | 10 | 5 | 12 19 | Dec 8, 2025 |
| Nationwide Corporation Group8 group companies filed it, led by Allied Insurance Company of America and Nationwide Agribusiness Insurance Company | 10 | 3 | 06 1512 19 | Feb 12, 2025 |
| Markel Corporation Group2 group companies filed it, led by State National Insurance Company, Inc. and Markel Insurance Company | 9 | 4 | 12 1910 01 | Oct 22, 2026 |
| Tokio Marine Holdings Incorporated Group4 group companies filed it, led by Safety National Casualty Corporation and TNUS Insurance Company | 8 | 2 | 12 19 | Feb 17, 2026 |
| Siriuspoint GroupSiriusPoint America Insurance Company | 7 | 2 | 12 1912 25 | Jun 15, 2026 |
| Sompo GroupSompo America Insurance Company | 7 | 2 | 12 19 | Jun 18, 2026 |
How the largest insurers handle CG 21 37
Groups among the largest commercial general liability insurers that filed CG 21 37 or their own version in the past five years.
- Berkshire Hathaway GroupUses CG 21 37 in 10 filings
- WR Berkley Corporation GroupUses CG 21 37 in 1 filing
- Fairfax Financial GroupUses CG 21 37 in 2 filings
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States
Number of filings that include CG 21 37 in each state, Oct 2021 to Oct 2026. Darker states have more filings.
Often filed with
Standard-style form numbers that appear in the same filings most often.
- CG 21 66Exclusion - Volunteer Workers as Insureds243 filings
- CG 22 69Pharmacists191 filings
- CG 21 44Limitation of Coverage to Designated Premises, Project or Operation186 filings
- CG 22 97Pharmacists – Broadened Coverage185 filings
- CG 21 06Exclusion - Access or Disclosure of Confidential or Personal Information and Data-Related Liability - with Limited Bodily Injury Exception184 filings
- CG 00 01Commercial General Liability Coverage Form180 filings
- CG 40 16Cannabis Exclusion with Hemp and Lessors Risk Exceptions177 filings
- CG 40 14Cannabis Exclusion176 filings
- CG 40 15Cannabis Exclusion with Hemp Exception173 filings
- CG 21 47Employment- Related Practices Exclusion172 filings
Recent filings
Latest filings that include this form number. Filed copies open in FilingFocus.
| Submitted | Company | State | Editions | Tracking number |
|---|---|---|---|---|
| Oct 22, 2026 | State National Insurance Company, Inc. | CO | 12 19 | STNA-135128706 |
| Oct 6, 2026 | American Casualty Company of Reading, Pennsylvaniaand 5 more | CA | 12 19 | CNAB-135091690 |
| Aug 26, 2026 | The Cincinnati Casualty Companyand 2 more | NV | 12 25 | CNNA-134980601 |
| Aug 26, 2026 | The Cincinnati Casualty Companyand 2 more | ID | 12 25 | CNNA-134992231 |
| Aug 17, 2026 | Mississippi Farm Bureau Casualty Insurance Company | MS | 12 19 | SFBC-135017175 |
| Jul 10, 2026 | Southern Farm Bureau Casualty Insurance Company | LA | 12 19 | SFBC-135013358 |
| Jul 10, 2026 | Trisura Insurance Company | WA | 12 19 | SHNF-134976660 |
| Jun 30, 2026 | Trisura Insurance Company | IL | 12 19 | SHNF-134983369 |
| Jun 26, 2026 | Church Mutual Insurance Company, S.I. | CO | 12 19 | CHMU-134947220 |
| Jun 24, 2026 | Southern Trust Insurance Company | GA | 12 19 | STTR-134864949 |
| Jun 18, 2026 | Sompo America Insurance Company | CO | 12 19 | SMPJ-134985965 |
| Jun 17, 2026 | Atlantic Specialty Insurance Company | NM | 12 2512 1906 15 | BEAC-134983795 |
Most filed ISO CG forms
- CG 40 32 Exclusion - Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS)
- CG 21 06 Exclusion - Access Or Disclosure Of Confidential Or Personal Material Or Information
- CG 20 10 Additional Insured - Owners, Lessees or Contractors - Scheduled Person or Organization Endorsement
- CG DS 01 Commercial General Liability Declarations
- CG 20 26 Additional Insured - Designated Person or Organization Endorsement
- CG 00 01 Commercial General Liability Coverage Form
- CG 20 37 Additional Insured - Owners, Lessees or Contractors - Completed Operations Endorsement
- CG 40 28 Broad Abuse or Molestation Exclusion
- CG 20 28 Additional Insured - Lessor of Leased Equipment
- CG 20 11 Additional Insured - Managers or Lessors of Premises
- CG 21 47 Employment-Related Practices Exclusion
- CG 04 35 Employee Benefits Liability Coverage
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