Coverage description
An Insurance Services Office (ISO) standard form. It provides a supplemental extended reporting period under the underground storage tank policy for an added premium, with a separate supplemental aggregate limit and defense expense amount equal to those in effect at the end of the policy period.
Editions
Edition dates as filed, newest first. Filing counts include every state submission that lists the edition.
| Edition | Filings | Companies | States | Filed |
|---|---|---|---|---|
| 11 94Nov 1994Latest | 79 | 52 | 10 | Nov 2021 to Oct 2026 |
What the filings show
- Edition in use: in the past 12 months, 12 companies filed the 11 94 edition.
- CG 27 05 (Exclusion of Specific Accidents, Products, Work or Locations (for Use with Products Claims-Made Policies)) is filed alongside it most often, in 76 of the same filings (96%).
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Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Oct 2026, excluding withdrawn and rejected filings.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 30 57, out of 31 in total.
| Carrier | Filings | States | Editions, most filed first | Last filed |
|---|---|---|---|---|
| Siriuspoint GroupSiriusPoint America Insurance Company | 8 | 3 | 11 94 | Jun 15, 2026 |
| Cincinnati Financial Group3 group companies filed it, led by The Cincinnati Casualty Company and The Cincinnati Indemnity Company | 7 | 3 | 11 94 | Jun 26, 2026 |
| Liberty Mutual Group5 group companies filed it, led by State Automobile Mutual Insurance Company and American Fire and Casualty Company | 6 | 2 | 11 94 | Jun 17, 2026 |
| Markel Corporation GroupState National Insurance Company, Inc. | 6 | 3 | 11 94 | Oct 22, 2026 |
| Nationwide Corporation Group7 group companies filed it, led by Allied Insurance Company of America and Nationwide Agribusiness Insurance Company | 6 | 3 | 11 94 | Feb 12, 2025 |
| Sompo GroupSompo America Insurance Company | 5 | 1 | 11 94 | Jun 18, 2026 |
| Tokio Marine Holdings Incorporated GroupSafety National Casualty Corporation | 5 | 1 | 11 94 | Feb 17, 2026 |
| ACP Insurance Mgmt LLC GroupAccelerant National Insurance Company | 3 | 2 | 11 94 | Dec 8, 2025 |
| Ascot Insurance US Group4 group companies filed it, led by Ascot Insurance Company and AmFed Advantage Insurance Company | 3 | 3 | 11 94 | Oct 13, 2023 |
| Starr Group2 group companies filed it, led by Starr Indemnity and Liability Company and Starr Specialty Insurance Company | 3 | 1 | 11 94 | Jun 25, 2025 |
How the largest insurers handle CG 30 57
Groups among the largest commercial general liability insurers that filed CG 30 57 or their own version in the past five years.
- Travelers GroupFiles its own version: CG D9 2602 22 Supplemental Extended Reporting Period Endorsement (3 states)
- WR Berkley Corporation GroupUses CG 30 57 in 1 filing
- Fairfax Financial GroupUses CG 30 57 in 1 filing
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States
Number of filings that include CG 30 57 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 27 05Exclusion of Specific Accidents, Products, Work or Locations (for Use with Products Claims-Made Policies)76 filings
- CG 28 34Supplemental Extended Reporting Period Endorsement (for Use with Products Claims- Made Policy)76 filings
- CG 28 35Supplemental Extended Reporting Period Endorsement for Specific Accidents, Products, Work or Locations (for Use with Products Claims-Made Policies)76 filings
- CG 28 03Supplemental Extended Reporting Period Endorsement (for Use with Liquor Claims-Made Policies)75 filings
- CG 27 02Exclusion of Specific Accidents, Products, Work or Locations (for Use with Cgl Claims- Made Policies)71 filings
- CG 28 33Voluntary Clean-Up Costs Reimbursement (for Use with Pollution Policy Cg 00 39)68 filings
- CG 22 57Exclusion - Underground Resources and Equipment67 filings
- CG 22 63Stevedoring Operations Limited Completed Operations Coverage (for Use with Cgl and Products Policies)67 filings
- CG 22 81Exclusion - Erroneous Delivery or Mixture and Resulting Failure of Seed to Germinate - Seed Merchants67 filings
- CG 28 02Insured Site Definition (Contractors) (for Use with Pollution Policies)67 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 | 11 94 | STNA-135128706 |
| Jun 26, 2026 | The Cincinnati Casualty Companyand 2 more | CO | 11 94 | CNNA-134975473 |
| Jun 18, 2026 | Sompo America Insurance Company | CO | 11 94 | SMPJ-134985965 |
| Jun 17, 2026 | Atlantic Specialty Insurance Company | NM | 11 94 | BEAC-134983795 |
| Jun 17, 2026 | Atlantic Specialty Insurance Company | SC | 11 94 | BEAC-134983796 |
| Jun 17, 2026 | State Automobile Mutual Insurance Company | CO | 11 94 | STAT-134984678 |
| Jun 15, 2026 | SiriusPoint America Insurance Company | CO | 11 94 | MRTN-134978899 |
| Jun 15, 2026 | SiriusPoint America Insurance Company | CO | 11 94 | MRTN-134978902 |
| Feb 17, 2026 | Safety National Casualty Corporation | CO | 11 94 | SFCC-134814522 |
| Feb 6, 2026 | Crum and Forster Indemnity Company | CA | 11 94 | CRUM-134831877 |
| Dec 9, 2025 | Universal North America Insurance Company | SC | 11 94 | UNAC-134760136 |
| Dec 8, 2025 | Accelerant National Insurance Company | CA | 11 94 | MRTN-134722366 |
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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