Coverage description
An Insurance Services Office (ISO) standard form. It adds the person or organization named in the schedule as an additional insured, but only for injury or damage caused in whole or in part by your acts or omissions, or those of people acting for you, in your ongoing operations or in connection with premises you own or rent.
How the form has changed
4 changes across 2 revisions, newest first. Each edition is compared with the one before it, using wording from filed copies.
12 19 edition
Dec 2019, compared with 04 13Latest editionWhen a contract requires the coverage, the additional insured's limit is the lesser of the contract amount or the applicable limits of insurance, no longer tied to the limits shown in the Declarations.
04 13
“Available under the applicable Limits of Insurance shown in the Declarations”
12 19
“Available under the applicable limits of insurance”
04 13 edition
Apr 2013, compared with 07 04Coverage for the additional insured applies only to the extent permitted by law.
07 04
Not in this edition
04 13
“only applies to the extent permitted by law”
When a contract requires the coverage, it is no broader than the contract requires.
07 04
Not in this edition
04 13
“will not be broader than that which you are required by the contract or agreement to provide”
When a contract requires the coverage, the most paid for the additional insured is the lesser of the contract amount or the available limits.
07 04
Not in this edition
04 13
“the most we will pay on behalf of the additional insured is the amount of insurance”
Editions
Edition dates as filed, newest first. Filing counts include every state submission that lists the edition.
| Edition | Filings | Companies | States | Filed |
|---|---|---|---|---|
| 12 19Dec 2019Latest | 358 | 114 | 48 | Nov 2021 to Oct 2026 |
| 04 13Apr 2013 | 93 | 33 | 45 | Dec 2021 to Jun 2026 |
| 07 04Jul 2004 | 62 | 15 | 46 | Jun 2022 to Mar 2026 |
| 11 85Nov 1985 | 55 | 10 | 45 | Jun 2022 to Mar 2026 |
2 other edition dates appear in one or two filings each, often carrier-specific versions: 05 20, 10/1/2020.
Where filings record what this form replaced, they name earlier edition 04 13 and other forms G 20 26. Only some filings record replacements.
What the filings show
- Edition in use: in the past 12 months, 43 companies filed the 12 19 edition and 7 companies filed 04 13.
- CG 20 10 (Additional Insured – Owners, Lessees or Contractors – Scheduled Person or Organization) is filed alongside it most often, in 346 of the same filings (84%).
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 20 26, out of 64 in total.
| Carrier | Filings | States | Editions, most filed first | Last filed |
|---|---|---|---|---|
| CNA Insurance Group6 group companies filed it, led by American Casualty Company of Reading, Pennsylvania and Continental Casualty Company | 50 | 44 | 11 8504 1307 04 | Mar 24, 2026 |
| OBS Holdings Group2 group companies filed it, led by Obsidian Insurance Company and Obsidian Pacific Insurance Company | 36 | 36 | 12 19 | Feb 3, 2023 |
| Clear Blue Financial GroupClear Blue Insurance Company | 35 | 34 | 12 19 | Feb 11, 2026 |
| Liberty Mutual Group11 group companies filed it, led by First National Insurance Company of America and General Insurance Company of America | 35 | 32 | 12 1907 04 | Oct 26, 2026 |
| United Fire & CAS Group7 group companies filed it, led by United Fire and Casualty Company and Addison Insurance Company | 29 | 28 | 12 19 | Dec 28, 2022 |
| Berkshire Hathaway Group6 group companies filed it, led by Berkshire Hathaway Homestate Insurance Company and Oak River Insurance Company | 18 | 16 | 04 13 | Nov 22, 2024 |
| Cincinnati Financial Group3 group companies filed it, led by The Cincinnati Casualty Company and The Cincinnati Indemnity Company | 16 | 16 | 12 19 | Oct 23, 2023 |
| WCF Mutual Insurance Company GroupAssociated Indemnity Corporation | 16 | 16 | 12 19 | Jan 15, 2026 |
| Nationwide Corporation Group8 group companies filed it, led by Nationwide Agribusiness Insurance Company and Nationwide Insurance Company of America | 15 | 5 | 04 1312 19 | Oct 21, 2026 |
| Markel Corporation Group2 group companies filed it, led by State National Insurance Company, Inc. and Markel Insurance Company | 10 | 4 | 12 1904 1307 04 | Oct 22, 2026 |
How the largest insurers handle CG 20 26
Groups among the largest commercial general liability insurers that filed CG 20 26 or their own version in the past five years.
- Berkshire Hathaway GroupUses CG 20 26 in 17 filings
- WR Berkley Corporation GroupUses CG 20 26 in 1 filing
- Fairfax Financial GroupUses CG 20 26 in 1 filing
See more forms
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States
Number of filings that include CG 20 26 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 20 10Additional Insured – Owners, Lessees or Contractors – Scheduled Person or Organization346 filings
- CG 20 28Additional Insured – Lessor of Leased Equipment318 filings
- CG 20 11Additional Insured – Managers or Lessors of Premises311 filings
- CG 20 18Additional Insured – Mortgagee, Assignee or Receiver286 filings
- CG 20 01Primary and Noncontributory – Other Insurance Condition256 filings
- CG 20 37Additional Insured – Owners, Lessees or Contractors – Completed Operations238 filings
- CG 20 15Additional Insured – Vendors231 filings
- CG 20 27Additional Insured – Co-Owner of Insured Premises224 filings
- CG 21 06Exclusion – Access or Disclosure of Confidential or Personal Information and Data-Related Liability – with Limited Bodily Injury Exception224 filings
- CG 00 01Commercial General Liability Coverage Form220 filings
Recent filings
Latest filings that include this form number. Filed copies open in FilingFocus.
| Submitted | Company | State | Editions | Tracking number |
|---|---|---|---|---|
| Oct 26, 2026 | American Economy Insurance Companyand 5 more | RI | 12 19 | LBRC-135130111 |
| Oct 22, 2026 | The Guarantee Company of North America USA | CA | 12 19 | SPRO-G134931114 |
| Oct 22, 2026 | State National Insurance Company, Inc. | CO | 12 19 | STNA-135128706 |
| Oct 21, 2026 | Allied Insurance Company of Americaand 4 more | CA | 12 19 | NWPP-G135131050 |
| Aug 20, 2026 | New York Marine and General Insurance Company | SC | 12 19 | PERR-135060921 |
| Aug 17, 2026 | Mississippi Farm Bureau Casualty Insurance Company | MS | 12 19 | SFBC-135017175 |
| Aug 10, 2026 | First National Insurance Company of America | NE | 12 19 | LBRC-135047012 |
| 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 |
| Jul 9, 2026 | First National Insurance Company of America | MS | 12 19 | LBRC-135012891 |
| 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 |
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 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
- CG 21 44 Limitation Of Coverage To Designated Premises, Project Or Operation
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