ISO endorsement · commercial general liability

CG 20 26 Additional Insured - Designated Person or Organization Endorsement

Filings
412
latest Oct 26, 2026
Filing companies
133
64 carrier groups
States
48
including DC
Latest edition
12 19
Dec 2019

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.

  1. 12 19 edition

    Dec 2019, compared with 04 13Latest edition
    • When 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”

  2. 04 13 edition

    Apr 2013, compared with 07 04
    • Coverage 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.

EditionFilingsCompaniesStatesFiled
12 19Dec 2019Latest35811448Nov 2021 to Oct 2026
04 13Apr 2013933345Dec 2021 to Jun 2026
07 04Jul 2004621546Jun 2022 to Mar 2026
11 85Nov 1985551045Jun 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

Commercial General Liability 320Other Liability 37Commercial Package 28Other other liability 8Other Commercial Lines 7Other CMP 4

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.

CarrierFilingsStatesEditions, most filed firstLast filed
CNA Insurance Group6 group companies filed it, led by American Casualty Company of Reading, Pennsylvania and Continental Casualty Company504411 8504 1307 04Mar 24, 2026
OBS Holdings Group2 group companies filed it, led by Obsidian Insurance Company and Obsidian Pacific Insurance Company363612 19Feb 3, 2023
Clear Blue Financial GroupClear Blue Insurance Company353412 19Feb 11, 2026
Liberty Mutual Group11 group companies filed it, led by First National Insurance Company of America and General Insurance Company of America353212 1907 04Oct 26, 2026
United Fire & CAS Group7 group companies filed it, led by United Fire and Casualty Company and Addison Insurance Company292812 19Dec 28, 2022
Berkshire Hathaway Group6 group companies filed it, led by Berkshire Hathaway Homestate Insurance Company and Oak River Insurance Company181604 13Nov 22, 2024
Cincinnati Financial Group3 group companies filed it, led by The Cincinnati Casualty Company and The Cincinnati Indemnity Company161612 19Oct 23, 2023
WCF Mutual Insurance Company GroupAssociated Indemnity Corporation161612 19Jan 15, 2026
Nationwide Corporation Group8 group companies filed it, led by Nationwide Agribusiness Insurance Company and Nationwide Insurance Company of America15504 1312 19Oct 21, 2026
Markel Corporation Group2 group companies filed it, led by State National Insurance Company, Inc. and Markel Insurance Company10412 1904 1307 04Oct 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.

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.

Tennessee: 6 filingsTN6Alabama: 5 filingsAL5Florida: 0 filingsFLGeorgia: 7 filingsGA7Oklahoma: 6 filingsOK6South Carolina: 11 filingsSC11Arkansas: 7 filingsAR7Missouri: 8 filingsMO8Indiana: 10 filingsIN10Louisiana: 5 filingsLA5Ohio: 13 filingsOH13Wisconsin: 11 filingsWI11Texas: 7 filingsTX7Kentucky: 8 filingsKY8Iowa: 7 filingsIA7Kansas: 7 filingsKS7Mississippi: 7 filingsMS7North Carolina: 5 filingsNC5Nebraska: 5 filingsNE5South Dakota: 5 filingsSD5Montana: 7 filingsMT7New Hampshire: 2 filingsNH2Virginia: 7 filingsVA7Arizona: 0 filingsAZPennsylvania: 5 filingsPA5Rhode Island: 5 filingsRI5Michigan: 0 filingsMIAlaska: 1 filingAK1District of Columbia: 3 filingsDC3Idaho: 7 filingsID7Maryland: 5 filingsMD5West Virginia: 4 filingsWV4Utah: 7 filingsUT7Wyoming: 11 filingsWY11Delaware: 3 filingsDE3New Mexico: 10 filingsNM10Colorado: 37 filingsCO37Connecticut: 5 filingsCT5Maine: 4 filingsME4North Dakota: 6 filingsND6Illinois: 21 filingsIL21Minnesota: 1 filingMN1New Jersey: 7 filingsNJ7New York: 5 filingsNY5Massachusetts: 4 filingsMA4Washington: 16 filingsWA16Oregon: 6 filingsOR6Vermont: 4 filingsVT4California: 72 filingsCA72Nevada: 6 filingsNV6Hawaii: 1 filingHI1
FewerMore filingsNone

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.

SubmittedCompanyStateEditionsTracking number
Oct 26, 2026American Economy Insurance Companyand 5 moreRI12 19LBRC-135130111
Oct 22, 2026The Guarantee Company of North America USACA12 19SPRO-G134931114
Oct 22, 2026State National Insurance Company, Inc.CO12 19STNA-135128706
Oct 21, 2026Allied Insurance Company of Americaand 4 moreCA12 19NWPP-G135131050
Aug 20, 2026New York Marine and General Insurance CompanySC12 19PERR-135060921
Aug 17, 2026Mississippi Farm Bureau Casualty Insurance CompanyMS12 19SFBC-135017175
Aug 10, 2026First National Insurance Company of AmericaNE12 19LBRC-135047012
Jul 10, 2026Southern Farm Bureau Casualty Insurance CompanyLA12 19SFBC-135013358
Jul 10, 2026Trisura Insurance CompanyWA12 19SHNF-134976660
Jul 9, 2026First National Insurance Company of AmericaMS12 19LBRC-135012891
Jun 30, 2026Trisura Insurance CompanyIL12 19SHNF-134983369
Jun 26, 2026Church Mutual Insurance Company, S.I.CO12 19CHMU-134947220

Most filed ISO CG forms

All Commercial General Liability (ISO CG) forms

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