ISO endorsement · commercial general liability

CG 20 33 Additional Insured – Owners, Lessees or Contractors – Automatic Status When Required in Construction Agreement With You

Filings
179
latest Oct 22, 2026
Filing companies
93
49 carrier groups
States
37
Latest edition
12 19
Dec 2019

Coverage description

An Insurance Services Office (ISO) standard form. It makes anyone you agree in a written contract to add as an additional insured, while you perform operations for them, an insured for injury or damage caused by your ongoing operations, with exclusions for professional services and completed work.

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
    • The additional insured's limit is now the lesser of the contract requirement or the applicable limits of insurance, no longer tied only to the limits shown in the Declarations.

      04 13

      “This endorsement shall not increase the applicable Limits of Insurance shown in the Declarations.”

      12 19

      “This endorsement shall not increase the applicable limits of insurance.”

  2. 04 13 edition

    Apr 2013, compared with 07 04
    • Coverage for the additional insured now applies only to the extent permitted by law and 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 for such additional insured.”

    • The professional services exclusion now also applies to claims alleging negligent supervision, hiring, employment, training or monitoring.

      07 04

      Not in this edition

      04 13

      “This exclusion applies even if the claims against any insured allege negligence or other wrongdoing in the supervision, hiring, employment, training or monitoring”

    • A new limits provision caps what is paid for the additional insured at the lesser of the amount the contract requires 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 2019Latest1377936Nov 2021 to Oct 2026
04 13Apr 2013422216Dec 2021 to Oct 2026
07 04Jul 200412412Oct 2022 to Mar 2024
10 01Oct 200115213Feb 2023 to Oct 2023

3 other edition dates appear in one or two filings each, often carrier-specific versions: 05 20, 03 97, 10/1/2020.

Where filings record what this form replaced, they name earlier edition 04 13. Only some filings record replacements.

What the filings show

  • Edition in use: in the past 12 months, 26 companies filed the 12 19 edition and 8 companies filed 04 13.
  • CG 20 01 (Primary and Noncontributory - Other Insurance Condition) is filed alongside it most often, in 158 of the same filings (88%).

Filed under

Commercial General Liability 137Other Liability 15Other other liability 8Commercial Package 7Other Commercial Lines 7Other CMP 2

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 33, out of 49 in total.

CarrierFilingsStatesEditions, most filed firstLast filed
Markel Corporation Group3 group companies filed it, led by State National Insurance Company, Inc. and Markel Insurance Company271504 1310 0107 04Oct 22, 2026
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 Allied Insurance Company of America and Nationwide Agribusiness Insurance Company10304 1312 19Feb 12, 2025
Tokio Marine Holdings Incorporated Group5 group companies filed it, led by Safety National Casualty Corporation and TNUS Insurance Company9212 19Feb 17, 2026
Sompo GroupSompo America Insurance Company7212 19Jun 18, 2026
Starr Group2 group companies filed it, led by Starr Indemnity and Liability Company and Starr Specialty Insurance Company7212 1904 1310/1/2020Apr 13, 2026
Grange Mutual CAS Group3 group companies filed it, led by Grange Indemnity Insurance Company and Grange Insurance Company6612 19Mar 28, 2024
Hastings Mutual Insurance Company6512 19Mar 13, 2025
Siriuspoint GroupSiriusPoint America Insurance Company6212 19Jun 15, 2026

How the largest insurers handle CG 20 33

Groups among the largest commercial general liability insurers that filed CG 20 33 or their own version in the past five years.

See more forms

Search related forms, compare editions, and research carrier filings with FilingFocus.

States

Number of filings that include CG 20 33 in each state, Oct 2021 to Oct 2026. Darker states have more filings.

Tennessee: 1 filingTN1Alabama: 1 filingAL1Florida: 0 filingsFLGeorgia: 3 filingsGA3Oklahoma: 1 filingOK1South Carolina: 4 filingsSC4Arkansas: 3 filingsAR3Missouri: 2 filingsMO2Indiana: 5 filingsIN5Louisiana: 1 filingLA1Ohio: 3 filingsOH3Wisconsin: 4 filingsWI4Texas: 3 filingsTX3Kentucky: 1 filingKY1Iowa: 3 filingsIA3Kansas: 2 filingsKS2Mississippi: 1 filingMS1North Carolina: 1 filingNC1Nebraska: 0 filingsNESouth Dakota: 0 filingsSDMontana: 4 filingsMT4New Hampshire: 0 filingsNHVirginia: 2 filingsVA2Arizona: 0 filingsAZPennsylvania: 2 filingsPA2Rhode Island: 1 filingRI1Michigan: 0 filingsMIAlaska: 0 filingsAKDistrict of Columbia: 0 filingsDCIdaho: 2 filingsID2Maryland: 1 filingMD1West Virginia: 0 filingsWVUtah: 2 filingsUT2Wyoming: 5 filingsWY5Delaware: 0 filingsDENew Mexico: 4 filingsNM4Colorado: 37 filingsCO37Connecticut: 1 filingCT1Maine: 0 filingsMENorth Dakota: 0 filingsNDIllinois: 9 filingsIL9Minnesota: 0 filingsMNNew Jersey: 1 filingNJ1New York: 1 filingNY1Massachusetts: 0 filingsMAWashington: 10 filingsWA10Oregon: 3 filingsOR3Vermont: 1 filingVT1California: 51 filingsCA51Nevada: 2 filingsNV2Hawaii: 1 filingHI1
FewerMore filingsNone

Often filed with

Standard-style form numbers that appear in the same filings most often.

  • CG 20 01Primary and Noncontributory - Other Insurance Condition158 filings
  • CG 20 10Additional Insured - Owners, Lessees or Contractors - Scheduled Person or Organization155 filings
  • CG 20 28Additional Insured – Lessor of Leased Equipment153 filings
  • CG 20 38Additional Insured - Owners, Lessees or Contractors - Automatic Status for Other Parties When Required in Written Construction Agreement153 filings
  • CG 20 15Additional Insured – Vendors152 filings
  • CG 20 26Additional Insured – Designated Person or Organization151 filings
  • CG 20 11Additional Insured – Managers or Lessors of Premises150 filings
  • CG 20 12Additional Insured - State or Governmental Agency or Subdivision or Political Subdivision - Permits or Authorizations150 filings
  • CG 20 34Additional Insured - Lessor of Leased Equipment - Automatic Status When Required in Lease Agreement with You150 filings
  • CG 20 18Additional Insured – Mortgagee, Assignee or Receiver149 filings

Recent filings

Latest filings that include this form number. Filed copies open in FilingFocus.

SubmittedCompanyStateEditionsTracking number
Oct 22, 2026State National Insurance Company, Inc.CO12 19STNA-135128706
Oct 6, 2026American Casualty Company of Reading, Pennsylvaniaand 5 moreCA12 1904 13CNAB-135091690
Aug 17, 2026Mississippi Farm Bureau Casualty Insurance CompanyMS12 19SFBC-135017175
Jul 10, 2026Southern Farm Bureau Casualty Insurance CompanyLA12 19SFBC-135013358
Jul 2, 2026State National Insurance Company, Inc.CO04 13STNA-135002472
Jun 26, 2026Church Mutual Insurance Company, S.I.CO12 19CHMU-134947220
Jun 24, 2026Southern Trust Insurance CompanyGA12 19STTR-134864949
Jun 18, 2026Sompo America Insurance CompanyCO12 19SMPJ-134985965
Jun 17, 2026Atlantic Specialty Insurance CompanyNM12 1904 13BEAC-134983795
Jun 15, 2026SiriusPoint America Insurance CompanyCO12 19MRTN-134978899
Jun 15, 2026SiriusPoint America Insurance CompanyCO12 19MRTN-134978902
Jun 2, 2026Zenith Insurance CompanyCA12 19ZICO-134965759

Most filed ISO CG forms

All Commercial General Liability (ISO CG) forms

See more carrier forms

Search forms by carrier, line of business, state, and wording with FilingFocus.