ISO endorsement · commercial general liability

CG 20 30 Oil Or Gas Operations - Nonoperating, Working Interests

Filings
139
latest Oct 22, 2026
Filing companies
77
40 carrier groups
States
31
Latest edition
12 19
Dec 2019

Coverage description

An Insurance Services Office (ISO) standard form. It adds as additional insureds the owners, co-owners, joint venturers, mining partners or LLCs with a nonoperating working interest in an oil or gas lease you operate, only for liability arising from that interest, with limits capped at what a contract requires.

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 cap on what is paid for an additional insured now refers to the applicable limits of insurance rather than the limits shown in the Declarations.

      04 13

      “Available under the applicable Limits of Insurance shown in the Declarations”

      12 19

      Removed

  2. 04 13 edition

    Apr 2013, compared with 01 96
    • Coverage for these additional insureds now applies only to the extent permitted by law.

      01 96

      Not in this edition

      04 13

      “The insurance afforded to such additional insured only applies to the extent permitted by law”

    • When a contract requires the coverage, it is no broader than the contract requires.

      01 96

      Not in this edition

      04 13

      “will not be broader than that which you are required by the contract or agreement to provide”

    • A new limits provision caps payment for an additional insured at the lesser of the contract requirement or the available limits.

      01 96

      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 2019Latest1166331Nov 2021 to Oct 2026
04 13Apr 201323207Dec 2021 to Oct 2026
01 96Jan 1996535Nov 2021 to Mar 2024

1 other edition date appears in one or two filings each, often carrier-specific versions: 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, 21 companies filed the 12 19 edition and 7 companies filed 04 13.
  • CG 20 27 (Additional Insured - Co-Owner of Insured Premises) is filed alongside it most often, in 139 of the same filings (100%).

Filed under

Commercial General Liability 112Other other liability 8Other Liability 7Other Commercial Lines 5Commercial Package 2Other 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 30, out of 40 in total.

CarrierFilingsStatesEditions, most filed firstLast filed
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
Markel Corporation Group2 group companies filed it, led by State National Insurance Company, Inc. and Markel Insurance Company9412 1904 1301 96Oct 22, 2026
Tokio Marine Holdings Incorporated Group4 group companies filed it, led by Safety National Casualty Corporation and TNUS Insurance Company8212 19Feb 17, 2026
Sompo GroupSompo America Insurance Company7212 19Jun 18, 2026
Grange Mutual CAS Group3 group companies filed it, led by Grange Indemnity Insurance Company and Grange Insurance Company6612 19Mar 28, 2024
Siriuspoint GroupSiriusPoint America Insurance Company6212 19Jun 15, 2026
Church Mutual GroupChurch Mutual Insurance Company, S.I.5212 19Jun 26, 2026
Hastings Mutual Insurance Company5412 19Mar 13, 2025

How the largest insurers handle CG 20 30

Groups among the largest commercial general liability insurers that filed CG 20 30 or their own version in the past five years.

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States

Number of filings that include CG 20 30 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: 2 filingsAR2Missouri: 0 filingsMOIndiana: 4 filingsIN4Louisiana: 0 filingsLAOhio: 3 filingsOH3Wisconsin: 2 filingsWI2Texas: 1 filingTX1Kentucky: 1 filingKY1Iowa: 2 filingsIA2Kansas: 2 filingsKS2Mississippi: 0 filingsMSNorth Carolina: 1 filingNC1Nebraska: 0 filingsNESouth Dakota: 0 filingsSDMontana: 1 filingMT1New Hampshire: 0 filingsNHVirginia: 2 filingsVA2Arizona: 0 filingsAZPennsylvania: 2 filingsPA2Rhode Island: 1 filingRI1Michigan: 0 filingsMIAlaska: 0 filingsAKDistrict of Columbia: 0 filingsDCIdaho: 1 filingID1Maryland: 1 filingMD1West Virginia: 0 filingsWVUtah: 0 filingsUTWyoming: 4 filingsWY4Delaware: 0 filingsDENew Mexico: 3 filingsNM3Colorado: 32 filingsCO32Connecticut: 1 filingCT1Maine: 0 filingsMENorth Dakota: 0 filingsNDIllinois: 10 filingsIL10Minnesota: 0 filingsMNNew Jersey: 1 filingNJ1New York: 0 filingsNYMassachusetts: 0 filingsMAWashington: 7 filingsWA7Oregon: 2 filingsOR2Vermont: 1 filingVT1California: 41 filingsCA41Nevada: 1 filingNV1Hawaii: 0 filingsHI
FewerMore filingsNone

Often filed with

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

  • CG 20 27Additional Insured - Co-Owner of Insured Premises139 filings
  • CG 20 07Additional Insured - Engineers, Architects or Surveyors138 filings
  • CG 20 12Additional Insured – State or Governmental Agency or Subdivision or Political Subdivision – Permits or Authorizations138 filings
  • CG 20 15Additional Insured – Vendors138 filings
  • CG 20 18Additional Insured – Mortgagee, Assignee or Receiver138 filings
  • CG 20 23Additional Insured - Executors, Administrators, Trustees or Beneficiaries138 filings
  • CG 20 24Additional Insured - Owners or Other Interests From Whom Land Has Been Leased138 filings
  • CG 21 66Exclusion – Volunteer Workers as Insureds138 filings
  • CG 20 05Additional Insured – Controlling Interest137 filings
  • CG 20 11Additional Insured – Managers or Lessors of Premises137 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
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
Mar 20, 2026American Casualty Company of Reading, Pennsylvaniaand 5 moreCO12 1904 13CNAB-134872676
Feb 24, 2026American Casualty Company of Reading, Pennsylvaniaand 5 moreSC12 1904 13CNAB-134851008
Feb 17, 2026Safety National Casualty CorporationCO12 19SFCC-134814522
Feb 6, 2026Crum and Forster Indemnity CompanyCA12 19CRUM-134831877

Most filed ISO CG forms

All Commercial General Liability (ISO CG) forms

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