ISO endorsement · commercial general liability

CG 20 31 Additional Insured - Engineers, Architects Or Surveyors

Filings
115
latest Oct 22, 2026
Filing companies
74
40 carrier groups
States
29
Latest edition
12 19
Dec 2019

Coverage description

An Insurance Services Office (ISO) standard form. It adds architects, engineers and surveyors you engage as additional insureds for injury or damage caused by your acts at your premises or in your ongoing operations, excluding their professional services and capping their coverage at what the 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 the additional insured's limits now refers to the applicable limits of insurance rather than only 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; whichever is less”

  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”

    • When a contract requires the coverage, the most paid for the additional insured is the lesser of the contract requirement 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”

    • The professional services exclusion now also applies when claims allege negligent supervision, hiring, training or monitoring of others.

      07 04

      Not in this edition

      04 13

      “allege negligence or other wrongdoing in the supervision, hiring, employment, training or monitoring of others”

Editions

Edition dates as filed, newest first. Filing counts include every state submission that lists the edition.

EditionFilingsCompaniesStatesFiled
12 19Dec 2019Latest946028Nov 2021 to Oct 2026
04 13Apr 201319187Dec 2021 to Oct 2026
07 04Jul 2004535Feb 2023 to Mar 2024

1 other edition date appears in one or two filings each, often carrier-specific versions: 01 96.

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 07 (Additional Insured - Engineers, Architects or Surveyors) is filed alongside it most often, in 113 of the same filings (98%).

Filed under

Commercial General Liability 91Other Liability 7Other Commercial Lines 6Other other liability 4Other CMP 2Commercial Interline Filings 1

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 31, 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
Markel Corporation Group2 group companies filed it, led by State National Insurance Company, Inc. and Markel Insurance Company9412 1904 1307 04Oct 22, 2026
Nationwide Corporation Group7 group companies filed it, led by Allied Insurance Company of America and Nationwide Insurance Company of America8304 1312 19Feb 12, 2025
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
Hastings Mutual Insurance Company6512 19Mar 13, 2025
Siriuspoint GroupSiriusPoint America Insurance Company6212 19Jun 15, 2026
Axis Capital GroupAXIS Insurance Company4104 13Apr 11, 2025
CNA Insurance Group6 group companies filed it, led by American Casualty Company of Reading, Pennsylvania and Continental Casualty Company3304 1312 19Oct 6, 2026

How the largest insurers handle CG 20 31

Groups among the largest commercial general liability insurers that filed CG 20 31 or their own version in the past five years.

See more forms

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States

Number of filings that include CG 20 31 in each state, Oct 2021 to Oct 2026. Darker states have more filings.

Tennessee: 1 filingTN1Alabama: 1 filingAL1Florida: 0 filingsFLGeorgia: 3 filingsGA3Oklahoma: 0 filingsOKSouth Carolina: 4 filingsSC4Arkansas: 1 filingAR1Missouri: 1 filingMO1Indiana: 3 filingsIN3Louisiana: 0 filingsLAOhio: 3 filingsOH3Wisconsin: 2 filingsWI2Texas: 1 filingTX1Kentucky: 0 filingsKYIowa: 1 filingIA1Kansas: 1 filingKS1Mississippi: 0 filingsMSNorth Carolina: 1 filingNC1Nebraska: 0 filingsNESouth Dakota: 0 filingsSDMontana: 0 filingsMTNew Hampshire: 0 filingsNHVirginia: 1 filingVA1Arizona: 0 filingsAZPennsylvania: 1 filingPA1Rhode Island: 1 filingRI1Michigan: 0 filingsMIAlaska: 0 filingsAKDistrict of Columbia: 0 filingsDCIdaho: 0 filingsIDMaryland: 1 filingMD1West Virginia: 0 filingsWVUtah: 1 filingUT1Wyoming: 3 filingsWY3Delaware: 0 filingsDENew Mexico: 2 filingsNM2Colorado: 26 filingsCO26Connecticut: 1 filingCT1Maine: 0 filingsMENorth Dakota: 0 filingsNDIllinois: 9 filingsIL9Minnesota: 0 filingsMNNew Jersey: 1 filingNJ1New York: 0 filingsNYMassachusetts: 0 filingsMAWashington: 6 filingsWA6Oregon: 2 filingsOR2Vermont: 1 filingVT1California: 35 filingsCA35Nevada: 1 filingNV1Hawaii: 0 filingsHI
FewerMore filingsNone

Often filed with

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

  • CG 20 07Additional Insured - Engineers, Architects or Surveyors113 filings
  • CG 20 23Additional Insured - Executors, Administrators, Trustees or Beneficiaries113 filings
  • CG 20 27Additional Insured - Co-Owner of Insured Premises113 filings
  • CG 20 05Additional Insured - Controlling Interest112 filings
  • CG 20 12Additional Insured - State or Governmental Agency or Subdivision or Political Subdivision - Permits or Authorizations112 filings
  • CG 20 13Additional Insured - State or Governmental Agency or Subdivision or Political Subdivision - Permits or Authorizations Relating to Premises112 filings
  • CG 20 15Additional Insured - Vendors112 filings
  • CG 20 18Additional Insured - Mortgagee, Assignee or Receiver112 filings
  • CG 20 24Additional Insured - Owners or Other Interests From Whom Land Has Been Leased112 filings
  • CG 20 32Additional Insured - Engineers, Architects or Surveyors Not Engaged by the Named Insured112 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 24, 2026Southern Trust Insurance CompanyGA12 19STTR-134864949
Jun 23, 2026Addison Insurance Companyand 1 moreCO12 19UNFG-134979892
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

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