ISO endorsement ยท commercial general liability

CG 28 01 Extended Reporting Period Endorsement

Filings
86
latest Oct 22, 2026
Filing companies
59
30 carrier groups
States
11
Latest edition
01 96
Jan 1996

Coverage description

An Insurance Services Office (ISO) standard form. It adds a one-year extended reporting period to the pollution liability coverage part, treating claims first made within a year after the policy ends as made on its last day, for injury or damage before the policy ended and after any retroactive date.

Editions

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

EditionFilingsCompaniesStatesFiled
01 96Jan 1996Latest865911Nov 2021 to Oct 2026

What the filings show

  • Edition in use: in the past 12 months, 24 companies filed the 01 96 edition.
  • CG 27 02 (Exclusion of Specific Accidents, Products, Work or Locations (for Use with Cgl Claims- Made Policies)) is filed alongside it most often, in 84 of the same filings (98%).

Filed under

Commercial General Liability 59Other Liability 18Other other liability 5Commercial Package 3CMP 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Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Oct 2026, excluding withdrawn and rejected filings.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 28 01, out of 30 in total.

CarrierFilingsStatesEditions, most filed firstLast filed
Markel Corporation GroupState National Insurance Company, Inc.10301 96Oct 22, 2026
WR Berkley Corporation Group14 group companies filed it, led by Acadia Insurance Company and Continental Western Insurance Company10201 96Jun 19, 2026
Siriuspoint GroupSiriusPoint America Insurance Company8301 96Jun 15, 2026
Nationwide Corporation Group7 group companies filed it, led by Allied Insurance Company of America and Nationwide Agribusiness Insurance Company6301 96Feb 12, 2025
OLD Republic Group2 group companies filed it, led by BITCO General Insurance Corporation and BITCO National Insurance Company5101 96May 11, 2026
Sompo GroupSompo America Insurance Company5101 96Jun 18, 2026
Tokio Marine Holdings Incorporated GroupSafety National Casualty Corporation5101 96Feb 17, 2026
ACP Insurance Mgmt LLC GroupAccelerant National Insurance Company3201 96Dec 8, 2025
Ascot Insurance US Group4 group companies filed it, led by Ascot Insurance Company and AmFed Advantage Insurance Company3301 96Oct 13, 2023
Cincinnati Financial Group3 group companies filed it, led by The Cincinnati Casualty Company and The Cincinnati Indemnity Company3301 96Jan 4, 2024

How the largest insurers handle CG 28 01

Groups among the largest commercial general liability insurers that filed CG 28 01 or their own version in the past five years.

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States

Number of filings that include CG 28 01 in each state, Oct 2021 to Oct 2026. Darker states have more filings.

Tennessee: 0 filingsTNAlabama: 0 filingsALFlorida: 0 filingsFLGeorgia: 0 filingsGAOklahoma: 0 filingsOKSouth Carolina: 18 filingsSC18Arkansas: 0 filingsARMissouri: 0 filingsMOIndiana: 0 filingsINLouisiana: 0 filingsLAOhio: 0 filingsOHWisconsin: 0 filingsWITexas: 0 filingsTXKentucky: 0 filingsKYIowa: 0 filingsIAKansas: 0 filingsKSMississippi: 1 filingMS1North Carolina: 0 filingsNCNebraska: 0 filingsNESouth Dakota: 0 filingsSDMontana: 0 filingsMTNew Hampshire: 0 filingsNHVirginia: 0 filingsVAArizona: 0 filingsAZPennsylvania: 0 filingsPARhode Island: 1 filingRI1Michigan: 0 filingsMIAlaska: 0 filingsAKDistrict of Columbia: 0 filingsDCIdaho: 0 filingsIDMaryland: 0 filingsMDWest Virginia: 0 filingsWVUtah: 0 filingsUTWyoming: 2 filingsWY2Delaware: 0 filingsDENew Mexico: 1 filingNM1Colorado: 41 filingsCO41Connecticut: 0 filingsCTMaine: 0 filingsMENorth Dakota: 0 filingsNDIllinois: 1 filingIL1Minnesota: 0 filingsMNNew Jersey: 0 filingsNJNew York: 0 filingsNYMassachusetts: 0 filingsMAWashington: 5 filingsWA5Oregon: 1 filingOR1Vermont: 0 filingsVTCalifornia: 14 filingsCA14Nevada: 1 filingNV1Hawaii: 0 filingsHI
FewerMore filingsNone

Often filed with

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

  • CG 27 02Exclusion of Specific Accidents, Products, Work or Locations (for Use with Cgl Claims- Made Policies)84 filings
  • CG 27 05Exclusion of Specific Accidents, Products, Work or Locations (for Use with Products Claims-Made Policies)84 filings
  • CG 28 34Supplemental Extended Reporting Period Endorsement (for Use with Products Claims- Made Policy)84 filings
  • CG 28 35Supplemental Extended Reporting Period Endorsement for Specific Accidents, Products, Work or Locations (for Use with Products Claims-Made Policies)84 filings
  • CG 28 33Voluntary Clean-Up Costs Reimbursement (for Use with Pollution Policy Cg 00 39)81 filings
  • CG 28 02Insured Site Definition (Contractors) (for Use with Pollution Policies)80 filings
  • CG 28 03Supplemental Extended Reporting Period Endorsement (for Use with Liquor Claims-Made Policies)78 filings
  • CG 00 39Pollution Liability Coverage Form Designated Sites73 filings
  • CG 00 40Pollution Liability Limited Coverage Form Designated Sites73 filings
  • CG 00 02Commercial General Liability Coverage Form72 filings

Recent filings

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

SubmittedCompanyStateEditionsTracking number
Oct 22, 2026State National Insurance Company, Inc.CO01 96STNA-135128706
Jul 2, 2026State National Insurance Company, Inc.CO01 96STNA-135002472
Jun 19, 2026Acadia Insurance Companyand 4 moreCO01 96BNIC-134992811
Jun 19, 2026Berkley Casualty Companyand 8 moreCO01 96BNIC-134992815
Jun 18, 2026Sompo America Insurance CompanyCO01 96SMPJ-134985965
Jun 17, 2026Atlantic Specialty Insurance CompanyNM01 96BEAC-134983795
Jun 17, 2026Atlantic Specialty Insurance CompanySC01 96BEAC-134983796
Jun 15, 2026SiriusPoint America Insurance CompanyCO01 96MRTN-134978899
Jun 15, 2026SiriusPoint America Insurance CompanyCO01 96MRTN-134978902
May 11, 2026BITCO General Insurance Corporationand 1 moreCO01 96LDDX-134937506
Feb 17, 2026Safety National Casualty CorporationCO01 96SFCC-134814522
Feb 6, 2026Crum and Forster Indemnity CompanyCA01 96CRUM-134831877

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