Coverage description
An Insurance Services Office (ISO) standard form. It covers sums you legally must pay for loss to trailers you don't own and their equipment, under the comprehensive, specified causes of loss, collision, fire or fire and theft coverages shown in the schedule, and adds defense and supplementary payments.
How the form has changed
2 changes across 1 revision, newest first. Each edition is compared with the one before it, using wording from filed copies.
09 27 edition
Sep 2027, compared with 10 13Latest editionMechanical or electrical malfunction and failure of the trailer's computer system, including failure caused by a cyber incident, are now excluded.
10 13
“Wear and tear, freezing, mechanical or electrical breakdown.”
09 27
“Failure, malfunction or inadequacy of the covered "trailer's" "computer system"”
Loss to personal or confidential information stored or used by the trailer's computer system is now excluded, unless the manufacturer deems it necessary for the trailer's operation.
10 13
Not in this edition
09 27
“We will not pay for "loss" to "personal or confidential information or material"”
Editions
Edition dates as filed, newest first. Filing counts include every state submission that lists the edition.
| Edition | Filings | Companies | States | Filed |
|---|---|---|---|---|
| 09 27Sep 2027Latest | 27 | 1 | 27 | Aug 2026 to Sep 2026 |
| 11 20Nov 2020 | 3 | 2 | 1 | Jul 2022 to Jun 2024 |
| 10 13Oct 2013 | 219 | 131 | 26 | Dec 2021 to Sep 2026 |
| 03 10Mar 2010 | 9 | 6 | 5 | Jun 2022 to Mar 2026 |
1 other edition date appears in one or two filings each, often carrier-specific versions: 12 18.
What the filings show
- Edition in use: in the past 12 months, 58 companies filed the 10 13 edition and 2 companies filed 03 10.
- The latest edition, 09 27, has been filed by Insurance Services Office, Inc in 27 states since Aug 20, 2026. No carrier filings list it yet.
- CA 99 23 (Rental Reimbursement Coverage) is filed alongside it most often, in 225 of the same filings (87%).
Filed under
Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Sep 2026, excluding withdrawn and rejected filings.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 CA 23 98, out of 62 in total.
| Carrier | Filings | States | Editions, most filed first | Last filed |
|---|---|---|---|---|
| Insurance Services Office, Inc.Advisory Organization | 28 | 28 | 09 2710 13 | Sep 17, 2026 |
| Nationwide Corporation Group11 group companies filed it, led by Allied Insurance Company of America and Nationwide Mutual Insurance Company | 16 | 7 | 10 13 | Apr 7, 2026 |
| Arch Insurance Group3 group companies filed it, led by Arch Indemnity Insurance Company and Arch Insurance Company | 14 | 2 | 10 13 | Apr 8, 2026 |
| OLD Republic Group4 group companies filed it, led by BITCO General Insurance Corporation and BITCO National Insurance Company | 13 | 1 | 10 1311 20 | May 11, 2026 |
| Berkshire Hathaway Group11 group companies filed it, led by Berkshire Hathaway Direct Insurance Company and Berkshire Hathaway Homestate Insurance Company | 11 | 8 | 10 13 | Jun 24, 2026 |
| Liberty Mutual GroupState Automobile Mutual Insurance Company | 10 | 1 | 10 13 | Jun 17, 2026 |
| Scor GroupGeneral Security National Insurance Company | 10 | 1 | 10 13 | Jun 9, 2026 |
| Grange Mutual CAS Group6 group companies filed it, led by Grange Indemnity Insurance Company and Grange Insurance Company | 9 | 9 | 10 13 | Apr 2, 2024 |
| MS & AD Insurance Group3 group companies filed it, led by Mitsui Sumitomo Insurance Company of America and Mitsui Sumitomo Insurance USA Inc. | 8 | 5 | 10 13 | Sep 4, 2025 |
| Markel Corporation Group3 group companies filed it, led by State National Insurance Company, Inc. and Markel Insurance Company | 8 | 4 | 10 13 | Jun 24, 2024 |
How the largest insurers handle CA 23 98
Groups among the largest commercial auto insurers that filed CA 23 98 or their own version in the past five years.
- Travelers GroupUses CA 23 98 in 65 filings
- Berkshire Hathaway GroupUses CA 23 98 in 8 filings
See more forms
Search related forms, compare editions, and research carrier filings with FilingFocus.
States
Number of filings that include CA 23 98 in each state, Oct 2021 to Sep 2026. Darker states have more filings.
Often filed with
Standard-style form numbers that appear in the same filings most often.
- CA 99 23Rental Reimbursement Coverage225 filings
- CA 99 30Tapes, Records and Discs Coverage213 filings
- CA 99 48Pollution Liability - Broadened Coverage for Covered Autos - Business Auto and Motor Carrier Coverage Forms213 filings
- CA 99 37Garagekeepers Coverage210 filings
- CA 99 10Drive Other Car Coverage - Broadened Coverage for Named Individuals206 filings
- CA 00 01Business Auto Coverage Form203 filings
- CA 99 33Employees as Insureds203 filings
- CA 20 48Designated Insured for Covered Autos Liability Coverage202 filings
- CA 99 44Loss Payable Clause202 filings
- CA 04 44Waiver of Transfer of Rights of Recovery Against Others to Us (Waiver of Subrogation)200 filings
Recent filings
Latest filings that include this form number. Filed copies open in FilingFocus.
| Submitted | Company | State | Editions | Tracking number |
|---|---|---|---|---|
| Sep 17, 2026 | Insurance Services Office, Inc. | CA | 09 27 | ISOF-135093307 |
| Sep 4, 2026 | Incline Casualty Company | SC | 10 13 | AIAD-135047572 |
| Aug 28, 2026 | Jet Insurance Company | SC | 10 13 | MRTN-134878222 |
| Aug 26, 2026 | Insurance Services Office, Inc. | LA | 09 27 | ISOF-135053020 |
| Aug 26, 2026 | Insurance Services Office, Inc. | TX | 09 27 | ISOF-135053045 |
| Aug 25, 2026 | Insurance Services Office, Inc. | OK | 09 27 | ISOF-135053037 |
| Aug 21, 2026 | Insurance Services Office, Inc. | AR | 09 27 | ISOF-135052987 |
| Aug 21, 2026 | Insurance Services Office, Inc. | MS | 09 27 | ISOF-135053025 |
| Aug 21, 2026 | Insurance Services Office, Inc. | NJ | 09 27 | ISOF-135053031 |
| Aug 21, 2026 | Insurance Services Office, Inc. | ND | 09 27 | ISOF-135053035 |
| Aug 21, 2026 | Insurance Services Office, Inc. | VT | 09 27 | ISOF-135053047 |
| Aug 20, 2026 | Insurance Services Office, Inc. | AZ | 09 27 | ISOF-135052986 |
Most filed ISO CA forms
- CA DS 03 Business Auto Declarations
- CA DS 21 Motor Carrier Declarations
- CA 00 01 Business Auto Coverage Form
- CA 28 03 Abuse Or Molestation Exclusion For Covered Autos Liability Exposure
- CA 23 17 Truckers - Uniform Intermodal Interchange Endorsement Form UIIE - 1
- CA 04 43 Waiver Of Transfer Of Rights Of Recovery Against Others To Us (Waiver Of Subrogation) - Automatic When Required By Written Contract Or Agreement
- CA 04 44 Waiver Of Transfer Of Rights Of Recovery Against Others To Us (Waiver Of Subrogation)
- CA 04 49 Primary and Noncontributory - Other Insurance Condition
- CA 20 01 Lessor - Additional Insured And Loss Payee
- CA 20 48 Designated Insured For Covered Autos Liability Coverage
- CA 00 20 Motor Carrier Coverage Form
- CA 20 71 Auto Loan/Lease Gap Coverage
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