| Safeco |
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| Nationwide |
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| State Auto Insurance |
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| The Progressive Corporation (Principal Office Location: Mayfield Village, Ohio) |
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| Travelers |
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| The Hartford Financial Services Group, Inc. (Principal Office Location: Hartford, Connecticut) |
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| Foremost Insurance Group (Principal Office Location: Caledonia, Michigan) |
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| MEM (Missouri Employers Mutual) |
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| Markel Insurance |
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| Old Republic Surety Company |
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