E
Keystone Mutual Ins Co
Rating Date
June 2026
NAIC
Classification
Risk Adjusted
Capital Ratio #1
Risk Adjusted
Capital Ratio #2
Loss
Ratio
Total
Assets
Capital
Net
Premiums
Net
Income
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Major Rating Factors: Poor long-term capitalization index (0.1 on a scale of 0 to 10) based on weak current risk adjusted capital (severe and moderate loss scenarios). A history of deficient reserves (0.4) that places pressure on both capital and profits. In the last five years, reserves (two year development) fluctuated between 103.1% and 423.2% deficient. Weak profitability index (1.3) with operating losses during 2021, 2022, 2023 and 2025.
Other Rating Factors: Weak overall results on stability tests (0.0) including weak risk adjusted capital in prior years, weak results on operational trends and weak risk diversification. The largest net exposure for one risk is excessive at 78.9% of capital. Good liquidity (6.0) with sufficient resources (cash flows and marketable investments) to handle a spike in claims.
Stability Factors: C - Past results on our Risk-Adjusted Capital tests. D - Limited diversification of general business, policy, and/or investment risk. R - Concerns about the financial strength of its reinsurers. T - Significant trends in critical asset, liability, income or expense items.
Principal Lines of Business: Med mal (100.0%)
Licensed in: MO
Principal Investments: Common stock (20.4%), investment grade bonds (6.6%), cash (1.9%), other (71.1%)
Ratios
Premium to Surplus
Reserve to Surplus
1-Year Reserve Development
2-Year Reserve Development
Expense Ratio
Combined Ratio
Cash From Underwriting
Net Premium Growth
Investments in Affiliates
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Corporate Info
Group Affiliation
None
Investment Rating
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Company Address
13537 Barrett Parkway Drive, Suite 345
Saint Louis, MO 63021
Phone Number
(636) 549-3744
NAIC Number
13073
Largest Affiliates
There are no affiliate to display.