Aaron Diefenthaler
Net worth: 5 M $ as of 2026-08-30
Net worth: 5 M $ as of 2026-08-30
Mr. Aaron P. Diefenthaler, CFA MBA, is a Treasurer, Chief Investment Officer & Vice President at RLI Corp., a Vice President, Chief Investment Officer & Treasurer at RLI Insurance Co., a Chief Investment Officer & Vice President at Clear Blue Insurance Co., a Chief Investment Officer & Vice President at Contractors Bonding & Insurance Co., a Chief Investment Officer & Vice President at Mt. Hawley Insurance Co. and a Chief Investment Officer & Vice President at RLI Insurance Co. He is responsible for leading RLI’s investment and asset allocation strategy, capital management, investor relations and corporate development functions, as well as RLI’s Mortgage Reinsurance product. He joined RLI in 2012 with 16 years of investment and operations experience. Prior to joining RLI, he served as principal and portfolio manager for AAM Insurance Investment Management where he managed investment portfolios for numerous insurance companies. He has a bachelor’s degree in finance from Indiana University and a MBA from DePaul University’s Kellstadt Graduate School of Business and holds the CFA designation.
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
RLI CORP. 0.08% | 2026-05-13 | 74,937 ( 0.08% ) | 5 M $ | 2026-08-30 |
| Companies | Position | Start |
|---|---|---|
| RLI CORP. | Director of Finance/CFO | 2025-12-31 |
RLI Insurance Co.
RLI Insurance Co. Property/Casualty InsuranceFinance Provides property and casualty insurance services | Chief Investment Officer | - |
Mt. Hawley Insurance Co.
Mt. Hawley Insurance Co. Property/Casualty InsuranceFinance Provides fire, marine, property damage and casualty insurance services | Chief Investment Officer | - |
Clear Blue Insurance Co.
Clear Blue Insurance Co. Property/Casualty InsuranceFinance Provides property and casualty insurance services | Chief Investment Officer | - |
Contractors Bonding & Insurance Co.
Contractors Bonding & Insurance Co. Life/Health InsuranceFinance Provides financial & diversified insurance services | Chief Investment Officer | - |
RLI Insurance Co. (Investment Portfolio)
RLI Insurance Co. (Investment Portfolio) Investment ManagersFinance RLI is a specialty property, casualty insurance and surety bond firm. The firm focuses on underwriting for profit. | Chief Investment Officer | 2011-12-31 |
| Companies | Position | End |
|---|---|---|
Northern Trust Investments, Inc.(Investment Management)
Northern Trust Investments, Inc.(Investment Management) Investment ManagersFinance NTI-IM employs a variety of security analysis methods in providing investment advisory services. The firm applies quantitative analysis methodologies in creating overlay investment strategies. Each investment strategy of the firm is managed by a team comprised of portfolio managers and investment analysts. Their asset class capabilities include equity, fixed income, liquidity and asset allocation. Strategy implementation ranges from passive and factor-based quantitative, to fundamental active and multi-manager. | Portfolio Manager-Equities | - |
SS&C Technologies, Inc.
SS&C Technologies, Inc. Investment ManagersFinance Provides asset management, managed IT, fund administration and retirement solutions | Corporate Officer/Principal | - |
Asset Allocation & Management Co. LLC
Asset Allocation & Management Co. LLC Investment ManagersFinance AAM specializes in the management of insurance company assets. The firm works with each client to develop a comprehensive portfolio strategy. They execute this approach across a wide range of asset classes and investment styles. Their investment grade fixed income strategy offers insurers a diversified portfolio that seeks to emphasize stable income, predictable cash flows and stable credit ratings. Insurance portfolios seek a yield-oriented approach within a risk-controlled framework that seeks to minimize credit impairments and deliver competitive return over a market cycle. | Portfolio Manager-Fixed Income | 2010-07-27 |
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1st degree companies
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| Private companies | 11 |
|---|---|
RLI Corp.
RLI Corp. Multi-Line InsuranceFinance Underwrites property and casualty insurance | Finance |
SS&C Technologies, Inc.
SS&C Technologies, Inc. Investment ManagersFinance Provides asset management, managed IT, fund administration and retirement solutions | Finance |
Northern Trust Investments, Inc.(Investment Management)
Northern Trust Investments, Inc.(Investment Management) Investment ManagersFinance NTI-IM employs a variety of security analysis methods in providing investment advisory services. The firm applies quantitative analysis methodologies in creating overlay investment strategies. Each investment strategy of the firm is managed by a team comprised of portfolio managers and investment analysts. Their asset class capabilities include equity, fixed income, liquidity and asset allocation. Strategy implementation ranges from passive and factor-based quantitative, to fundamental active and multi-manager. | Finance |
Contractors Bonding & Insurance Co.
Contractors Bonding & Insurance Co. Life/Health InsuranceFinance Provides financial & diversified insurance services | Finance |
Asset Allocation & Management Co. LLC
Asset Allocation & Management Co. LLC Investment ManagersFinance AAM specializes in the management of insurance company assets. The firm works with each client to develop a comprehensive portfolio strategy. They execute this approach across a wide range of asset classes and investment styles. Their investment grade fixed income strategy offers insurers a diversified portfolio that seeks to emphasize stable income, predictable cash flows and stable credit ratings. Insurance portfolios seek a yield-oriented approach within a risk-controlled framework that seeks to minimize credit impairments and deliver competitive return over a market cycle. | Finance |
Indiana University
Indiana University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Clear Blue Insurance Co.
Clear Blue Insurance Co. Property/Casualty InsuranceFinance Provides property and casualty insurance services | Finance |
RLI Insurance Co.
RLI Insurance Co. Property/Casualty InsuranceFinance Provides property and casualty insurance services | Finance |
Mt. Hawley Insurance Co.
Mt. Hawley Insurance Co. Property/Casualty InsuranceFinance Provides fire, marine, property damage and casualty insurance services | Finance |
Kellstadt Graduate School of Business
Kellstadt Graduate School of Business Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
RLI Insurance Co. (Investment Portfolio)
RLI Insurance Co. (Investment Portfolio) Investment ManagersFinance RLI is a specialty property, casualty insurance and surety bond firm. The firm focuses on underwriting for profit. | Finance |
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