income of $17.0 million and a combined ratio of 75.0% during the same period last year. The Company’s adjusted underwriting income(1) was $23.5 million resulting in an adjusted combined ratio(1) of 71.4% in the fourth quarter compared to adjusted underwriting income(1) of $19.9 million and an adjusted combined ratio(1) of 70.7% during the same period last year.
Investment Results
Net investment income increased by 81.6% to $4.4 million compared to $2.4 million in the prior year’s fourth quarter. The increase was primarily due to higher yields on invested assets and a higher average balance of investments held during the three months ended December 31, 2022 due to cash generated from operations. The weighted average duration of the fixed-maturity investment portfolio, including cash equivalents, was 3.81 years at December 31, 2022. Cash and invested assets totaled $621.8 million at December 31, 2022. During the fourth quarter, the Company recorded net realized and unrealized gains of $0.8 million related to its investment portfolio as compared to realized and unrealized gains of $2.0 million in last year’s fourth quarter.
Tax Rate
The effective tax rate for the three months ended December 31, 2022 was 24.9% compared to 22.3% for the three months ended December 31, 2021. For the current quarter and prior year quarter, the Company’s income tax rate differed from the statutory rate due primarily to non-deductible executive compensation expense.
Stockholders’ Equity and Returns
Stockholders' equity was $384.8 million at December 31, 2022, compared to $394.2 million at December 31, 2021. For the three months ended December 31, 2022, the Company’s annualized return on equity was 19.9% compared to 17.2% for the same period in the prior year while adjusted return on equity(1) was 22.4% compared to 18.2% for the same period in the prior year. During the current quarter, the Company repurchased 222,217 shares for $11.1 million of the Company’s previously announced $100 million share repurchase authorization. As of December 31, 2022, $65.6 million remains available for future repurchases.
Full Year 2023 Outlook
For the full year 2023, the Company expects to achieve adjusted net income of $86 million to $90 million. This includes catastrophe flood losses incurred in the first quarter of approximately $2.5 million. The expected results do not include any additional catastrophe losses.
Conference Call
As previously announced, Palomar will host a conference call Thursday February 16, 2023, to discuss its fourth quarter and full year 2022 results at 12:00 p.m. (Eastern Time). The conference call can be accessed live by dialing 1-877-423-9813 or for international callers, 1-201-689-8573, and requesting to be joined to the Palomar Fourth Quarter 2022 Earnings Conference Call. A replay will be available starting at 4:00 p.m. (Eastern Time) on February 16, 2023, and can be accessed by dialing 1-844-512-2921, or for international callers, 1-412-317-6671. The passcode for the replay is 13735679. The replay will be available until 11:59 p.m. (Eastern Time) on February 23, 2023.
Interested investors and other parties may also listen to a simultaneous webcast of the conference call by logging onto the investor relations section of the Company’s website at http://ir.palomarspecialty.com/. The online replay will remain available for a limited time beginning immediately following the call.
About Palomar Holdings, Inc.
Palomar Holdings, Inc. is the holding company of subsidiaries Palomar Specialty Insurance Company (“PSIC”), Palomar Specialty Reinsurance Company Bermuda Ltd., Palomar Insurance Agency, Inc. and Palomar Excess and Surplus Insurance Company (“PESIC”). Palomar is an innovative insurer serving residential and commercial clients in specialty markets including the market for earthquake insurance. Palomar’s insurance subsidiaries, Palomar Specialty Insurance Company, Palomar Specialty Reinsurance Company Bermuda Ltd., and Palomar Excess and Surplus Insurance Company, have a financial strength rating of “A-” (Excellent) from A.M. Best.
To learn more, visit PLMR.com.
Non-GAAP and Key Performance Indicators
Palomar discusses certain key performance indicators, described below, which provide useful information about the Company’s business and the operational factors underlying the Company’s financial performance.
Underwriting revenue is a non-GAAP financial measure defined as total revenue, excluding net investment income and net realized and unrealized gains and losses on investments. See “Reconciliation of Non-GAAP Financial Measures” for a reconciliation of total revenue calculated in accordance with GAAP to underwriting revenue.