OVERVIEW OF THE RESULTS OF OPERATIONS AND FINANCIAL CONDITION
RESULTS OF OPERATIONS SUMMARY
Third quarter 2021 compared to third quarter 2020
The Company reported net income available to common shareholders of $16.1 million for the three months ended September 30, 2021, compared with net income available to common shareholders of $11.9 million for the same period last year, an increase of $4.2 million or 35.4%. Provision for credit losses totaled $0 for the quarter ended September 30, 2021, a decrease of $6.9 million, or $5.3 million, net of tax, as compared to the third quarter of 2020. For the third quarter of 2021, fully diluted earnings per share were $0.76, compared to $0.55 for the third quarter of 2020.
Operating net earnings, a non-GAAP financial measure, for the third quarter of 2021 totaled $16.1 million compared to $12.1 million for the third quarter of 2020, an increase of $4.0 million or 33.2%. Operating net earnings, which is a non-GAAP financial measure, for the third quarter of 2021 excludes merger-related costs of $4 thousand, net of tax, loss on the sale of fixed assets of $297 thousand, net of tax, $1.4 million, net of tax, related to the U.S. Treasury Rapid Response Program (“RRP”), and $1.0 million, net of tax, in contributions, as a result of the RRP grant, to support projects that will benefit the underserved in the communities we serve. Operating net earnings, a non-GAAP financial measure, for the third quarter 2020 excludes merger-related costs of $177 thousand, net of tax. Diluted operating earnings per share, a non-GAPP financial measure, were $0.76 on a fully diluted basis for the third quarter 2021, compared to $0.56 for the same period in 2020, excluding the merger-related costs and income described above. See reconciliation of non-GAAP financial measures provided below.
Net interest income for the third quarter 2021 was $40.0 million, an increase of $55 thousand or 0.1%, for the three months ended September 30, 2021, compared to $40.0 million for the same period in 2020. Fully tax equivalent (“FTE”) net interest income, which is a non-GAAP measure, totaled $40.7 million and $40.6 million for the third quarter of 2021 and 2020, respectively. Purchase accounting adjustments decreased $686 thousand for the third quarter comparisons. Third quarter 2021 FTE net interest margin, which is a non-GAAP measure, of 3.3% included 10 basis points related to purchase accounting adjustments compared to 3.6% for the same quarter in 2020, which included 17 basis points related to purchase accounting adjustments. Excluding the purchase accounting adjustments, the net interest margin decreased 26 basis points in prior year quarterly comparison. See reconciliation of non-GAAP financial measures provided below.
Non-interest income for the three months ended September 30, 2021 was $9.6 million compared to $8.8 million for the same period in 2020, reflecting an increase of $792 thousand or 9.0%. This increase is attributed to the $1.8 million RRP grant from the U.S. Treasury and was offset by the decrease in mortgage income of $1.2 million.
Pre-tax, pre-provision operating earnings, a non-GAAP measure, decreased 6.9% to $20.5 million for the quarter-ended September 30, 2021 as compared to $22.1 million for the third quarter of 2020. Pre-tax, pre-provision operating earnings, a non-GAAP measure, for the third quarter 2021 excludes merger-related costs $5 thousand, loss on the sale of fixed assets of $397 thousand, $1.8 million related to the RRP grants, and $1.4 million in contributions, as a result of the RRP grant. Pre-tax, pre-provision operating earnings, a non-GAAP measure, for the third quarter 2020 excludes $238 thousand in acquisition charges and $6.9 million in provision for loan loss. See reconciliation of non-GAAP financial measures provided below.
Non-interest expense was $29.1 million for the three months ended September 30, 2021, an increase of $2.1 million or 7.9%, when compared with the same period in 2020. Charitable contributions of $1.4 million during the third quarter of 2021 contributed to the increase. These contributions related to the RRP grant and supported projects in underserved communities.
Investment securities totaled $1.485 billion, or 27.0% of total assets at September 30, 2021, compared to $984.9 million, or 19.1% of total assets at September 30, 2020. The average balance of investment securities increased $406.7 million in prior year quarterly comparison. The average tax equivalent yield on investment securities, which is a non-GAAP measure, 26 basis points to 2.2% from 2.5% in prior year quarterly comparison. The investment portfolio had a net unrealized gain of $18.2 million at September 30, 2021 as compared to a net unrealized gain of $33.2 million at September 30, 2020. See reconciliation of non-GAAP financial measures provided below.