Arrow Financial Corporation closed its Adirondack Bancorp acquisition on July 1, 2026 - a roughly $101 million deal that added approximately $1.0 billion in assets and 19 branches in Upstate and Central New York, and the second-quarter print is the last clean look at the pre-deal balance sheet. The headline did not flatter. Net income of $11.0 million ($0.66 diluted GAAP earnings per share) was up only 1.5% year over year against $10.8 million ($0.65 GAAP) in the second quarter of 2025, and it was down 18.7% from the $13.5 million ($0.82 GAAP) earned in the first quarter of 2026. Strip out the $1.0 million of Adirondack merger-related expenses carried in the quarter, and the second-quarter earnings were $0.71 per share on a non-GAAP core basis, exactly $0.01 better than the prior-year core $0.70. The first look said stagnation. The second look said the Adirondack drag absorbed roughly all the operating gain the franchise produced in the period.
The story that matters, however, is not in the GAAP gap. It is in the spread. Net interest income rose 10.4% year over year to $35.9 million, with the fully taxable-equivalent net interest margin expanding to 3.43% from 3.16% - a 27-basis-point jump, in a single year, on a balance sheet that grew only 1.6%. Asset yields rose 12 basis points to 5.11%, the cost of interest-bearing liabilities fell 19 basis points to 2.20%, and the net interest spread widened 31 basis points. The fully taxable-equivalent net interest margin for the half reached 3.45% versus 3.11% in the first half of 2025. Margin, not loan growth, is the engine. And then there is a one-time shadow sitting on top of it: a $1.6 million specific reserve on a single commercial real estate credit that the borrower pushed into bankruptcy during the quarter. Provision for credit losses rose to $2.8 million from $0.6 million a year earlier. Management called it isolated. The numbers are clean everywhere else, but the test of that claim is what the next two quarters show.
The capital return and the deal close define the second-look view. The bank declared its third-quarter dividend of $0.30 per share on the post-deal share count, took on $305.9 million of new borrowings during the quarter to fund the cash leg of the Adirondack consideration (and immediately used a portion to retire $125 million of those borrowings at close), ended with a 13.21% Common Equity Tier 1 ratio and a 14.98% Total Risk-Based Capital ratio - well above well-capitalized thresholds even after funding the deal - and finished the half with $446.3 million of stockholders' equity ($26.98 book value per share). The first look is a $0.66 print on a one-tick year-over-year gain, with a large reserve on one credit and a $1.0 billion acquisition landing on day 91. The second look is a margin that moved 27 basis points in twelve months, a deposit franchise that is now spread across 50+ branches, and an EPS accretion target that management says arrives in 2027. The thesis has two clocks - margin durability and credit at Adirondack - and the next two quarters set them.