Columbia Banking System shares rose 0.9% to $31.79 on Tuesday. The latest 10-Q describes a business that made considerably more money in the three months ended June 30, but delivered the same earnings per share as a year earlier.
Net income increased 36.8%, from $152.0 million to $208.0 million. Diluted EPS stayed at 73 cents because the diluted share count rose 36.4%, from 210.0 million to 286.5 million. Columbia doesn't say in the supplied filing receipts why the share count changed so sharply.
That is the central contrast: net income increased, but the increase did not reach each share. For shareholders, a larger profit pool is not the same thing as more profit per slice.
Management attributes the earnings increase to operating costs and funding, not to a surge in net interest income. The company said non-interest expense fell by $19 million as merger and restructuring costs declined and Pacific Premier acquisition savings continued to arrive.
"The decrease was primarily due to a $15 million reduction in merger and restructuring expense following the systems conversion completed during the first quarter, as well as the continued realization of cost savings associated with the Pacific Premier acquisition."
Columbia Banking System, 10-Q, Aug. 4, 2026
The systems conversion is now behind the company, and some of the acquisition savings are showing up in expenses. That gives the profit increase a specific operational source, even as the per-share result stays flat.
Funding helped too. Columbia said lower funding costs and a shift toward customer deposits away from borrowings and brokered deposits supported the increase. In plain English, the bank says the money it uses to fund itself became cheaper, and the mix improved.
"The increase was primarily attributable to lower funding costs and a favorable balance sheet mix shift toward lower-cost customer deposits and away from higher-cost wholesale funding sources, which include borrowings and brokered deposits."
Columbia Banking System, 10-Q, Aug. 4, 2026
The same filing also says net interest income for the three months was $589 million, down $5 million from the prior quarter, with lower average interest-earning assets and lower yields on taxable securities contributing to the decline. The cost savings and funding mix were doing the lifting while the core spread income line was not expanding sequentially.
The share-count issue is not entirely new in the company's own annual record. Revenue reached $177.0 million in 2025, up 18.8% year over year, while diluted shares increased 14.2%. The latest quarter makes the arithmetic more immediate: this time, net income grew by roughly the same percentage as shares, leaving EPS unchanged.
At a latest annual P/E of 13.8x, the supplied valuation data places the stock at that earnings multiple. The current filing makes the diluted share count an important part of the comparison. Columbia's next quarterly report will provide the clean comparison for whether diluted shares remain near 286.5 million and whether the earnings increase begins to appear in EPS.
For now, the bank is getting more profit from lower costs and cheaper funding, while shareholders are getting the same per-share figure. More earnings, same slice: the filing's central contrast.
Columbia Banking System's 10-Q shows higher net income, unchanged diluted EPS, and a sharply larger diluted share count for the three months ended June 30, 2026.