Columbia Banking System (COLB) opened 2026 with Q1 revenue of US$649 million and basic EPS of US$0.66, alongside trailing twelve month revenue of about US$2.3 billion and EPS of US$2.53 that reflect the earnings run rate coming into the quarter. Over recent periods, revenue has moved from US$459 million in Q4 2024 to US$694 million in Q4 2025 and US$649 million in Q1 2026, while quarterly EPS has ranged from US$0.41 in Q1 2025 to US$0.73 in Q2 2025 before landing at US$0.66 this quarter. This sets up an earnings story where net interest margin, cost to income ratio and credit quality will be key for how you read the results.

See our full analysis for Columbia Banking System.

With the headline numbers on the table, the next step is to set these results against the main stories investors follow about Columbia Banking System and see which narratives the latest margins and credit trends support or challenge.

3.96% net interest margin with a 53.68% cost ratio

• Q1 2026 net interest margin sits at 3.96%, while the cost to income ratio is 53.68%. Together, these figures give a snapshot of how much Columbia Banking System earns on loans and securities versus what it spends to run the bank.
• Analysts' consensus view focuses on operating leverage over time, and these margins link directly to that idea, but:
  • The net interest margin of 3.96% compares with a trailing 12 month net profit margin of 28%, so profitability on the income statement is consistent with the view that efficiency initiatives and cost control are important for long term earnings.
  • At the same time, the cost to income ratio at 53.68% means expenses still account for a little more than half of revenue. That leaves room for the consensus narrative about digital banking and efficiency projects to be assessed against future cost trends.

Credit quality: US$261 million in non performing loans

• Non performing loans are reported at US$261 million in Q1 2026, compared with US$198 million in Q4 2025 and US$167 million in Q4 2024, so the pool of loans that are not paying as agreed is higher than in the recent past.
• Critics highlight that regional and client concentration can affect credit quality, and the movement in non performing loans connects directly to that concern, because:
  • The business is described as heavily focused on Western U.S. markets, which some investors see as a risk if those local economies soften. Higher non performing loans would be one way that local economic pressure could show up in the numbers.
  • Some investors also point to integration risk from recent and planned mergers. Any issues in underwriting or risk controls during integration could contribute to the US$261 million in non performing loans that investors now have to factor into their view of net margins.

Valuation gap: US$29.22 price vs DCF value of US$66.62

• The current share price of US$29.22 is well below the stated DCF fair value of US$66.62 and below an analyst price target of US$31.77, while the trailing P/E of 12.9x is higher than peers at 11.2x and the US Banks industry at 11.5x.
• Consensus commentary often focuses on long term earnings and business expansion, and the valuation mix gives both optimistic and cautious readers several points to consider, because:
  • On the reward side, trailing 12 month earnings grew 31.8% with a 28% net profit margin, and the stock carries a 5.07% dividend yield. These factors help explain why some investors may accept a P/E premium even though the shares trade below the quoted DCF fair value.
  • On the risk side, shareholders experienced substantial dilution over the past year and analysts report only a modest gap between the current price and the US$31.77 target. Anyone focusing on the larger DCF gap may want to weigh that against the higher P/E versus peers and the additional shares now in the market.

Next Steps

To see how these results tie into long-term growth, risks, and valuation, check out the full range of community narratives for Columbia Banking System on Simply Wall St. Add the company to your watchlist or portfolio so you'll be alerted when the story evolves.

Mixed messages in the numbers or a clear story taking shape? If you want to test the bullish and cautious angles against the full set of figures, start by weighing up the company's 4 key rewards and 1 important warning sign.

See What Else Is Out There

Columbia Banking System combines a higher-than-peer P/E ratio with rising non performing loans and recent shareholder dilution, which introduces valuation and risk questions for some investors.

If those credit and dilution concerns make you want a steadier profile, compare this story with 72 resilient stocks with low risk scores today and see how other companies stack up.

This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.