Regional banking company First Interstate BancSystem (NASDAQ: FIBK) missed Wall Street’s revenue expectations in Q1 CY2026, with sales falling 2.7% year on year to $241.8 million. Its GAAP profit of $0.61 per share was 3.6% above analysts’ consensus estimates.
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First Interstate BancSystem (FIBK) Q1 CY2026 Highlights:
- Net Interest Income: $200.7 million vs analyst estimates of $201.2 million (2.1% year-on-year decline, in line)
- Net Interest Margin: 3.4% vs analyst estimates of 3.4% (3 basis point beat)
- Revenue: $241.8 million vs analyst estimates of $244.2 million (2.7% year-on-year decline, 1% miss)
- EPS (GAAP): $0.61 vs analyst estimates of $0.59 (3.6% beat)
- Tangible Book Value per Share: $22.06 vs analyst estimates of $22.08 (5.3% year-on-year growth, in line)
- Market Capitalization: $3.47 billion
“We are pleased to see continued improvement in our net interest margin and continue to execute on our previously announced share repurchase authorization,” said James A Reuter, President and Chief Executive Officer of the Company.
Company Overview
Tracing its roots back to 1971 and still guided by founding family principles, First Interstate BancSystem (NASDAQ: FIBK) operates a network of community banks across 14 western and midwestern states, offering comprehensive banking services to individuals, businesses, and government entities.
Sales Growth
From lending activities to service fees, most banks build their revenue model around two income sources. Interest rate spreads between loans and deposits create the first stream, with the second coming from charges on everything from basic bank accounts to complex investment banking transactions. Over the last five years, First Interstate BancSystem grew its revenue at a mediocre 8.8% compounded annual growth rate. This fell short of our benchmark for the banking sector and is a poor baseline for our analysis.
We at StockStory place the most emphasis on long-term growth, but within financials, a half-decade historical view may miss recent interest rate changes, market returns, and industry trends. First Interstate BancSystem’s recent performance shows its demand has slowed as its revenue was flat over the last two years. 
Note: Quarters not shown were determined to be outliers, impacted by outsized investment gains/losses that are not indicative of the recurring fundamentals of the business.
This quarter, First Interstate BancSystem missed Wall Street’s estimates and reported a rather uninspiring 2.7% year-on-year revenue decline, generating $241.8 million of revenue.
Net interest income made up 81.8% of the company’s total revenue during the last five years, meaning First Interstate BancSystem barely relies on non-interest income to drive its overall growth.
Our experience and research show the market cares primarily about a bank’s net interest income growth as non-interest income is considered a lower-quality and non-recurring revenue source.
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Tangible Book Value Per Share (TBVPS)
Banks operate as balance sheet businesses, with profits generated through borrowing and lending activities. Valuations reflect this reality, emphasizing balance sheet strength and long-term book value compounding ability.
This explains why tangible book value per share (TBVPS) stands as the premier banking metric. TBVPS strips away questionable intangible assets, revealing concrete per-share net worth that investors can trust. Other (and more commonly known) per-share metrics like EPS can sometimes be murky due to M&A or accounting rules allowing for loan losses to be spread out.
First Interstate BancSystem’s TBVPS grew at a sluggish 1.7% annual clip over the last five years. However, TBVPS growth has accelerated recently, growing by 6.6% annually over the last two years from $19.42 to $22.06 per share.
Over the next 12 months, Consensus estimates call for First Interstate BancSystem’s TBVPS to grow by 2.9% to $22.70, lousy growth rate.
Key Takeaways from First Interstate BancSystem’s Q1 Results
We struggled to find many positives in these results. Its revenue slightly missed and its EPS slightly exceeded Wall Street’s estimates. Overall, this was a softer quarter. The stock remained flat at $34.30 immediately after reporting.
First Interstate BancSystem’s latest earnings report disappointed. One quarter doesn’t define a company’s quality, so let’s explore whether the stock is a buy at the current price. We think that the latest quarter is only one piece of the longer-term business quality puzzle. Quality, when combined with valuation, can help determine if the stock is a buy. We cover that in our actionable full research report which you can read here (it’s free).
