First Interstate BancSystem (FIBK) Puts Margin Momentum Front and Center in Q2 2026

Overview: EPS, NIM, and a Quiet Revenue Narrative

The ticker FIBK reported a second-quarter 2026 EPS of $0.87 on net income of $83.9 million. That compares to $0.61 per diluted share and $60.2 million in the first quarter of 2026, and $0.69 per diluted share on $71.7 million for the second quarter of 2025. Management styled the quarter as a step forward on earnings power, anchored by margin gains and a one-time gain from strategic branch sales.

As with many bank disclosures, the press release invites readers to parse the underlying pace of growth versus the EPS consensus and whether the quarterly results constitute an earnings surprise. The release, however, does not publish a revenue forecast, which means investors must infer revenue trajectory from the mix of lending, deposits, and fee-based activity—no explicit revenue guide to anchor the story just yet.

Operational Highlights

• Branch dispositions: Completed the sale of eleven Nebraska branches on April 10, 2026, delivering a $19.5 million gain in the second quarter of 2026.
• NIM: Net interest margin rose to 3.45% in Q2 2026, up 4 basis points from Q1 2026 and 15 basis points year over year.
• Credit quality: Criticized loans decreased to $937.4 million as of June 30, 2026, from $1,033.2 million at March 31, 2026, and from $1,203.0 million as of June 30, 2025.
• Charge-offs: Net charge-offs rose to $9.7 million (annualized 0.27% of average loans) as of June 30, 2026, from $2.4 million (0.06% annualized) at March 31, 2026, and $5.8 million (0.14%) as of June 30, 2025.
• Non-performing assets: NPA balance increased to $165.0 million as of June 30, 2026, up from $162.5 million at March 31, 2026, and down from $197.5 million a year earlier.
• Deposits: Total deposits declined by $441.7 million to $21,441.3 million as of June 30, 2026, largely reflecting the Nebraska branch sales that included $244.2 million of deposits. YoY deposits also fell by about $1.189 billion (5.3%) versus June 30, 2025.
• : Other borrowed funds were effectively zero as of June 30, 2026 and March 31, 2026, compared with $250 million at June 30, 2025.
• Capital return: In Q2 2026, the company repurchased ~1.93 million shares for $68.7 million. Total repurchases since August 2025 reached ~7.98 million shares for $270.3 million. As of June 30, 2026, about $29.7 million remained available under the $300 million authorization. On July 22, 2026, the board approved a further increase to the buyback program by $150 million, bringing the total authorization to $450 million since adoption in August 2025.
• Capital strength: Common equity tier 1 capital ratio expanded by 24 basis points in the quarter to 14.54%.

From the CEO: A Focus on Margin, Credit Quality, and Returns

“We are pleased to see continued improvement in our net interest margin and meaningful progress reducing criticized loans, as we remain focused on strengthening the quality and earnings power of the franchise,” said James A. Reuter, President and Chief Executive Officer of the Company. “We also continued to execute on our previously announced share repurchase authorization and are expanding that authorization, underscoring our commitment to shareholder returns. Production and underlying account growth improved during the quarter, although elevated prepayment activity offset this momentum in reported balances. Many of the outcomes reflect deliberate actions that improve the long-term value of the franchise. Through ongoing fixed asset repricing, disciplined capital deployment, operating model optimization, and continued investment in relationship growth, we are building a more efficient organization and remain confident in our ability to deliver improving returns over time.”

Liquidity, Deposits, and the Branch Strategy

The Nebraska branch sales illustrate a deliberate pivot in footprint and funding. While the immediate effect is a deposit headwind—caused in large part by the sale that included $244.2 million of deposits—management is signaling that the move supports a leaner, more risk-aligned balance sheet. The broader market will watch whether deposit attrition stabilizes in the quarters ahead and how the franchise funds loan growth in a rising-rate environment.

Capital Allocation: Levers That Could Tilt Peer Comparisons

Beyond the Nebraska exits, the bank has leaned into capital returns with a steady rhythm of buybacks. The combination of a robust CET1 ratio (14.54%) and an active repurchase program signals a confidence in the balance sheet’s ability to sustain earnings power even as the asset mix shifts. The additional authorization to buy back another $150 million signals a readiness to translate capital into value for shareholders, a move peers may interpret as a barometer for how aggressively to deploy buybacks in a higher-rate regime.

Outlook for FIBK and Sector Peers

What this quarter portends for the sector is a two-step narrative. First, the margin is proving more resilient in the face of structure changes, aided by pricing power and asset re-pricing that the bank has described as ongoing. Second, the deposit base remains exposed to strategic divestitures and selective asset sales, a dynamic that will likely echo across mid-sized regional banks with similar footprints.

For sector peers, the Nebraska move provides a blueprint for value realization: monetize non-core branches, maintain a disciplined balance sheet, and lean into capital returns when you’ve got a CET1 cushion that can bear it. Yet the credit backdrop—modest upticks in net charge-offs and a modest rise in non-performing assets—serves as a reminder that the balance sheet still carries credit-risk discipline as a priority. As long as the revenue narrative stays murky (the release does not publish a revenue forecast), investors will rely on the combination of NIM trajectory, asset-quality trends, and buyback tempo to judge whether this is a durable earnings story or a tactical adjustment.

Bottom Line

Q2 2026 for FIBK paints a picture of margin resilience and disciplined capital management set against a backdrop of strategic divestitures that trimmed the deposit base. The EPS of $0.87 reflects a meaningful step forward from the prior quarter, while the cash-flow dynamics—and the accelerated buyback program—signal a management team intent on translating balance-sheet discipline into returns. Sector peers will be watching not just the headline numbers, but how the bank sustains NIM, manages loan quality, and uses capital returns as a signaling device in a competitive, rate-sensitive landscape.