FIBK vs GBCI: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of August 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. FIBK and GBCI share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined FIBK and GBCI exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

First Interstate BancSystem is a financial services holding company headquartered in Billings, Montana, and the parent of First Interstate Bank, a community bank with more than 300 branches spread across roughly 14 Western and Midwestern states including Montana, Wyoming, the Dakotas, Colorado, Oregon, and Nebraska. It is the largest bank based in Montana by assets, carrying roughly $27 billion in total assets, and it earns most of its money the traditional way: gathering local deposits and lending them out to consumers, small businesses, agriculture, and commercial real estate borrowers, supplemented by wealth management and payments fees.

Full FIBK guide

Glacier Bancorp is a bank holding company based in Kalispell, Montana, that operates through Glacier Bank and roughly seventeen locally branded divisions (including Altabank, Mountain West Bank, First Security Bank, Heritage Bank of Nevada, and others) across Montana, Idaho, Utah, Colorado, Wyoming, Arizona, Nevada, and Washington. Its model keeps decision-making and branding local while the parent supplies capital, risk management, technology, and acquisition expertise. Revenue comes mostly from recurring net interest income on loans to households, small businesses, commercial and real-estate operators, and agricultural customers, supplemented by fees, mortgage banking, and wealth services.

Full GBCI guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• FIBK drivers: Net interest margin recovery; Capital return.
• GBCI drivers: Acquisition-driven growth; Net interest margin recovery.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: As a regional bank, FIBK is exposed to interest rate swings that can compress margins and mark down its securities portfolio. For GBCI, as a lender concentrated in the Mountain West, Glacier carries regional economic and commercial real estate concentration risk, so a downturn in local property or agricultural markets could raise credit losses.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick FIBK if you believe its drivers more; GBCI if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the FIBK and GBCI guides.

FIBK. FIBK reported net income of about $60 million, or $0.61 per diluted share, in the first quarter of 2026, up from $0.49 a year earlier as margin improved. The stock trades around a mid-teens earnings multiple and roughly book value, typical for a slower-growth regional bank. The heavy dividend yield near 5% is a defining feature of the valuation and reflects both the payout policy and the market's modest growth expectations.

GBCI. Glacier trades at a P/E in the low-20s, a premium to many peers that reflects its long dividend record and acquisition-led growth. The quarterly dividend is about $0.33 per share, for a yield near 2.5 percent. Total assets surpassed $30 billion in 2025 after record M&A, and tangible book value per share was roughly $21 as of Q1 2026.

Headline figures (approximate, July 2026): FIBK shows total revenue (ttm) ~$1.05B, diluted eps (q1 2026) ~$0.61, net interest margin ~3.41%, market cap ~$3.7B; GBCI shows total revenue (2025) ~$959M, net interest income (q1 2026) ~$269M, net income (2025) ~$239M, diluted eps (q1 2026) ~$0.63.

FIBK and GBCI are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined FIBK and GBCI exposure against your real portfolio. It is not an investment adviser.