RANKING ·
Largest net interest margin improvement in Montana
30 of 35 banks in Montana that filed for the quarter ended June 30, 2026 are ranked. At least $100 million in total assets and a comparable quarter a year earlier. Institutions with equal values share a rank. Source: FDIC quarterly financial data.
| Rank | Institution | Headquarters | Net interest margin, change over 12 months | Total assets |
|---|---|---|---|---|
| 1 | Three Rivers Bank of Montana | Kalispell, MT | +84 bps | $293 million |
| 2 | Glacier Bank | Kalispell, MT | +67 bps | $31.6 billion |
| 3 | Valley Bank of Kalispell | Kalispell, MT | +57 bps | $218 million |
| 4 | Independence Bank | Havre, MT | +51 bps | $1.4 billion |
| 5 | Madison Valley Bank | Ennis, MT | +44 bps | $264 million |
| 6 | The First State Bank of Malta | Malta, MT | +41 bps | $190 million |
| 7 | American Bank | Bozeman, MT | +39 bps | $630 million |
| 8 | Bank of Bridger N.A. | Bridger, MT | +36 bps | $803 million |
| 9 | The First State Bank of Shelby | Shelby, MT | +35 bps | $176 million |
| 10 | First Montana Bank Inc. | Missoula, MT | +33 bps | $530 million |
| 11 | First State Bank of Forsyth | Forsyth, MT | +33 bps | $166 million |
| 12 | Trailwest Bank | Lolo, MT | +32 bps | $1.1 billion |
| 13 | Farmers State Bank | Victor, MT | +29 bps | $790 million |
| 14 | Bank of the Rockies | Helena, MT | +26 bps | $277 million |
| 15 | Ascent Bank | Helena, MT | +26 bps | $104 million |
| 16 | Opportunity Bank of Montana | Helena, MT | +22 bps | $2.1 billion |
| 17 | Manhattan Bank | Manhattan, MT | +22 bps | $287 million |
| 18 | First Interstate Bank | Billings, MT | +17 bps | $25.8 billion |
| 19 | Little Horn State Bank | Hardin, MT | +13 bps | $413 million |
| 20 | Bank of Bozeman | Bozeman, MT | +11 bps | $108 million |
| 21 | Eagle Bank | Polson, MT | +3 bps | $180 million |
| 22 | The Bank of Baker | Baker, MT | +1 bps | $161 million |
| 23 | Citizens Bank & Trust Company | Big Timber, MT | -2 bps | $155 million |
| 24 | The Yellowstone Bank | Laurel, MT | -6 bps | $1.3 billion |
| 25 | Stockman Bank of Montana | Miles City, MT | -7 bps | $7.7 billion |
| 26 | Valley Bank of Ronan | Ronan, MT | -10 bps | $218 million |
| 27 | Garfield County Bank | Jordan, MT | -14 bps | $108 million |
| 28 | Pioneer Federal Savings & Loan Association | Deer Lodge, MT | -29 bps | $134 million |
| 29 | Freedom Bank | Columbia Falls, MT | -37 bps | $157 million |
| 30 | Bank of Montana | Missoula, MT | -68 bps | $309 million |
Rankings sort one published measure; they are not an overall judgment of any institution. Methodology · All rankings