RANKING ·
Largest net interest margin improvement in Connecticut
21 of 64 credit unions in Connecticut 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: NCUA Call Report data.
| Rank | Institution | Headquarters | Net interest margin, change over 12 months | Total assets |
|---|---|---|---|---|
| 1 | Connex Credit Union | North Haven, CT | +34 bps | $1.1 billion |
| 2 | Dutch Point Credit Union | Wethersfield, CT | +29 bps | $565 million |
| 3 | Charter Oak Federal Credit Union | Waterford, CT | +27 bps | $1.7 billion |
| 4 | Achieve Financial Credit Union | Berlin, CT | +24 bps | $176 million |
| 5 | Sound Federal Credit Union | Norwalk, CT | +23 bps | $116 million |
| 6 | Nutmeg State Financial Credit Union | Rocky Hill, CT | +22 bps | $916 million |
| 7 | 360 Federal Credit Union | Windsor Locks, CT | +19 bps | $324 million |
| 8 | Finex Credit Union | East Hartford, CT | +19 bps | $134 million |
| 9 | Connecticut State Employees Credit Union | Hartford, CT | +19 bps | $2.7 billion |
| 10 | Coreplus Federal Credit Union | Norwich, CT | +18 bps | $676 million |
| 11 | Membersfirst Ct Federal Credit Union | Meriden, CT | +13 bps | $107 million |
| 12 | Mutual Security Credit Union | Shelton, CT | +11 bps | $385 million |
| 13 | American Eagle Financial Credit Union | East Hartford, CT | +7 bps | $2.8 billion |
| 14 | Sikorsky Financial Credit Union | Stratford, CT | +5 bps | $1.5 billion |
| 15 | Waterbury Connecticut Teachers Federal Credit Union | Waterbury, CT | -2 bps | $365 million |
| 16 | Fd Community Federal Credit Union | Waterbury, CT | -3 bps | $163 million |
| 17 | United Business & Industry Federal Credit Union | Plainville, CT | -4 bps | $141 million |
| 18 | Ellafi Federal Credit Union | Middletown, CT | -4 bps | $178 million |
| 19 | Hartford Federal Credit Union | Hartford, CT | -9 bps | $160 million |
| 20 | America'S First Network Credit Union | East Hartford, CT | -18 bps | $105 million |
| 21 | General Electric Employees Federal Credit Union | Milford, CT | -20 bps | $283 million |
Rankings sort one published measure; they are not an overall judgment of any institution. Methodology · All rankings