| Intangible assets and goodwill |
Intangible assets and goodwill Intangible assets The gross carrying amount and associated accumulated amortization of intangible assets were as follows: | | | | | | | | | | | | | | | | | | | April 30, 2026 | | (in thousands) | Gross carrying amount | | Accumulated amortization | | Net carrying amount | | Amortizable intangible assets: | | | | | | | Software and software development costs | $ | 370,113 | | | $ | (289,418) | | | $ | 80,695 | | | Acquired HSA portfolios | 737,304 | | | (185,800) | | | 551,504 | | | Acquired customer relationships | 759,782 | | | (321,436) | | | 438,346 | | | Acquired developed technology | 132,825 | | | (130,325) | | | 2,500 | | | Acquired trade names | 12,900 | | | (12,900) | | | — | | | Total amortizable intangible assets | $ | 2,012,924 | | | $ | (939,879) | | | $ | 1,073,045 | |
| | | | | | | | | | | | | | | | | | | January 31, 2026 | | (in thousands) | Gross carrying amount | | Accumulated amortization | | Net carrying amount | | Amortizable intangible assets: | | | | | | | Software and software development costs | $ | 356,597 | | | $ | (278,291) | | | $ | 78,306 | | | Acquired HSA portfolios | 737,304 | | | (173,687) | | | 563,617 | | | Acquired customer relationships | 759,782 | | | (308,512) | | | 451,270 | | | Acquired developed technology | 132,825 | | | (128,846) | | | 3,979 | | | Acquired trade names | 12,900 | | | (12,900) | | | — | | | Total amortizable intangible assets | $ | 1,999,408 | | | $ | (902,236) | | | $ | 1,097,172 | |
Amortization expense was $37.7 million and $38.1 million for the three months ended April 30, 2026 and 2025, respectively. Goodwill There were no changes to the carrying value of goodwill during the three months ended April 30, 2026.
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