Intangible assets, other than goodwill, consisted of the following as of March 31, 2026 and December 31, 2025, respectively: | | | | | | | | | | | | | | | | | | | (in millions) | Gross Carrying Amount | | Accumulated Amortization | | Net | | Intangible assets subject to amortization: | | | | | | | Customer relationships | $ | 288.1 | | | $ | (158.3) | | | $ | 129.8 | | | Acquired technology | 331.3 | | | (291.7) | | | 39.6 | | | Brand portfolio | 11.5 | | | (9.3) | | | 2.2 | | | Total intangible assets subject to amortization | $ | 630.9 | | | $ | (459.3) | | | $ | 171.6 | | | | | | | | | Intangible assets not subject to amortization | | | | | | | Pre-Acquisition ZI brand portfolio | $ | 33.0 | | | $ | — | | | $ | 33.0 | | | Total intangible assets not subject to amortization | $ | 33.0 | | | $ | — | | | $ | 33.0 | | | | | | | | | Total intangible assets | $ | 663.9 | | | $ | (459.3) | | | $ | 204.6 | |
| | | | | | | | | | | | | | | | | | | (in millions) | Gross Carrying Amount | | Accumulated Amortization | | Net | | Intangible assets subject to amortization: | | | | | | | Customer relationships | $ | 288.1 | | | $ | (153.4) | | | $ | 134.7 | | | Acquired technology | 331.3 | | | (284.2) | | | 47.1 | | | Brand portfolio | 11.5 | | | (9.0) | | | 2.5 | | Total intangible assets subject to amortization | $ | 630.9 | | | $ | (446.6) | | | $ | 184.3 | | | | | | | | Intangible assets not subject to amortization: | | | | | | | Pre-Acquisition ZI brand portfolio | $ | 33.0 | | | $ | — | | | $ | 33.0 | | Total intangible assets not subject to amortization | $ | 33.0 | | | $ | — | | | $ | 33.0 | | | | | | | | | Total intangible assets | $ | 663.9 | | | $ | (446.6) | | | $ | 217.3 | |
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