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INTANGIBLE ASSETS AND GOODWILL (Tables) | 3 Months Ended
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Mar. 31, 2026
INTANGIBLE ASSETS AND GOODWILL |
Schedule of intangible assets | The Company’s intangible assets at March 31, 2026 and December 31, 2025 consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ ​ ​ | Weighted | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | average | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | amortization | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Net
​ | ​ | period | ​ ​ ​ | ​ | ​ | ​ ​ ​ | Accumulated | ​ ​ ​ | carrying
March 31, 2026 | ​ ​ ​ | (years) | ​ | Cost | ​ ​ ​ | amortization | ​ ​ ​ | value
Developed technology | ​ | 7.84 | ​ | $ | 340,380 | ​ | $ | 285,357 | ​ | $ | 55,023
Customer relationships | ​ | 11.86 | ​ | ​ | 268,140 | ​ | ​ | 190,118 | ​ | ​ | 78,022
Software licenses |  | 3.00 |  | ​ | 6,855 |  | ​ | 5,667 |  | ​ | 1,188
Trade names | ​ | 3.88 | ​ | ​ | 5,000 | ​ | ​ | 5,000 | ​ | ​ | —
​ |  | ​ | ​ | $ | 620,375 | ​ | $ | 486,142 | ​ | $ | 134,233
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ ​ ​ | Weighted | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | average | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | amortization | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Net
​ | ​ | period | ​ ​ ​ | ​ | ​ | ​ ​ ​ | Accumulated | ​ ​ ​ | carrying
December 31, 2025 | ​ ​ ​ | (years) | ​ | Cost | ​ ​ ​ | amortization | ​ ​ ​ | value
Developed technology | ​ | 7.84 | ​ | $ | 340,380 | ​ | $ | 281,000 | ​ | $ | 59,380
Customer relationships | ​ | 11.86 | ​ | ​ | 268,140 | ​ | ​ | 184,462 | ​ | ​ | 83,678
Software licenses |  | 3.00 |  | ​ | 5,748 |  | ​ | 5,462 |  | ​ | 286
Trade names | ​ | 3.88 | ​ | ​ | 5,000 | ​ | ​ | 5,000 | ​ | ​ | —
​ |  | ​ | ​ | $ | 619,268 | ​ | $ | 475,924 | ​ | $ | 143,344
Schedule of estimated future amortization expense for intangible assets | Estimated future amortization expense for the Company’s intangible assets at March 31, 2026 was as follows (in thousands):
​ | ​ | ​
Years ending December 31, | ​ | ​
Remainder of 2026 | $ | 29,292
2027 | ​ | 34,347
2028 |  | 23,769
2029 |  | 18,380
2030 |  | 7,723
2031 | ​ | 5,927
Thereafter | ​ | 14,795
​ | $ | 134,233
Schedule of goodwill | The components of goodwill at both March 31, 2026 and December 31, 2025 were as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Cloud and | ​ ​ ​ | IP Optical | ​ ​ ​ | ​ | ​
​ | Edge | ​ | Networks | ​ | Total
Goodwill | $ | 392,302 | ​ | $ | 191,996 | ​ | $ | 584,298
Accumulated impairment losses |  | (167,406) | ​ |  | (116,000) | ​ |  | (283,406)
​ | $ | 224,896 | ​ | $ | 75,996 | ​ | $ | 300,892
​

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