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INTANGIBLE ASSETS AND GOODWILL | 3 Months Ended
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Mar. 31, 2026
INTANGIBLE ASSETS AND GOODWILL |
INTANGIBLE ASSETS AND GOODWILL | (4) INTANGIBLE ASSETS AND GOODWILL 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
​ 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
​ There were no changes to the carrying value of the Company’s goodwill in the three months ended March 31, 2026. 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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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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