Intangible assets
Intangible Assets
Intangible assets consisted of the following:
December 31, 2024December 31, 2025
Gross
carrying
amount
Accumulated
amortization
Net book
value
Gross
carrying
amount
Accumulated
amortization
Net book
value
License$38,433 $29,111 $9,322 $16,620 $8,968 $7,652 
Technology52,700 19,909 32,791 52,700 21,971 30,729 
 $91,133 $49,020 $42,113 $69,320 $30,939 $38,381 
Amortization expense related to intangible assets for the years ended December 31, 2023, 2024 and 2025 was $11.6 million, $14.3 million and $3.7 million, respectively.
For the year ended December 31, 2024, the Company recorded a full impairment charge of the carrying value of $32.0 million (or $23.3 million, net of deferred income tax) associated with the IPR&D acquired through the 2021 acquisition of TetraGenetics and a full impairment charge of the carrying value of $32.0 million (or $23.3 million, net of deferred income tax) associated with the IPR&D acquired through the 2020 acquisition of Trianni. Details of a corresponding impact reducing the contingent consideration associated with the TetraGenetics acquisition are disclosed in Note 15.
The impairment charges were due to our ongoing internal program prioritization which also resulted in the discontinuance of the development of next-generation transgenic mice. Depreciation and amortization expense and impairment charges are reflected within depreciation, amortization, and impairment expense on the consolidated statements of loss and comprehensive loss.
Amortization expense on intangible assets subject to amortization is estimated to be as follows for each of the next five years ended December 31:
Amortization
Expense
2026$3,732 
20273,732 
20283,732 
20293,732 
20302,632 
$17,560 

Historical Timeline

Fiscal YearFiled
2025Feb 24, 2026Showing above
2024Feb 27, 2025
2023Feb 20, 2024
2022Feb 21, 2023
2021Feb 25, 2022

About Goodwill & Intangibles Disclosures

Goodwill and intangible asset disclosures reveal the premium paid in acquisitions and how management assesses whether that premium retains its value. Since goodwill is no longer amortized under US GAAP, the annual impairment test is the only mechanism that adjusts carrying values downward — making the assumptions behind that test critically important for investors.

Key signals: a history of goodwill impairments suggests management consistently overpays for acquisitions. Watch the gap between reporting unit fair value and carrying amount — when fair value exceeds carrying amount by less than 10-20%, a small decline in business performance could trigger a write-down. For finite-lived intangibles, examine useful life assumptions across customer relationships, technology, and trade names; aggressive estimates inflate near-term earnings. Compare total intangibles-to-total-assets ratios against peers to assess acquisition dependency. Rising goodwill as a percentage of equity can signal balance sheet fragility.