The change in the carrying value of goodwill for the six months ended June 30, 2026, categorized by reportable segment, is as follows (in thousands):


	Clear Aligner		Systems and Services		Total
Balance as of December 31, 2025	$	164,255	$	327,578	$	491,833
Additions from acquisition1	—		18,588		18,588
Foreign currency translation adjustments	(2,719)		(10,401)		(13,120)
Balance as of June 30, 2026	$	161,536	$	335,765	$	497,301

1 We recorded $18.6 million of goodwill within the Systems and Services segment for an immaterial acquisition that was completed in the first quarter of 2026. The amount recorded is based on preliminary estimates of the fair values of assets acquired and liabilities assumed and is subject to adjustment during the measurement period.

Acquired intangible assets, excluding intangibles that were fully amortized, are as follows (in thousands):


	Weighted Average Amortization Period (in years)	Gross Carrying Amount as of June 30, 2026		Accumulated Amortization		Net Carrying Value as of June 30, 2026
Existing technology	11	$	146,652	$	(74,561)	$	72,091
Customer relationships	10	21,500		(13,438)		8,062
Trademarks and tradenames	7	9,800		(8,750)		1,050
Patents	12	480		(340)		140
Total finite-lived intangible assets		178,432		(97,089)		81,343
In-process research and development1		12,558				12,558
Foreign currency translation adjustments						1,026
Total intangible assets, net						$	94,927

1 In connection with the immaterial acquisition completed during the first quarter of 2026, the Company recorded $12.6 million in acquired in-process research and development within the Systems and Services segment. Acquired in-process research and development is considered an indefinite-lived intangible asset until completion of the associated research and development efforts at which time the asset will be amortized over its estimated useful life.


	Weighted Average Amortization Period (in years)	Gross Carrying Amount as of December 31, 2025		Accumulated Amortization		Net Carrying Value as of December 31, 2025
Existing technology	11	$	146,651	$	(67,138)	$	79,513
Customer relationships	10	21,500		(12,363)		9,137
Trademarks and tradenames	7	9,800		(8,050)		1,750
Patents	12	480		(320)		160
Total finite-lived intangible assets		$	178,431	$	(87,871)	90,560
Foreign currency translation adjustments						3,373
Total intangible assets, net						$	93,933

The total estimated future amortization expense for the acquired finite-lived intangible assets as of June 30, 2026 is as follows (in thousands):


Fiscal Year Ending December 31,	Amortization
Remainder of 2026	$	8,705
2027	15,607
2028	14,505
2029	14,505
2030	6,328
2031	3,615
Thereafter	18,078
Total	$	81,343

Amortization expense for the three months ended June 30, 2026 and 2025 was $4.8 million and $4.7 million, respectively. Amortization expense for the six months ended June 30, 2026 and 2025 was $9.6 million and $9.3 million, respectively.