We had no material business acquisitions during the nine months ended September 30, 2023. During the year ended December 31, 2022, we completed two acquisitions of private companies for total consideration of $158.9 million including $4.0 million in common stock and the remainder in cash. The purchase prices included $62.3 million of intangible assets, $77.5 million of goodwill and $19.1 million of net tangible assets acquired. We also incurred certain acquisition-related expenses of $4.7 million, which primarily consisted of retention bonuses to continuing employees as well as professional and consulting fees.

The purchase price allocation for the two acquisitions have been finalized. No changes were made to the purchase price allocation for the three and nine months ended September 30, 2023.

Acquisition-related intangible assets, excluding those that are fully amortized, were as follows (in thousands, except years):


	Gross Carrying Amount						Accumulated Amortization						Net Carrying Amount				Weighted Average Remaining Useful Life (in years)
	December 31, 2022		Additions		September 30, 2023		December 31, 2022		Amortization		September 30, 2023		December 31, 2022		September 30, 2023
Developed technology	$	154,930	$	—	$	154,930	$	(79,036)	$	(19,262)	$	(98,298)	$	75,894	$	56,632	4.2
Customer relationships	54,620		—		54,620		(14,097)		(5,775)		(19,872)		40,523		34,748		5.0
Trade name	12,390		—		12,390		(6,602)		(1,710)		(8,312)		5,788		4,078		1.8
Total	$	221,940	$	—	$	221,940	$	(99,735)	$	(26,747)	$	(126,482)	$	122,205	$	95,458	4.4

Amortization expense related to acquisition-related intangible assets was $8.1 million and $9.3 million for the three months ended September 30, 2023 and 2022, respectively, and $26.7 million and $24.3 million for the nine months ended September 30, 2023 and 2022, respectively.

As of September 30, 2023, future estimated amortization expense related to the acquisition-related intangible assets is as follows (in thousands):


	Future Amortization Expense
Remainder of 2023	$	6,691
2024	26,759
2025	19,642
2026	17,260
2027	13,436
Thereafter	11,670
Total	$	95,458