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Acquisition-Related Intangible Assets, Net
 9 Months Ended
Oct. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Acquisition-Related Intangible Assets, Net Acquisition-Related Intangible Assets, Net
Acquisition-related intangible assets, net consisted of the following (in thousands):
October 31, 2023January 31, 2023
Developed technology$326,800 $342,700 
Customer relationships311,100 311,100 
Backlog15,000 15,000 
Trade name12,500 12,500 
Acquisition-related intangible assets, gross665,400 681,300 
Less accumulated amortization(416,158)(375,835)
Acquisition-related intangible assets, net$249,242 $305,465 
Amortization expense related to acquisition-related intangible assets was $16 million and $21 million for the three months ended October 31, 2023, and 2022, respectively, and $58 million and $64 million for the nine months ended October 31, 2023, and 2022, respectively.
As of October 31, 2023, our future estimated amortization expense related to acquisition-related intangible assets was as follows (in thousands):
Fiscal Period:
Remainder of 2024$16,088 
202562,198 
202656,283 
202731,712 
202827,346 
Thereafter55,615 
Total$249,242