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Equity Plans and Stock-based Compensation
 6 Months Ended
Jul. 31, 2024
Share-Based Payment Arrangement [Abstract]  
Equity Plans and Stock-based Compensation Equity Plans and Stock-based Compensation
The following sets forth the total stock-based compensation expense for employee equity plans included in the Company’s condensed consolidated statements of operations:

Three Months Ended
July 31, 		Six Months Ended
July 31,
2024202320242023
(in thousands)
Cost of revenue$1,526 $1,938 $2,610 $2,933 
Research and development10,731 15,847 19,033 25,353 
Sales and marketing4,463 6,757 9,905 10,926 
General and administrative2,049 10,557 8,820 19,851 
Total stock-based compensation expense$18,769 $35,099 $40,368 $59,063 
As of July 31, 2024, the Company had unrecognized stock-based compensation expense related to stock options, RSUs and PRSUs (as defined below), and 2021 ESPP (as defined below) of $136.4 million, which is expected to be recognized over a weighted-average period of 2.2 years.
2021 Employee Stock Purchase Plan
The 2021 Employee Stock Purchase Plan (“2021 ESPP”) permits participants to purchase shares of the Company’s Common Stock at a discounted price through payroll deductions. As of July 31, 2024, 15,498,912 shares of Common Stock were available under the 2021 ESPP.
2021 Equity Incentive Plan
The 2021 Equity Incentive Plan (“2021 EIP”) allows the Company to grant stock options, stock appreciation rights, restricted stock units (“RSUs”), performance restricted stock units (“PRSUs”), and certain other awards. As of July 31, 2024, 37,590,709 shares of Common Stock were available under the 2021 EIP.
There were no options granted for the three and six months ended July 31, 2024.
Restricted Stock Units
A summary of RSUs outstanding under the 2021 EIP as of July 31, 2024 and changes during the fiscal year-to-date period then ended is presented in the following table:
 Number of SharesWeighted Average Grant Date Fair Value per Share
Outstanding as of January 31, 202428,416,127 $7.35 
RSU granted22,271,093 $1.51 
RSU vested(5,231,209)$7.09 
RSU forfeited(4,428,242)$9.77 
Outstanding as of July 31, 202441,027,769 $3.95 
Performance Restricted Stock Units
A summary of PRSUs outstanding under the 2021 EIP as of July 31, 2024 and changes during the fiscal year-to-date period then ended is presented in the following table:
 Number of SharesWeighted Average Grant Date Fair Value per Share
Outstanding as of January 31, 20243,147,782 $6.79 
PRSUs granted1,208,250 $1.26 
PRSU forfeited(1,170,008)$10.47 
Outstanding as of July 31, 20243,186,024 $3.34 
2017 Plan and 2007 Plan
In fiscal year 2022, the Company terminated its 2017 Stock Option Plan (the “2017 Plan”) and 2007 Stock Option Plan (the “2007 Plan”).
A summary of options outstanding under the 2017 Plan and 2007 Plan as of July 31, 2024 and changes during the fiscal year-to-date period then ended is presented in the following table:
 Number of Stock Option AwardsWeighted Average Exercise PriceWeighted Average Remaining Contractual term (in years)Aggregate Intrinsic Value (in thousands)
Outstanding as of January 31, 202411,396,756 $0.74 4.8$13,276 
Options exercised(2,629,090)$0.58 
Options cancelled(76,860)$0.74 
Outstanding as of July 31, 20248,690,806 $0.78 2.2$12,061 
Options vested and expected to vest as of July 31, 20248,690,806 $0.78 2.2$12,061 
Exercisable as of July 31, 20248,690,806 $0.78 2.2$12,061