v3.26.1
Marketable Securities (Tables)
 6 Months Ended
Jul. 31, 2026
Investments, Debt and Equity Securities [Abstract]  
Schedule of Marketable Securities
The following is a summary of our marketable securities (in thousands): 
As of July 31, 2026
Amortized CostGross Unrealized GainsGross Unrealized LossesEstimated Fair Value
Treasury bills and U.S. government securities(1)
$580,721 $— $(1,318)$579,403 
Corporate bonds191,223 — (446)190,777 
Commercial paper(2)
24,517 1 — 24,518 
Yankee bonds2,919 — (6)2,913 
Total marketable securities$799,380 $1 $(1,770)$797,611 
(1) Additional treasury bills with both amortized cost and estimated fair value of $29.9 million are included in cash and cash equivalents due to their original maturities of three months or less.
(2) Additional commercial paper with both amortized cost and estimated fair value of $10.0 million is included in cash and cash equivalents due to its original maturities of three months or less.
As of January 31, 2026
Amortized CostGross Unrealized GainsGross Unrealized LossesEstimated Fair Value
Treasury bills and U.S. government securities(1)
$619,831 $324 $— $620,155 
Corporate bonds160,872 5 — 160,877 
Commercial paper34,373 17 — 34,390 
Yankee bonds2,899 — (2)2,897 
Total marketable securities$817,975 $346 $(2)$818,319 
(1) Additional treasury bills with both amortized cost and estimated fair value of $22.0 million are included in cash and cash equivalents due to their original maturities of three months or less.