Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities

v3.23.2
Marketable Securities
6 Months Ended
Jul. 31, 2023
Investments, Debt and Equity Securities [Abstract]  
Marketable Securities Marketable Securities
The following is a summary of available-for-sale marketable securities, excluding those securities classified within cash and cash equivalents on the condensed consolidated balance sheets:
July 31, 2023
(in thousands) Amortized Cost Unrealized Gains Unrealized Losses Fair value
Corporate bonds $ 77,529  $ $ (90) $ 77,441 
Municipal bonds 7,644  —  (10) 7,634 
U.S. government and agency securities 162,564  18  (232) 162,350 
Certificates of deposit 56,016  (57) 55,961 
Commercial paper 177,605  16  (282) 177,339 
Marketable securities $ 481,358  $ 38  $ (671) $ 480,725 
January 31, 2023
(in thousands) Amortized Cost Unrealized Gains Unrealized Losses Fair value
Corporate bonds $ 39,922  $ $ (68) $ 39,862 
Municipal bonds 12,429  22  —  12,451 
U.S. government and agency securities 128,898  (367) 128,537 
Certificates of deposit 59,546  28  (155) 59,419 
Commercial paper 150,131  41  (202) 149,970 
Marketable securities $ 390,926  $ 105  $ (792) $ 390,239 
As of July 31, 2023 and January 31, 2023, the maturities of available-for-sale marketable securities did not exceed 12 months. Interest income from cash and cash equivalents and marketable securities was $7.9 million and $13.9 million for the three and six months ended July 31, 2023, respectively, and $1.2 million and $1.6 million for the three and six months ended July 31, 2022, respectively.
The estimated fair value of debt securities in an unrealized loss position for which an allowance for credit losses has not been recorded, was $422.8 million and $220.9 million as of July 31, 2023 and January 31, 2023, respectively. There are no expected credit losses that have been recorded against the Company’s investment securities as of July 31, 2023 and January 31, 2023.
Unrealized losses on the Company’s debt securities are not considered to be credit-related based upon an analysis that considered the extent to which the fair value is less than the amortized basis of a security, adverse conditions specifically related to the security, changes to credit rating of the instrument subsequent to Company purchase, and the strength of the underlying collateral, if any.
Refer to Note 5, Fair Value Measurements, for information about the fair value of the Company’s fair value hierarchy for short-term marketable securities.