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Cash and Cash Equivalents, Investments and Fair Value Measurements
3 Months Ended
Apr. 30, 2022
Fair Value Disclosures [Abstract]  
Cash and Cash Equivalents, Investments and Fair Value Measurements CASH AND CASH EQUIVALENTS, INVESTMENTS, AND FAIR VALUE MEASUREMENTS
The following table summarizes information about our cash and cash equivalents, and short-term investments by investment category (in thousands):
As of April 30, 2022
Fair Value LevelAmortized CostGross Unrealized GainsGross Unrealized LossesEstimated Fair Value
Cash and cash equivalents:
Cash$26,991 $— $— $26,991 
Money market fundsLevel 1592,161 — — 592,161 
Commercial paperLevel 274,969 — (9)74,960 
U.S. Treasury securitiesLevel 171,989 — — 71,989 
Total cash and cash equivalents$766,110 $— $(9)$766,101 
Short-term investments:
Certificates of depositLevel 2$357 $— $— $357 
Commercial paperLevel 2367,072 — (498)366,574 
Corporate notes and bondsLevel 247,333 — (200)47,133 
U.S. Treasury securitiesLevel 1435,879 (518)435,362 
U.S. agency securitiesLevel 22,005 — (13)1,992 
      Total short-term investments$852,646 $$(1,229)$851,418 
As of April 30, 2022, we determined that the declines in the market value of our investment portfolio were not driven by credit related factors. During the three months ended April 30, 2022 and 2021, we did not recognize any losses on our investments due to credit related factors. As of January 31, 2022, the aggregate fair value of our cash equivalents and short-term investments approximated amortized cost and, as such, there were no unrealized gains or losses, either individually or in the aggregate.
As of April 30, 2022 and January 31, 2022, our cash and cash equivalents had contractual maturities of three months or less and short-term investments had contractual maturities within one year of each respective date.
The following table summarizes the respective fair value and the classification by level within the fair value hierarchy (in thousands):
As of January 31, 2022
Level 1Level 2Level 3Total
Assets
Cash equivalents:
Money market funds$1,641,642 $— $— $1,641,642 
Short-term investments:
Certificates of deposit— 374 — 374 
Total assets measured and recorded at fair value$1,641,642 $374 $— $1,642,016 
There were no transfers between the levels of the fair value hierarchy during the three months ended April 30, 2022 and 2021.