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Cash Equivalents and Investments
 6 Months Ended
Jul. 31, 2023
Investments, Debt and Equity Securities [Abstract]  
Cash Equivalents and Investments Cash Equivalents and Investments
The following is a summary of the Company’s cash equivalents, short-term investments, and long-term investments on the condensed consolidated balance sheets (in thousands):

July 31, 2023
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
Fair Value
Cash equivalents:
Money market funds$409,604 $— $— $409,604 
Corporate notes and bonds22,228 — — 22,228 
U.S. government securities15,993 — (1)15,992 
Commercial paper10,904 — (3)10,901 
Total cash equivalents458,729 — (4)458,725 
Investments:
Corporate notes and bonds1,760,591 620 (15,566)1,745,645 
U.S. government and agency securities1,259,084 23 (13,868)1,245,239 
Commercial paper793,135 6 (1,076)792,065 
Certificates of deposit315,001 53 (314)314,740 
Total investments4,127,811 702 (30,824)4,097,689 
Total cash equivalents and investments$4,586,540 $702 $(30,828)$4,556,414 

January 31, 2023
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
Fair Value
Cash equivalents:
Money market funds(1)
$520,138 $— $— $520,138 
Commercial paper9,305 — (1)9,304 
Corporate notes and bonds6,902 1 — 6,903 
Certificates of deposit3,045 — (1)3,044 
Total cash equivalents(1)
539,390 1 (2)539,389 
Investments:
Corporate notes and bonds2,124,454 2,096 (23,470)2,103,080 
Commercial paper883,023 272 (1,947)881,348 
U.S. government and agency securities715,949 107 (12,220)703,836 
Certificates of deposit453,557 278 (1,110)452,725 
Total investments4,176,983 2,753 (38,747)4,140,989 
Total cash equivalents and investments(1)
$4,716,373 $2,754 $(38,749)$4,680,378 
________________
(1)Includes a reclassification of $141.0 million from cash to cash equivalents for the money market funds balance as of January 31, 2023, as presented in the Annual Report on Form 10-K filed with the SEC on March 29, 2023. Such reclassification did not impact the Company’s consolidated balance sheet as of January 31, 2023 or its consolidated statement of cash flows for the fiscal year ended January 31, 2023.

The Company included $26.3 million and $19.4 million of interest receivable in prepaid expenses and other current assets on the condensed consolidated balance sheets as of July 31, 2023 and January 31, 2023, respectively. The Company did not recognize an allowance for credit losses against interest receivable as of July 31, 2023 and January 31, 2023 because such potential losses were not material.
As of July 31, 2023, the contractual maturities of the Company’s available-for-sale marketable debt securities did not exceed 36 months. The estimated fair values of available-for-sale marketable debt securities, by remaining contractual maturity, are as follows (in thousands):

July 31, 2023
Estimated
Fair Value
Due within 1 year$3,046,062 
Due in 1 year to 3 years1,100,748 
Total$4,146,810 

The following tables show the fair values of, and the gross unrealized losses on, the Company’s available-for-sale marketable debt securities, classified by the length of time that the securities have been in a continuous unrealized loss position and aggregated by investment type, on the condensed consolidated balance sheets (in thousands):

July 31, 2023
Less than 12 Months12 Months or GreaterTotal
Fair ValueGross
Unrealized
Losses		Fair ValueGross
Unrealized
Losses		Fair ValueGross
Unrealized
Losses
Cash equivalents:
Commercial paper$10,901 $(3)$— $— $10,901 $(3)
U.S. government securities5,992 (1)— — 5,992 (1)
Total cash equivalents16,893 (4)— — 16,893 (4)
Investments:
Corporate notes and bonds979,478 (6,794)564,056 (8,772)1,543,534 (15,566)
U.S. government and agency securities894,573 (6,556)253,934 (7,312)1,148,507 (13,868)
Commercial paper756,598 (1,076)— — 756,598 (1,076)
Certificates of deposit215,833 (314)— — 215,833 (314)
Total investments2,846,482 (14,740)817,990 (16,084)3,664,472 (30,824)
Total cash equivalents and investments$2,863,375 $(14,744)$817,990 $(16,084)$3,681,365 $(30,828)
January 31, 2023
Less than 12 Months12 Months or GreaterTotal
Fair ValueGross
Unrealized
Losses		Fair ValueGross
Unrealized
Losses		Fair ValueGross
Unrealized
Losses
Cash equivalents:
Commercial paper$9,304 $(1)$— $— $9,304 $(1)
Certificates of deposit3,044 (1)— — 3,044 (1)
Total cash equivalents12,348 (2)— — 12,348 (2)
Investments:
Corporate notes and bonds899,655 (8,521)736,431 (14,949)1,636,086 (23,470)
U.S. government and agency securities387,207 (3,157)232,771 (9,063)619,978 (12,220)
Commercial paper561,793 (1,947)— — 561,793 (1,947)
Certificates of deposit256,428 (1,110)— — 256,428 (1,110)
Total investments2,105,083 (14,735)969,202 (24,012)3,074,285 (38,747)
Total cash equivalents and investments$2,117,431 $(14,737)$969,202 $(24,012)$3,086,633 $(38,749)

For available-for-sale marketable debt securities with unrealized loss positions, the Company does not intend to sell these securities and it is more likely than not that the Company will hold these securities until maturity or a recovery of the cost basis. The decline in fair value of these securities due to credit related factors was not material as of July 31, 2023 and January 31, 2023.

See Note 5, “Fair Value Measurements,” for information regarding the Company’s strategic investments.