| Amortized Cost, Gross Unrealized Gains (Losses) and Fair Value of Available-For-Sale Securities |
The amortized cost, gross unrealized gains (losses) and fair value of available-for-sale securities by major security type and class of security as of July 31, 2026, January 31, 2026 and July 31, 2025 were as follows:
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Amortized |
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Unrealized |
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Unrealized |
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Fair |
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Cost |
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Gains |
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(Losses) |
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Value |
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As of July 31, 2026 |
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Short-term Investments: |
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Corporate bonds |
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$ |
80,956 |
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|
$ |
52 |
|
|
$ |
(101 |
) |
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$ |
80,907 |
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US Treasury securities |
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|
17,486 |
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|
41 |
|
|
|
— |
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|
17,527 |
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Federal government agencies |
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|
2,246 |
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|
— |
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(5 |
) |
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|
2,241 |
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Commercial paper |
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8,859 |
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— |
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— |
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|
8,859 |
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Municipal and pre-refunded municipal bonds |
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|
7,594 |
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|
1 |
|
|
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(7 |
) |
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|
7,588 |
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Certificates of deposit |
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|
249 |
|
|
|
— |
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— |
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|
249 |
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117,390 |
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|
94 |
|
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(113 |
) |
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|
117,371 |
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Long-term Investments: |
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Corporate bonds |
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|
133,820 |
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|
|
26 |
|
|
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(1,246 |
) |
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|
132,600 |
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US Treasury securities |
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|
51,572 |
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|
|
23 |
|
|
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(413 |
) |
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|
51,182 |
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Mutual funds, held in rabbi trust |
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|
24,680 |
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|
20 |
|
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(247 |
) |
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|
24,453 |
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Federal government agencies |
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|
20,298 |
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|
|
— |
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(244 |
) |
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|
20,054 |
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Municipal and pre-refunded municipal bonds |
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|
875 |
|
|
|
— |
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|
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(6 |
) |
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|
869 |
|
Certificates of deposit |
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|
249 |
|
|
|
— |
|
|
|
— |
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|
|
249 |
|
|
|
|
231,494 |
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|
69 |
|
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(2,156 |
) |
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|
229,407 |
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|
$ |
348,884 |
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|
$ |
163 |
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|
$ |
(2,269 |
) |
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$ |
346,778 |
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Amortized |
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Unrealized |
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Unrealized |
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Fair |
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Cost |
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Gains |
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(Losses) |
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Value |
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As of January 31, 2026 |
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Short-term Investments: |
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Corporate bonds |
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$ |
232,594 |
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|
$ |
403 |
|
|
$ |
(28 |
) |
|
$ |
232,969 |
|
US Treasury securities |
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|
38,288 |
|
|
|
174 |
|
|
|
(2 |
) |
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|
38,460 |
|
Federal government agencies |
|
|
17,454 |
|
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|
32 |
|
|
|
(2 |
) |
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|
17,484 |
|
Commercial paper |
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|
8,824 |
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|
|
— |
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— |
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|
|
8,824 |
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Municipal and pre-refunded municipal bonds |
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|
27,964 |
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26 |
|
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(3 |
) |
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|
27,987 |
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Certificates of deposit |
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|
1,000 |
|
|
|
— |
|
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|
— |
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|
1,000 |
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|
326,124 |
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|
635 |
|
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(35 |
) |
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|
326,724 |
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Long-term Investments: |
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|
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Corporate bonds |
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|
330,319 |
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|
921 |
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(436 |
) |
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|
330,804 |
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US Treasury securities |
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|
80,872 |
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|
|
520 |
|
|
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(20 |
) |
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|
81,372 |
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Mutual funds, held in rabbi trust |
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|
22,213 |
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|
383 |
|
|
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(1 |
) |
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|
22,595 |
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Federal government agencies |
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|
23,723 |
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10 |
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(55 |
) |
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|
23,678 |
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Municipal and pre-refunded municipal bonds |
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|
3,393 |
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17 |
|
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(1 |
) |
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|
3,409 |
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|
460,520 |
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|
1,851 |
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(513 |
) |
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|
461,858 |
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$ |
786,644 |
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|
$ |
2,486 |
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|
$ |
(548 |
) |
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$ |
788,582 |
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Amortized |
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Unrealized |
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Unrealized |
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Fair |
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Cost |
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Gains |
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(Losses) |
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Value |
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As of July 31, 2025 |
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Short-term Investments: |
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|
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|
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Corporate bonds |
|
$ |
190,228 |
|
|
$ |
59 |
|
|
$ |
(244 |
) |
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$ |
190,043 |
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US Treasury securities |
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|
12,724 |
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19 |
|
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(2 |
) |
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|
12,741 |
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Federal government agencies |
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|
30,609 |
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11 |
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(7 |
) |
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|
30,613 |
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Commercial paper |
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|
7,928 |
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|
— |
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— |
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|
7,928 |
|
Municipal and pre-refunded municipal bonds |
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|
48,111 |
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12 |
|
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(33 |
) |
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|
48,090 |
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Certificates of deposit |
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|
1,249 |
|
|
|
— |
|
|
|
— |
|
|
|
1,249 |
|
|
|
|
290,849 |
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|
101 |
|
|
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(286 |
) |
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|
290,664 |
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Long-term Investments: |
|
|
|
|
|
|
|
|
|
|
|
|
Corporate bonds |
|
|
216,635 |
|
|
|
469 |
|
|
|
(336 |
) |
|
|
216,768 |
|
US Treasury securities |
|
|
84,454 |
|
|
|
351 |
|
|
|
(26 |
) |
|
|
84,779 |
|
Mutual funds, held in rabbi trust |
|
|
20,115 |
|
|
|
297 |
|
|
|
(36 |
) |
|
|
20,376 |
|
Federal government agencies |
|
|
39,635 |
|
|
|
3 |
|
|
|
(172 |
) |
|
|
39,466 |
|
Municipal and pre-refunded municipal bonds |
|
|
4,940 |
|
|
|
10 |
|
|
|
(3 |
) |
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|
4,947 |
|
|
|
|
365,779 |
|
|
|
1,130 |
|
|
|
(573 |
) |
|
|
366,336 |
|
|
|
$ |
656,628 |
|
|
$ |
1,231 |
|
|
$ |
(859 |
) |
|
$ |
657,000 |
|
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