XML 29 R22.htm IDEA: XBRL DOCUMENT v3.25.3
Marketable Securities (Tables)
 9 Months Ended
Oct. 31, 2025
Investments, Debt and Equity Securities [Abstract]  
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 October 31, 2025, January 31, 2025 and October 31, 2024 were as follows:

 

 

 

Amortized

 

 

Unrealized

 

 

Unrealized

 

 

Fair

 

 

 

Cost

 

 

Gains

 

 

(Losses)

 

 

Value

 

As of October 31, 2025

 

 

 

 

 

 

 

 

 

 

 

 

Short-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

233,479

 

 

$

386

 

 

$

(36

)

 

$

233,829

 

US Treasury securities

 

 

18,768

 

 

 

81

 

 

 

(0

)

 

 

18,849

 

Federal government agencies

 

 

14,735

 

 

 

31

 

 

 

(2

)

 

 

14,764

 

Municipal and pre-refunded municipal bonds

 

 

33,658

 

 

 

38

 

 

 

(1

)

 

 

33,695

 

Commercial paper

 

 

2,996

 

 

 

—

 

 

 

—

 

 

 

2,996

 

Certificates of deposit

 

 

1,000

 

 

 

—

 

 

 

—

 

 

 

1,000

 

 

 

304,636

 

 

 

536

 

 

 

(39

)

 

 

305,133

 

Long-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

 

219,737

 

 

 

980

 

 

 

(172

)

 

 

220,545

 

US Treasury securities

 

 

75,430

 

 

 

661

 

 

 

—

 

 

 

76,091

 

Federal government agencies

 

 

29,602

 

 

 

15

 

 

 

(51

)

 

 

29,566

 

Municipal and pre-refunded municipal bonds

 

 

3,591

 

 

 

19

 

 

 

(3

)

 

 

3,607

 

Mutual funds, held in rabbi trust

 

 

21,752

 

 

 

291

 

 

 

(9

)

 

 

22,034

 

 

 

350,112

 

 

 

1,966

 

 

 

(235

)

 

 

351,843

 

 

$

654,748

 

 

$

2,502

 

 

$

(274

)

 

$

656,976

 

 

 

 

 

Amortized

 

 

Unrealized

 

 

Unrealized

 

 

Fair

 

 

 

Cost

 

 

Gains

 

 

(Losses)

 

 

Value

 

As of January 31, 2025

 

 

 

 

 

 

 

 

 

 

 

 

Short-term Investments:

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

186,732

 

 

$

103

 

 

$

(114

)

 

$

186,721

 

US Treasury securities

 

 

5,415

 

 

 

—

 

 

 

(5

)

 

 

5,410

 

Federal government agencies

 

 

53,663

 

 

 

55

 

 

 

(7

)

 

 

53,711

 

Municipal and pre-refunded municipal bonds

 

 

53,772

 

 

 

70

 

 

 

(8

)

 

 

53,834

 

Commercial paper

 

 

9,774

 

 

 

—

 

 

 

—

 

 

 

9,774

 

Certificates of deposit

 

 

10,499

 

 

 

—

 

 

 

—

 

 

 

10,499

 

 

 

319,855

 

 

 

228

 

 

 

(134

)

 

 

319,949

 

Long-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

 

233,418

 

 

 

298

 

 

 

(500

)

 

 

233,216

 

US Treasury securities

 

 

92,852

 

 

 

226

 

 

 

(90

)

 

 

92,988

 

Federal government agencies

 

 

50,579

 

 

 

16

 

 

 

(292

)

 

 

50,303

 

Municipal and pre-refunded municipal bonds

 

 

14,770

 

 

 

35

 

 

 

(8

)

 

 

14,797

 

Mutual funds, held in rabbi trust

 

 

15,673

 

 

 

2,246

 

 

 

(15

)

 

 

17,904

 

Certificates of deposit

 

 

1,000

 

 

 

—

 

 

 

—

 

 

 

1,000

 

 

 

408,292

 

 

 

2,821

 

 

 

(905

)

 

 

410,208

 

 

$

728,147

 

 

$

3,049

 

 

$

(1,039

)

 

$

730,157

 

 

 

 

Amortized

 

 

Unrealized

 

 

Unrealized

 

 

Fair

 

 

 

Cost

 

 

Gains

 

 

(Losses)

 

 

Value

 

As of October 31, 2024

 

 

 

 

 

 

 

 

 

 

 

 

Short-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

178,736

 

 

$

151

 

 

$

(187

)

 

$

178,700

 

US Treasury securities

 

 

1,491

 

 

 

—

 

 

 

(3

)

 

 

1,488

 

Federal government agencies

 

 

72,598

 

 

 

71

 

 

 

(20

)

 

 

72,649

 

Municipal and pre-refunded municipal bonds

 

 

64,129

 

 

 

70

 

 

 

(33

)

 

 

64,166

 

Commercial paper

 

 

2,943

 

 

 

—

 

 

 

—

 

 

 

2,943

 

Certificates of deposit

 

 

20,499

 

 

 

—

 

 

 

—

 

 

 

20,499

 

 

 

340,396

 

 

 

292

 

 

 

(243

)

 

 

340,445

 

Long-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

 

110,302

 

 

 

266

 

 

 

(398

)

 

 

110,170

 

US Treasury securities

 

 

59,507

 

 

 

197

 

 

 

(51

)

 

 

59,653

 

Federal government agencies

 

 

35,098

 

 

 

16

 

 

 

(285

)

 

 

34,829

 

Municipal and pre-refunded municipal bonds

 

 

16,778

 

 

 

30

 

 

 

(12

)

 

 

16,796

 

Mutual funds, held in rabbi trust

 

 

15,756

 

 

 

2,035

 

 

 

(2

)

 

 

17,789

 

Certificates of deposit

 

 

1,000

 

 

 

—

 

 

 

—

 

 

 

1,000

 

 

 

238,441

 

 

 

2,544

 

 

 

(748

)

 

 

240,237

 

 

$

578,837

 

 

$

2,836

 

 

$

(991

)

 

$

580,682