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Debt
 12 Months Ended
Jan. 31, 2025
Debt Disclosure [Abstract]  
Debt Debt
Convertible Senior Notes

In September 2018, we issued $575.0 million in aggregate principal amount of the 0.5% Convertible Senior Notes due in 2023, which included the initial purchasers’ exercise in full of their option to purchase an additional $75.0 million aggregate principal amount of the 2023 Notes. The net proceeds from the issuance of the 2023 Notes were $560.8 million after deducting the initial purchasers’ discounts and transaction costs.

In January 2021, we issued $690.0 million in aggregate principal amount of the 0% Convertible Senior Notes due in 2024, which included the initial purchasers’ exercise in full of their option to purchase an additional $90.0 million aggregate principal amount of the 2024 Notes. The net proceeds from the issuance of the 2024 Notes were $677.3 million after deducting the initial purchasers’ discounts and transaction costs.

When outstanding, the Notes were senior unsecured obligations and ranked senior in right of payment to any of our indebtedness that was expressly subordinated in right of payment to the Notes; equal in right of payment to any of our unsecured indebtedness then existing and future liabilities that are not so subordinated; effectively junior in right of payment to any of our secured indebtedness, to the extent of the value of the assets securing such indebtedness; and structurally junior to all indebtedness and other liabilities (including trade payables) of our subsidiaries.

The 2023 Notes were governed by an indenture dated September 18, 2018 (the “2018 Indenture”). The 2024 Notes were governed by an indenture dated January 15, 2021 (the “2021 Indenture,” and together with the 2018 Indenture, the “Indentures”). The Indentures were between us, as the issuer, and U.S. Bank National Association, as trustee. The Indentures did not contain any financial covenants or restrictions on the payments of dividends, the incurrence of indebtedness, or the issuance or repurchase of securities by us or any of our subsidiaries. The 2023 Notes matured on September 15, 2023. Interest on the 2023 Notes was payable semi-annually in arrears on March 15 and September 15 of each year. The Notes were subject to additional interest in certain events of default. The 2024 Notes matured on January 15, 2024.

Extinguishment of the 2023 Notes and 2024 Notes

We repaid in cash $37.1 million and $689.9 million in aggregate principal amount of the 2023 Notes and 2024 Notes respectively during the year ended January 31, 2024.
The effective interest rate on the 2023 Notes was 5.9%. The effective interest rate on the 2024 Notes was 3.8%. Interest expense recognized related to the Notes was as follows:
Year Ended January 31,
(in thousands)202520242023
Contractual interest expense$— $425 $185 
Amortization of transaction costs— 4,197 4,415 
Total$— $4,622 $4,600 
Capped Calls

To minimize the potential economic dilution to our common stock upon conversion of the Notes, we entered into privately-negotiated capped call transactions ("Capped Calls") with certain counterparties. In the first quarter of fiscal 2024, we unwound $23.7 million of the Capped Calls in relation to our 2023 Notes and received cash from the counterparties. All remaining Capped Calls associated with the 2023 Notes and 2024 Notes expired during the year ended January 31, 2024.

Impact on Net Income (Loss) Per Share

In periods when we have net income, the shares of our common stock subject to the Notes outstanding during the period are included in our diluted earnings per share under the if-converted method.

Capped Calls are excluded from the calculation of diluted earnings per share, as they would be antidilutive. However, upon conversion, there will be no economic dilution from the Notes unless the market price of our common stock exceeds the initial $110.00 per share cap price associated with the 2023 Notes and $525.30 per share cap price associated with the 2024 Notes, as exercise of the Capped Calls offsets any dilution from the Notes from the conversion price up to the cap price.

As of January 31, 2024 and 2023, the market price of our common stock did not exceed the $110.00 per share cap price associated with the 2023 Notes or the $525.30 cap price associated with the 2024 Notes. Therefore, the Notes would not have caused economic dilution if converted as of January 31, 2024 and 2023.

Revolving Credit Facility

In January 2021, we entered into a credit agreement, as subsequently amended in May 2023, with a syndicate of banks. The credit agreement extended a senior secured revolving credit facility to us in an aggregate principal amount of $500.0 million, which amount may be increased by an additional $250.0 million subject to the terms of the credit agreement. We may use the proceeds of future borrowings under the credit facility to finance working capital, capital expenditures and for other general corporate purposes, including permitted acquisitions.

The facility matures in January 2026 and requires us to comply with customary affirmative and negative covenants. We were in compliance with all covenants as of January 31, 2025. As of January 31, 2025, there were no outstanding borrowings under the revolving credit facility. The facility is subject to customary fees for loan facilities of this type, including ongoing commitment fees at a rate between 0.25% and 0.30% per annum on the daily undrawn balance.