The 2023 Notes are senior, unsecured obligations of the Company, and bear interest at a fixed rate of 0.25% per year. Interest is payable in cash semi-annually in arrears on February 15 and August 15 of each year, beginning on August 15, 2018. The 2023 Notes mature on February 15, 2023 unless earlier repurchased or converted. The Company may not redeem the 2023 Notes prior to maturity. The total net proceeds from the 2023 Notes, after deducting initial purchasers’ discounts and debt issuance costs, was $335.0 million.

In September 2019, the Company used part of the net proceeds from the issuance of the 2025 Notes for the 2023 Notes Partial Repurchase, which consisted of a repurchase of $224.4 million aggregate principal amount of the 2023 Notes in privately-negotiated transactions for aggregate consideration of $604.8 million, consisting of approximately $224.4 million in cash and approximately 3.0 million shares of Class A common stock. Of the $604.8 million in aggregate consideration, $197.7 million and $407.1 million were allocated to the debt and equity components, respectively, using an effective interest rate of 4.00% to determine the fair value of the liability component. This interest rate was based on the income and market based approaches used to determine the effective interest rate of the 2025 Notes, adjusted for the remaining tenor of the 2023 Notes. As of the repurchase date, the carrying value of the notes subject to the 2023 Notes Partial Repurchase, net of unamortized debt discount and issuance costs, was $183.1 million. The 2023 Notes Partial Repurchase resulted in a $14.6 million loss on early debt extinguishment, of which $3.8 million consisted of unamortized debt issuance costs. As of January 31, 2020, $120.6 million of principal remained outstanding on the 2023 Notes.

The terms of the 2023 Notes are governed by an Indenture by and between the Company and Wilmington Trust, National Association, as Trustee (the Indenture). Upon conversion, the 2023 Notes may be settled in cash, shares of Class A common stock or a combination of cash and shares of Class A common stock, at the Company’s election.

The 2023 Notes are convertible at an initial conversion rate of 20.6795 shares of Class A common stock per $1,000 principal amount of the 2023 Notes, which is equal to an initial conversion price of approximately $48.36 per share of Class A common stock, subject to adjustment under certain circumstances in accordance with the terms of the Indenture. Prior to the close of business on the business day immediately preceding October 15, 2022, holders of the 2023 Notes may convert all or a portion of their 2023 Notes only in multiples of $1,000 principal amount, under the following circumstances:

On or after October 15, 2022 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or any portion of their 2023 Notes regardless of the foregoing circumstances. For at least twenty trading days during the period of thirty consecutive trading days ended January 31, 2020, the last reported sale price of the Company’s common stock was equal to or exceeded 130% of the conversion price of the 2023 Notes on each applicable trading day. As a result, the 2023 Notes are convertible at the option of the holders during the fiscal quarter ending April 30, 2020 and were classified as current liabilities on the consolidated balance sheet as of January 31, 2020. In addition, as of the date of this filing, the Company has received an immaterial amount of conversion requests and holders of the 2023 Notes have converted an immaterial amount of such notes (which was not in connection with the 2023 Notes Partial Repurchase).

Holders of the 2023 Notes who convert their 2023 Notes in connection with certain corporate events that constitute a make-whole fundamental change (as defined in the Indenture) are, under certain circumstances, entitled to an increase in the conversion rate. Additionally, in the event of a corporate event that constitutes a fundamental change (as defined in the Indenture), holders of the 2023 Notes may require the Company to repurchase all or a portion of their 2023 Notes at a price equal to 100% of the principal amount of the 2023 Notes being repurchased, plus any accrued and unpaid interest.

In accounting for the issuance of the 2023 Notes, the Company separated the 2023 Notes into liability and equity components, utilizing an effective interest rate of 5.68% to determine the fair value of the liability component. This interest rate was based on both an income and a market based approach. For the income approach, the Company used a convertible bond pricing model, which included several assumptions including volatility and the risk-free rate. For the market approach, the Company observed the price of the Note Hedge (see below) it purchased for its 2023 Notes and also performed an evaluation of issuances of convertible debt securities by other companies with similar credit risk ratings at the time of issuance. The following table sets forth total interest expense recognized related to the 2023 Notes (in thousands):

Total issuance costs of $10.0 million related to the 2023 Notes were allocated between liability and equity in the same proportion as the allocation of the total proceeds to the liability and equity components. Issuance costs attributable to the liability component are being amortized to interest expense over the respective term of the 2023 Notes using the effective interest rate method. The issuance costs attributable to the equity component were netted against the respective equity component in Additional paid-in capital. The Company recorded liability issuance costs of $7.7 million and equity issuance costs of $2.3 million.



	As of January 31, 2020
Liability component:
Principal	$	120,588
Less: unamortized debt issuance costs and debt discount	(19,885		)
Net carrying amount	$	100,703

Equity component:
2023 Notes	$	27,949
Less: issuance costs	(811		)
Carrying amount of the equity component⁽¹⁾	$	27,138

In connection with the pricing of the 2023 Notes, the Company entered into convertible note hedge transactions with respect to its Class A common stock (Note Hedges). The Note Hedges are purchased call options that give the Company the option to purchase, subject to anti-dilution adjustments substantially identical to those in the 2023 Notes, approximately 7.1 million shares of its Class A common stock for approximately $48.36 per share (subject to adjustment), corresponding to the approximate initial conversion price of the 2023 Notes, exercisable upon conversion of the 2023 Notes. The Note Hedges will expire in 2023, if not exercised earlier. The Note Hedges are intended to offset potential dilution to the Company’s Class A common stock and/or offset the potential cash payments that the Company could be required to make in excess of the principal amount upon any conversion of the 2023 Notes under certain circumstances. The Note Hedges are separate transactions and are not part of the terms of the 2023 Notes.

In September 2019, and in connection with the 2023 Notes Partial Repurchase, the Company terminated Note Hedges corresponding to approximately 4.6 million shares for cash proceeds of $405.9 million. The proceeds were recorded as an increase to Additional paid-in capital in the consolidated balance sheets. As of January 31, 2020, Note Hedges giving the Company the option to purchase approximately 2.5 million shares (subject to adjustment) remained outstanding.

In connection with the issuance of the 2023 Notes, the Company also entered into separate warrant transactions pursuant to which it sold net-share-settled (or, at the Company’s election subject to certain conditions, cash-settled) warrants to acquire, subject to anti-dilution adjustments, up to approximately 7.1 million shares over 80 scheduled trading days beginning in May 2023 of the Company’s Class A common stock at an initial exercise price of approximately $68.06 per share (subject to adjustment). If the Warrants are not exercised on their exercise dates, they will expire. If the market value per share of the Company’s Class A common stock exceeds the applicable exercise price of the Warrants, the Warrants could have a dilutive effect on the Company’s Class A common stock unless, subject to the terms of the Warrants, the Company elects to cash settle the Warrants. The Warrants are separate transactions and are not part of the terms of the 2023 Notes or the Note Hedges.

The Company received aggregate proceeds of $52.4 million from the sale of the Warrants in connection with the 2023 Notes. The proceeds from the sale of the Warrants were recorded as an increase to Additional paid-in capital in the consolidated balance sheets.

In September 2019, and in connection with the 2023 Notes Partial Repurchase, the Company terminated Warrants corresponding to approximately 4.6 million shares for total cash payments of $358.6 million. The termination payment was recorded as a decrease to Additional paid-in capital in the consolidated balance sheets. As of January 31, 2020, Warrants to acquire up to approximately 2.5 million shares (subject to adjustment) remained outstanding.

The 2025 Notes are senior, unsecured obligations of the Company, and bear interest at a fixed rate of 0.125% per year. Interest is payable in cash semi-annually in arrears on March 1 and September 1 of each year, beginning on March 1, 2020. The 2025 Notes mature on September 1, 2025 unless earlier redeemed, repurchased or converted. The total net proceeds from the 2025 Notes, after deducting initial purchasers’ discounts and debt issuance costs, were $1,040.7 million.

The terms of the 2025 Notes are governed by an Indenture by and between the Company and Wilmington Trust, National Association, as Trustee (the Indenture). Upon conversion, the 2025 Notes may be settled in cash, shares of Class A common stock or a combination of cash and shares of Class A common stock, at the Company’s election.

The 2025 Notes are convertible at an initial conversion rate of 5.2991 shares of class A common stock per $1,000 principal amount of the 2025 Notes, which is equal to an initial conversion price of approximately $188.71 per share of Class A common stock, subject to adjustment under certain circumstances in accordance with the terms of the Indenture. Prior to the close of business on the business day immediately preceding June 1, 2025, holders of the 2025 Notes may convert all or a portion of their 2025 Notes only in multiples of $1,000 principal amount, under the following circumstances:

On or after June 1, 2025 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or any portion of their 2025 Notes regardless of the foregoing circumstances. During the year ended January 31, 2020, the conditions allowing holders of the 2025 Notes to convert were not met.

The Company may redeem for cash all or any portion of the 2025 Notes, at its option, on or after September 6, 2022, if the last reported sale price of the Company’s Class A common stock has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period (including the last trading day of such period) ending on and including the trading day preceding the date on which the Company provides notice of redemption at a redemption price equal to 100% of the principal amount of the 2025 Notes to be redeemed, plus any accrued and unpaid interest to, but excluding, the redemption date. During the year ended January 31, 2020, the Company had not redeemed any of the 2025 Notes.

Holders of the 2025 Notes who convert their 2025 Notes in connection with certain corporate events that constitute a make-whole fundamental change (as defined in the Indenture) or in connection with the Company’s issuance of a redemption notice are, under certain circumstances, entitled to an increase in the conversion rate. Additionally, in the event of a corporate event that constitutes a fundamental change (as defined in the Indenture), holders of the 2025 Notes may require the Company to repurchase all or a portion of their 2025 Notes at a price equal to 100% of the principal amount of the 2025 Notes being repurchased, plus any accrued and unpaid interest.

In accounting for the issuance of the 2025 Notes, the Company separated the 2025 Notes into liability and equity components utilizing an effective interest rate of 4.10% to determine the fair value of the liability component. This interest rate was based on both an income and a market based approach. For the income approach, the Company used a convertible bond pricing model, which included several assumptions including volatility and the risk-free rate. For the market approach, the Company performed an evaluation of issuances of convertible debt securities by other companies with similar credit risk ratings at the time of issuance. The following table sets forth total interest expense recognized related to the 2025 Notes (in thousands):

Total issuance costs of $19.3 million related to the 2025 Notes were allocated between liability and equity in the same proportion as the allocation of the total proceeds to the liability and equity components. Issuance costs attributable to the liability component are being amortized to interest expense over the respective term of the 2025 Notes using the effective interest rate method. The issuance costs attributable to the equity component were netted against the respective equity component in Additional paid-in capital. The Company recorded liability issuance costs of $15.3 million and equity issuance costs of $4.0 million.



	As of January 31, 2020
Liability component:
Principal	$	1,060,000
Less: unamortized debt issuance costs and debt discount	(222,998		)
Net carrying amount	$	837,002

Equity component:
2025 Notes	$	221,387
Less: issuance costs	(4,040		)
Carrying amount of the equity component⁽¹⁾	$	217,347

In connection with the pricing of the 2025 Notes, the Company entered into capped call transactions with respect to its Class A common stock (Capped Calls). The Capped Calls are purchased call options that give the Company the option to purchase, subject to anti-dilution adjustments substantially identical to those in the 2025 Notes, approximately 5.6 million shares of its Class A common stock for approximately $188.71 per share (subject to adjustment), corresponding to the approximate initial conversion price of the 2025 Notes, exercisable upon conversion of the 2025 Notes. The Capped Calls have initial cap prices of $255.88 per share (subject to adjustment) and will expire in 2025, if not exercised earlier. The Capped Calls are intended to offset potential dilution to the Company’s Class A common stock and/or offset the potential cash payments that the Company could be required to make in excess of the principal amount upon any conversion of the 2025 Notes under certain circumstances. The Capped Calls are separate transactions and are not part of the terms of the 2025 Notes.