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Convertible Senior Notes
 9 Months Ended
Sep. 30, 2022
Debt Disclosure [Abstract]  
Convertible Senior Notes
Note 5. Convertible Senior Notes
In March 2018, the Company issued $460.0 million aggregate principal amount of 0% convertible senior notes due 2023 in a private placement, including the exercise in full of the over-allotment options of the initial purchasers (the "2023 Notes"). The 2023 Notes would have matured on March 15, 2023, unless repurchased or redeemed earlier by the Company or converted pursuant to their terms. The total net proceeds from the debt offering, after deducting initial purchase discounts and debt issuance costs, were approximately $449.5 million. In the second quarter of 2021, the Company redeemed the remaining outstanding principal balance of its 2023 Notes.
In March 2020, the Company issued $1.0 billion aggregate principal amount of 0% convertible senior notes due 2025 in a private placement to qualified institutional buyers (the "2025 Notes"). The 2025 Notes will mature on March 1, 2025, unless earlier repurchased or redeemed by the Company or converted pursuant to their terms. The total net proceeds from the debt offering, after deducting initial purchase discounts and debt issuance costs, were approximately $986.5 million.
In September 2020, the Company issued $650.0 million aggregate principal amount of 0% convertible senior notes due 2026 in a private placement to qualified institutional buyers (the "2026 Notes"). The 2026 Notes will mature on March 15, 2026, unless earlier repurchased or redeemed by the Company or converted pursuant to their terms. The total net proceeds from the debt offering, after deducting initial purchase discounts and debt issuance costs, were approximately $640.2 million.
The 2023 Notes, 2025 Notes and 2026 Notes (collectively, the “Notes”) are senior, unsecured obligations of the Company that do not bear regular interest, and the principal amount of the Notes do not accrete. The Notes may bear special interest under specified circumstances relating to the Company's failure to comply with its reporting obligations under the indentures governing each of the Notes (collectively, the "Notes Indentures") or if the Notes are not freely tradeable as required by each respective Notes Indenture.
Other Terms of the Notes
2025 Notes2026 Notes
$1,000 principal amount initially convertible into number of the Company’s Class A Common Stock, par value $0.0001
2.7745 shares
2.3583 shares
Equivalent initial approximate conversion price per share
$360.43 $424.03 
The conversion rate is subject to adjustment upon the occurrence of certain specified events but will not be adjusted for any accrued and unpaid special interest. In addition, upon the occurrence of a make-whole fundamental change or a redemption period, each as defined in the respective Notes Indentures, the Company will, in certain circumstances, increase the conversion rate by a number of additional shares for a holder that elects to convert its Notes in connection with such make-whole fundamental change or during the relevant redemption period.
The Notes will be convertible at certain times and upon the occurrence of certain events in the future. Further, on or after December 1, 2024 for the 2025 Notes, and December 15, 2025 for the 2026 Notes, until the close of business on the scheduled trading day immediately preceding the maturity date, holders of the Notes may convert all or a portion of their notes regardless of these conditions. Under the terms of the respective Notes Indentures, effective January 1, 2022, the Company made an irrevocable election to settle the principal portion of the Notes only in cash, with the conversion premium to be settled in cash or shares.
During the three months ended September 30, 2022, the conditions allowing holders of the 2025 Notes and 2026 Notes to convert were not met. The Notes may be convertible thereafter if one or more of the conversion conditions specified in the indentures are satisfied during future measurement periods.
The Company may redeem the Notes at its option, on or after March 5, 2022 for the 2025 Notes, and March 20, 2023 for the 2026 Notes, at a redemption price equal to 100% of the principal amount thereof, plus accrued and unpaid special interest to, but excluding the redemption date, subject to certain conditions. No sinking fund is provided for the Notes.
Upon the occurrence of a fundamental change (as defined in each respective Notes Indentures) prior to the maturity date, holders may require the Company to repurchase all or a portion of the 2025 Notes or 2026 Notes for cash at a price equal to 100% of the principal amount of the Notes to be repurchased, plus any accrued and unpaid special interest to, but excluding, the fundamental change repurchase date.
The net carrying amount of the liability component of the Notes as of September 30, 2022 were as follows (in thousands):
2025 Notes2026 Notes
Principal$1,000,000 $650,000 
Unamortized issuance cost(6,555)(6,152)
Net carrying amount (1)
$993,445 $643,848 
(1)The net carrying amount was increased on January 1, 2022 as a result of the adoption of ASU No. 2020-06. Refer to Note 1, Description of Business and Summary of Significant Accounting Policies, in this Quarterly Report on Form 10-Q for further information.
The following table sets forth the total interest expense recognized related to the Notes (in thousands):
Three Months Ended
September 30,		Nine Months Ended
September 30,
2022202120222021
Amortization of debt discount (1)
$— $15,122 $— $45,645 
Amortization of debt issuance cost (1)
1,118 776 3,350 2,335 
Total interest expense related to the Notes (1)
$1,118 $15,898 $3,350 $47,980 
(1)The decrease in total interest expense during the three and nine months ended September 30, 2022 was due to the derecognition of the unamortized debt discount, partially offset by the increase in the amortization of issuance costs previously recognized in equity. These changes were the result of the Company’s adoption of ASU No. 2020-06, as of January 1, 2022, as described in Note 1, Description of Business and Summary of Significant Accounting Policies.
Capped Calls
In connection with the offering of the Notes, the Company entered into privately-negotiated capped call transactions relating to each series of notes with certain counterparties (collectively the “Capped Calls”). The initial strike price of the Notes corresponds to the initial conversion price of each of the Notes. The Capped Calls are generally intended to reduce or offset the potential dilution to the Class A Common Stock upon any conversion of the Notes with such reduction or offset, as the case may be, subject to a cap based on the cap price. The Capped Calls are subject to either adjustment or termination upon the occurrence of specified extraordinary events affecting the Company, including a merger event; a tender offer; and a nationalization, insolvency or delisting involving the Company. In addition, the Capped Calls are subject to certain specified additional disruption events that may give rise to a termination of the Capped Calls, including changes in law; insolvency filings; and hedging disruptions. The Capped Call transactions are recorded in stockholders’ equity and are not accounted for as derivatives.
The following table below sets forth key terms and costs incurred for the Capped Calls related to each of the Notes:
2023 Notes2025 Notes2026 Notes
Initial approximate strike price per share, subject to certain adjustments$81.45 $360.43 $424.03 
Initial cap price per share, subject to certain adjustments$119.04 $480.56 $556.10 
Net cost incurred (in millions)$49.9 $60.9 $41.8 
Class A Common Stock covered, subject to anti-dilution adjustments (in millions)5.62.81.5
Settlement commencement date1/13/20231/31/20242/13/2025
Settlement expiration date3/13/20232/28/20243/13/2025
All of the capped call transactions, including the capped call relating to the 2023 Notes, were outstanding as of September 30, 2022.