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Debt | 9 Months Ended
--- | ---
Sep. 30, 2025
Debt Disclosure [Abstract] |
Debt | DEBT A summary of debt is as follows (in millions):
|  |  | September 30, 2025 |  | December 31, 2024
| Maturity |  | Current |  | Long-Term |  | Current |  | Long-Term
8.25% Notes: | Feb. 2027 |  |  |  |  |  |  |  |
Principal |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 74.3 |
Interest |  |  | — |  |  | — |  |  | 6.1 |  |  | 9.2 |
2.25% Convertible Notes: | Nov. 2030 |  |  |  |  |  |  |  |
Principal |  |  | — |  |  | 402.5 |  |  | — |  |  | 402.5 |
0% Convertible Notes: | Aug. 2032 |  |  |  |  |  |  |  |
Principal |  |  | — |  |  | 805.0 |  |  | — |  |  | — |
Total |  |  | $ | — |  |  | $ | 1,207.5 |  |  | $ | 6.1 |  |  | $ | 486.0 |
A summary of interest expense and amortization of debt issuance costs is as follows (in millions):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
Contractual interest expense | $ | 2.3 |  |  | $ | — |  |  | $ | 6.8 |  |  | $ | — |
Amortization of debt issuance costs and discount | 0.9 |  |  | — |  |  | 2.0 |  |  | — |
Total interest expense on debt | $ | 3.2 |  |  | $ | — |  |  | $ | 8.8 |  |  | $ | — |
Convertible Notes In November 2024, the Company issued $402.5 million of 2.25% Convertible Notes due 2030 and in August 2025, the Company issued $805.0 million of 0% Convertible Notes due 2032. The Company evaluated its convertible debt to determine if the agreements or embedded components of the agreements qualify as derivatives to be accounted for separately and concluded that none of the embedded features of the convertible debt, inclusive of the conversion option, meet the criteria to require separate accounting. 0% Convertible Notes On August 18, 2025, the Company issued, in a Rule 144A offering, the 0% Convertible Notes with an aggregate principal amount of $805.0 million, due August 15, 2032, unless earlier repurchased, redeemed or converted. There are no required principal payments prior to the maturity of the 0% Convertible Notes. The 0% Convertible Notes will not bear regular interest and the principal amount will not accrete. The Company incurred approximately $22.5 million in issuance costs related to the issuance of the 0% Convertible Notes. The carrying amount of the 0% Convertible Notes as of September 30, 2025 was $782.9 million and included the remaining principal outstanding of $805.0 million, net of total unamortized debt discounts and deferred debt issuance costs of $22.1 million. Before May 15, 2032, noteholders may convert the 0% Convertible Notes in any of the following circumstances: •during the five consecutive business days immediately after any ten consecutive trading day period (the “Measurement Period”), in which the trading price per $1,000 principal amount of the 0% Convertible Notes for each trading day of the Measurement Period was less than 98% of the product of the last reported sale price per share of the Company’s Class A Common Stock on such trading day and the conversion rate on each such trading day; or •during any fiscal quarter commencing after the fiscal quarter ending on December 31, 2025, if the last reported sale price per share of the Company’s Class A Common Stock is greater than or equal to 130% of the conversion price for each of at least twenty trading days (whether or not consecutive) during the thirty consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter; or •upon the occurrence of certain corporate events or distributions on the Company’s Class A Common Stock; or •if the Company calls such notes for redemption at any time before the close of business on the second scheduled trading day immediately before the related redemption date. Beginning on May 15, 2032, noteholders may convert their notes at any time at their election until the close of business on the second business day immediately before the maturity date. The Company will satisfy its conversion obligations by paying cash up to the aggregate principal amount of notes to be converted, and by issuing shares of its Class A Common Stock or a combination of cash and shares of its Class A Common Stock, at its election for the incremental value. The initial conversion rate is 4.3551 shares of Class A Common Stock per $1,000 principal amount of the notes, representing an initial conversion price of approximately $229.62 per share of Class A Common Stock. The conversion rate will be adjusted upon the occurrence of certain events, including spin-offs, tender offers, exchange offers, make-whole fundamental change and certain stockholder distributions. Beginning on August 20, 2029, the Company may redeem for cash all or any portion of the notes, at a repurchase price equal to 100% of the principal amount, plus accrued and unpaid interest, if the last reported sale price per share 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 immediately preceding the date on which the Company provides a redemption notice. If certain corporate events that constitute a “fundamental change”, such as business combination transactions involving the Company, shareholder approval of liquidation or dissolution of the Company, and certain de-listing events with respect to the Company’s Class A Common Stock, occur at any time, holders may, subject to certain exceptions, require the Company to purchase their notes in whole or in part for cash at a price equal to 100% of the principal amount of the 0% Convertible Notes to be repurchased, plus accrued and unpaid interest, to, but excluding, the fundamental change repurchase date. 2.25% Convertible Notes On November 7, 2024, the Company issued, in a Rule 144A offering, the 2.25% Convertible Notes with an aggregate principal amount of $402.5 million, due November 1, 2030, unless earlier repurchased, redeemed or converted. There are no required principal payments prior to the maturity of the 2.25% Convertible Notes. The 2.25% Convertible Notes bear interest at an annual rate of 2.25%, payable semi-annually in arrears on May 1 and November 1 of each year, beginning on May 1, 2025. The Company incurred approximately $13.8 million in issuance costs related to the issuance of the 2.25% Convertible Notes. The carrying amount of the 2.25% Convertible Notes as of September 30, 2025 of $390.6 million, includes the remaining principal outstanding of $402.5 million, net of total unamortized debt discounts and deferred debt issuance costs of $11.9 million. Before August 1, 2030, noteholders may convert the 2.25% Convertible Notes in any of the following circumstances: •during the five consecutive business days immediately after any ten consecutive trading day period (the “Measurement Period”), in which the trading price per $1,000 principal amount of the 2.25% Convertible Notes for each trading day of the Measurement Period was less than 98% of the product of the last reported sale price per share of the Company’s Class A Common Stock on such trading day and the conversion rate on each such trading day; or •during any fiscal quarter commencing after the fiscal quarter ending on December 31, 2024, if the last reported sale price per share of the Company’s Class A Common Stock is greater than or equal to 130% of the conversion price for each of at least twenty trading days (whether or not consecutive) during the thirty consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter; or •upon the occurrence of certain corporate events or distributions on the Company’s Class A Common Stock; or •if the Company calls such notes for redemption, then the noteholder of any note may convert such note at any time before the close of business on the second scheduled trading day immediately before the related redemption date. Beginning on August 1, 2030, noteholders may convert their notes at any time at their election until the close of business on the business day immediately before the maturity date. The Company will satisfy its conversion obligations by paying cash up to the aggregate principal amount of notes to be converted, and by issuing shares of its Class A Common Stock or a combination of cash and shares of its Class A Common Stock, at its election for the incremental value. The initial conversion rate is 10.2564 shares of Class A Common Stock per $1,000 principal amount of the notes, representing an initial conversion price of approximately $97.50 per share of Class A Common Stock. The conversion rate will be adjusted upon the occurrence of certain events, including spin-offs, tender offers, exchange offers, make-whole fundamental change and certain stockholder distributions. Beginning on November 8, 2027, the Company may redeem for cash all or any portion of the notes, at a repurchase price equal to 100% of the principal amount, plus accrued and unpaid interest, if the last reported sale price per share 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 immediately preceding the date on which the Company provides a redemption notice. On June 30, 2025, the Company provided notice to the noteholders that the notes became convertible at the option of the holders beginning on July 1, 2025, and ending at the close of business on September 30, 2025. The notes are convertible at a conversion rate of 10.2564 shares of Class A Common Stock per $1,000 principal amount of notes, which is equivalent to a conversion price of approximately $97.50 per share of Class A Common Stock. The 2.25% Convertible Notes became convertible because the last reported sale price of shares of the Class A Common Stock, for at least 20 trading days during the period of 30 consecutive trading days ending on, and including, the last trading day of the calendar quarter ended June 30, 2025, was greater than 130% of the conversion price in effect on each applicable trading day. No notes were converted during that period. On September 30, 2025, the Company provided notice to the noteholders that the notes became convertible at the option of the holders beginning on October 1, 2025, and ending at the close of business on December 31, 2025. The notes are convertible at a conversion rate of 10.2564 shares of Class A Common Stock per $1,000 principal amount of notes, which is equivalent to a conversion price of approximately $97.50 per share of Class A Common Stock. The 2.25% Convertible Notes became convertible because the last reported sale price of shares of the Class A Common Stock, for at least 20 trading days during the period of 30 consecutive trading days ending on, and including, the last trading day of the calendar quarter ended September 30, 2025, was greater than 130% of the conversion price in effect on each applicable trading day. As of October 31, 2025, no notes have been converted under this recent conversion period If certain corporate events that constitute a “fundamental change”, such as business combination transactions involving the Company, shareholder approval of liquidation or dissolution of the Company, and certain de-listing events with respect to the Company’s Class A Common Stock, occur at any time, holders may, subject to certain exceptions, require the Company to purchase their notes in whole or in part for cash at a price equal to 100% of the principal amount of the 2.25% Convertible Notes to be repurchased, plus accrued and unpaid interest, to, but excluding, the fundamental change repurchase date. 8.25% Notes Pursuant to a notice of redemption issued on February 24, 2025, on March 26, 2025, the Company redeemed all 8.25% Notes at a redemption price equal to 100% of the $74.3 million aggregate principal amount, together with any accrued and unpaid interest. The Company recorded a gain of $11.8 million related to the extinguishment of the long-term debt. As of September 30, 2025, none of the 8.25% Notes remained outstanding. Interest on the Company’s 8.25% Notes was payable semi-annually in arrears as of February 28 and August 31 based on a 360-day year consisting of twelve 30-day months. The 8.25% Notes were issued in connection with a troubled debt restructuring; therefore, all future interest payment obligations on the 8.25% Notes were included in the carrying value of the 8.25% Notes. As a result, interest payments were reported as a reduction in the carrying value of the 8.25% Notes and not as interest expense. As of September 30, 2025 and December 31, 2024, $0 and $6.1 million, respectively, of interest was recorded as current and classified as Current Debt in the Consolidated Balance Sheets.

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481544/470-10-50-6 Reference 2: 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