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Long-term Debt | 6 Months Ended
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Jun. 30, 2024
Debt Disclosure [Abstract] |
Long-term Debt | 8. Long-term Debt Convertible Senior Notes On September 16, 2019, the Company completed a private offering of convertible notes (the “2019 Convertible Notes”) with an aggregate principal amount of $220.0 million issued pursuant to an indenture (the “Indenture”) with U.S. Bank National Association, as trustee. The net proceeds from the sale of the 2019 Convertible Notes were approximately $212.9 million after deducting the initial purchasers’ discounts and commissions of $6.6 million and offering expenses of $0.5 million. The Company used $28.4 million of the net proceeds to pay the cost of the capped call transactions in September 2019 described below. On May 12, 2020, the Company issued convertible notes (the “2020 Convertible Notes”) with an aggregate principal amount of $300.0 million. The net proceeds from the sale of the 2020 Convertible Notes were approximately $322.9 million after deducting the purchasers’ discounts and commission of $5.7 million and offering expenses of $0.3 million. The Company used $43.1 million of the net proceeds to pay the cost of the additional capped call transactions in May 2020 described below. The 2019 Convertible Notes and the 2020 Convertible Notes are referred to together as the Convertible Notes. The Convertible Notes are senior unsecured obligations of the Company and bear interest at a rate of 3.5% per year payable semiannually in arrears on March 15 and September 15 of each year, beginning on March 15, 2020. The Convertible Notes will mature on September 15, 2026, unless converted earlier, redeemed or repurchased in accordance with their terms. The Convertible Notes are convertible into shares of the Company’s common stock at an initial conversion rate of 25.3405 shares per $1,000 principal amount of Convertible Notes (equivalent to an initial conversion price of approximately $39.4625 per share of common stock). The conversion rate is subject to customary anti-dilution adjustments. In addition, following certain events that occur prior to the maturity date or if the Company delivers a notice of redemption, the Company will increase the conversion rate for a holder who elects to convert its Convertible Notes in connection with such corporate event or a notice of redemption, as the case may be, in certain circumstances as provided in the Indenture. Prior to March 15, 2026, the Convertible Notes are convertible only under the following circumstances: • during any calendar quarter, if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; • during the five business day period after any five consecutive trading day period in which the trading price per $1,000 principal amount of the Convertible Notes for each such trading day was less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate on each such trading day; • if the Company calls any or all of the Convertible Notes for redemption, at any time prior to the close of business on the second scheduled trading day immediately preceding the redemption date; or • upon the occurrence of corporate events specified in the Indenture. On or after March 15, 2026 until the close of business on the second scheduled trading day immediately preceding the maturity date of the Convertible Notes, holders may convert the Convertible Notes at any time regardless of the foregoing circumstances. Upon conversion of the Convertible Notes, the Company will pay or deliver, as the case may be, cash, shares of the Company’s common stock or a combination of cash and shares of common stock, at the Company’s election. On or after September 20, 2023, the Company may redeem for cash all or a portion of the Convertible Notes, at its option, if the last reported sale price of the Company’s common stock has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive), including the trading day immediately preceding the date on which the Company provides a notice of redemption, during any 30 consecutive trading day period ending on, and including, the trading day immediately preceding the date on which the Company provides notice of redemption. The redemption price will be equal to 100% of the principal amount of the Convertible Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. If the Company calls any Convertible Notes for redemption, it will constitute a “make-whole fundamental change” with respect to such Convertible Notes, in which case the conversion rate applicable to the conversion of such Notes, if converted in connection with the redemption, will be increased in certain circumstances. The Company has not called for redemption or redeemed any of the Convertible Notes as of June 30, 2024. If the Company undergoes a “fundamental change,” as defined in the Indenture, prior to maturity, subject to certain conditions, holders may require the Company to repurchase for cash all or any portion of their Convertible Notes at a fundamental change repurchase price equal to 100% of the principal amount of the notes to be repurchased, plus any accrued and unpaid interest to, but excluding, the fundamental change repurchase date. In January 2021, July 2021 and July 2022, the Company entered into separate, privately negotiated exchange agreements to modify the conversion terms with certain holders of its 2019 Convertible Notes and 2020 Convertible Notes. Under the terms of these exchange agreements, in January 2021, July 2021 and July 2022, the holders exchanged approximately $126.1 million of 2019 Convertible Notes, $201.1 million of 2019 Convertible Notes and 2020 Convertible Notes, and $98.1 million of 2020 Convertible Notes, respectively, in aggregate principal amount held by them for an aggregate of 3,906,869 shares, 5,992,217 shares and 3,027,018 shares, respectively, of common stock issued by the Company. In accordance with FASB ASC Topic 470-20, “Debt – Debt with Conversion and Other Options,” (“ASC 470-20”) the Company accounted for the exchange as an induced conversion based on the short period of time the conversion offer was open and the substantive conversion feature offer. The Company accounted for the conversion of the debt as an inducement by expensing the fair value of the shares that were issued in excess of the original terms of the Convertible Notes. The conditional conversion feature of the Convertible Notes was triggered as of December 31, 2023, and as a result the Convertible Notes were convertible at the option of the holders until March 31, 2024. No Convertible Notes were converted during this period. The conditional conversion feature of the Convertible Notes was triggered as of March 31, 2024, and as a result the Convertible Notes were convertible at the option of the holders until June 30, 2024. No Convertible Notes were converted during this period. The conditional conversion feature of the Convertible Notes was not triggered as of June 30, 2024, and as a result the Convertible Notes are not convertible during the quarter ending September 30, 2024. As of June 30, 2024, the Company held in treasury Convertible Notes in principal amount of $425.4 million which notes had not been cancelled. The outstanding balance of the Convertible Notes as of June 30, 2024 and December 31, 2023 consisted of the following (in thousands):
|  | June 30, |  |  | December 31, |
|  | 2024 |  |  | 2023 |
Liability |  |  |  |  |  |
Principal |  | $ | 93,897 |  |  | $ | 93,897 |
Less: debt discount and issuance costs, net |  |  | (711 | ) |  |  | (864 | )
Net carrying amount |  | $ | 93,186 |  |  | $ | 93,033 |
The following table sets forth total interest expense recognized related to the Convertible Notes during the three and six months ended June 30, 2024 and 2023 (in thousands):
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2024 |  |  | 2023 |  |  | 2024 |  |  | 2023 |
Amortization of debt issuance costs |  | $ | 77 |  |  | $ | 74 |  |  | $ | 153 |  |  | $ | 147 |
Contractual interest expense |  |  | 822 |  |  |  | 822 |  |  |  | 1,643 |  |  |  | 1,643 |
Total interest expense |  | $ | 899 |  |  | $ | 896 |  |  | $ | 1,796 |  |  | $ | 1,790 |
Capped Call Transactions On September 11, 2019 and May 6, 2020, concurrently with the pricings of the Convertible Notes, the Company entered into capped call transactions with two counterparties. The capped call transactions are expected generally to reduce the potential dilution to the Company’s common stock upon any conversion of Convertible Notes and/or offset any cash payments the Company is required to make in excess of the principal amount of converted Convertible Notes, as the case may be, in the event that the market price per share of the Company’s common stock, as measured under the terms of the capped call transactions, is greater than the strike price of the capped call transactions, which is initially $39.4625 (the conversion price of the Convertible Notes) and is subject to anti-dilution adjustments substantially similar to those applicable to the conversion rate of such Convertible Notes. If, however, the market price per share of the Company’s common stock, as measured under the terms of the capped call transactions, exceeds the cap price of the capped call transactions, which is initially $63.14 per share, there would nevertheless be dilution and/or there would not be an offset of such potential cash payments, in each case, to the extent that such market price exceeds the cap price of the capped call transactions. On February 27, 2024, the Company unwound a portion of the capped call transactions with the capped call counterparties, which resulted in cash proceeds to the Company of $98.8 million. The unwind transactions were settled at a volume-weighted average price per share of $64.11 on March 8, 2024. As of June 30, 2024, the Company holds remaining capped call transactions in a notional amount corresponding to $93.9 million principal amount of Convertible Notes. Financing Agreement and Credit Facility On May 13, 2024, the Company and certain of its subsidiaries entered into a financing agreement (the “Sixth Street Financing Agreement”) with the lenders party thereto (the “Lenders”), and Sixth Street Lending Partners (“Sixth Street”), as the administrative agent and collateral agent for the Lenders. The Sixth Street Financing Agreement provides for a senior secured term loan facility of up to $475.0 million (the “Credit Facility”), consisting of an initial draw of $375.0 million at closing and a potential additional $100.0 million draw at the Company’s option upon satisfaction of a $50.0 million minimum cash requirement and a requirement that the Company’s trailing three-month sales of SYFOVRE is at least $180.0 million prior to the $100.0 million draw. The Company can exercise the option for the $100.0 million draw through September 30, 2025, assuming such requirements are met. The Credit Facility matures on May 13, 2030 (the “Maturity Date”) and bears interest at (i) in the case of SOFR Loans, an annual rate equal to 3-month Term SOFR (subject to 1.00% floor), plus 5.75%, and (ii) in the case of Base Rate Loans, an annual rate equal to the base rate as defined in the agreement (subject to 2.00% floor), plus 4.75%. Certain additional commitment and undrawn amount fees are also payable in connection with the Credit Facility. The net proceeds from the initial draw of the Credit Facility were approximately $363.9 million, net of $11.1 million of issuance costs. The Company used $326.5 million of the proceeds from the initial draw of the Credit Facility to buy out its remaining obligations to SFJ. The buyout of the SFJ development liability eliminated $366.0 million in payments to SFJ between 2024 and 2027, including approximately $200.0 million payable through 2025 (See Note 6). The Credit Facility does not provide for scheduled amortization payments during the term. All principal will be due on the Maturity Date. The Company will have the right to prepay loans under the Credit Facility at any time. The Company is required to repay loans under the Credit Facility with proceeds from certain asset sales, condemnation events and extraordinary receipts, subject, in some cases, to reinvestment rights. Repayments are subject to a prepayment premium. Repayments may be made after the first year of the loan and are subject to a prepayment premium up to 3% depending on timing. All obligations under the Sixth Street Financing Agreement will be secured on a first-priority basis, subject to certain exceptions, by security interests in substantially all assets of the Company and certain subsidiaries of the Company, including its intellectual property, and will be guaranteed by certain subsidiaries of the Company, including foreign subsidiaries, subject to certain exceptions. The Sixth Street Financing Agreement contains customary covenants, including, without limitation, a financial covenant to maintain liquidity of at least $50.0 million if the Company’s market capitalization is below $3.0 billion, and negative covenants that, subject to certain exceptions, restrict indebtedness, liens, investments (including acquisitions), fundamental changes, asset sales and licensing transactions, dividends, modifications to material agreements, payment of subordinated indebtedness, and other matters customarily restricted in such agreements. Among other permissions, the Company is permitted, on terms and conditions set forth on the Sixth Street Financing Agreement, to enter into a separate asset-based financing arrangement with a third party in an amount of up to $100.0 million, which amount is increased to $200.0 million upon certain sales or market capitalization thresholds, and to have outstanding convertible unsecured notes in an amount equal to the greater of $400.0 million and 10% of the Company’s market capitalization, but not to exceed $600.0 million. The Company is subject to restrictions on sales and licensing transactions with respect to its core intellectual property, defined to include SYFOVRE, EMPAVELI, and other pegcetacoplan product assets, subject to certain exceptions, including certain transactions related to areas outside the United States and Europe. The outstanding balance of the Credit Facility as of June 30, 2024 and December 31, 2023 consisted of the following (in thousands):
|  | June 30, |  |  | December 31, |
|  | 2024 |  |  | 2023 |
Liability |  |  |  |  |  |
Principal |  | $ | 375,000 |  |  | $ | — |
Less: debt discount and issuance costs |  |  | (10,975 | ) |  |  | — |
Net carrying amount |  | $ | 364,025 |  |  | $ | — |
The following table sets forth total interest expense recognized related to the Credit Facility during the three and six months ended June 30, 2024 and 2023 (in thousands):
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2024 |  |  | 2023 |  |  | 2024 |  |  | 2023 |
Amortization of debt issuance costs |  | $ | 161 |  |  | $ | — |  |  | $ | 161 |  |  | $ | — |
Contractual interest expense |  |  | 5,306 |  |  |  | — |  |  |  | 5,306 |  |  |  | — |
Total interest expense |  | $ | 5,467 |  |  | $ | — |  |  | $ | 5,467 |  |  | $ | — |

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