Convertible Notes Convertible Notes Issue Date Security Outstanding Principal Maturity Date CUSIP Conversion Ratio3 Date Last Changed 4/11/2017 4.950% Senior Convertible Notes due 2022 $136,228,000 1 7/15/2022 74348TAR3 100.2305 4/11/2017 3/1/2019 6.375% Senior Convertible Notes due 2025 $181,250,000 2 3/1/2025 74348TAT9 110.7420 3/1/2019 1As of 12/31/2020 and as adjusted for a tender offer settled on 1/20/2021 in which $26.7 million of the 2022 Convertible Notes were validly tendered and accepted as disclosed in the 12/31/2020 10-Q. 2As of 12/31/2020 and as adjusted for a tender offer settled on 1/29/2021 in which $20.0 million of the 2025 Convertible Notes were validly tendered and accepted as disclosed in the 12/31/2020 10-Q. 3 We do not expect any changes in the conversion ratio for any of the bonds until the dividend rate is increased to over $0.06000 per share per month.