Prospectus excerpt:  The selling shareholders named in this prospectus supplement (the “Selling Shareholders”) are offering to sell 5,000,000 shares of our 8.00% Resettable Fixed Rate Preference Shares, Series B, par value $0.10 per share, $25.00 liquidation preference per share (the “Series B Preference Shares”). We will not receive any proceeds from sales of the Series B Preference Shares offered by the Selling Shareholders pursuant to this prospectus supplement, but we have agreed to pay certain registration expenses, other than underwriting discounts and commissions. Dividends on the Series B Preference Shares are cumulative from May 31, 2021 and will be payable quarterly in arrears on the last day of February, May, August and November of each year, from and including August 31, 2021, when, as and if declared by our board of directors (the “Board of Directors”). Dividends on each Series B Preference Share accrue from, and include, May 31, 2021, whether or not declared, and whether or not there are earnings or profits, surplus or other funds or assets of the Company legally available for the payment of dividends. Dividends will be payable in an amount per Series B Preference Share equal to (i) from and including May 31, 2021, to but excluding February 26, 2026, an amount equal to 8.00% of $25.00 per annum, or $2.00, and (ii) from and including February 26, 2026, during each Reset Period (as defined in “Description of Series B Preference Shares”), an amount equal to (A) the Five-Year U.S. Treasury Rate (as defined in “Description of Series B Preference Shares”) as of the most recent Reset Dividend Determination Date (as defined in “Description of Series B Preference Shares”) plus (B) 7.298% of $25.00 per annum.