the principal amount of the 2.85% Notes being redeemed; and (ii) a make-whole premium calculated in accordance with the indenture, plus, in each case, accrued and unpaid interest thereon to, but not including, the applicable redemption date. If the 2.85% Notes are redeemed on or after October 15, 2031, the redemption price will be equal to 100% of the principal amount of the 2.85% Notes being redeemed, plus accrued and unpaid interest thereon to, but not including, the applicable redemption date.
In January 2022, the Operating Partnership (as issuer) and the Company (as guarantor), issued $475.0 million aggregate principal amount of privately-placed 3.98% senior notes due February 2052 (the “3.98% Notes”). The Operating Partnership elected to draw these funds in March 2022. The Company may, at its option, prepay at any time all, or from time to time any part of, the 3.98% Notes, in an amount not less than 5% of the aggregate principal amount of the 3.98% Notes then outstanding in the case of a partial prepayment, at 100% of the principal amount so prepaid, and the applicable make-whole amount calculated in accordance with the indenture, for such tranche determined for the prepayment date with respect to such principal amount; provided, that, so long as no default or event of default shall then exist, at any time on or after November 15, 2051, the Company may, at its option, prepay all or any part of the 3.98% Notes at 100% of the principal amount so prepaid, together with, in each case, accrued interest to the prepayment date, without any make-whole amount.
In May 2022, the Operating Partnership (as issuer) and the Company (as guarantor), issued $150.0 million aggregate principal amount of privately-placed 5.15% senior notes due May 2052 (the “5.15% Notes”). The structure of the 5.15% Notes features a stairstep coupon rate in which the Company will pay cash interest at a rate of 2.50% in years 1 through 10, 3.75% in years 11 through 20, and 5.15% in years 21 through 30. The difference between the 5.15% stated rate and the cash interest rate will accrue in each semi-annual payment period and be paid in kind by adding such accrued interest to the outstanding principal balance, to be repaid at maturity in May 2052. The Company may, at its option, prepay at any time all, or from time to time any part of, the 5.15% Notes, in an amount not less than 5% of the aggregate principal amount of the 5.15% Notes then outstanding in the case of a partial prepayment, at 100% of the principal amount so prepaid, and the applicable make-whole amount calculated in accordance with the indenture; provided, that, so long as no default or event of default shall then exist, at any time on or after February 13, 2052, the Company may, at its option, prepay all or any part of the 5.15% Notes at 100% of the principal amount so prepaid, together with, in each case, accrued interest to the prepayment date, without any make-whole amount.
Unsecured Revolver—In March 2021, the Operating Partnership (as borrower) and the Company (as guarantor), entered into an unsecured revolving credit facility with an initial maximum aggregate principal amount of up to $1.0 billion (the “Unsecured Revolver”). In December 2021, the Company obtained additional lender commitments increasing the maximum availability to $1.35 billion. The Unsecured Revolver has an initial maturity of March 2024 with 2 12-month extension options exercisable by the Company, subject to certain conditions, and bears interest at an annual rate of applicable LIBOR plus 1.00%, subject to the Company’s credit ratings. The Company also pays a facility fee of 0.125%, subject to the Company’s credit ratings. As of June 30, 2022, there was $0.9 billion of undrawn capacity on the Unsecured Revolver.
Debt Covenants—The Company is subject to financial covenants under the Unsecured Revolver, including maintaining: (i) a ratio of unencumbered assets to unsecured debt of at least 1.33x; and (ii) a consolidated fixed charge coverage ratio of at least 1.15x, as such terms are defined in the documents governing the Unsecured Revolver. In addition, the Unsecured Revolver contains customary affirmative and negative covenants. Among other things, these covenants may restrict the Company or certain of its subsidiaries’ ability to incur additional debt or liens, engage in certain mergers, consolidations and other fundamental changes, make other investments or pay dividends. The Company’s 2.80% Notes, 2.85% Notes, 3.98% Notes and 5.15% Notes are subject to a financial covenant requiring a ratio of unencumbered assets to unsecured debt of at least 1.25x and contain customary affirmative and negative covenants. The Company’s 3.98% Notes and 5.15% Notes contain a provision whereby they will be deemed to include additional financial covenants and negative covenants to the extent such covenants are incorporated into the Operating Partnership’s and/or the Company’s