Annual report pursuant to Section 13 and 15(d)


12 Months Ended
Dec. 31, 2018
Subsequent Events [Abstract]  
Self Storage Property Acquisitions
In January and February 2019, the Company acquired 23 self storage properties for approximately $147.0 million. Consideration for these acquisitions included approximately $122.9 million of net cash, the assumption of $0.4 million of other working capital liabilities and OP equity of approximately $23.7 million (consisting of the issuance of 58,942 OP Units, 158,199 Series A-1 preferred units and 692,075 subordinated performance units). In connection with these acquisitions, the Company reimbursed the PROs for $0.1 million of due diligence costs related to the self storage properties sourced by the PROs.
In February 2019, the Company entered into definitive agreements with affiliates of Investment Real Estate Management, LLC d/b/a Moove In Self Storage of York, Pennsylvania to add Moove In Self Storage ("Moove In") as the Company's tenth PRO. Moove In currently owns 19 self storage properties in Pennsylvania, Maryland, New Jersey, and New York. Upon closing, Moove In intends to contribute six self storage properties to NSA as part of the initial contribution transaction, and its remaining properties will be added to the Company's captive pipeline. The Company expects the initial contribution transaction and related closing documentation, including the entry into a facilities portfolio management agreement, to close during the first quarter of 2019, subject to customary closing conditions.
Subordinated Performance Unit To OP Unit Conversions
Subordinated performance units are convertible into OP units after a two year lock-out period and then generally (i) at the holder’s election only upon the achievement of certain performance thresholds relating to the properties to which such subordinated performance units relate (a "voluntary conversion") or (ii) at the Company's election upon a retirement event of a PRO that holds such subordinated performance units or upon certain qualifying terminations.
Following such lock-out period, a holder of subordinated performance units in the Company's operating partnership may elect a voluntary conversion one time each year prior to December 1st to convert a pre-determined portion of such subordinated performance units into OP units in the Company's operating partnership, with such conversion effective January 1st of the following year with each subordinated performance unit being converted into the number of OP units determined by dividing the average cash available for distribution, or CAD, per unit on the series of specific subordinated performance units over the one-year period prior to conversion by 110% of the CAD per unit on the OP units determined over the same period. CAD per unit on the series of specific subordinated performance units and OP units is determined by the Company based generally upon the application of the provisions of the operating partnership agreement applicable to the distributions of operating cash flow and capital transactions proceeds.
During the year ended December 31, 2018, the Company received notices requesting the conversion of 929,057 subordinated performance units (including 15,377 subordinated performance units in the Company's DownREIT partnerships). Effective January 1, 2019, the Company issued 876,623 OP units (including 13,475 OP units in the Company's DownREIT partnerships) in satisfaction of such conversion requests.