| Unvested LTIP Units |
The below table details unvested OP LTIP Units as of December 31, 2020: | | | | | | | | | | | | | | | | | | | | | | Grant Recipient | | Number of OP LTIP Units Granted | | Grant Date | | Vesting Date(1) | | Directors: | | | | | | | | | 22,840 | | | September 10, 2020 | | September 9, 2021 | | Dedicated or partially dedicated personnel: | | | | | | | | | 10,067 | | | December 13, 2019 | | December 13, 2021 | | | 18,211 | | | December 17, 2020 | | December 17, 2021 | | | 9,834 | | | March 4, 2020 | | December 31, 2021 | | | 14,598 | | | December 17, 2020 | | December 17, 2022 | | Total unvested OP LTIP Units at December 31, 2020 | | 75,550 | | | | | |
(1)Date at which such OP LTIP Units will vest and become non-forfeitable. The below table details unvested OP LTIP Units as of December 31, 2018: | | | | | | | | | | | | | | | | | | | | | | Grant Recipient | | Number of OP LTIP Units | | Grant Date | | Vesting Date(1) | | Directors: | | | | | | | | | 14,440 | | | September 12, 2018 | | September 11, 2019 | | Partially dedicated employees: | | | | | | | | | 8,692 | | | December 11, 2018 | | December 11, 2019 | | | 8,691 | | | December 11, 2018 | | December 11, 2020 | | | 1,723 | | | March 7, 2018 | | March 7, 2019 | | | 5,886 | | | December 12, 2017 | | December 12, 2019 | Total unvested OP LTIP Units at December 31, 2018 | | 39,432 | | | | | |
(1)Date at which such OP LTIP Units will vest and become non-forfeitable.
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| Roll-Forward of Company's LTIP Units Outstanding |
The following tables summarize issuance and exercise activity of OP LTIP Units for the years ended December 31, 2020 and 2019: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Year Ended | | | December 31, 2020 | | December 31, 2019 | | | Manager | | Director/
Employee | | Total | | Manager | | Director/
Employee | | Total | OP LTIP Units Outstanding (December 31, 2019 and January 1, 2019, respectively) | | 365,518 | | | 180,198 | | | 545,716 | | | 375,000 | | | 146,371 | | | 521,371 | | | Granted | | — | | | 70,460 | | | 70,460 | | | — | | | 37,437 | | | 37,437 | | | Exercised | | — | | | (3,638) | | | (3,638) | | | (9,482) | | | (3,610) | | | (13,092) | | | OP LTIP Units Outstanding (December 31, 2020 and 2019, respectively) | | 365,518 | | | 247,020 | | | 612,538 | | | 365,518 | | | 180,198 | | | 545,716 | | | OP LTIP Units Unvested and Outstanding (December 31, 2020 and 2019, respectively) | | — | | | 75,550 | | | 75,550 | | | — | | | 46,128 | | | 46,128 | | | OP LTIP Units Vested and Outstanding (December 31, 2020 and 2019, respectively) | | 365,518 | | | 171,470 | | | 536,988 | | | 365,518 | | | 134,070 | | | 499,588 | |
The following table summarizes issuance and exercise activity of LTIP Units and OP LTIP Units for the year ended December 31, 2018: | | | | | | | | | | | | | | | | | | | Year Ended December 31, 2018 | | Manager | | Director/
Employee | | Total | LTIP Units and OP LTIP Units Outstanding (December 31, 2017) | 375,000 | | | 116,159 | | | 491,159 | | | Granted | — | | | 33,546 | | | 33,546 | | | Exercised | — | | | (3,334) | | | (3,334) | | LTIP Units and OP LTIP Units Outstanding (December 31, 2018) | 375,000 | | | 146,371 | | | 521,371 | | LTIP Units and OP LTIP Units Vested and Outstanding (December 31, 2018) | 375,000 | | | 106,939 | | | 481,939 | |
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