On July 1, 2019, we completed our IPO. For details regarding this event, including the automatic conversion of all shares of our convertible preferred stock into common stock, our amended and restated articles of incorporation and bylaws and our 2019 Plan, please refer to Note 1 – Organization and Description of Business – Initial Public Offering.

In August 2019, we entered into an operating lease to rent 100,000 square feet in a to-be-constructed building in Seattle, Washington. Shell construction is expected to be completed in 2020. The lease term commences on the date that the landlord delivers the premises to us for construction of certain tenant improvements. Rent obligations commence 10 months thereafter, and the lease term ends 142 months form the date rent commences, subject to our option to twice extend the lease for five years. The lease is cancellable under certain circumstances if the landlord fails to deliver the premises to us by May 1, 2021. We plan to occupy the new building in 2021, once interior construction is finished. The lease also requires us to pay additional amounts for operating and maintenance expenses. In connection with the new lease, we also entered into a letter of credit of $2.1 million with one of our existing financial institutions.

Furthermore, in August 2019, we amended the lease for our current headquarters in Seattle, Washington to expand the size of the existing premises by approximately 8,400 square feet. Rent obligations of the expanded premises commence four months after the landlord delivers the premises to us for construction of certain tenant improvements, and the lease term for both the existing premises and the expanded premises ends 142 months after the commencement date of the new lease mentioned above, subject to our option to twice extend the lease for five years. If the new lease does not commence, the lease term for the existing premises and the expanded premises ends March 31, 2024.

Expected future minimum payments for the leased spaces, exclusive of operating and maintenance costs and assuming attainment of our target commencement dates, are as follows (in thousands) (unaudited):

2019	$	1,431
2020		3,053
2021		5,802
2022		9,706
2023		9,975
Thereafter		105,270
Total future minimum lease payments	$	135,237