Filed Pursuant to Rule 424(b)(3)
Registration No. 333-251433
PROSPECTUS SUPPLEMENT
(To Prospectus dated
May 18, 2021)
306,053,642 Shares of Class A Common Stock
6,650,000 Warrants
This Prospectus Supplement supplements the prospectus dated May 18, 2021 (as supplemented to date, the
Prospectus), which forms a part of our Registration Statement on Post-Effective Amendment No. 3 to the Form S-1 (Registration Statement No. 333-
251433) filed with the Securities and Exchange Commission (the Commission) on May 17, 2021 and declared effective by the Commission on May 18, 2021.
The Prospectus and this Prospectus Supplement relate to the disposition from time to time of 1) up to 306,053,642 shares of our Class A
Common Stock, which include Class A Common Stock issuable upon conversion of our Class B Common Stock, the exercise of certain private placement and public warrants (together, the Warrants), the exercise of certain stock
options, and the vesting of certain restricted stock units, and 2) up to 6,650,000 private placement warrants, which are held or may be held by the selling securityholders named in the Prospectus. We will not receive any proceeds from the sale of
our securities offered by the selling securityholders under the Prospectus.
On August 24, 2021, we redeemed all outstanding public
warrants that had not been exercised as of such date (the Redemption Date). We have received an aggregate of $151,430,588.87 from the cash exercise of public warrants prior to the Redemption Date, net of the amount paid for redemption of
unexercised public warrants. We expect to receive approximately $53,582,122.50 assuming the exercise of all outstanding private placement warrants for cash at a current exercise price of $11.50 per share, less the amount that will not be received
due to cashless exercises and redemption.
This Prospectus Supplement should be read in conjunction with the Prospectus, which is to be
delivered with this Prospectus Supplement. This Prospectus Supplement updates, amends and supplements the information included or incorporated by reference in the Prospectus. If there is any inconsistency between the information in the Prospectus
and this Prospectus Supplement, you should rely on the information in this Prospectus Supplement.
This Prospectus Supplement is not
complete without, and may not be delivered or utilized except in connection with, the Prospectus, including any amendments or supplements to it.
Current Report on Form 8-K
On September 21, 2021, we filed a Current Report on Form 8-K with the Commission. The portion of
the text of such Form 8-K that is treated as filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, is attached hereto.