Filed Pursuant to Rule 424(b)(5)
Registration No. 333-271361
PROSPECTUS SUPPLEMENT
(to Prospectus dated
February 14, 2024)
30,000,000 Shares of Class A Common Stock
Pre-Funded Warrants to Purchase up to 16,136,102 Shares of Class A Common Stock
Class 1 Warrants to Purchase up to 23,068,051 Shares of Class A Common Stock
Class 2 Warrants to Purchase up to 23,068,051 Shares of Class A Common Stock
Class A Common Stock Underlying the Pre-Funded Warrants, Class 1 Warrants and Class 2
Warrants
We are offering 30,000,000 shares of our Class A Common Stock, par value $0.0001 per share (Class A Common Stock), Class 1 Warrants
to purchase 23,068,051 shares of our Class A Common Stock (the Class 1 Warrants), Class 2 Warrants to purchase 23,068,051 shares of our Class A Common Stock (the Class 2 Warrants and, together with
the Class 1 Warrants, the Warrants and each, a Warrant) and, in lieu of Class A Common Stock, Pre-Funded Warrants to purchase 16,136,102 shares of our Class A Common
Stock (the Pre-Funded Warrants) pursuant to this prospectus supplement and the accompanying base prospectus.
The purchase price of each share of Class A Common Stock and accompanying Warrant is $0.8670. The purchase price of each
Pre-Funded Warrant and accompanying Warrant equals the price at which shares of our Class A Common Stock are being sold in this registered direct offering minus $0.0001, and the exercise price of each Pre-Funded Warrant equals $0.0001 per share. The exercise price of each Warrant equals $1.0200 per share. This prospectus supplement also relates to the offering of the shares of Class A Common Stock issuable
upon the exercise of the Warrants and the exercise of the Pre-Funded Warrants. The securities are being sold in this offering to certain purchasers under a securities purchase agreement dated February
29, 2024 (the Purchase Agreement) among us and the purchasers identified on the signature pages thereto.
In a concurrent registered direct
offering (the Concurrent Offering), we are selling to our affiliate, Intercontinental Exchange Holdings, Inc. or its related investment vehicle (together, ICE), up to 11,534,025 shares of our Class A Common Stock,
Class 1 Warrants to purchase up to 5,767,012 shares of our Class A Common Stock, and Class 2 Warrants to purchase up to 5,767,012 shares of our Class A Common Stock, at the same purchase price as the purchasers in this offering,
for an aggregate purchase price of up to approximately $10 million. Of such securities, 2,762,009 shares of our Class A Common Stock, Class 1 Warrants to purchase 1,381,004 shares of our Class A Common Stock and Class 2
Warrants to purchase 1,381,004 shares of our Class A Common Stock will be issued concurrently with the closing of the securities being offered pursuant to this prospectus supplement and the accompanying base prospectus in accordance with the
Purchase Agreement, and the remaining securities being issued to ICE will be issued after we obtain the necessary stockholder approvals in accordance with the Listed Company Manual of the New York Stock Exchange (NYSE), subject to
customary other closing conditions. ICE is providing a voting support agreement in connection with this offering and the Concurrent Offering, which generally provides that ICE will attend the special meeting (the Special Meeting) to
approve the issuance of the shares of Class A Common Stock issuable in respect of the Concurrent Offering and the shares of Class A Common Stock underlying the accompanying warrants that exceed the limitations of the Listed Company Manual
of the NYSE and the shares of Class A Common Stock underlying the alternative cashless exercise provision of the Class 2 Warrants described below being issued in this offering and the Concurrent Offering and to vote in support of such
proposal at the Special Meeting. The securities being issued in the Concurrent Offering to ICE are being offered pursuant to the registration statement of which this prospectus supplement forms a part, but are not being offered pursuant to this
prospectus supplement and the accompanying base prospectus.