Filed Pursuant to Rule 424(b)(5)
Registration No. 333-271361
PROSPECTUS SUPPLEMENT
(to Prospectus dated February 14, 2024)
11,534,025 Shares of Class A Common Stock
Class 1 Warrants to Purchase up to 5,767,012 Shares of Class A Common Stock
Class 2 Warrants to Purchase up to 5,767,012 Shares of Class A Common Stock
Class A Common Stock Underlying the Class 1 Warrants and Class 2 Warrants
We are offering up to 11,534,025 shares of our Class A Common Stock, par value $0.0001 per share (Class A Common Stock), Class 1
Warrants to purchase up to 5,767,012 shares of our Class A Common Stock (the Class 1 Warrants), and Class 2 Warrants to purchase up to 5,767,012 shares of our Class A Common Stock (the Class 2
Warrants and, together with the Class 1 Warrants, the Warrants and each, a Warrant) 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 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. The securities are being sold in this offering to our affiliate, Intercontinental Exchange Holdings, Inc. (ICE) under a securities purchase agreement (the Purchase Agreement) dated February 29, 2024 between
us and ICE. 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 in the Concurrent Offering (as defined below) (the Initial Closing), 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) and upon the satisfaction of certain customary 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 related 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 in the Concurrent Offering and to vote in support of such proposal at the Special Meeting.
In a concurrent registered direct offering (the Concurrent Offering), we are selling to certain other institutional investors 30,000,000 shares of
our Class A Common Stock, Class 1 Warrants to purchase 23,068,051 shares of our Class A Common Stock, Class 2 Warrants to purchase 23,068,051 shares of our Class A Common Stock, 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), at a purchase price of $0.8670 per share of
Class A Common Stock and accompanying warrants, the same purchase price as ICE in this offering, and $0.8669 per Pre-Funded Warrant and accompanying warrants, for an aggregate purchase price of
approximately $40 million. The securities being issued in the Concurrent Offering to certain other institutional investors 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.
Our Class A Common Stock is listed on NYSE under the symbol
BKKT. On February 28, 2024, the last reported sale price of our Class A Common Stock on NYSE was $1.0200 per share. There is no established public trading market for the Warrants and we do not expect a market to develop for
either security. Without an active trading market, the liquidity of the Warrants will be limited. In addition, we do not intend to list the Warrants on NYSE, any other national securities exchange, or any other trading system.
We will deliver all securities to be issued in connection with this offering upon receipt of purchaser funds received by us.
Investing in these securities involves risks. Please carefully read the information under the headings Risk Factors
beginning on page S-7 of this prospectus supplement, page 7 of the accompanying base prospectus and in the documents incorporated by reference in this prospectus supplement for a discussion of the factors you
should carefully consider before deciding to purchase our securities.
Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus supplement or the accompanying base prospectus. Any representation to the contrary is a criminal offense.
We are offering shares of our Class A Common Stock and accompanying Warrants at a price of $0.8670 per share of Class A Common Stock and accompanying
Warrant. We expect to receive gross proceeds of up to approximately $10 million, which does not take into account the sale of our securities to the other purchasers in the Concurrent Offering, nor the exercise of any Warrants issued pursuant to
this offering or the Concurrent Offering, approximately $2.4 million of which will be received at the Initial Closing and up to approximately $7.6 million of which may be received two Trading Days (as defined in the Purchase Agreement)
following the satisfaction of the closing conditions set forth in the Purchase Agreement, including obtaining Stockholder Approval (as defined in the Purchase Agreement).
We anticipate that delivery of the Class A Common Stock and the Warrants against payment at the Initial Closing will be made on or about March 4, 2024.
The date of this prospectus supplement is February 29, 2024.