Filed Pursuant to Rule 424(b)(3)
Registration No. 333-259733
PROSPECTUS SUPPLEMENT NO. 2
(to Prospectus dated
September 30, 2021)
SPIRE GLOBAL, INC.
61,883,713 Shares of Class A Common Stock
6,600,000 Warrants to Purchase Class A Common Stock
18,099,992 Shares of Class A Common Stock Underlying Warrants
This prospectus supplement amends and supplements the prospectus dated September 30, 2021 (as supplemented or amended from time to time, the
Prospectus), which forms a part of our Registration Statement on Form S-1 (No. 333-259733). This prospectus supplement is being filed to update and
supplement the information in the Prospectus with the information contained in our Current Report on Form 8-K, filed with the Securities and Exchange Commission on November 4, 2021 (the Current
Report). Accordingly, we have attached the Current Report to this prospectus supplement.
The Prospectus and this prospectus supplement relate to
the resale of (i) 24,500,000 shares of Class A common stock, par value $0.0001 per share issued in the PIPE Investment by certain of the selling securityholders, (ii) 35,306,951 shares of Class A common stock issued to
certain securityholders in connection with the Business Combination, (iii) 2,076,762 shares of Class A common stock issuable to certain securityholders pursuant to the Earnout, and (iv) 6,600,000 warrants to purchase shares
of Class A common stock originally issued in connection with our initial public offering (private placement warrants). The Prospectus and this prospectus supplement also relate to the issuance by us of up to 18,099,992 shares
of Class A common stock that are issuable by us upon the exercise of the private placement warrants and the exercise of 11,499,992 warrants that were previously registered (public warrants).
We are registering the offer and sale of these securities to satisfy certain registration rights we have granted. The selling securityholders may sell the
securities described in the Prospectus in a number of different ways and at varying prices. We will not receive any of the proceeds from such sales, but we will receive the proceeds from the exercise of the warrants. The selling securityholders will
pay any underwriting discounts and commissions and expenses incurred by them in disposing of these securities. We will bear all other costs, fees and expenses incurred in effecting the registration of these securities, as described in more detail in
the section titled Use of Proceeds appearing elsewhere in the Prospectus. We provide more information about how the selling securityholders may sell their securities in the section titled Plan of Distribution
appearing elsewhere in the Prospectus.
The selling securityholders may sell any, all or none of the securities and we do not know when or in what amount
the selling securityholders may sell their securities hereunder following the effective date of this registration statement.
Our Class A common
stock is traded on NYSE under the symbol SPIR. Our public warrants are traded on the NYSE under the symbol SPIR.WT and, after resale, our private placement warrants will also trade under the same ticker symbol as the public
warrants. On November 3, 2021, the last quoted sale price for our Class A common stock as reported on NYSE was $5.78 and the last reported sale price of our public warrants was $1.25.
This prospectus supplement updates and supplements the information in the Prospectus and is not complete without, and may not be delivered or utilized except
in combination with, the Prospectus, including any amendments or supplements thereto. This prospectus supplement should be read in conjunction with the Prospectus and 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.
We are an emerging growth company, as defined
under the federal securities laws, and, as such, may elect to comply with certain reduced public company reporting requirements for future filings.
Investing in our securities
involves a high degree of risk. Before buying any securities, you should carefully read the discussion of the risks of investing in our securities in the section titled Risk
Factors beginning on page 10 of the Prospectus.
You should rely only on the information contained in the Prospectus and this
prospectus supplement or amendment hereto. We have not authorized anyone to provide you with different information.
Neither the Securities
Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if the Prospectus is truthful or complete. Any representation to the contrary is a criminal offense.
The date of this prospectus supplement is November 4, 2021.