Spire Global (SPIR) updates 5M-share offering and sets annual pay vote

Rhea-AI Filing Summary

Spire Global, Inc. is offering up to 5,000,000 shares of Class A common stock under a prospectus dated May 4, 2026, with this prospectus supplement incorporating an amended Current Report on Form 8-K/A. The supplement also describes governance decisions related to executive compensation votes.

Stockholders at the 2026 annual meeting supported holding an advisory vote on compensation for named executive officers every one year. On August 5, 2026, the Board of Directors determined to hold this advisory vote every one year until the next required frequency vote, currently no later than the 2032 annual meeting. The company’s Class A common stock trades on the NYSE under the symbol SPIR, with a last quoted sale price of $13.48 per share on August 4, 2026.

Filing Explained

The August 6 supplement updates the registration of 5,000,000 Class A shares under the company’s S-1. Registration creates capacity for a possible sale, but registration alone sells nothing, and this filing does not report that the shares were sold or issued.

Key Figures

Shares offered: 5,000,000 shares of Class A common stock Last quoted sale price: $13.48 per share Advisory vote frequency: Every one year +1 more

4 metrics

Shares offered 5,000,000 shares of Class A common stock Registered under prospectus dated May 4, 2026, as supplemented

Last quoted sale price $13.48 per share Class A common stock on NYSE as of August 4, 2026

Advisory vote frequency Every one year Board decision on say-on-pay frequency following 2026 stockholder vote

Next required frequency vote deadline 2032 annual meeting Next stockholder advisory vote on say-on-pay frequency required by then

Key Terms

prospectus supplement, Registration Statement on Form S-1, stockholder advisory vote, named executive officers, +1 more

5 terms

prospectus supplement regulatory

"This prospectus supplement amends and supplements the prospectus"

A prospectus supplement is an additional document provided alongside a company's main offering details, offering updated or extra information about a specific financial product being sold. It helps investors understand the latest terms, risks, and details of the investment, similar to how an update or revision clarifies or expands on original instructions, ensuring they have current and complete information before making a decision.

Registration Statement on Form S-1 regulatory

"forms a part of our Registration Statement on Form S-1"

A registration statement on Form S-1 is a detailed filing a company submits to the U.S. securities regulator to register new shares for public sale; it includes a plain-language prospectus, financial statements, business description and risk factors. For investors it matters because it provides the official, comprehensive blueprint of the offering — like an owner’s manual — allowing buyers to assess risks, inspect financial health and compare valuation before deciding to invest.

stockholder advisory vote financial

"stockholder advisory vote on the compensation paid"

named executive officers financial

"compensation paid to the Company’s named executive officers"

Named executive officers are the senior company leaders whose names, roles and compensation are singled out in required regulatory filings; this typically includes the chief executive, chief financial officer and the next highest‑paid senior officers. Investors treat this list like a team roster — it shows who makes key decisions, how they are paid and whether incentives align with shareholder interests, so changes or pay patterns can signal governance quality, risk or strategic shifts.

Item 5.07(d) of Form 8-K regulatory

"in accordance with Item 5.07(d) of Form 8-K"

Offering Details

shelf

Offering

Offering Type shelf

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Available on EDGAR 08/06/2026 - 04:44 PM Accepted by SEC EDGAR 08/06/2026 - 04:40 PM Learn about SEC filing dates

FAQ

What securities is Spire Global (SPIR) offering in this prospectus supplement?

Spire Global is offering up to 5,000,000 shares of Class A common stock under a prospectus dated May 4, 2026. This supplement updates that prospectus by incorporating information from an amended Form 8-K/A.

What stock exchange lists Spire Global (SPIR) Class A common stock and at what recent price?

Spire Global’s Class A common stock is listed on the New York Stock Exchange under the symbol SPIR. On August 4, 2026, the last quoted sale price was $13.48 per share.

How often will Spire Global (SPIR) hold advisory votes on executive compensation?

The Board determined Spire Global will hold a stockholder advisory vote every one year on compensation paid to named executive officers, consistent with the 2026 stockholder vote and Board recommendation.

Until when is Spire Global’s current say-on-pay frequency policy expected to apply?

The Board’s decision to hold advisory votes on executive compensation every one year will apply until the next stockholder advisory vote on frequency, currently required no later than the 2032 annual meeting.

What is the purpose of Spire Global’s Form 8-K/A (Amendment No. 1) referenced here?

The Form 8-K/A’s sole purpose is to disclose the Board’s decision on how frequently it will conduct future stockholder advisory votes on named executive officer compensation, as required by Item 5.07(d) of Form 8-K.

Does this Spire Global (SPIR) prospectus supplement change the original prospectus terms?

The supplement updates and supplements the May 4, 2026 prospectus by adding the Form 8-K/A information. It must be read together with the original prospectus and any other amendments or supplements.

Filed Pursuant to Rule 424(b)(3)

Registration No. 333-295274

PROSPECTUS SUPPLEMENT NO. 6

(to Prospectus dated May 4, 2026)

SPIRE GLOBAL, INC.

5,000,000 Shares of Class A Common Stock

This prospectus supplement amends and supplements the prospectus dated May 4, 2026 (as supplemented or amended from time to time, the “Prospectus”), which forms a part of our Registration Statement on Form S-1 (No. 333-295274).

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/A, filed with the Securities and Exchange Commission on August 6, 2026 (the “Current Report”). Accordingly, we have attached the Current Report to this prospectus supplement.

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.

Our Class A common stock is traded on the New York Stock Exchange (“NYSE”) under the symbol “SPIR.” On August 4‚ 2026, the last quoted sale price for our Class A common stock as reported on NYSE was $13.48 per share.

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 5 of the Prospectus.

You should rely only on the information contained in the Prospectus, this prospectus supplement and any other prospectus supplement or amendment hereto. We have not authorized anyone to provide you with different information.

NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR DETERMINED IF THIS PROSPECTUS IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

The date of this prospectus is August 6, 2026

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 8-K/A

(Amendment No. 1)

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 27, 2026

SPIRE GLOBAL, INC.

(Exact name of registrant as specified in its charter)

Delaware			001-39493	85-1276957
(State or other jurisdiction of incorporation)			(Commission File Number)	(IRS Employer Identification No.)
8000 Towers Crescent Drive Suite 1100
Vienna, Virginia				22182
(Address of principal executive offices)				(Zip code)

Registrant’s telephone number, including area code: (202) 301-5127

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐		Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐		Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐		Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐		Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Class A common stock, par value of $0.0001 per share		SPIR		The New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Explanatory Note

On May 28, 2026, Spire Global, Inc. (the “Company”) filed a Current Report on Form 8-K (the “Form 8-K”) disclosing the voting results at the Company’s 2026 annual meeting of stockholders held on May 27, 2026 (the “Annual Meeting”). The sole purpose of this amendment (this “Amendment”) to the Form 8-K is to disclose, in accordance with Item 5.07(d) of Form 8-K, the Company’s decision as to how frequently the Company will conduct future stockholder advisory votes on the compensation paid to the Company’s named executive officers. No changes are being made to the Form 8-K, other than to add the disclosure set forth in this Amendment.

Item 5.07 Submission of Matters to a Vote of Security Holders.

At the Annual Meeting, the Company’s stockholders voted on, among other matters, an advisory vote regarding the frequency of future votes on the compensation paid to the Company’s named executive officers. The frequency of every one year received the highest number of votes cast by stockholders, consistent with the recommendation of the Company’s Board of Directors. On August 5, 2026, the Company’s Board of Directors determined that, to the extent required by applicable law, regulation, or stock exchange rules, the Company will hold a stockholder advisory vote on the compensation paid to the Company’s named executive officers every one year, until the next stockholder advisory vote on the frequency of future votes on the compensation paid to the Company’s named executive officers, which is currently required to take place no later than the Company’s 2032 annual meeting of stockholders.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

			SPIRE GLOBAL, INC.
Date:	August 6, 2026	By:	/s/ Alison Engel
		Name: Title:	Alison Engel Chief Financial Officer