Spire Global files supplement to register 5M shares

Spire Global, Inc. filed a prospectus supplement registering 5,000,000 shares of Class A common stock pursuant to its Registration Statement on Form S-1.

Rhea-AI Filing Summary

Spire Global, Inc. filed a prospectus supplement registering 5,000,000 shares of Class A common stock pursuant to its Registration Statement on Form S-1. The supplement incorporates the company’s Form 8-K dated May 29, 2026 and notes the last reported NYSE sale price of $24.10 per share on May 28, 2026.

The Form 8-K included in the supplement discloses that Celia Pelaz, Chief Operating Officer, notified the company of her planned resignation effective September 30, 2026. The company does not intend to replace the COO role and has initiated a search for a Chief Commercial Officer. The resignation was stated to be not due to any disagreement with the company.

Insights

Corporate Governance Expert

COO resignation announced with a planned replacement search for a commercial leader.

The filing reports that Celia Pelaz will resign as COO effective September 30, 2026. Management states the departure is not due to disagreement and that the company will not replace the COO role, initiating a search for a Chief Commercial Officer.

Operational continuity depends on the transition plan and the outcome of the CCO search. Subsequent filings may detail interim coverage, succession steps, or compensation arrangements tied to the transition.

Equity Markets / Capital Formation Expert

Prospectus supplement registers 5,000,000 Class A shares; price reference provided.

The supplement registers 5,000,000 shares of Class A common stock under the S-1 registration (cover page). The supplement references a last quoted NYSE sale price of $24.10 on May 28, 2026.

Specific proceeds treatment or offering mechanics are not stated in the excerpt; further prospectus sections or a prospectus supplement would provide allocation, pricing range, and use of proceeds.

Key Figures

Registered shares: 5,000,000 shares Last quoted sale price: $24.10 COO resignation effective date: September 30, 2026

3 metrics

Registered shares 5,000,000 shares Prospectus Supplement No. 3 to Form S-1

Last quoted sale price $24.10 NYSE price on May 28, 2026

COO resignation effective date September 30, 2026 Form 8-K dated May 29, 2026

Key Terms

Prospectus Supplement, Registration Statement on Form S-1, Current Report on Form 8-K, Chief Commercial Officer

4 terms

Prospectus Supplement regulatory

"This prospectus supplement amends and supplements the prospectus dated May 4, 2026"

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 (No. 333-295274)"

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.

Current Report on Form 8-K regulatory

"update and supplement the information in the Prospectus with the information contained in our Current Report on Form 8-K"

A current report on Form 8-K is a document that publicly traded companies file to promptly share important news or events that could affect their financial position or stock price, such as major business changes or legal issues. It helps investors stay informed about timely developments, allowing them to make better decisions about buying or selling shares.

Chief Commercial Officer other

"the Company has initiated a search for a Chief Commercial Officer"

A chief commercial officer (CCO) is the senior executive responsible for a company’s revenue-generating activities, including sales, marketing, pricing, customer relationships and business development. Think of the CCO as the head coach who builds the game plan to win customers and grow sales; their effectiveness affects how fast a company earns money, enters new markets and sustains profits, making the role a key signal for investors about future revenue and competitive strength.

Offering Details

primary

Offering

Offering Type primary

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Spire Global prospectus supplement register?

The supplement registers 5,000,000 shares of Class A common stock. It amends the May 4, 2026 prospectus and incorporates the May 29, 2026 Form 8-K as disclosed in the supplement.

Will Spire Global replace the departing COO?

The company does not currently intend to replace the COO role and has begun a search for a Chief Commercial Officer. The resignation is effective September 30, 2026 as stated in the 8-K.

What reason did Spire Global give for the COO resignation?

The 8-K states the resignation was to pursue a new role with another organization and was not the result of disagreement relating to operations, policies, practices, financial reporting or controls.

What was Spire Global’s last reported share price referenced in the supplement?

The prospectus supplement cites a last reported NYSE sale price of $24.10 per share for Class A common stock on May 28, 2026.

Does the supplement disclose how the 5,000,000 shares will be sold?

The excerpt registers 5,000,000 shares but does not state specific offering mechanics, pricing range, or use of proceeds in the provided text. Additional prospectus pages would contain those details.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/29/2026 - 04:10 PM Learn about SEC filing dates

Filed Pursuant to Rule 424(b)(3)

Registration No. 333-295274

PROSPECTUS SUPPLEMENT NO. 3

(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, filed with the Securities and Exchange Commission on May 29, 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 May 28‚ 2026, the last quoted sale price for our Class A common stock as reported on NYSE was $24.10 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 May 29, 2026

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

FORM 8-K

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 29, 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. ☐

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On May 29, 2026, Celia Pelaz, the Chief Operating Officer of Spire Global, Inc. (the “Company”), informed the Company of her decision to resign from the Company to pursue a new role with another organization effective September 30, 2026. Ms. Pelaz oversaw significant improvements in the Company’s operations, and as a result, the Company does not currently intend to replace Ms. Pelaz as Chief Operating Officer. Instead, consistent with the Company’s 2026 strategic priorities and focus on growth, the Company has initiated a search for a Chief Commercial Officer. Ms. Pelaz’s resignation was not the result of any disagreement relating to the Company’s operations, policies, practices, financial reporting or controls.

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:	May 29, 2026	By:	/s/ Alison Engel
		Name: Title:	Alison Engel Chief Financial Officer