Prospectus

Summary

• On July 13, 2026, Spire Global's Board approved the appointment of Eric Mellinger as Chief Commercial Officer, effective August 3, 2026.
• Mr. Mellinger, age 61, most recently served as Vice President for Business Development & Growth Leader, Defense & Space Sector, at Mantech International Corporation since April 2025.
• His compensation includes an annual base salary of $385,000 and eligibility for an annual cash bonus targeted at 80% of base salary, prorated for 2026 based on seven months of employment.
• He will receive a grant of 150,000 restricted stock units under the 2021 Equity Incentive Plan on August 3, 2026, with 25% vesting on the first Quarterly Vesting Date in the same calendar quarter as the one year grant anniversary and 1/16th on each Quarterly Vesting Date thereafter over three years.
• His employment agreement provides severance of 100% of base salary and target bonus for a Qualifying Termination outside a Change in Control, rising to 150% during the Change in Control Period, plus up to $15,000 for outplacement services.
• This prospectus supplement, filed under a 5,000,000 share Class A common stock registration, attaches the July 17, 2026 Form 8-K disclosing the appointment.

Why it mattersSpire Global adds a Chief Commercial Officer with defense and space business development experience to lead commercial operations. The filing discloses the executive's compensation and severance terms.