SPIRE INC

This summary highlights information contained elsewhere in this proxy statement. This summary does not contain all the information you should consider, and you should read the entire proxy statement carefully before voting.

Who we are

We are a company of people committed to safely and reliably serving the natural gas needs of our customers and communities. This mission, along with our focus on operational excellence and doing what it takes to be an industry-leading natural gas company, is key to our success.

As one of the largest publicly traded natural gas distribution companies in the country, we have the privilege of serving more than 1.7 million homes and businesses, as well as natural gas buyers, producers, and industrial customers through our gas-related businesses. Our core values guide us in our mission and our commitment to serve:

Spire’s fiscal year 2025 corporate performance

The following table provides information on the Company’s performance in the last two fiscal years, which was a critical consideration in the Company’s determination of appropriate executive compensation. For the fiscal year ended September 30, 2025, the Company reported consolidated net income of $271.7 million ($4.37 per diluted share), compared with $250.9 million ($4.19 per diluted share) in fiscal year 2024. The increase of $20.8 million was driven by higher Gas Utility income and continued growth in the Midstream segment. Net income and earnings per share (“EPS”) are determined in accordance with accounting principles generally accepted in the United States of America (“GAAP”).

Management also uses the non-GAAP measure of adjusted earnings and adjusted EPS when internally evaluating and reporting results of operations as discussed on page 26 of the Company’s Annual Report on Form 10-K for the year ended September 30, 2025. Adjusted earnings for fiscal year 2025 was $275.5 million ($4.44 per diluted adjusted earnings per share), up from $247.4 million ($4.13 per diluted adjusted earnings per share) for fiscal year 2024. The incremental $28.1 million reflects the same drivers noted above as adjusted to remove fair value and timing adjustments, as well as acquisition and restructuring activities. The results are discussed further beginning on page 27 of the 2025 Annual Report on Form 10-K.

Our 2025 results

The Company is committed to its pay-for-performance philosophy, which we believe is closely aligned with shareholder interests by linking executive compensation to Company performance. The key metric used to determine funding under our annual incentive plan is adjusted operating income, and the metrics used to determine vesting under our long-term incentive plan are average adjusted EPS and relative total shareholder return. The Company also emphasizes pay-for-performance by placing a majority of the executives’ target total direct compensation (“TTDC”) at risk through the annual and long-term incentive plans. TTDC includes the current base salary, the 2025 target annual incentive plan opportunity and the fair market value of the equity awards made during fiscal year 2025. Further, the value of the equity incentive award, the largest portion of incentive pay, is based on long-term performance.

Sustainability

We issued our seventh annual Sustainability Report in June 2025 for reporting year 2024. This year’s disclosures on environmental, social and governance topics emphasize safety and people, reflecting the current focus of new leadership. We continue to include reporting under the Sustainability Accounting Standards Board standards and increased disclosures aligned with the Task Force on Climate-related Financial Disclosures recommendations. Emissions reporting summarizes reductions from current initiatives as well as new technologies that have potential

to reduce Spire’s emissions in the future. Updated data reporting reflects formats recommended by GRI 2021 Reporting Standards.

In fiscal year 2025, the various committees of the Board of Directors continued formal oversight of management’s sustainability efforts to ensure progress is being made on our sustainability commitments. The corporate governance committee remains responsible for overseeing and approving the Sustainability Report. The current Sustainability Report can be found on our website at SpireEnergy.com/Sustainability.

Annual Meeting of Shareholders

How to vote

Shareholders as of the record date are entitled to vote. Each share of common stock is entitled to one vote for each director nominee and one vote for each of the proposals.

Nominees for election (page 9)

Board highlights

40%

Female directors

Independent directors

Average age

7.8

Average tenure (years)

20%

Ethnically diverse

90%

Independent

— Director breakdown by experience —

Advisory vote to approve the compensation of our named executive officers (page 30)

As we do every year, we are seeking shareholder advisory approval of the compensation of our named executive officers as disclosed in this proxy statement. Although the vote on this proposal is advisory and nonbinding, the compensation and human resources committee and Board will review the results of the vote and consider the collective views of our shareholders in future determinations concerning our executive compensation program.

Ratification of appointment of independent registered public accountant (page 66)

We are asking shareholders to ratify the selection of Deloitte as our independent registered public accountant for fiscal year 2026. The table contains summary information with respect to Deloitte’s fees for services provided in fiscal years 2025 and 2024.