ALTA EQUIPMENT GROUP INC.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No. )

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Alta Equipment Group Inc.

(Name of Registrant as Specified In Its Charter)

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April 15, 2026

Dear Fellow Stockholders,

2025 continued to challenge our industry, our customers, and our business in notable ways as the operating environment remained uneven—shaped by meaningful uncertainty related to tariff and trade policy, interest rate and inflation movements, new federal tax policy, and variability across end markets and geographies. Despite the backdrop, we saw improving trends as the year progressed. Customer activity strengthened, equipment markets began to stabilize, and our teams executed with discipline. We exited the year with better momentum, a clearer operating posture, and a business increasingly aligned around a more focused product portfolio, higher-quality earnings, and long-term value creation.

During the year, we continued to transition the business toward a more durable earnings profile. Revenues declined modestly year over year, driven primarily by lower equipment sales and reduced rental activity. At the same time, our product support business remained stable, reinforcing its role as the most resilient and attractive component of our model. Some of this shift is intentional and strategic as we have been actively reshaping the business to reduce capital intensity, tighten fleet and inventory management, and prioritize parts and service as the core earnings engine. This shift better positions the Company to drive profitability and returns on invested capital as equipment demand and field population utilization begin to improve.

Alta operates in a large, fragmented industry historically dominated by private, family-owned dealership networks built on local relationships, technical expertise, and decades of operating experience. These businesses are essential but often capital constrained and largely inaccessible to public investors. Alta represents a differentiated model—combining permanent capital, professional management, governance and scaled operating discipline with the local execution and customer intimacy that define the best operators in our industry. This positioning supports long-term value creation in a market where capital requirements, OEM expectations, and succession dynamics continue to evolve.

Our operating strategy on local level continues to focus on building density within defined territories anchored by strong OEM relationships. Within each market, we expand deliberately across adjacent products, capabilities and customer segments, increasing our market share and share customer spend throughout the equipment lifecycle. This approach drives deeper customer relationships, improves earnings quality, and strengthens our competitive position over time. As we move forward, execution of the strategy is a top priority.

Our performance reflects the strength of our people. Nearly half of our workforce are technicians—highly skilled professionals who are essential to supporting our customers and sustaining long-term relationships. Guided by our principles—Invest in the Best, Passion for Excellence, Mutual Respect, One Team, and Customers for Life— and our purpose, delivering trust that makes a difference, our team members continue to differentiate Alta in every market we serve.

As we enter 2026, we do so with constructive momentum in each of our major segments, and while the broader environment remains dynamic, we believe Alta’s focused strategy, disciplined operating approach, and commitment to long-term value creation position us to perform across cycles and deliver sustainable value for our shareholders.

On behalf of the entire Alta team, thank you for your continued trust and support.

Sincerely,

Ryan Greenawalt

Chairman of the Board and Chief Executive Officer

2026 PROXY STATEMENT

NOTICE OF 2026 ANNUAL MEETING OF STOCKHOLDERS

On behalf of the Board of Directors, I cordially invite you to attend the 2026 Annual Meeting of Stockholders of Alta Equipment Group Inc. (the “Company”) to be held on May 29, 2026 at 9:30 a.m., Eastern Daylight Time (the “Annual Meeting”). The Annual Meeting will be a completely virtual meeting, which will be conducted via a live audio webcast. You will be able to attend the Annual Meeting online, vote your shares electronically and submit your questions during the Annual Meeting via a live audio webcast by visiting and registering atwww.proxydocs.com/ALTG.

The purpose of the Annual Meeting is to:

elect the three director nominees listed in the accompanying proxy statement;

ratify the appointment of Deloitte & Touche LLP as our independent registered public accounting firm for 2026;

approve, in a non-binding advisory vote, the compensation paid to our named executive officers;

approve the First Amendment to Alta Equipment Group, Inc. 2020 Omnibus Incentive Plan; and

transact any other business that may properly come before the Annual Meeting and any adjournments or postponements thereof.

Only stockholders of record at the close of business on April 2, 2026, may vote at the Annual Meeting. Each stockholder of record is entitled to one vote for each share of common stock held at that time.

Your vote is important to us. Whether or not you plan to attend the Annual Meeting, we strongly urge you to cast your vote promptly. You may vote over the Internet, as well as by telephone or by mail. Please review the instructions on the proxy or voting instruction card regarding each of these voting options.

Important Notice Regarding the Availability of Proxy Materials for the Stockholder Meeting To Be Held on May 29, 2026:

This Proxy Statement and Annual Report to Stockholders, which includes our Annual Report on Form 10-K for the year ended December 31, 2025, are available on or about April 15, 2026 at www.proxydocs.com/ALTG.

By order of the Board of Directors,

/s/ Ryan Greenawalt

Ryan Greenawalt

Chairman of the Board and Chief Executive Officer

April 15, 2026

2026 PROXY STATEMENT

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