Company: TOMZ
Filing Date: 2025-12-11
Form Type: 424B5
Source: 0001654954-25-013870
Chunk: 1

Company: TOMI Environmental Solutions, Inc.
Filing Date: 2025-12-11
Form: 424B5
Chunk 1
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 shares of our common stock held by non-affiliates and a closing sale price of $0.98 per share as reported on The Nasdaq Capital Market on October 30, 2025. Pursuant to General Instruction I.B.6 of Form S-3, in no event will we sell securities in a public primary offering with a value exceeding more than one-third of our public float in any 12-month period so long as our public float remains below $75.0 million.

We are a “smaller reporting company” as defined under the federal securities laws and, as such, may rely on certain scaled disclosure and reporting requirements.

We are a “smaller reporting company” under applicable federal securities laws and therefore subject to reduced public company reporting requirements. See “Prospectus Supplement Summary—Implications of Being a Smaller Reporting Company.”

Investing in our securities involves a high degree of risk. You should review carefully the risks and uncertainties described under the heading “Risk Factors” contained in this prospectus supplement beginning on page S-8 and under similar headings in the other documents that are filed after the date hereof and incorporated by reference into this prospectus supplement.

Neither the Securities and Exchange Commission (the “ SEC”) nor any state securities commission has approved or disapproved of these securities or determined if this prospectus supplement or the accompanying prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

<div align='center'>The date of this prospectus supplement is December 11, 2025.</div>

<div align='center'>TABLE OF CONTENTS

Prospectus Supplement</div>

|                                                           |     | Page |
| ABOUT THIS PROSPECTUS SUPPLEMENT                          |     | S-3  |
| CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS |     | S-4  |
| PROSPECTUS SUPPLEMENT SUMMARY                             |     | S-5  |
| THE OFFERING                                              |     | S-7  |
| RISK FACTORS                                              |     | S-8  |
| THE HUDSON GLOBAL TRANSACTION                             |     | S-10 |
| USE OF PROCEEDS                                           |     | S-15 |
| DIVIDEND POLICY                                           |     | S-16 |
| DILUTION                                                  |     | S-17 |
| PLAN OF DISTRIBUTION                                      |     | S-18 |
| LEGAL MATTERS                                             |     | S-19 |
| EXPERTS                                                   |     | S-20 |