Company: XAIR
Filing Date: 2025-09-09
Form Type: 424B3
Source: 0001493152-25-012867
Chunk: 0

Company: Beyond Air, Inc.
Filing Date: 2025-09-09
Form: 424B3
Chunk 0
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Filed pursuant to Rule 424(b)(3)

Registration No. 333-282834

PROSPECTUS SUPPLEMENT

(To Prospectus dated November 26, 2024)

<div align='center'>73,765,634 Shares of Common Stock</div>

This prospectus supplement updates, amends and supplements the prospectus dated November 26, 2024 (the “Prospectus”), which forms a part of our Registration Statement on Form S-3 (Registration No. 333-282834). This prospectus supplement is being filed to update, amend, and supplement the information included in the Prospectus with the information contained in our Current Reports on Form 8-K filed with the SEC on September 9, 2025 (the “Form 8-K”). Accordingly, the Form 8-K is set forth below. Capitalized terms used in this prospectus supplement and not otherwise defined herein shall have the meanings specified in the Prospectus.

This prospectus supplement is not complete without the Prospectus. This prospectus supplement should be read together with the Prospectus, which is to be delivered with this prospectus supplement, and is qualified by reference thereto, except to the extent that the information in this prospectus supplement updates or supersedes the information contained in the Prospectus. 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.

As of September 5, 2025, there were 5,365,224shares of common stock outstanding. Our common stock is listed on the Nasdaq Capital Market under the symbol “XAIR”. On September 5, 2025, the last reported sale price of our common stock on the Nasdaq Capital Market was $2.21 per share.

Except for the financial statements from the Annual Report on Form 10-K for the year ended March 31, 2025, which are incorporated by reference herein, all historical share and per share information in this prospectus supplement gives retroactive effect to a 1-for-20 reverse split of our common stock that became effective on July 14, 2025.

Investing in shares of our common stock involves risks that are described in the “Risk Factors” section beginning on page 4 of the Prospectus and under similar headings in any amendments or supplements to the Prospectus.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of the securities to be issued under the Prospect