As filed with the Securities and Exchange Commission on December 5, 2025

Registration No. 333-290672

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

PRE-EFFECTIVE AMENDMENT NO. 1

TO

FORM S-3

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

2603 Challenger Tech Court, Suite 100

Orlando, Florida 32826

(407) 382-4003

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Albert Miranda

Chief Financial Officer

LightPath Technologies, Inc.

2603 Challenger Tech Court, Suite 100

Orlando, Florida 32826

(407) 382-4003

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copy to:

Jeffrey E. Decker, Esq.

Suzanne Hanselman, Esq.

Baker & Hostetler LLP

200 South Orange Avenue

Orlando, Florida 32801

(407) 649-4000

Approximate date of commencement of proposed sale to the public: From time to time after this registration statement becomes effective.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box: ☐

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box: ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering: ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. ☐

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

The registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until this registration statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.

EXPLANATORY NOTE

LightPath Technologies, Inc. is filing this Pre-Effective Amendment No. 1 (“Amendment No. 1”) to its Registration Statement on Form S-3 (Registration No. 333-290672) filed with the Securities and Exchange Commission on October 1, 2025, to update the disclosures in the sections titled “Experts” and “Incorporation of Certain Documents by Reference”, and to file auditor consents as Exhibits 23.1, 23.2 and 23.3, respectively.

EXPERTS

The consolidated financial statements of LightPath Technologies, Inc. as of and for the year ended June 30, 2025 incorporated by reference in this Prospectus and in the Registration Statement have been so incorporated in reliance on the report of BDO USA, P.C., an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

The consolidated financial statements of LightPath Technologies, Inc. as of June 30, 2024, and for the year then ended before the effects to retrospectively apply the change in accounting due to the adoption of Accounting Standards Update 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, as discussed in Notes 2 and 17 (the “adjustments”) (not separately included or incorporated by reference in the Prospectus), have been audited by MSL, P.A., formerly an independent registered public accounting firm. The adjustments to those consolidated financial statements have been audited by BDO USA, P.C., an independent registered public accounting firm. The consolidated financial statements as of June 30, 2024, and for the year then ended incorporated by reference in this Prospectus and in the Registration Statement, have been so incorporated in reliance on (i) the report of MSL, P.A. solely with respect to those consolidated financial statements before the effects of the adjustments, and (ii) the report of BDO USA, P.C. solely with respect to the adjustments to those consolidated financial statements, given on the authority of said firms as experts in auditing and accounting.

The financial statements of G5 Infrared, LLC. as of December 31, 2024 and 2023 and for each of the years in the two-year period ended December 31, 2024 have been audited by Elliott Davis, PLLC, an independent registered public accounting firm, as stated in their report thereon, incorporated herein by reference in this Prospectus and Registration Statement by reference to the Company’s Current Report on Form 8-K/A filed on May 2, 2025 in reliance upon such report and upon the authority of such firm as experts in accounting and auditing.

INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

The SEC allows us to “incorporate by reference” information that we file with the SEC, which means that we can disclose important information to you by referring you to those other documents. The information incorporated by reference is an important part of this prospectus supplement and the accompanying base prospectus. In addition to the documents listed below, all documents subsequently filed by us pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act, shall be deemed to be incorporated by reference in this prospectus and to be a part hereof from the date of filing of such documents. Any statement contained in a document that is incorporated by reference in this prospectus supplement is automatically updated and superseded if information contained in this prospectus supplement, or information that we later file with the SEC, modifies or replaces that information. Any statement made in this prospectus supplement concerning the contents of any contract, agreement, or other document is only a summary of the actual contract, agreement, or other document. If we have filed or incorporated by reference any contract, agreement, or other document as an exhibit to the registration statement, you should read the exhibit for a more complete understanding of the document or matter involved. Each statement regarding a contract, agreement, or other document is qualified in its entirety by reference to the actual document.

We incorporate by reference the following documents we filed, excluding any information contained therein or attached as exhibits thereto, which has been furnished to, but not filed with, the SEC:

You may request a copy of these filings, at no cost, by written request to the following address:

LightPath Technologies, Inc.

2603 Challenger Tech Court, Suite 100

Orlando, Florida 32826

Attention: Investor Relations

Item 16. Exhibits.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Orlando, State of Florida, on December 5, 2025.

Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration Statement has been signed below by the following persons in the capacities and on the dates indicated.

Shmuel Rubin, by signing his name below, signs this document on behalf of each of the above named persons specified by an asterisk (*), pursuant to a power of attorney duly executed by such person and filed with the Securities and Exchange Commission in the Registrant’s Registration Statement on December 5, 2025.