# EDGAR Filing Document

**Accession Number:** 0001518461
**File Stem:** 0001493152-25-028818
**Filing Date:** 2025-12
**Character Count:** 101493
**Document Hash:** e980b6d3efc23f2f2b9c4d3610a48af0
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001493152-25-028818.hdr.sgml**: 20251222

**ACCESSION NUMBER**: 0001493152-25-028818

**CONFORMED SUBMISSION TYPE**: POS AM

**PUBLIC DOCUMENT COUNT**: 5

**FILED AS OF DATE**: 20251222

**DATE AS OF CHANGE**: 20251222

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** AmpliTech Group, Inc.
- **CENTRAL INDEX KEY:** 0001518461
- **STANDARD INDUSTRIAL CLASSIFICATION:** COMMUNICATIONS EQUIPMENT, NEC [3669]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 274566352
- **STATE OF INCORPORATION:** NV
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** POS AM
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-255656
- **FILM NUMBER:** 251593485

**BUSINESS ADDRESS:**
- **STREET 1:** 155 PLANT AVENUE
- **CITY:** HAUPPAUGE
- **STATE:** NY
- **ZIP:** 11788
- **BUSINESS PHONE:** 631-521-7831

**MAIL ADDRESS:**
- **STREET 1:** 155 PLANT AVENUE
- **CITY:** HAUPPAUGE
- **STATE:** NY
- **ZIP:** 11788

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** BAYVIEW ACQUISITION CORP
- **DATE OF NAME CHANGE:** 20110418

**As filed with the Securities and Exchange Commission on December 22, 2025**

**Registration Statement No. 333-255656**

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**POST-EFFECTIVE AMENDMENT NO. 1 TO**

**FORM S-3**

**REGISTRATION STATEMENT**

**UNDER**

**THE SECURITIES ACT OF 1933**

**AMPLITECH GROUP, INC.**

(Exact name of registrant as specified in its charter)

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| | |
|:---|:---|
| **Nevada** | **27-4566352** |
| (State or other jurisdiction of<br> incorporation or organization) | (I.R.S. Employer<br> Identification Number) |

---

**155 Plant Avenue**

**Hauppauge, NY 11788**

**(631) 521-7831**

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

**Fawad Maqbool**

**President and Chief Executive Officer**

**AmpliTech Group, Inc.**

**155 Plant Avenue, Hauppauge, NY 11788**

**(631) 521-7831**

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

***Copies to:***

 ****

Daniel B. Eng

Deborah K. Seo

Lewis Brisbois Bisgaard & Smith LLP

45 Fremont Street, Suite 3000

San Francisco, CA 94105

Phone: (415) 362-3580

**From time to time after this Registration Statement becomes effective.**

(Approximate date of commencement of proposed sale to the public)

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 of 1933, 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, or a smaller reporting company. See the definitions of "large accelerated filer," "accelerated filer," and "smaller reporting company" in Rule 12b-2 of the Securities Exchange Act of 1934:

Large accelerated filer ☐ Accelerated filer ☐ <br> Non-accelerated filer ☒ Smaller reporting company ☒ <br> Emerging Growth Company ☐

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 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, as amended, or until the registration statement shall become effective on such date as the Securities and Exchange Commission, acting pursuant to said Section 8(a), may determine.**

**EXPLANATORY NOTE**

This Post-Effective Amendment No. 1 (this "Post-Effective Amendment No. 1") to the Registration Statement on Form S-3 (File No. 333-255656) previously filed with the Securities and Exchange Commission (the "SEC") on April 30, 2021 by the Registrant and declared effective by the SEC on May 11, 2021 (the "Registration Statement") is being filed pursuant to the undertakings in the Registration Statement and for the sole purpose of updating the contents of the prospectus contained in the Registration Statement pursuant to Section 10(a)(3) of the Securities Act of 1933, as amended (the "Securities Act"), in respect of the continuous offering pursuant to Rule 415 of up to 1,900,500 Warrant Shares issuable upon exercise of outstanding warrants, offered by the selling stockholders as previously registered on the Registration Statement.

The Registration Statement registered on a continuous basis 1,900,500 shares of common stock underlying the Warrants. As of the date of this Post-Effective Amendment No. 1, there are 1,900,500 Warrants outstanding. No additional securities are being registered under this Post-Effective Amendment No. 1. All applicable registration fees were paid at the time the Registration Statement was originally filed.

**THE INFORMATION IN THIS PROSPECTUS IS NOT COMPLETE AND MAY BE CHANGED. THESE SECURITIES MAY NOT BE SOLD UNTIL THE REGISTRATION STATEMENT FILED WITH THE SECURITIES AND EXCHANGE COMMISSION IS EFFECTIVE. THIS PRELIMINARY PROSPECTUS IS NOT AN OFFER TO SELL THESE SECURITIES AND WE ARE NOT SOLICITING AN OFFER TO BUY THESE SECURITIES IN ANY STATE WHERE THE OFFER OR SALE IS NOT PERMITTED.**

**PRELIMINARY PROSPECTUS**

**Subject to completion, dated December 22, 2025**

![](formposam_001.jpg)

**1,900,500 Shares of Common Stock**

This prospectus relates to the offer and resale from time to time by the selling stockholders identified in this prospectus of up to an aggregate of 1,900,500 shares (the "Shares") of common stock, par value $0.001 per share of AmpliTech Group, Inc., which are issuable upon exercise of outstanding warrants issued to the selling stockholders (the "Warrants").

The Warrants were acquired by the Selling Stockholders in a private placement on April 16, 2021 pursuant to a Securities Purchase Agreement dated April 15, 2021. The Company agreed to file a registration statement providing for the resale of the shares of common stock issuable upon the exercise of the Warrants. As of the date of this prospectus, the Warrants have an exercise price of $8.48 per share of common stock and will expire five (5) years after their original issuance, or on April 16, 2026. If the Warrants are exercised, we will receive the proceeds from such exercise. Our registration of the Shares does not mean that the selling stockholders will sell any of the securities offered hereby.

The selling stockholders may sell common stock from time to time in the principal market on which the stock is traded at the prevailing market price or in negotiated transactions. We will not receive any of the proceeds from the sale of common stock by the selling stockholders. We will pay the expenses of registering these Shares.

There is no established trading market for the Warrants and we do not expect a market to develop. In addition, the Warrants are not listed on any national securities exchange or any other nationally recognized trading system. Our common stock and Public Warrants are listed on the Nasdaq Capital Market and trade under the symbols "AMPG" and "AMPGW" respectively. The last reported sale price of our Common Stock and Public Warrants on the Nasdaq Capital Market on December 19, 2025, was $3.07 per share and $0.16 per Public Warrant, respectively.

We are a "smaller reporting company" as defined under the federal securities laws and, as such, have elected to comply with certain reduced reporting requirements for this prospectus and may elect to do so in future filings.

**Our business and an investment in our common stock involve a high degree of risk. Before making any investment in our common stock, you should read and carefully consider risks described in the "Risk Factors" section on page 5 of this prospectus.**

**Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of the common stock offered hereby or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.**

This prospectus is dated _________.

**TABLE OF CONTENTS**

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| | |
|:---|:---|
|  | **Page** |
| [PROSPECTUS SUMMARY](#me_001) | 1 |
| [THE OFFERING](#me_002) | 4 |
| [RISK FACTORS](#me_003) | 5 |
| [CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS](#me_004) | 5 |
| [USE OF PROCEEDS](#me_005) | 5 |
| [DESCRIPTION OF SECURITIES](#me_006) | 6 |
| [SELLING STOCKHOLDERS](#me_007) | 9 |
| [PLAN OF DISTRIBUTION](#me_008) | 10 |
| [LEGAL MATTERS](#me_009) | 11 |
| [EXPERTS](#me_010) | 11 |
| [WHERE YOU CAN FIND MORE INFORMATION](#me_011) | 12 |
| [INCORPORATION OF CERTAIN INFORMATION BY REFERENCE](#me_012) | 12 |

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Unless otherwise stated or the context otherwise requires, the terms "AmpliTech" "we," "us," "our" and the "Company" refer to AmpliTech Group, Inc., a Nevada corporation, and its consolidated subsidiaries.

**You should rely only on the information contained in this prospectus that we may provide to you in connection with this offering. We have not authorized anyone to provide you with additional or different information. If anyone provides you with different or inconsistent information, you should not rely on it. This prospectus does not constitute an offer to sell or a solicitation of an offer to buy any securities other than the common stock offered by this prospectus. This prospectus does not constitute an offer to sell or a solicitation of an offer to buy any common stock in any circumstances in which such offer or solicitation is unlawful or not permitted. You should assume that the information appearing in this prospectus is accurate only as of the date on the front cover of this prospectus, regardless of the time of delivery of this prospectus or of any sale of our securities in this offering. Our business, financial condition, results of operations and prospects may have changed since that date.**

**No action is being taken in any jurisdiction outside the United States to permit a public offering of our securities or possession or distribution of this prospectus in that jurisdiction. Persons who come into possession of this prospectus in jurisdictions outside the United States are required to inform themselves about and to observe any restrictions as to this offering and the distribution of this prospectus applicable to that jurisdiction.**

**PROSPECTUS SUMMARY**

*This summary contains basic information about us and this offering. Because it is a summary, it does not contain all of the information that you should consider before deciding to invest in our securities. Before you decide to invest in our securities, you should read this entire prospectus carefully, any related free writing prospectus that we have authorized for use in connection with the offering and the documents incorporated by reference herein, including the information under the heading "Risk Factors."*

**Overview**

AmpliTech Group Inc. ("AMPG," "AmpliTech" or the "Company"), incorporated in 2010 in the state of Nevada, is the parent company of AmpliTech, Inc., and the Company's divisions, Specialty Microwave, Spectrum Semiconductor Materials, AmpliTech Group MMIC Design Center ("AGMDC") and AmpliTech Group True G Speed Services ("AGTGSS").

AmpliTech, Inc. designs, engineers and assembles micro-wave component-based amplifiers that meet individual customer specifications. Our products consist of Radio Frequency ("RF") amplifiers and related subsystems, operating at multiple frequencies from 50kHz to 44GHz, including low noise amplifiers ("LNA"), medium power amplifiers, cryogenic amplifiers, and custom assembly designs for the global satellite communications, telecom (5G & IoT), space, defense, and quantum computing markets. We also offer non-recurring engineering services on a project-by-project basis, for a predetermined fixed contractual amount, or on a time plus material basis. We have both domestic and international customers in such industries as aerospace, governmental, defense and commercial satellite.

Specialty Microwave designs and manufactures state-of- the-art precision SATCOM microwave components, RF subsystems and specialized electronic assemblies for the military and commercial markets, flexible and rugged waveguides, wave guide adapters and more.

On December 15, 2021, we acquired substantially all of the assets of Spectrum Semiconductor Materials Inc. ("SSM"), a globally authorized distributor of integrated circuit (IC) packaging and lids for semiconductor device assembly, prototyping, testing, and production requirements founded in 1990 and headquartered in San Jose, CA.

In 2021, the Company opened AGMDC, a monolithic microwave integrated circuits ("MMIC") chip design center, in Texas and has started to implement several of its proprietary amplifier designs into MMIC components. MMICs are semiconductor chips used in high-frequency communications applications. MMICs are widely desired for power amplification solutions to service emerging technologies, such as phased array antennas and quantum computing. MMICs carry a smaller footprint enabling them to be incorporated into a broader array of systems while reducing costs. AGMDC designs, develops and manufactures state-of-the-art signal processing components for satellite and 5G communications networks, defense, space and other commercial applications, allowing the Company to market its products to wider base of customers requiring high technology in smaller packages.

In August 2022, we formed our AGTGSS division to enable "true G speeds" to the industry. AGTGSS' main function will be to plan and configure 5G radio systems and make them O-RAN compliant. AGTGSS will implement AmpliTech's low noise amplifier devices in these systems to promote greater coverage, longer range and faster speeds.

On March 26, 2025, we entered into an asset purchase agreement, Titan Crest, LLC, a Delaware limited liability company ("Titan"), and its affiliate, to purchase certain assets including intellectual property used in developing, manufacturing, marketing and selling products that use radio frequency technology ("5G ORAN radio products).

Our mission is to patent our proprietary IP and trade secrets that were used in small volume niche markets and expand our capabilities through strategic partnerships, joint ventures, mergers/acquisitions with key industry leaders in the 5G/6G, quantum computing, and cybersecurity markets. We believe this will enable us to scale up our products and revenue by developing full systems and subsystems with our unique technology as a core component, which we expect will position us as a global leader in these rapidly emerging technology sectors and addresses large volume markets as well, such as cellphone handsets, laptops, server networks, and many other applications that improve everyday quality of life.

The Company's research and development initiative to expand its product line of low noise amplifiers to include its new 5G and wireless infrastructure products, cryogenic amplifiers and MMIC designs is progressing significantly. Our combined engineering and manufacturing resources are expected to complement the development of new subsystems for satellite, wireless, and 5G infrastructures, as well as advanced military and commercial markets.

**Our Corporate History and Structure**

AmpliTech Group Inc. was incorporated under the laws of the State of Nevada on December 30, 2010. On August 13, 2012, the Company acquired AmpliTech Inc., by issuing 833,750 shares of the Company's common stock to the shareholders of AmpliTech Inc. in exchange for 100% of the outstanding shares of AmpliTech Inc. (the "Share Exchange"). After the Share Exchange, the selling shareholders owned 60,000 shares of the outstanding 893,750 shares of Company common stock, resulting in a change in control. Accordingly, the transaction was accounted for as a reverse acquisition in which AmpliTech, Inc. was deemed to be the accounting acquirer, and the operations of the Company were consolidated for accounting purposes.

AmpliTech designs, engineers and assembles microwave component based low noise amplifiers ("LNA") that meet individual customer specifications. Application of the Company's proprietary technology results in maximum frequency gain with minimal background noise distortion as required by each customer. The Company has both domestic and international customers in such industries as aerospace, governmental, defense and commercial satellite.

On September 12, 2019, AmpliTech Group Inc. acquired substantially all of the assets of Specialty Microwave Corporation, a privately held company based in Ronkonkoma, NY. The purchase included all inventory, orders, customers, property and equipment, and goodwill. Following the closing of the asset purchase, we hired all eight team members of SMW. In connection with the acquisition, the Company began using the trade name "Specialty Microwave". Specialty designs and manufactures passive microwave components and related subsystems that meet individual customer specifications for both domestic and international customers for use in satellite communication ground networks.

On February 17, 2021, AmpliTech Group Inc.'s common stock and Public Warrants commenced trading on NASDAQ under the symbols "AMPG" and "AMPGW," respectively. A reverse split of the outstanding common stock at a 1-for-20 ratio became effective February 17, 2021, as of 12:01 a.m., Eastern Time. All share amounts have been retroactively re-stated to reflect the reverse split.

On November 19, 2021, AmpliTech Group, Inc. entered into an Asset Purchase Agreement with SSM, pursuant to which AmpliTech would acquire substantially all of the assets of SSM. SSM, located in Silicon Valley (San Jose, CA), was a global authorized distributor of IC packaging and lids for semiconductor device assembly, prototyping, testing, and production requirements. The acquisition was completed on December 15, 2021.

In 2021, the Company opened a MMIC chip design center in Texas and has started to implement several of its proprietary amplifier designs into MMIC components. MMICs are semiconductor chips used in high-frequency communications applications. MMICs are widely desired for power amplification solutions to service emerging technologies, such as phased array antennas and quantum computing. MMICs carry a smaller footprint enabling them to be incorporated into a broader array of systems while reducing costs. AGMDC designs, develops and manufactures state-of-the-art signal processing components for satellite and 5G communications networks, defense, space and other commercial applications, allowing the Company to market its products to a wider base of customers requiring high technology in smaller packages.

In August 2022, our AGTGSS division was founded to serve and provide complete system integration and ORAN compliant O-RU's (Radio Units) for telcos, enabling the industry to access 'True 5G Speeds'. AGTGSS provides Managed Services, Cyber Security, Cloud Services, Data Sciences and Telco Cloud Services. AGTGSS will also be providing full installation of Private 5G Networks (P5G) which includes the deployment of AmpliTech Group developed radio units. AGTGSS will implement AmpliTech's low noise amplifier devices in these systems to promote greater coverage, longer range and faster speeds.

On March 26, 2025, we entered into an asset purchase agreement, as amended by that certain amendment dated April 15, 2025, with Titan, and its affiliate (as amended, the "Titan APA") to purchase certain assets including intellectual property used in developing, manufacturing, marketing and selling products that use radio frequency technology ("5G ORAN radio products). The aggregate purchase price for the assets is $8,000,000, which consists of $4,000,000 in cash and $4,000,000 in restricted shares of common stock of which the first $3,500,000 in cash was paid and $1,500,000 in restricted common stock was issued on April 24, 2025. The remaining $500,000 in cash to be paid and $2,500,000 in shares of restricted common stock will be issued to Titan upon the transfer of the 5G ORAN radio products' technology and intellectual property rights by Titan to the Company. The second milestone is expected to be achieved towards the end of the year 2025.

**Recent Developments**

 ****

***Amendment to Amended and Restated 2020 Equity Incentive Plan***

On October 1, 2025, the Company's Board unanimously approved, an Amendment to the Amended and Restated 2020 Equity Incentive Plan ("Amended and Restated Plan") to increase the number of shares subject to the Amended and Restated Plan by an additional 2,800,000. On December 10, 2025 at the 2025 Annual Meeting of Stockholders, such Amendment was approved by the stockholders. As of December 19, 2025, the total number of awards subject to the Amended and Restated Plan and available for issuance is 3,473,392.

On October 30, 2025, the Company entered into a dealer manager agreement with Moody Capital Solutions, Inc. (the "Dealer-Manager") in connection with a rights offering (the "Rights Offering") pursuant to which the Company will distribute to the holders of record of its common stock, $0.001 par value ("Common Stock") and certain eligible warrantholders who have contractual rights to participate in the Rights Offering, at no charge, two transferable unit subscription rights (the "Unit Subscription Rights") for each share of the Company's Common Stock beneficially owned or subject to eligible warrants as of November 10, 2025. Each Unit Subscription Right entitles the registered holder to purchase a Unit at $4.00 with each Unit consisting of one share of Common Stock, one Series A Right to purchase one share of Common Stock at an exercise price of $5.00 (the "Series A Right") and one Series B Right to purchase one share of Common Stock at an exercise price of $6.00 (the Series B Right, and together with the Series A Right, the "Series Rights"), subject to the maximum Unit issuance limitation of 8,000,000 in the aggregate and potential pro-rata adjustments. Record Holders who fully exercise their Unit Subscription Rights will be entitled to subscribe, subject to certain limitations and subject to potential pro-rata adjustment, for additional Units covered by any unexercised Unit Subscription Rights. Each Unit will consist of one share of Common Stock, one series A right to purchase one share of Common Stock for $5.00 (a "Series A Right") and one series B right to purchase one share of Common Stock for $6.00 (a "Series B Right" and, collectively with the Series A Right, the "Series Rights"). The Common Stock and the Series Rights comprising the Units may only be purchased as a Unit but will be issued separately. The initial expiration date to exercise the unit subscription right was extended from December 10, 2025 to January 9, 2026. The Series A Rights and Series B Rights may be exercised commencing on their date of issuance and continuing until their expiration dates, respectively, July 18, 2026 and November 20, 2026.

***Rights Offering***

We have agreed to pay the Dealer-Manager a cash fee equal to 7.0% of the proceeds of the Rights Offering from the exercise of the Unit Subscription Rights and the Series Rights; provided however, if the aggregate subscription proceeds equal more than $10 million but less than $20 million, we have agreed to pay the Dealer-Manager a cash fee equal to 6.0%; provided further, if the aggregate subscription proceeds equal less than $10 million, we have agreed to pay the Dealer-Manager a cash fee equal to 5.0%. We also paid the Dealer-Manager an out-of-pocket accountable expense allowance of $35,000.

In connection with the Rights Offering, the Company entered into a Subscription Agent and Rights Agent Agreement, dated October 30, 2025, with VStock Transfer, LLC to provide subscription agent services for the Unit Subscription Rights and Series Rights with respect to the Rights Offering.

***Independent Director Stock Issuance***

On December 12, 2025, pursuant to the director agreement entered into with each of our independent directors in January 2025, our Board granted 15,000 shares of our common stock to each of our independent director as compensation for their services.

**Background on Warrants**

On April 15, 2021, we entered into a securities purchase agreement ("Purchase Agreement") with certain institutional investors for the sale of an aggregate of 2,715,000 shares of common stock at a purchase price of $8.48 per share in a registered direct offering.

In a concurrent private placement, the Company sold to the investors, warrants to purchase an aggregate of 1,900,500 shares of common stock at an exercise price of $8.48 per share with a five year term. The exercise price of the Warrants and the number of shares of the common stock issuable upon the exercise of the Warrants are subject to adjustment in the event of any stock dividends and splits, reverse stock split, recapitalization, reorganization or similar transaction, as described in the Warrants. The Warrants are exercisable on a "cashless" basis in certain circumstances. The Company agreed to file a registration statement providing for the resale of the shares of common stock issuable upon the exercise of the Warrants. Upon effectiveness of such registration statement, the Warrants will not exercisable on cashless basis. The closing of the sale of the shares of common stock in the registered direct offering, and the sale of the Warrants in the concurrent private placement, occurred on April 16, 2021.

**About this Offering**

This prospectus relates to the offer and resale of up to 1,900,500 shares of common stock from time to time by the selling stockholders, which shares are issuable upon exercise of the Warrants issued in a private placement pursuant to the Purchase Agreement.

**Implications of Being a Smaller Reporting Company**

We are a "smaller reporting company" meaning that the market value of our common stock held by non-affiliates is less than $250.0 million measured on the last business day of our most recent second fiscal quarter or our annual revenue is less than $100.0 million during the most recent completed fiscal year and the market value of our common stock held by non-affiliates is less than $700.0 million measured on the last business day of our most recent second fiscal quarter. Accordingly, we may provide less public disclosure than larger public companies, including the inclusion of only two years of audited financial statements and only two years of management discussion and analysis of financial condition and results of operations disclosure. As a result, the information that we provide to our stockholders may be different than what you might receive from other public reporting companies in which you hold equity interests.

**THE OFFERING**

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| | |
|:---|:---|
| **Common stock outstanding** | 20,683,095 shares <sup>(1)</sup> |
| **Shares of Common Stock that may be offered and sold from time to time by the selling stockholders named herein** | Up to 1,900,500 shares of common stock issuable upon the exercise of outstanding Warrants. |
| **Description of Warrants** | The Warrants have an exercise price of $8.48 per share and expire April 16, 2026 |
| **Use of proceeds** | We will not receive any of the proceeds from the sale of the Resale Shares by the selling stockholders.<br>The gross proceeds if all the holders of the Warrants, as of the date of this prospectus, exercise their Warrants for cash will be approximately $16.1 million; however, we are unable to predict the timing or amount of potential Warrant exercises. Accordingly, all such proceeds will be used for working capital and other general corporate purposes. There is no assurance that any of the Warrants may be exercised at all. |
| **Nasdaq symbols** | There is no established trading market for the Warrants and we do not expect a market to develop. In addition, the Warrants are not listed on any national securities exchange or any other nationally recognized trading system.<br>Our common stock and the Public Warrants are listed on the Nasdaq Capital Market under the symbols "AMPG" and "AMPGW," respectively. |
| **Risk factors** | You should carefully consider the information set forth in this prospectus and, in particular, the specific factors set forth in the "Risk Factors" section in the Form 10-K and subsequently filed Quarterly Reports on Form 10-Q incorporated herein by reference before deciding whether or not to invest in common stock. |

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(1) As
 of December 19, 2025, we had 20,683,095 shares of common stock outstanding. This number excludes the following:

● 1,263,125 shares of common stock issuable upon exercise of stock options granted under the Amended and Restated 2020 Equity Plan ("Equity Plan"), which are outstanding as of December 19, 2025 and subject to vesting and of which have a weighted-average exercise price of $2.30;

● 3,473,392 shares of common stock reserved for future issuance under the Equity Plan;

● 3,296,942 shares of common stock issuable upon the exercise of the warrants outstanding (which includes the Warrants) as of December 19, 2025, at a weighted average exercise price of $7.83 per share; and

● shares of common stock that may be issued in connection with the Rights Offering.

**RISK FACTORS**

An investment in our common stock involves a high degree of risk. You should carefully consider the risks set forth under the section captioned "Risk Factors" contained in our Annual Report on Form 10-K for the year ended December 31, 2024, which is incorporated by reference into this prospectus, and in the other reports that we file with the SEC and incorporate by reference into this prospectus, before deciding to invest in our common stock. The risks and uncertainties we have described are not the only ones we face.

If any of the events described in these risk factors actually occurs, or if additional risks and uncertainties that are not presently known to us or that we currently deem immaterial later materialize, then our business, prospects, results of operations and financial condition could be materially adversely affected. In that event, the trading price of our securities could decline, and you may lose all or part of your investment in our securities. The risks discussed include forward-looking statements, and our actual results may differ substantially from those discussed in these forward-looking statements. See "Cautionary Note Regarding Forward-Looking Statements."

**CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS**

Forward-looking statements are neither historical facts nor assurances of future performance. Instead, they are based only on our current beliefs, expectations and assumptions regarding the future of our business, future plans and strategies, projections, anticipated events and trends, the economy and other future conditions. Because forward-looking statements relate to the future, they are subject to inherent uncertainties, risks and changes in circumstances that are difficult to predict and many of which are outside of our control. Our actual results and financial condition may differ materially from those indicated in the forward-looking statements. Therefore, you should not rely on any of these forward-looking statements.

Any forward-looking statement made by us in this prospectus is based only on information currently available to us and speaks only as of the date on which it is made. We undertake no obligation to publicly update any forward-looking statement, whether written or oral that may be made from time to time, whether as a result of new information, future developments or otherwise, except as may be required under applicable law. We anticipate that subsequent events and developments will cause our views to change. You should read this prospectus and the documents filed as exhibits to the registration statement, of which this prospectus is a part, completely and with the understanding that our actual future results may be materially different from what we expect. Our forward-looking statements do not reflect the potential impact of any future acquisitions, merger, dispositions, joint ventures or investments we may undertake. We qualify all of our forward-looking statements by these cautionary statements.

**USE OF PROCEEDS**

This prospectus relates to offer and resale of the Shares from time to time by the selling stockholders. We will not receive any of the proceeds resulting from the sale of common stock by the selling stockholders. However, we will receive gross proceeds of up to $16.1 million from the cash exercise of the warrants by the selling stockholders, if any. We currently intend to use the net proceeds from the sale of our securities offered under this prospectus for working capital and general corporate purposes. Pending any specific application, we may initially invest funds in short-term marketable. There is no assurance that any of the Warrants will ever be exercised.

**DESCRIPTION OF SECURITIES**

This description is intended as a summary, and is qualified in its entirety by reference to our amended and restated articles of incorporation, as amended (the "Articles of Incorporation") and amended and restated by-laws ("Bylaws"), which are incorporated by reference to the registration statement of which this prospectus forms a part. You should also refer to our Articles of Incorporation and Bylaws, which have been filed with the SEC as exhibits to the registration statement of which this prospectus forms a part.

**Authorized and Outstanding Capital Stock**

Our authorized capital stock consists of 500,000,000 shares of common stock, $0.001 par value per share, and 1,000,000 shares of blank check preferred stock, $0.001 par value per share. As of December 19, 2025, there were 20,683,095 shares of common stock and no shares of preferred stock outstanding.

**Common Stock**

Holders of our common stock are entitled to one vote for each share held of record on all matters submitted to a vote of the stockholders, and do not have cumulative voting rights. Subject to preferences that may be applicable to any outstanding shares of preferred stock, holders of common stock are entitled to receive ratably such dividends, if any, as may be declared from time to time by our Board of Directors out of funds legally available for dividend payments. All outstanding shares of common stock are fully paid and non-assessable, and the shares of common stock to be issued upon completion of this offering will be fully paid and non-assessable. The holders of common stock have no preferences or rights of cumulative voting, conversion, or pre-emptive or other subscription rights. There is no redemption or sinking fund provisions applicable to the common stock. In the event of any liquidation, dissolution or winding up of our affairs, holders of common stock will be entitled to share ratably in any of our assets remaining after payment or provision for payment of all of our debts and obligations and after liquidation payments to holders of outstanding shares of preferred stock, if any.

***Exchange Listing***

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Our common stock and Public Warrants are listed on Nasdaq under the symbol "AMPG" and "AMPGW," respectively.

***Transfer Agent and Registrar***

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The transfer agent and registrar for our common stock is VStock Transfer LLC.

**Preferred Stock**

The Board generally will be authorized, without further stockholder approval, to issue from time to time up to an aggregate of 1,000,000 shares of preferred stock, in one or more series. Each series of preferred stock will have the number of shares, designations, preferences, voting powers (or special, preferential or no voting powers), relative, participating, optional or other special rights and privileges and such qualifications, limitations or restrictions as is determined by the Board, which may include, among others, the right to provide that the shares of each such series may be: (i) subject to redemption at such time or times and at such price or prices; (ii) entitled to receive dividends (which may be cumulative or non-cumulative) at such rates, on such conditions, and at such times, and payable in preference to, or in such relation to, the dividends payable on any other class or classes or any other series; (iii) entitled to such rights upon the dissolution of, or upon any distribution of the assets of, the Company; (iv) convertible into, or exchangeable for, shares of any other class or classes of stock, or of any other series of the same or any other class or classes of stock of the Company at such price or prices or at such rates of exchange and with such adjustments, if any; or (v) entitled to the benefit of such limitations, if any, on the issuance of additional shares of such series or shares of any other series of preferred stock.

Our stockholders have granted the Board authority to issue the preferred stock and to determine the rights and preferences of the preferred stock in order to eliminate delays associated with a stockholder vote on specific issuances. The rights of the holders of common stock will be subordinate to the rights of holders of any preferred stock issued in the future. The issuance of preferred stock, while providing desirable flexibility in connection with possible acquisitions and other corporate purposes, could adversely affect the voting power or other rights of the holders of common stock, and could make it more difficult for a third party to acquire, or discourage a third party from attempting to acquire, a majority of our outstanding voting stock.

**Anti-Takeover Effects of Some Provisions of Nevada Law**

The following provisions of the Nevada Revised Statutes ("NRS") could, if applicable, have the effect of discouraging takeovers of our Company.

*Transactions with Interested Stockholders.* The NRS prohibits a publicly traded Nevada company from engaging in any business combination with an interested stockholder for a period of three years following the date that the stockholder became an interested stockholder unless, prior to that date, the Board of Directors of the corporation approved either the business combination itself or the transaction that resulted in the stockholder becoming an interested stockholder.

An "interested stockholder" is defined as any entity or person beneficially owning, directly or indirectly, 10% or more of the outstanding voting stock of the corporation and any entity or person affiliated with, controlling, or controlled by any of these entities or persons. The definition of "business combination" is sufficiently broad to cover virtually any type of transaction that would allow a potential acquirer to use the corporation's assets to finance the acquisition or otherwise benefit its own interests rather than the interests of the corporation and its stockholders.

In addition, business combinations that are not approved and therefore take place after the three year waiting period may also be prohibited unless approved by the board of directors and stockholders or the price to be paid by the interested stockholder is equal to the highest of (i) the highest price per share paid by the interested stockholder within the 3 years immediately preceding the date of the announcement of the business combination or in the transaction in which he or she became an interested stockholder, whichever is higher; (ii) the market value per common share on the date of announcement of the business combination or the date the interested stockholder acquired the shares, whichever is higher; or (iii) if higher for the holders of preferred stock, the highest liquidation value of the preferred stock.

*Acquisition of a Controlling Interest.* The NRS contains provisions governing the acquisition of a "controlling interest" and provides generally that any person that acquires 20% or more of the outstanding voting shares of an "issuing corporation," defined as Nevada corporation that has 200 or more stockholders at least 100 of whom are Nevada residents (as set forth in the corporation's stock ledger); and does business in Nevada directly or through an affiliated corporation, may be denied voting rights with respect to the acquired shares, unless a majority of the disinterested stockholder of the corporation elects to restore such voting rights in whole or in part.

The statute focuses on the acquisition of a "controlling interest" defined as the ownership of outstanding shares sufficient, but for the control share law, to enable the acquiring person, directly or indirectly and individually or in association with others, to exercise (i) one-fifth or more, but less than one-third; (ii) one-third or more, but less than a majority; or (iii) a majority or more of the voting power of the corporation in the election of directors.

The question of whether or not to confer voting rights may only be considered once by the stockholders and once a decision is made, it cannot be revisited. In addition, unless a corporation's articles of incorporation or bylaws provide otherwise (i) acquired voting securities are redeemable in whole or in part by the issuing corporation at the average price paid for the securities within 30 days if the acquiring person has not given a timely information statement to the issuing corporation or if the stockholders vote not to grant voting rights to the acquiring person's securities; and (ii) if voting rights are granted to the acquiring person, then any stockholder who voted against the grant of voting rights may demand purchase from the issuing corporation, at fair value, of all or any portion of their securities.

The provisions of this section do not apply to acquisitions made pursuant to the laws of descent and distribution, the enforcement of a judgment, or the satisfaction of a security interest, or acquisitions made in connection with certain mergers or reorganizations.

**Warrants**

The following summary of certain terms and provisions of the Warrants exercisable for the common stock offered hereby is not complete and is subject to, and qualified in its entirety by, the provisions of the form of Warrant, which is filed as an exhibit to the registration statement of which this prospectus is a part.

*Exercisability*. The Warrants are exercisable at any time after their original issuance and at any time up to April 16, 2026. The Warrants may be exercised upon surrender of the warrant certificate on or prior to the expiration date at the offices of the Company, with the exercise form on the reverse side of the warrant certificate completed and executed as indicated, accompanied by full payment of the exercise price, by certified or official bank check payable to us, for the number of Warrants being exercised. If we fail to maintain the effectiveness of the registration statement and current prospectus relating to the common stock issuable upon exercise of the Warrants, the holders of the Warrants shall have the right to exercise the Warrants solely via a cashless exercise feature provided for in the Warrants, until such time as there is an effective registration statement and current prospectus.

*Exercise Limitation*. A holder may not exercise any portion of a Warrant to the extent that the holder, together with its affiliates and any other person or entity acting as a group, would own more than 4.99% of the outstanding common stock after exercise, as such percentage ownership is determined in accordance with the terms of the Warrant, except that upon prior notice from the holder to us, the holder may waive such limitation up to a percentage not in excess of 9.99%.

*Exercise Price*. The exercise price per whole share of common stock purchasable upon exercise of the Warrants is $8.48 per share. The exercise price is subject to appropriate adjustment in the event of certain stock dividends and distributions, stock splits, stock combinations, reclassifications or similar events affecting our common stock and also upon any distributions of assets, including cash, stock or other property to our stockholders.

*Fractional Shares*. No fractional shares of common stock will be issued upon exercise of the Warrants. If, upon exercise of the Warrant, a holder would be entitled to receive a fractional interest in a share, we will, upon exercise, pay a cash adjustment in respect of such fraction in an amount equal to such fraction multiplied by the exercise price. If multiple Warrants are exercised by the holder at the same time, we shall pay a cash adjustment in respect of such final fraction in an amount equal to such fraction multiplied by the exercise price.

*Transferability*. The Warrants are subject to certain transfer restriction. Warrants may only be transferred pursuant to the terms of the Warrant.

*Exchange Listing*. There is no established trading market for the Warrants and we do not expect a market to develop. In addition, the Warrants are not listed on any national securities exchange or any other nationally recognized trading system.

*Fundamental Transactions*. In the event of a fundamental transaction, as described in the Warrants and generally including any reorganization, recapitalization or reclassification of our common stock, the sale, transfer or other disposition of all or substantially all of our properties or assets, our consolidation or merger with or into another person, the acquisition of more than 50% of our outstanding common stock, or any person or group becoming the beneficial owner of 50% of the voting power represented by our outstanding common stock, the holders of the Warrants will be entitled to receive the kind and amount of securities, cash or other property that the holders would have received had they exercised the warrants immediately prior to such fundamental transaction.

*Rights as a Stockholder*. The Warrant holders do not have the rights or privileges of holders of common stock or any voting rights until they exercise their Warrants and receive shares of common stock. After the issuance of shares of common stock upon exercise of the Warrants, each holder will be entitled to one vote for each share held of record on all matters to be voted on by stockholders.

*Governing Law*. The Warrants are governed by New York law.

**SELLING STOCKHOLDERS**

This prospectus relates to the offering by the selling stockholders of up to 1,900,500 shares of common stock by the selling stockholders from time to time, which are issuable upon exercise of outstanding warrants.

The following table sets forth, based on the initial information provided to us on April 16, 2021, by the selling stockholders or known to us, the name of each selling stockholder, the number of shares offered by each selling stockholder, the number of shares of our common stock beneficially owned by the selling stockholder before this offering, and the number and percentage of shares of our common stock beneficially owned by the selling stockholder after the offering. The number of shares owned are those beneficially owned, as determined under the rules of the Securities and Exchange Commission (the "SEC"), and the information is not necessarily indicative of beneficial ownership for any other purpose. Under these rules, beneficial ownership includes any shares of common stock as to which a person has sole or shared voting power or investment power and any shares of common stock which the person has the right to acquire within 60 days through the exercise of any option, warrant or right, through conversion of any security or pursuant to the automatic termination of a power of attorney or revocation of a trust, discretionary account or similar arrangement. To our knowledge, except as set forth below, none of the selling stockholders is a broker-dealer or an affiliate of a broker-dealer. None of the selling stockholders has had any position, office or other material relationship, within the past three years, with us or with any of our predecessors or affiliates. The information provided below may have subsequently changed since it represents information provide to us on or around April 16, 2021.

We have assumed all shares of common stock reflected on the table will be sold from time to time in the offering covered by this prospectus. Because the selling stockholders may offer all or any portions of the shares of common stock listed in the table below, no estimate can be given as to the amount of those shares of common stock covered by this prospectus that will be held by the selling stockholders upon the termination of the offering.

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| | | | | | |
|:---|:---|:---|:---|:---|:---|
| **Selling Stockholder** | **Number of Shares Beneficially Owned Before Offering** |  | **Number of Shares Offered <sup>(1)</sup>** | **Number of Shares Beneficially Owned After Offering** | **Percentage of Shares Beneficially Owned After Offering (2)** |
| 3i LP <sup>(3)</sup> | 163568 |  | 63000 | 100568 | \* |
| Alto Opportunity Master Fund, SPC—Segregated Master Portfolio B<sup>(4)</sup> | 140000 |  | 140000 |  |  |
| Armistice Capital Master Fund Ltd.<sup>(5)</sup> | 420000 |  | 420000 |  |  |
| Bakay Capital Fund, LP<sup>(7)</sup> | 106769 |  | 38500 | 68269 | \* |
| Bigger Capital Fund, LP<sup>(8)</sup> | 148750 |  | 61250 | 87500 | \* |
| BPY Limited<sup>(9)</sup> | 38529 |  | 25200 | 13329 | \* |
| Connective Capital Emerging Energy QP, LP<sup>(10)</sup> | 59282 |  | 24410 | 34872 | \* |
| Connective Capital I QP, LP <sup>(10)</sup> | 25718 |  | 10590 | 15128 | \* |
| CVI Investments, Inc.<sup>(11)</sup> | 104814 |  | 52500 | 52314 | \* |
| District 2 Capital Fund LP<sup>(8)</sup> | 148750 |  | 61250 | 87500 | \* |
| Empery Asset Master, LTD<sup>(12)</sup> | 179631 |  | 103502 | 76129 | \* |
| Empery Tax Efficient, LP <sup>(13)</sup> | 49813 |  | 29708 | 20105 | \* |
| Empery Tax Efficient III, LP<sup>(14)</sup> | 70556 |  | 41790 | 28766 | \* |
| Hudson Bay Master Fund Ltd.<sup>(15)</sup> | 87500 |  | 87500 |  |  |
| Intracoastal Capital, LLC<sup>(16)</sup> | 521567 |  | 297500 | 224067 | \* |
| L1 Capital Global Opportunities Master Fund<sup>(17)</sup> | 70000 |  | 70000 |  |  |
| Lind Global Macro Fund, LP<sup>(18)</sup> | 70700 |  | 63000 | 7700 | \* |
| Nomis Bay Ltd<sup>(9)</sup> | 57794 |  | 37800 | 19994 | \* |
| S.H.N. Financial Investments LTD<sup>(19)</sup> | 63000 |  | 63000 |  |  |
| Sabby Volatility Warrant Master Fund, Ltd<sup>.(20)</sup> | 166415 | (6) | 210000 | 476149 | 2.1% |

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\* Less than 1%.

(1) Represents shares issuable upon exercise of outstanding warrants. See "Prospectus Summary."

(2) Based on 20,683,095 shares of common stock outstanding as of December 19, 2025, as adjusted to reflect assumption that all shares offered hereby will be sold and thus assuming the 1,900,500 warrants such shares are underlying will be exercised. Such percentages are thus based on an assumption that there will be 22,583,595 shares outstanding after the offering.

(3) Maier J. Tarlow is the control person of the selling stockholder.

(4) Ayrton Capital LLC, the investment manager to Alto Opportunity Master Fund, SPC – Segregated Master Portfolio B, ("Alto Opportunity Master Fund B"), has discretionary authority to vote and dispose of the shares held by Alto Opportunity Master Fund B. Waqas Khatri is the managing member of Ayrton Capital LLC and in his capacity as director of Alto Opportunity Master Fund B, may also be deemed to have investment discretion and voting power over the shares held by Alto Opportunity Master Fund B. Mr. Khatri disclaims any beneficial ownership of these shares.

(5) Steven Boyd is the control person of the selling stockholder.

(6) Excludes shares underlying warrants, which are not exercisable to the extent such exercise would result in the holder beneficially owning more than 4.99% of our outstanding common stock as of April 16, 2021.

(7) Berke Bakay is the control person of the selling stockholder.

(8) Michael Bigger is the control person of the selling stockholder.

(9) Peter Poole is the control person of the selling stockholder.

(10) Robert Romero is the control person of the selling stockholder.

(11) Heights Capital Management, Inc., the authorized agent of CVI Investments, Inc ("CVI"), has discretionary authority to vote and dipose of the shares held by CVI and may be deemed to be the beneficial owner of these shares. Martin Kobinger, in his capacity as Investment Manager of Heights Capital Management, Inc., may also be deemed to have investment discretion and voting power over the shares held by CVI. Mr. Kobinger disclaims any such beneficial ownership of the shares. CVI Investments, Inc.is affiliated with one or more FINRA member. The selling stockholder purchased the securities of the Company owned by it in the ordinary course of business, and at the time of the purchase of such securities to be resold, the selling stockholder had no agreements or understandings, directly or indirectly, with any person to distribute such securities.

(12) Empery Asset Management LP, the authorized agent of Empery Asset Master Ltd ("EAM"), has discretionary authority to vote and dispose of the shares held by EAM and may be deemed to be the beneficial owner of these shares. Martin Hoe and Ryan Lane, in their capacity as investment managers of Empery Asset Management LP, may also be deemed to have investment discretion and voting power over the shares held by EAM. EAM, Mr. Hoe and Mr. Lane each disclaim any beneficial ownership of these shares.

(13) Empery Asset Management LP, the authorized agent of Empery Tax Efficient, LP ("ETE"), has discretionary authority to vote and dispose of the shares held by ETE and may be deemed to be the beneficial owner of these shares. Martin Hoe and Ryan Lane, in their capacity as investment managers of Empery Asset Management LP, may also be deemed to have investment discretion and voting power over the shares held by ETE. ETE, Mr. Hoe and Mr. Lane each disclaim any beneficial ownership of these shares.

(14) Empery Asset Management LP, the authorized agent of Empery Tax Efficient III, LP ("ETE III"), has discretionary authority to vote and dispose of the shares held by ETE III and may be deemed to be the beneficial owner of these shares. Martin Hoe and Ryan Lane, in their capacity as investment managers of Empery Asset Management LP, may also be deemed to have investment discretion and voting power over the shares held by ETE III. ETE III, Mr. Hoe and Mr. Lane each disclaim any beneficial ownership of these shares.

(15) Hudson Bay Capital Management LP, the investment manager of Hudson Bay Master Fund Ltd., has voting and investment power over these securities. Sander Gerber is the managing member of Hudson Bay Capital GP LLC, which is the general partner of Hudson Bay Capital Management LP. Each of Hudson Bay Master Fund Ltd. and Sander Gerber disclaims beneficial ownership over these securities.

(16) Mitchell P. Kopin and Daniel B. Asher, each of whom are managers of Intracoastal Capital LLC ("Intracoastal"), have shared voting control and investment discretion over the securities reported herein that are held by Intracoastal. As a result, each of Mr. Kopin and Mr. Asher may be deemed to have beneficial ownership (as determined under Section 13(d) of the Exchange Act of the securities reported herein that are held by Intracoastal.

(17) David Feldman is the control person of the selling stockholder.

(18) Jeff Easton is the control person of the selling stockholder.

(19) Hadar Shamir and Nir Shamir are the control persons of the selling stockholder.

(20) Hal Mintz is the control person of the selling stockholder.

**PLAN OF DISTRIBUTION**

This prospectus includes the resale by the selling stockholders of 1,900,500 shares of common stock offered by the selling stockholders, which are issuable upon the exercise of outstanding warrants.

Each selling stockholder and any of its pledgees, assignees and successors-in-interest may, from time to time, sell any or all of its shares of common stock on the Nasdaq Capital Market or any other stock exchange, market or trading facility on which our shares are traded or in private transactions. These sales may be at fixed or negotiated prices. A selling stockholder may use any one or more of the following methods when selling shares:

● ordinary brokerage transactions and transactions in which the broker-dealer solicits purchasers;

● block trades in which the broker-dealer will attempt to sell the shares as agent but may position and resell a portion of the block as principal to facilitate the transaction;

● purchases by a broker-dealer as principal and resale by the broker-dealer for its account;

● an exchange distribution in accordance with the rules of the applicable exchange;

● privately negotiated transactions;

● settlement of short sales entered into after the effective date of the registration statement of which this prospectus is a part;

● broker-dealers may agree with the selling stockholders to sell a specified number of such shares at a stipulated price per share;

● through the writing or settlement of options or other hedging transactions, whether through an options exchange or otherwise;

● a combination of any such methods of sale; or

● any other method permitted pursuant to applicable law.

The selling stockholders may also sell shares under Rule 144 under the Securities Act, if available, rather than under this prospectus.

In addition, the selling stockholders may transfer the shares of common stock by other means not described in this prospectus. If the selling stockholders effect such transactions by selling shares of common stock to or through underwriters, broker-dealers or agents, such underwriters, broker-dealers or agents may receive commissions in the form of discounts, concessions or commissions from the selling stockholders or commissions from purchasers of the shares of common stock for whom they may act as agent or to whom they may sell as principal (which discounts, concessions or commissions as to particular underwriters, broker-dealers or agents may be in excess of those customary in the types of transactions involved). In connection with sales of the shares of common stock or otherwise, the selling stockholders may enter into hedging transactions with broker-dealers, which may in turn engage in short sales of the shares of common stock in the course of hedging in positions they assume. The selling stockholders may also sell shares of common stock short and deliver shares of common stock covered by this prospectus to close out short positions and to return borrowed shares in connection with such short sales. The selling stockholders may also loan or pledge shares of common stock to broker-dealers that in turn may sell such shares.

The selling stockholders may pledge or grant a security interest in some or all of the shares of common stock owned by them and, if they default in the performance of their secured obligations, the pledgees or secured parties may offer and sell the shares of common stock from time to time pursuant to this prospectus or any amendment to this prospectus under Rule 424(b)(3) or other applicable provision of the Securities Act amending, if necessary, the list of selling stockholders to include the pledgee, transferee or other successors in interest as selling stockholders under this prospectus. The selling stockholders also may transfer and donate the shares of common stock in other circumstances in which case the transferees, donees, pledgees or other successors in interest will be the selling beneficial owners for purposes of this prospectus.

To the extent required by the Securities Act and the rules and regulations thereunder, the selling stockholders and any broker-dealer participating in the distribution of the shares of common stock may be deemed to be "underwriters" within the meaning of the Securities Act, and any commission paid, or any discounts or concessions allowed to, any such broker-dealer may be deemed to be underwriting commissions or discounts under the Securities Act. At the time a particular offering of the shares of common stock is made, a prospectus supplement, if required, will be distributed, which will set forth the aggregate amount of shares of common stock being offered and the terms of the offering, including the name or names of any broker-dealers or agents, any discounts, commissions and other terms constituting compensation from the selling stockholders and any discounts, commissions or concessions allowed or re-allowed or paid to broker-dealers.

There can be no assurance that any selling stockholder will sell any or all of the shares of common stock registered pursuant to the registration statement, of which this prospectus forms a part.

The selling stockholders and any other person participating in such distribution will be subject to applicable provisions of the Exchange Act, and the rules and regulations thereunder, including, without limitation, to the extent applicable, Regulation M of the Exchange Act, which may limit the timing of purchases and sales of any of the shares of common stock by the selling stockholders and any other participating person. To the extent applicable, Regulation M may also restrict the ability of any person engaged in the distribution of the shares of common stock to engage in market-making activities with respect to the shares of common stock. All of the foregoing may affect the marketability of the shares of common stock and the ability of any person or entity to engage in market-making activities with respect to the shares of common stock.

We will pay all expenses of the registration of the shares of common stock.

Once sold under the registration statement, of which this prospectus forms a part, the shares of common stock will be freely tradable in the hands of persons other than our affiliates.

**LEGAL MATTERS**

The validity of the common stock offered hereby will be passed upon for us by Lewis Brisbois Bisgaard & Smith LLP, San Francisco, California.

**EXPERTS**

Our financial statements as of December 31, 2024 and December 31, 2023 have been included in the report of Sadler, Gibb & Associates, LLC, an independent registered public accounting firm, as stated in its report incorporated by reference herein, and have been so incorporated in reliance upon such report and upon the authority of such firm as experts in accounting and auditing.

**WHERE YOU CAN FIND MORE INFORMATION**

We have filed with the SEC a Registration Statement on Form S-3 under the Securities Act to register the common stock offered by this prospectus. The term "registration statement" means the original registration statement and any and all amendments thereto, including the schedules and exhibits to the original registration statement or any amendment. This prospectus is part of that registration statement. This prospectus does not contain all of the information set forth in the registration statement or the exhibits to the registration statement. For further information with respect to us and the common stock being offered pursuant to this prospectus, you should refer to the registration statement and its exhibits. Statements contained in this prospectus as to the contents of any contract, agreement or other document referred to are not necessarily complete, and you should refer to the copy of that contract or other documents filed as an exhibit to the registration statement.

We are subject to the information reporting requirements of the Exchange Act and we are required to file reports, proxy statements and other information with the SEC. These reports, proxy statements, and other information are available for inspection and copying at the SEC's website at <u>http://www.sec.gov</u>. These documents may also be accessed on our website at www.amplitech.com. Information contained on our website is not incorporated by reference into this prospectus and you should not consider information contained on our website to be part of this prospectus. Information contained on or accessible through our website is not a part of this prospectus, and the inclusion of our website address in this prospectus is an inactive textual reference only.

The representations, warranties and covenants made by us in any agreement that is filed as an exhibit to the registration statement of which this prospectus is a part were made solely for the benefit of the parties to such agreement, including, in some cases, for the purpose of allocating risk among the parties to such agreements, and should not be deemed to be a representation, warranty or covenant to you. Moreover, such representations, warranties or covenants were made as of an earlier date. Accordingly, such representations, warranties and covenants should not be relied on as accurately representing the current state of our affairs.

This prospectus includes statistical and other industry and market data that we obtained from industry publications and research, surveys and studies conducted by third parties. Industry publications and third-party research, surveys and studies generally indicate that they have gathered their information from sources they believe to be reliable, although they do not guarantee the accuracy or completeness of such information. While we believe that these industry publications and third-party research, surveys and studies are reliable, we have not independently verified such data.

**INCORPORATION OF CERTAIN INFORMATION BY REFERENCE**

The SEC allows us to "incorporate by reference" into this prospectus the information we file with it, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is considered to be part of this prospectus. Any statement contained herein or in a document incorporated or deemed to be incorporated by reference into this document will be deemed to be modified or superseded for purposes of the document to the extent that a statement contained in this document or any other subsequently filed document that is deemed to be incorporated by reference into this document modifies or supersedes the statement. We incorporate by reference in this prospectus the following information (other than, in each case, documents or information deemed to have been furnished and not filed in accordance with SEC rules):

● our Annual Report on [Form 10-K](https://www.sec.gov/Archives/edgar/data/1518461/000164117225001715/form10-k.htm) for the fiscal year ended December 31, 2024 filed with the SEC on March 31, 2025;

● our Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2025 filed with the SEC on [May 15, 2025](https://www.sec.gov/Archives/edgar/data/1518461/000164117225010523/form10-q.htm) , for the quarterly period ended June 30, 2025 filed with the SEC on [August 14, 2025](https://www.sec.gov/Archives/edgar/data/1518461/000149315225011972/form10-q.htm) , and for the quarterly period ended September 30, 2025 filed with the SEC on [November 14, 2025](https://www.sec.gov/Archives/edgar/data/1518461/000149315225022459/form10-q.htm) ;

● our Current Reports on Form 8-K filed with the SEC on [January 21, 2025](https://www.sec.gov/Archives/edgar/data/1518461/000149315225002942/form8-k.htm) , [March 24, 2025](https://www.sec.gov/Archives/edgar/data/1518461/000164117225000178/form8-k.htm) , [March 31, 2025](https://www.sec.gov/Archives/edgar/data/1518461/000164117225001724/form8-k.htm) , [April 30, 2025](https://www.sec.gov/Archives/edgar/data/1518461/000164117225007751/form8-k.htm) ; [July 22, 2025](https://www.sec.gov/Archives/edgar/data/1518461/000164117225020599/form8-k.htm) , [October 30, 2025](https://www.sec.gov/Archives/edgar/data/1518461/000149315225020141/form8-k.htm) ; [November 12, 2025](https://www.sec.gov/Archives/edgar/data/1518461/000149315225021710/form8-k.htm) , [December 11, 2025](https://www.sec.gov/Archives/edgar/data/1518461/000149315225027138/form8-k.htm) , and [December 15, 2025](https://www.sec.gov/Archives/edgar/data/1518461/000149315225027624/form8-k.htm) ;

● our definitive proxy statement on Schedule 14A, filed with the SEC on [October 15, 2025](https://www.sec.gov/Archives/edgar/data/1518461/000149315225018225/formdef14a.htm) , and supplemented on [November 3, 2025](https://www.sec.gov/Archives/edgar/data/1518461/000149315225020591/formdefa14a.htm) ; and

● our [Form 8-A12B](https://www.sec.gov/Archives/edgar/data/1518461/000147793221000843/ampg_8a12b.htm) , filed with the SEC on February 16, 2021; and

● the description of the securities of the Company contained in [Exhibit 4.4](https://www.sec.gov/Archives/edgar/data/1518461/000164117225001715/ex4-4.htm) of our Annual Report on Form 10-K for the year ended December 31, 2024 (filed with the SEC on March 31, 2025).

All reports and other documents that we subsequently file with the SEC (excluding any portions of such documents that have been "furnished to" but not "filed with" the SEC) pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of this prospectus and before the later of (1) the completion of the offering of our common stock pursuant to this prospectus and (2) the date we stop offering our common stock pursuant to this prospectus, will be deemed to be incorporated by reference into this prospectus and to be part of this prospectus from the date of filing of such reports and documents. These documents include periodic reports, such as Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K, as well as proxy statements. We will not, however, incorporate by reference in this prospectus any documents or portions thereof that are not deemed "filed" with the SEC, including any information furnished pursuant to Item 2.02 or Item 7.01 of our Current Reports on Form 8-K after the date of this prospectus unless, and except to the extent, specified in such Current Reports. Information in this prospectus supersedes information incorporated by reference that we filed with the SEC prior to the date of this prospectus. We have authorized no one to provide you with any information that differs from that contained in this prospectus. Accordingly, you should not rely on any information that is not contained in this prospectus. You should not assume that the information in this prospectus is accurate as of any date other than the date of the front cover of this prospectus

We will provide to each person, including any beneficial owner, to whom a prospectus (or a notice of registration in lieu thereof) is delivered a copy of any of these filings (other than an exhibit to these filings, unless the exhibit is specifically incorporated by reference as an exhibit to this prospectus) at no cost, upon a request to us by writing or telephoning us at the following address and telephone number:

AmpliTech Group, Inc.

155 Plant Avenue, Hauppauge, NY 11788

(631) 521-7831

**PART II**

**INFORMATION NOT REQUIRED IN PROSPECTUS**

**ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION**

Set forth below is an estimate (except for registration fees, which are actual) of the approximate amount of the fees and expenses payable by us in connection with the issuance and distribution of the shares of our common stock described in this Post-Effective Amendment No. 1.

---

| | |
|:---|:---|
| **Nature of Expense** | **Amount** |
| SEC registration fee | $1243 \* |
| Accounting fees and expenses | 4500 |
| Legal fees and expenses | 20000 |
| Miscellaneous | 2500 |
| Total | $28243 |

---

\* Previously paid.

**ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS**

Nevada law provides that a Nevada corporation may indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative, other than an action by or in the right of the corporation (i.e., a "non-derivative proceeding"), by reason of the fact that he or she is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses, including attorneys' fees, judgments, fines and amounts paid in settlement actually and reasonably incurred by him in connection with the action, suit or proceeding if he or she:

● Is not liable under Section 78.138 of the Nevada Revised Statutes for breach of his or her fiduciary duties to the corporation; or

● Acted in good faith and in a manner which he or she reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe his or her conduct was unlawful.

In addition, a Nevada corporation may indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the corporation to procure a judgment in its favor (i.e., a "derivative proceeding"), by reason of the fact that he or she is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against expenses, including amounts paid in settlement and attorneys' fees actually and reasonably incurred by him or her in connection with the defense or settlement of the action or suit if he:

● Is not liable under Section 78.138 of the Nevada Revised Statute for breach of his or her fiduciary duties to the corporation; or

● Acted in good faith and in a manner which he or she reasonably believed to be in or not opposed to the best interests of the corporation.

Under Nevada law, indemnification may not be made for any claim, issue or matter as to which such a person has been adjudged by a court of competent jurisdiction, after exhaustion of all appeals therefrom, to be liable to the corporation or for amounts paid in settlement to the corporation, unless and only to the extent that the court in which the action or suit was brought or other court of competent jurisdiction determines upon application that in view of all the circumstances of the case, the person is fairly and reasonably entitled to indemnity for such expenses as the court deems proper.

To the extent that a director, officer, employee or agent of a corporation has been successful on the merits or otherwise in defense of any non-derivative proceeding or any derivative proceeding, or in defense of any claim, issue or matter therein, the corporation is obligated to indemnify him or her against expenses, including attorneys' fees, actually and reasonably incurred in connection with the defense.

Further, Nevada law permits a Nevada corporation to purchase and maintain insurance or to make other financial arrangements on behalf of any person who is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise for any liability asserted against him or her and liability and expenses incurred by him or her in his or her capacity as a director, officer, employee or agent, or arising out of his or her status as such, whether or not the corporation has the authority to indemnify him or her against such liability and expenses.

Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the Company pursuant to the foregoing provisions, or otherwise, we have been advised that in the opinion of the SEC this indemnification is against public policy as expressed in the Securities Act and is therefore unenforceable.

**ITEM 16. EXHIBITS**

A list of exhibits included as part of this registration statement is set forth in the Exhibit Index and is incorporated herein by reference.

**ITEM 17. UNDERTAKINGS**

(a) The
 undersigned Registrant hereby undertakes:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) To
 file, during any period in which offers or sales are being made; a post-effective amendment to this registration statement:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) to
 include any prospectus required by Section 10(a)(3) of the Securities Act of 1933, as amended (the "Securities Act");

(ii) to
 reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent
 post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set
 forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if
 the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end
 of the estimated maximum offering range may be reflected in the form of prospectus filed with the SEC pursuant to Rule 424(b) if,
 in the aggregate, the changes in volume and price represent no more than a 20% change in the maximum aggregate offering price set
 forth in the "Calculation of Filing Fee Tables" table in the effective registration statement;

(iii) to
 include any material information with respect to the plan of distribution not previously disclosed in the registration statement
 or any material change to such information in the registration statement;

*provided, however,* that subparagraphs (a)(1)(i), (a)(1)(ii) and (a)(1)(iii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the SEC by the Registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934, as amended, that are incorporated by reference in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration statement.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) That,
 for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a
 new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be
 deemed to be the initial bona fide offering thereof.

(3) To
 remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the
 termination of the offering.

(4) That,
 for the purpose of determining liability under the Securities Act to any purchaser:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(A) Each
 prospectus filed by the Registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the registration statement as of the
 date the filed prospectus was deemed part of and included in the registration statement; and

(B) Each
 prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5), or (b)(7) as part of a registration statement in reliance on
 Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii), or (x) for the purpose of providing the information
 required by Section 10(a) of the Securities Act shall be deemed to be part of and included in the registration statement as of the
 earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities
 in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is
 at that date an underwriter, such date shall be deemed to be a new effective date of the registration statement relating to the securities
 in the registration statement to which that prospectus relates, and the offering of such securities at that time shall be deemed
 to be the initial bona fide offering thereof. Provided, however, that no statement made in a registration statement or prospectus
 that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration
 statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior
 to such effective date, supersede or modify any statement that was made in the registration statement or prospectus that was part
 of the registration statement or made in any such document immediately prior to such effective date; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(5) That,
 for the purpose of determining liability of the Registrant under the Securities Act to any purchaser in the initial distribution
 of the securities, the undersigned Registrant undertakes that in a primary offering of securities of the undersigned Registrant pursuant
 to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities
 are offered or sold to such purchaser by means of any of the following communications, the undersigned Registrant will be a seller
 to the purchaser and will be considered to offer or sell such securities to such purchaser:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) Any
 preliminary prospectus or prospectus of the undersigned Registrant relating to the offering required to be filed pursuant to Rule
 424;

(ii) Any
 free writing prospectus relating to the offering prepared by or on behalf of the undersigned Registrant or used or referred to by
 the undersigned Registrant;

(iii) The
 portion of any other free writing prospectus relating to the offering containing material information about the undersigned Registrant
 or its securities provided by or on behalf of the undersigned Registrant; and

(iv) Any
 other communication that is an offer in the offering made by the undersigned Registrant to the purchaser.

(b) The
 undersigned Registrant hereby undertakes that, for the purpose of determining any liability under the Securities Act, each filing
 of the Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where applicable, each
 filing of an employee benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference
 in this registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and
 the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(c) Insofar
 as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons
 of the Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the
 SEC such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event
 that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid
 by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted
 by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in
 the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the
 question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the
 final adjudication of such issue.

**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 Post-Effective Amendment No. 1 to the Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in Hauppauge, State of New York, on December 22, 2025.

---

| | |
|:---|:---|
| **AMPLITECH GROUP, INC.** | **AMPLITECH GROUP, INC.** |
| By: | */s/ Fawad Maqbool* |
|  | Fawad Maqbool |
|  | *President and Chief Executive Officer* |
|  | *(Principal Executive Officer)* |

---

**POWER OF ATTORNEY**

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below hereby constitutes and appoints each of Fawad Maqbool and Louisa Sanfratello, or either of them, each acting alone, his or her true and lawful attorney-in-fact and agent, with full power of substitution and re-substitution, for such person and in his or her name, place and stead, in any and all capacities, in connection with the Registrant's Registration Statement on Form S-3 under the Securities Act of 1933, as amended, or the Securities Act, any and all pre-effective and post-effective amendments to this Registration Statement, and any Registration Statement filed pursuant to Rule 413 or Rule 462 under the Securities Act, and to file or cause to be filed the same, with all exhibits thereto and other documents in connection therewith, with the SEC, granting unto said attorneys-in-fact and agents, and each of them singly, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the foregoing, as fully and to all intents and purposes as each might or could do in person hereby ratifying and confirming all that said attorneys-in-fact and agents, or their substitute or substitutes, may lawfully do or cause to be done by virtue of this Power of Attorney.

---

| | | |
|:---|:---|:---|
| **Signature** | **Title** | **Date** |
| /s/ Fawad Maqbool | President, Chief Executive Officer and Chairman of the Board of Directors | December 22, 2025 |
| Fawad Maqbool | *(Principal Executive Officer)* |  |
| /s/ Louisa Sanfratello | Chief Financial Officer and Director | December 22, 2025 |
| Louisa Sanfratello | *(Principal Financial Officer and Principal Accounting Officer)* |  |
| /s/ Andrew Lee | Director | December 22, 2025 |
| Andrew Lee |  |  |
| /s/ Daniel Mazziota | Director | December 22, 2025 |
| Daniel Mazziota |  |  |
| /s/ Shailesh Modi | Director | December 22, 2025 |
| Shailesh Modi |  |  |

---

**EXHIBIT INDEX**

---

| | |
|:---|:---|
| **Exhibit No.** | **Description** |
| 3.1 | [Amended and Restated Articles of Incorporation of AmpliTech Group, Inc. (incorporated by reference to the Current Report on Form 8-K filed on December 28, 2020)](https://www.sec.gov/Archives/edgar/data/1518461/000147793220007503/ampg_ex31.htm) |
| 3.2 | [Amended and Restated Bylaws of AmpliTech Group, Inc. (incorporated by reference to the Current Report on Form 8-K filed on December 28, 2020)](https://www.sec.gov/Archives/edgar/data/1518461/000147793220007503/ampg_ex34.htm) |
| 3.3 | [Amended and Restated Series A Convertible Preferred Stock Certificate of Designation (incorporated by reference to the Current Report on Form 8-K filed on December 28, 2020)](https://www.sec.gov/Archives/edgar/data/1518461/000147793220007503/ampg_ex32.htm) |
| 3.4 | [Certificate of Amendment, filed with the Secretary of State of Nevada (incorporated by reference to the Current Report on Form 8-K filed on February 19, 2021)](https://www.sec.gov/Archives/edgar/data/1518461/000147793221000978/ampg_ex31.htm) |
| 3.5 | [Certificate of Correction, filed with the Secretary of State of Nevada (incorporated by reference to the Current Report on Form 8-K filed on February 19, 2021)](https://www.sec.gov/Archives/edgar/data/1518461/000147793221000978/ampg_ex32.htm) |
| 4.1 | [Form of Common Stock Purchase Warrant (incorporated by reference to 8-K filed April 15, 2021)](https://www.sec.gov/Archives/edgar/data/1518461/000147793221002380/ampg_ex41.htm) |
| 5.1\* | [Opinion of Lewis Brisbois Bisgaard & Smith LLP](ex5-1.htm) |
| 10.1 | [Form of Securities Purchase Agreement dated as of April 15, 2021 by and among the Company and the investors parties thereto (incorporated by reference to Form 8-K filed on April 15, 2021)](https://www.sec.gov/Archives/edgar/data/1518461/000147793221002380/ampg_ex101.htm) |
| 23.1\* | [Consent of Sadler, Gibb & Associates, LLC](ex23-1.htm) |
| 23.2\* | [Consent of Lewis Brisbois Bisgaard & Smith LLP (included in the Exhibit 5.1)](ex5-1.htm) |
| 24.1\* | [Power of Attorney (included on signature page).](#me_013) |

---

\* Filed herewith

## Exhibit 5.1

**Exhibit 5.1**

---

| | |
|:---|:---|
| <br>![](ex5-1_001.jpg)<br>| <br> 45 Fremont Street, Suite 3000<br> San Francisco, California 94105<br> Phone: 415.362.2580 |

---

December 22, 2025

AmpliTech Group, Inc.

155 Plant Avenue

Hauppauge, NY 11788

Re: AmpliTech Group, Inc. <br> Registration Statement on Form S-3 (File No. 333-255656)

Ladies and Gentlemen:

We act as counsel to AmpliTech Group, Inc., a Nevada corporation (the "<u>Company</u>"), in connection with the Registration Statement on Form S-3 (File No. 333-255656) originally filed by the Company with the Securities and Exchange Commission (the "<u>Commission</u>") under the Securities Act of 1933, as amended (the "<u>Securities Act</u>"), on April 30, 2021, as declared effective by the Commission on May 11, 2021, and as amended by Post-Effective Amendment No. 1 to Form S-3 being filed with the Commission on the date hereof (as amended, the "<u>Registration Statement</u>"), relating to the offer and sale of up to 1,900,500 shares of common stock, par value $0.001 per share ("<u>Common Stock</u>") of the Company (the "<u>Shares</u>") by the selling stockholders named in the Registration Statement (the "<u>Selling Stockholders</u>") to be sold by the Selling Stockholders in the manner set forth in the Registration Statement, which Shares are issuable upon the exercise of outstanding warrants to purchase 1,900,500 shares of Common Stock which were issued on April 16, 2021 (the "<u>Warrants</u>").

You have requested our opinion as to the matters set forth below in connection with the Registration Statement. For purposes of rendering the opinion set forth below, we have examined such documents and reviewed such questions of law as we have considered necessary and appropriate for the purposes of our opinion, including (i) the Registration Statement, including the exhibits filed therewith, (ii) the prospectus included in the Registration Statement (the "<u>Prospectus</u>"), (iii) the Company's amended and restated articles of incorporation as currently in effect (the "<u>Articles of Incorporation</u>"), (iv) the Company's amended and restated bylaws as currently in effect (the "<u>Bylaws</u>"), (v) the corporate minutes and other actions of the Company, and (vi) the originals or copies certified to our satisfaction of such other documents, records, ledgers, certificates, memoranda and other instruments as in our judgment are necessary or appropriate to enable us to render the opinion expressed below.

In addition, in rendering this opinion, we have assumed: (A) the genuineness and authenticity of all signatures on original documents; (B) the genuineness and authenticity of all documents submitted to us as originals; (C) the conformity to originals of all documents submitted to us as copies; (D) the accuracy, completeness and authenticity of certificates of public officials; and (E) the due authorization, execution and delivery of all documents where due authorization, execution and delivery are prerequisites to the effectiveness of such documents (other than with respect to the Company). We have not sought independently to verify such matters.

ARIZONA ● CALIFORNIA ● COLORADO ● CONNECTICUT ● DELAWARE ● FLORIDA ● GEORGIA ● ILLINOIS ● INDIANA ● KANSAS ● KENTUCKY ● LOUISIANA MARYLAND ● MASSACHUSETTS ● MINNESOTA ● MISSISSIPPI ● MISSOURI ● NEVADA ● NEW JERSEY ● NEW MEXICO ● NEW YORK ● NORTH CAROLINA OHIO ● OREGON ● PENNSYLVANIA ● RHODE ISLAND ● TENNESSEE ● TEXAS ● UTAH ● VIRGINIA ● WASHINGTON ● WASHINGTON D.C. ● WEST VIRGINIA

AmpliTech Group, Inc.

December 22, 2025

We express no opinions other than as specifically set forth herein. We are opining solely on all applicable statutory provisions of the Nevada Revised Statutes (the "<u>NRS</u>") and express no opinion as to whether the laws of any other jurisdiction are applicable to the subject matter hereof. We are not rendering any opinion as to compliance with any federal or state law, rule or regulation relating to securities, or to the sale or issuance thereof. This opinion letter deals only with the specified legal issues expressly addressed herein, and you should not infer any opinion that is not explicitly stated herein from any matter addressed in this opinion letter.

Based on the foregoing and in reliance thereon, and subject to the assumptions, qualifications, limitations and exceptions set forth below, we are of the opinion that:

The Shares have been duly authorized and when issued, sold and delivered in accordance with the terms of the applicable Warrant and as described in the Registration Statement, the Shares will be validly issued, fully paid, and non-assessable.

The opinion set forth above are subject to the following additional assumptions:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) the Registration Statement, and any amendments thereto (including post-effective amendments), will have been declared effective under the Securities Act and such effectiveness shall not have been terminated, suspended or rescinded, and the Prospectus, and any and all prospectus supplement(s) required by applicable laws, have been delivered and filed as required by such laws;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) all Shares will be issued and sold in compliance with applicable federal and state securities laws, rules and regulations and solely in the manner provided in the Registration Statement and the appropriate prospectus supplement and there will not have occurred any change in law or fact affecting the validity of any of the opinions rendered herein;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) all Shares will be issued pursuant to the terms of the Warrants, the Warrants have been duly authorized and duly executed and delivered by the Company and the other parties thereto and outstanding, the Warrants were sold for consideration in compliance with applicable federal and state securities laws, rules and regulations, and such Warrants constitute the valid and binding obligations of the Company, enforceable against the Company in accordance with their terms, subject to applicable bankruptcy, insolvency and similar laws affecting creditors' rights generally, concepts of reasonableness and equitable principles of general applicability;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iv) with respect to the issuance of the Warrants and the Shares, (a) the board of directors of the Company has taken all necessary corporate action to approve the issuance and terms of the Warrants (including the sufficiency of the consideration for such Warrants and the sufficiency of the exercise price as consideration for the Shares, and the issuance of the Shares in accordance to the terms of the Warrants, (b) the board of directors of the Company has taken all necessary corporate action to approve the issuance of the Shares upon exercise of the Warrants pursuant to the terms thereof, and (c) the Shares issuable upon exercise of the Warrants have been duly authorized and reserved for issuance by all necessary corporate action and in accordance with applicable law;

LEWIS BRISBOIS BISGAARD & SMITH LLP

www.lewisbrisbois.com

AmpliTech Group, Inc.

December 22, 2025

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(v) when issued, the issuance, sale and delivery of the Shares by the Company, and the incurrence and performance of the Company's obligations relating to the Warrants and the Shares, and any consideration received by the Company for the issuance, sale and delivery of the Shares will comply with, and will not violate, the Articles of Incorporation or Bylaws or any applicable law, rule or regulation, or result in a default under or breach of any agreement or instrument binding upon the Company and will comply with any requirement or restriction imposed by any court or governmental body having jurisdiction over the Company or to which the issuance, sale and delivery of the Shares or the incurrence and performance of such obligations may be subject or violate any applicable public policy, or be subject to any defense in law or equity;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(vi) all actions taken by the Company authorizing the offer and issuance of the Warrants and the Shares shall remain in effect and unchanged at all times during which the Warrants are outstanding and Shares are offered and issued and such authorization and action shall not have been modified or rescinded; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(vii) there will exist, under the Articles of Incorporation, the requisite number of authorized but unissued shares of Common Stock to issue upon exercise of the Warrants.

The opinion above is subject to the effects of (i) bankruptcy, insolvency, fraudulent conveyance, fraudulent transfer, reorganization, receivership, moratorium and other similar laws relating to or affecting enforcement of creditors' rights or remedies generally, (ii) general principles of equity, whether such principles are considered in a proceeding of law or at equity, and (iii) an implied covenant of good faith, reasonableness and fair dealing and standards of materiality.

We hereby consent to the filing of this opinion as an exhibit to the Registration Statement to be filed by the Company on or about the date hereof and to its incorporation by reference into the Registration Statement and further consent to the reference to our name under the caption "Legal Matters" in the Prospectus, which is a part of the Registration Statement. In giving this consent, we do not admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act.

---

| |
|:---|
| Very truly yours, |
| /s/ Lewis Brisbois Bisgaard & Smith LLP |
| LEWIS BRISBOIS BISGAARD & SMITH llp |

---

LEWIS BRISBOIS BISGAARD & SMITH LLP

www.lewisbrisbois.com

## Exhibit 23.1

**EXHIBIT 23.1**

**CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM**

As independent registered public accountants, we hereby consent to the use of our report dated March 31, 2025 with respect to the consolidated financial statements of AmpliTech Group, Inc. for the years ended December 31, 2024 and 2023, in its Post-Effective Amendment No. 1 to the Registration Statement on Form S-3 (Registration Statement No. 333-255656). We also consent to the reference of our firm under the caption "Experts" in this registration statement.

/s/ Sadler, Gibb & Associates, LLC

Draper, UT

December 22, 2025