AmpliTech Group (NASDAQ: AMPG) holder discloses 1.74M-share, 6.9% position

Rhea-AI Filing Summary

AmpliTech Group, Inc. received a beneficial ownership report from three affiliated broker-dealers: G1 Execution Services, LLC, SIG Brokerage, LP and Susquehanna Securities, LLC. Together, the reporting persons state beneficial ownership of 1,744,929 shares of AmpliTech common stock, representing 6.9% of the class, based on 25,338,799 shares outstanding as of May 11, 2026. The SIG Brokerage, LP figure includes options to buy 27,500 shares, and the Susquehanna Securities, LLC figure includes options to buy 1,683,000 shares. They report various sole and shared voting and dispositive powers over these shares, note that they may be deemed a group, and each disclaims beneficial ownership of shares held directly by the others.

Key Figures

Shares beneficially owned: 1,744,929 shares Ownership percentage: 6.9% Shares outstanding: 25,338,799 shares +3 more

6 metrics

Shares beneficially owned 1,744,929 shares Total AmpliTech common shares reported as beneficially owned by the reporting persons

Ownership percentage 6.9% Percentage of AmpliTech common stock class reported as beneficially owned

Shares outstanding 25,338,799 shares AmpliTech shares outstanding as of May 11, 2026 from the company’s Form 10-Q

Options held by SIG Brokerage, LP 27,500 shares Options to buy AmpliTech shares included in SIG Brokerage, LP’s beneficial ownership

Options held by Susquehanna Securities, LLC 1,683,000 shares Options to buy AmpliTech shares included in Susquehanna Securities, LLC’s beneficial ownership

Sole voting power of Susquehanna Securities, LLC 1,684,518 shares AmpliTech shares over which Susquehanna Securities, LLC reports sole voting power

Key Terms

beneficial ownership, dispositive power, Schedule 13G, CUSIP Number, +1 more

5 terms

beneficial ownership financial

"The information required by this Item 4(a) is set forth in Row 9...beneficially owned"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

dispositive power financial

"Sole Dispositive Power 1,684,518.00 8 | Shared Dispositive Power 1,744,929.00"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

Schedule 13G regulatory

"form_type: "SCHEDULE 13G""

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

CUSIP Number financial

"(e) | CUSIP Number(s): 03211Q200"

A CUSIP number is a nine-character code that uniquely identifies a specific U.S. or Canadian stock, bond, or other security, similar to a barcode or a social-security number for a financial instrument. It matters to investors because it removes confusion between similar securities, ensures trades and settlements are applied to the correct issue, and helps locate official documents and transaction records quickly.

options to buy financial

"includes options to buy 27,500 Shares...includes options to buy 1,683,000 Shares"

Options to buy are contracts that give the owner the right, but not the obligation, to purchase a stock at a predetermined price before a set expiry date. Think of it like reserving the right to buy a concert ticket at today’s price if demand later pushes the price up — they let investors benefit from rising shares while limiting potential loss to the amount paid for the contract.

FAQ

What stake in AmpliTech Group (AMPG) do the reporting persons disclose?

The reporting persons disclose beneficial ownership of 1,744,929 AmpliTech shares, representing 6.9% of the common stock, based on 25,338,799 shares outstanding as of May 11, 2026.

Who are the reporting persons in this AmpliTech (AMPG) Schedule 13G?

The Schedule 13G is filed by three affiliated broker-dealers: G1 Execution Services, LLC, SIG Brokerage, LP and Susquehanna Securities, LLC, collectively referred to as the reporting persons.

How many AmpliTech (AMPG) shares are tied to options held by the reporting persons?

The filing states that SIG Brokerage, LP’s beneficial ownership includes options to buy 27,500 shares, and Susquehanna Securities, LLC’s beneficial ownership includes options to buy 1,683,000 shares of AmpliTech common stock.

What voting and dispositive powers over AmpliTech (AMPG) shares are reported?

The reporting persons list sole and shared voting and dispositive power over AmpliTech shares, including shared voting and dispositive power over 1,744,929 shares across the affiliated entities.

Do the AmpliTech (AMPG) reporting persons consider themselves a group?

They state the affiliated broker-dealers may be deemed a group, but each disclaims beneficial ownership of shares owned directly by another reporting person in the filing.

What share count does the AmpliTech (AMPG) filing use to calculate ownership percentage?

The filing relies on the company’s Form 10-Q, which reports 25,338,799 AmpliTech shares outstanding as of May 11, 2026 to calculate the 6.9% ownership.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/14/2026 - 02:00 PM Accepted by SEC EDGAR 08/14/2026 - 01:59 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

AmpliTech Group, Inc.

(Name of Issuer)

Common Stock, $0.001 par value per share

(Title of Class of Securities)

03211Q200

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 03211Q200

1

Names of Reporting Persons

G1 Execution Services, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

ILLINOIS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 11,129.00
6	Shared Voting Power 1,744,929.00
7	Sole Dispositive Power 11,129.00
8	Shared Dispositive Power 1,744,929.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,744,929.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

6.9 %

12

Type of Reporting Person (See Instructions)

BD, OO

Comment for Type of Reporting Person: With respect to Row 5 through Row 9 above, G1 Execution Services, LLC, SIG Brokerage, LP and Susquehanna Securities, LLC are affiliated independent broker-dealers, which may be deemed a group. For purposes of this report, we have indicated that each reporting person has sole voting and dispositive power with respect to the shares beneficially owned by it and that the reporting persons have shared voting and dispositive power with respect to all shares beneficially owned by all of the reporting persons. Each of the reporting persons disclaims beneficial ownership of shares owned directly by another reporting person.

SCHEDULE 13G

CUSIP Number(s): 03211Q200

1

Names of Reporting Persons

SIG Brokerage, LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 49,282.00
6	Shared Voting Power 1,744,929.00
7	Sole Dispositive Power 49,282.00
8	Shared Dispositive Power 1,744,929.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,744,929.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

6.9 %

12

Type of Reporting Person (See Instructions)

BD, PN

Comment for Type of Reporting Person: With respect to Row 5 through Row 9 above, G1 Execution Services, LLC, SIG Brokerage, LP and Susquehanna Securities, LLC are affiliated independent broker-dealers, which may be deemed a group. For purposes of this report, we have indicated that each reporting person has sole voting and dispositive power with respect to the shares beneficially owned by it and that the reporting persons have shared voting and dispositive power with respect to all shares beneficially owned by all of the reporting persons. Each of the reporting persons disclaims beneficial ownership of shares owned directly by another reporting person.

SCHEDULE 13G

CUSIP Number(s): 03211Q200

1

Names of Reporting Persons

Susquehanna Securities, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,684,518.00
6	Shared Voting Power 1,744,929.00
7	Sole Dispositive Power 1,684,518.00
8	Shared Dispositive Power 1,744,929.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,744,929.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

6.9 %

12

Type of Reporting Person (See Instructions)

BD, OO

Comment for Type of Reporting Person: With respect to Row 5 through Row 9 above, G1 Execution Services, LLC, SIG Brokerage, LP and Susquehanna Securities, LLC are affiliated independent broker-dealers, which may be deemed a group. For purposes of this report, we have indicated that each reporting person has sole voting and dispositive power with respect to the shares beneficially owned by it and that the reporting persons have shared voting and dispositive power with respect to all shares beneficially owned by all of the reporting persons. Each of the reporting persons disclaims beneficial ownership of shares owned directly by another reporting person.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: AmpliTech Group, Inc.
(b)	Address of issuer's principal executive offices: 155 Plant Avenue, Hauppauge, NY 11788
Item 2.
(a)	Name of person filing: This statement is filed by the entities listed below, who are collectively referred to herein as "Reporting Persons" with respect to the shares of Common Stock, $0.001 par value per share (the "Shares"), of AmpliTech Group, Inc. (the "Company"). (i) G1 Execution Services, LLC (ii) SIG Brokerage, LP (iii) Susquehanna Securities, LLC
(b)	Address or principal business office or, if none, residence: The address of the principal business office of G1 Execution Services, LLC is: 175 W. Jackson Blvd. Suite 1700 Chicago, IL 60604 The address of the principal business office of each of SIG Brokerage, LP and Susquehanna Securities, LLC is: 401 E. City Avenue Suite 220 Bala Cynwyd, PA 19004
(c)	Citizenship: Citizenship is set forth in Row 4 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.
(d)	Title of class of securities: Common Stock, $0.001 par value per share
(e)	CUSIP Number(s): 03211Q200
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: The information required by this Item 4(a) is set forth in Row 9 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person. The number of Shares reported as beneficially owned by SIG Brokerage, LP includes options to buy 27,500 Shares. The number of Shares reported as beneficially owned by Susquehanna Securities, LLC includes options to buy 1,683,000 Shares. The Company's Quarterly Report on Form 10-Q, filed on May 13, 2026, indicates that there were 25,338,799 Shares outstanding as of May 11, 2026.
(b)	Percent of class: 6.9 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: The information required by this Item 4(c)(i) is set forth in Row 5 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.
	(ii) Shared power to vote or to direct the vote: The information required by this Item 4(c)(ii) is set forth in Row 6 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.
	(iii) Sole power to dispose or to direct the disposition of: The information required by this Item 4(c)(iii) is set forth in Row 7 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.
	(iv) Shared power to dispose or to direct the disposition of: The information required by this Item 4(c)(iv) is set forth in Row 8 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

G1 Execution Services, LLC

Signature:	/s/ Brian Sopinsky
Name/Title:	Brian Sopinsky, Secretary
Date:	08/14/2026

SIG Brokerage, LP

Signature:	/s/ Brian Sopinsky
Name/Title:	Brian Sopinsky, Assistant Secretary
Date:	08/14/2026

Susquehanna Securities, LLC

Signature:	/s/ Brian Sopinsky
Name/Title:	Brian Sopinsky, Secretary
Date:	08/14/2026

Exhibit Information

EXHIBIT INDEX EXHIBIT DESCRIPTION ________ ________ 99 Joint Filing Agreement