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AMPG SCHEDULE 13G: SEC filing

A joint filing agreement was

Filed with the SEC on · accession 0001446580-26-000090

AMPG filed a SCHEDULE 13G (schedule 13g) with the SEC on Aug 14, 2026. A joint filing agreement was filed under Schedule 13G by G1 Execution Services, LLC, SIG Brokerage, LP, and Susquehanna Securities, LLC regarding beneficial ownership of AmpliTech Group common stock. The stock moved -33.3% by the first close after the filing.

Summary of the filing

A joint filing agreement was filed under Schedule 13G by G1 Execution Services, LLC, SIG Brokerage, LP, and Susquehanna Securities, LLC regarding beneficial ownership of AmpliTech Group common stock. The filing is a passive ownership disclosure with no stated plans to influence the company.

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Key details

Subject companyAmpliTech Group, Inc.
Filing entityG1 Execution Services, LLC
Filing entitySIG Brokerage, LP
Filing entitySusquehanna Securities, LLC
Secretary/assistant secretary of filing entitiesBrian Sopinsky

How AMPG stock reacted

Close before

$5.99

Aug 13, 2026

First close after

-33.31%

$4.00

5 trading days

-42.57%

$3.44

Since filing

-61.52%

$2.31

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Frequently asked questions

What did AMPG file with the SEC on Aug 14, 2026?

AMPG filed a SCHEDULE 13G (SEC filing). A joint filing agreement was filed under Schedule 13G by G1 Execution Services, LLC, SIG Brokerage, LP, and Susquehanna Securities, LLC regarding beneficial ownership of AmpliTech Group common stock. The filing is a passive ownership disclosure with no stated plans to influence the company.

How do I read a SCHEDULE 13G?

A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A SCHEDULE 13G (schedule 13g): A report the company filed with the SEC (the US market regulator).

How did AMPG stock react to this filing?

AMPG closed at $5.99 before the filing and $4.00 on Aug 14, 2026 (-33.31%). Five trading days later: $3.44 (-42.57%).

Other AMPG SEC filings

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