SEPTInvestingStart Free

AMPG SCHEDULE 13G: SEC filing

Citadel Advisors LLC and affiliated entities

Filed with the SEC on · accession 0001104659-26-114133

AMPG filed a SCHEDULE 13G (schedule 13g) with the SEC on Oct 6, 2026. A report the company filed with the SEC (the US market regulator). The stock moved +0.7% by the first close after the filing.

Summary of the filing

Citadel Advisors LLC and affiliated entities filed a Schedule 13G indicating a passive ownership position in AmpliTech Group, Inc. The filing includes a joint filing agreement executed by Citadel entities and Kenneth Griffin.

For details, click here →

Key details

Filer / passive shareholderCitadel Advisors LLC
Filer / affiliateCitadel Securities LLC
Subject companyAmpliTech Group, Inc.
Founder/principal, citadelKenneth Griffin
Authorized signatory, citadelSeth Levy

How AMPG stock reacted

Close before

$2.97

Oct 5, 2026

First close after

+0.67%

$2.99

5 trading days

-8.08%

$2.73

Since filing

-22.39%

$2.31

✦ Ask GOAX AI about this filing — what it means for AMPG, what changed since its last filings and what to watch next.

Try it free for 7 days

🔔 Want to stay updated on new SEC filings for AMPG?

Click here

Frequently asked questions

What did AMPG file with the SEC on Oct 6, 2026?

AMPG filed a SCHEDULE 13G (SEC filing). Citadel Advisors LLC and affiliated entities filed a Schedule 13G indicating a passive ownership position in AmpliTech Group, Inc. The filing includes a joint filing agreement executed by Citadel entities and Kenneth Griffin.

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 $2.97 before the filing and $2.99 on Oct 6, 2026 (+0.67%). Five trading days later: $2.73 (-8.08%).

Other AMPG SEC filings

Get alerts when AMPG files with the SEC, plus live charts, key levels and news for 13,000+ stocks.

Try SEPT free for 7 days
AMPG overviewAMPG analysisAMPG newsLatest SEC filings