As of November 6, 2026, 3 holders' latest Schedule 13D or 13G filings report owning 5% or more of AmpliTech Group, Inc. The largest reported stake is G1 Execution Services, LLC's, at 6.9%. 5 filings are on record since January 30, 2026 (Schedule 13G, August 14, 2026).
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Key facts
- · Reporting person: Funicular Funds, LP · Sole voting: 1,714,394 · Shared voting: 0 · Sole dispositive: 1,714,394 · Shared dispositive: 0 · SCHEDULE 13G, 2026-10-07
- · Reporting person: Citadel Securities GP LLC · Sole voting: 0 · Shared voting: 1,443,191 · Sole dispositive: 0 · Shared dispositive: 1,443,191 · SCHEDULE 13G, 2026-10-06
- · Reporting person: G1 Execution Services, LLC · Sole voting: 11,129 · Shared voting: 1,744,929 · Sole dispositive: 11,129 · Shared dispositive: 1,744,929 · SCHEDULE 13G, 2026-08-14
- · Reporting person: The Vanguard Group · Sole voting: 0 · Shared voting: 0 · Sole dispositive: 0 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-03-26
- · Holder: The Vanguard Group · Percent: 7.06% · SCHEDULE 13G
AmpliTech Group, Inc. has 5 Schedule 13D or 13G filings on record since 2026-01-30. 3 holders' latest filing reports 5% or more of common stock, $0.001 par value per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| G1 Execution Services, LLC | 6.9% | 1,744,929 | SCHEDULE 13G, 2026-08-14 | 2026-06-30 |
| Citadel Securities GP LLC | 5.7% | 1,443,191 | SCHEDULE 13G, 2026-10-06 | 2026-06-30 |
| Funicular Funds, LP | 5.4% | 1,714,394 | SCHEDULE 13G, 2026-10-07 | 2026-09-21 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-26 | 2026-03-13 |
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More on AmpliTech Group, Inc. and the records around it.
AmpliTech Group, Inc. elsewhere on the record
- Form D filing May 2025
- Who owns it
Companies that share a holder
- Funicular Funds, LP also filed stake reports on 10 other companies: SYNLOGIC, INC. (Jul 2026), Rein Therapeutics, Inc. (May 2026), Pasithea Therapeutics Corp. (Apr 2026)
- Citadel Securities GP LLC also filed stake reports on 24 other companies: CIPHER DIGITAL INC. (Oct 2026), First Solar, Inc. (Oct 2026), IREN Limited (Sep 2026)
- G1 Execution Services, LLC also filed stake reports on 45 other companies: Bitdeer Technologies Group (Aug 2026), Compass Diversified Holdings (Aug 2026), Dave Inc. (Aug 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| G1 Execution Services, LLC | 11,129 | 1,744,929 | 11,129 | 1,744,929 | SCHEDULE 13G, 2026-08-14 |
| SIG Brokerage, LP | 49,282 | 1,744,929 | 49,282 | 1,744,929 | SCHEDULE 13G, 2026-08-14 |
| Susquehanna Securities, LLC | 1,684,518 | 1,744,929 | 1,684,518 | 1,744,929 | SCHEDULE 13G, 2026-08-14 |
| Citadel Securities GP LLC | 0 | 1,443,191 | 0 | 1,443,191 | SCHEDULE 13G, 2026-10-06 |
| Citadel Securities LLC | 0 | 1,443,191 | 0 | 1,443,191 | SCHEDULE 13G, 2026-10-06 |
| Citadel Securities Group LP | 0 | 1,443,191 | 0 | 1,443,191 | SCHEDULE 13G, 2026-10-06 |
| Citadel Advisors LLC | 0 | 0 | 0 | 0 | SCHEDULE 13G, 2026-10-06 |
| Citadel Advisors Holdings LP | 0 | 0 | 0 | 0 | SCHEDULE 13G, 2026-10-06 |
| Citadel GP LLC | 0 | 0 | 0 | 0 | SCHEDULE 13G, 2026-10-06 |
| Kenneth Griffin | 0 | 1,443,191 | 0 | 1,443,191 | SCHEDULE 13G, 2026-10-06 |
| Funicular Funds, LP | 1,714,394 | 0 | 1,714,394 | 0 | SCHEDULE 13G, 2026-10-07 |
| Cable Car Capital, LP | 1,714,394 | 0 | 1,714,394 | 0 | SCHEDULE 13G, 2026-10-07 |
| Ma-Weaver Jacob | 1,714,394 | 0 | 1,714,394 | 0 | SCHEDULE 13G, 2026-10-07 |
| The Vanguard Group | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-03-26 |
The latest filing identifies AmpliTech Group, Inc. by CUSIP 03211Q200 and gives its principal executive office as 155 PLANT AVENUE, HAUPPAUGE, NY 11788 (SCHEDULE 13G, 2026-10-07).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2026-01-30 | The Vanguard Group | 7.06% | SCHEDULE 13G |
| 2026-03-26 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-08-14 | G1 Execution Services, LLC | 6.9% | SCHEDULE 13G |
| 2026-10-06 | Citadel Securities GP LLC | 5.7% | SCHEDULE 13G |
| 2026-10-07 | Funicular Funds, LP | 5.4% | SCHEDULE 13G |
Questions about who owns AmpliTech Group, Inc.
Who owns AmpliTech Group, Inc.?
On this page, 3 holders' latest ownership filings report 5% or more of AmpliTech Group, Inc.: G1 Execution Services, LLC (6.9%, Schedule 13G, filed 2026-08-14), Citadel Securities GP LLC (5.7%, Schedule 13G, filed 2026-10-06) and Funicular Funds, LP (5.4%, Schedule 13G, filed 2026-10-07).
Who are the largest shareholders of AmpliTech Group, Inc.?
By the share each holder's latest filing reports, the largest holders of AmpliTech Group, Inc. on this page are G1 Execution Services, LLC (6.9%), Citadel Securities GP LLC (5.7%) and Funicular Funds, LP (5.4%).
When did G1 Execution Services, LLC buy into AmpliTech Group, Inc.?
The filings give report dates, not purchase dates. The earliest filing from G1 Execution Services, LLC on this page is the Schedule 13G, filed 2026-08-14, reporting 6.9%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 5 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Also on the record for AmpliTech Group, Inc.
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| May 7, 2025 | Form D, private offering | $1.50M sold | Form D page | Source |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.