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Amplitech Group Inc (AMPG)

CUSIP: 03211Q200 | NYSE | Technology · Communication Equipment | Micro Cap | 110 institutional holders

Quarters

Q3 2026Q2 2026Q1 2026Q4 2025Q3 2025
CompareDetailedHistoricalFundsOptions13D/13GPeersTargetingTrading SummaryProfile

Beneficial Ownership — 13D / 13G

Full history →

5%+ stakes reported outside the quarterly cycle. A 13D is due within five business days of the event below, so these figures lead the holders table until the filer's next 13F catches up to them.

HolderShares% of ClassChangeEvent Datevs 13F
13GCable Car Capital, LP1,714,3945.4%New 5%+ stakeSep 21, 2026No 13F filer matched
13GG1 Execution Services, LLC1,744,9296.9%New 5%+ stakeJun 30, 2026No 13F filer matched
13GCitadel Securities LLC
with Citadel GP LLC, Citadel Advisors Holdings LP, Citadel Advisors LLC
1,443,1915.7%New 5%+ stakeJun 30, 2026No 13F filer matched
13GCable Car Capital, LP1,714,394
5.4% of class · Sep 21, 2026New 5%+ stake
No 13F filer matched
13GG1 Execution Services, LLC1,744,929
6.9% of class · Jun 30, 2026New 5%+ stake
No 13F filer matched
13GCitadel Securities LLC1,443,191
5.7% of class · Jun 30, 2026New 5%+ stake
with Citadel GP LLC, Citadel Advisors Holdings LP, Citadel Advisors LLC
No 13F filer matched

Institutional Holders — Q3 2026

Dimensional Fund Advisors LP185,421
0.0% of portfolio›$582.2K
Essex Investment Management Co LLC60,526
0.0% of portfolio›$190.1K
Asset Management One Co., Ltd.45,865
0.0% of portfolio›$144.0K
Simplex Trading, LLC38,463
0.0% of portfolio›$120.8K
Caitong International Asset Management Co., Ltd37,722
0.0% of portfolio›$118.4K
Walser Wealth Management Company, A Ltd Liability Co26,066
0.0% of portfolio›$81.8K
Fort Washington Investment Advisors Inc23,844
0.0% of portfolio›$74.9K
Bryn Mawr Trust Advisors, LLC14,775
0.0% of portfolio›$46.4K
Asset One Wealth Management LLC13,050
0.0% of portfolio›$41.0K
Citigroup Inc12,972
0.0% of portfolio›$40.7K
Equitec Proprietary Markets, LLC10,000
0.0% of portfolio›$31.4K
SBI Securities Co., Ltd.6,246
0.0% of portfolio›$19.6K
TD Waterhouse Canada Inc.1,300
0.0% of portfolio›$4.0K
TFC Financial Management, Inc.1,000
0.0% of portfolio›$3.1K
Burk Holdings LLC187
0.0% of portfolio›$587
Assetmark, Inc161
0.0% of portfolio›$506
StyleTurnoverLocationFiled
Dimensional Fund Advisors LP
185,421$582.2K0.0%IndexLowAustin, TX2026-11-04
Essex Investment Management Co LLC
60,526$190.1K0.0%GrowthMediumBoston, MA2026-10-19
Asset Management One Co., Ltd.
45,865$144.0K0.0%IndexVery LowTokyo, Mexico2026-10-27
Simplex Trading, LLC
38,463$120.8K0.0%CoreVery HighChicago, IL2026-11-04
Caitong International Asset Management Co., Ltd
37,722$118.4K0.0%GrowthVery HighHong Kong, South Korea2026-10-29
Walser Wealth Management Company, A Ltd Liability Co
26,066$81.8K0.0%GrowthHighTampa, FL2026-10-15
Fort Washington Investment Advisors Inc
23,844$74.9K0.0%CoreLowCincinnati, OH2026-10-15
Bryn Mawr Trust Advisors, LLC
14,775$46.4K0.0%CoreLowPhiladelphia, PA2026-11-04
Asset One Wealth Management LLC
13,050$41.0K0.0%GrowthLowBellevue, WA2026-11-02
Citigroup Inc
12,972$40.7K0.0%CoreMediumNew York, NY2026-11-04
Equitec Proprietary Markets, LLC
10,000$31.4K0.0%Agg GrowthVery HighChicago, IL2026-11-04
SBI Securities Co., Ltd.
6,246$19.6K0.0%Agg GrowthLowTokyo, Mexico2026-10-22
TD Waterhouse Canada Inc.
1,300$4.0K0.0%CoreLowToronto, Australia2026-10-16
TFC Financial Management, Inc.
1,000$3.1K0.0%ETFVery LowBoston, MA2026-10-26
Burk Holdings LLC
187$5870.0%ETFVery LowTulsa, OK2026-11-05
Assetmark, Inc
161$5060.0%ETFLowConcord, CA2026-10-21