AmpliTech Group, Inc. (AMPG) Ownership
AMPG ownership summary
as of October 17, 2026- Institutions
- 26.5% of shares outstanding
- Insiders
- 10.55% of shares outstanding
- Shares outstanding
- 30.1M
- Float
- 26.9M shares available to trade
- Short interest
- 14.89% 4.0M shares short
- Days to cover
- 5.24 short interest down 7.3% vs prior month
- Institutions 26.49%
- Insiders 10.55%
- Other investors 62.96%
AMPG top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Bard Associates Inc | 4.92% | 1.5M | $3.5M | −119,930 (−7.5%) | June 30, 2026 |
| 2 | Vanguard Capital Management, LLC | 3.18% | 956K | $2.3M | +151,030 (+18.8%) | June 30, 2026 |
| 3 | HRT FINANCIAL LLC | 1.83% | 551K | $1.3M | +551,106 (0.0%) | June 30, 2026 |
| 4 | BlackRock Inc | 1.74% | 523K | $1.2M | +414,855 (+383.7%) | June 30, 2026 |
| 5 | LANDSCAPE CAPITAL MANAGEMENT,LLC | 1.50% | 450K | $1.1M | +404,556 (+899.9%) | June 30, 2026 |
| 6 | Geode Capital Management, LLC | 0.82% | 246K | $588,098 | +3,340 (+1.4%) | June 30, 2026 |
| 7 | Dimensional Fund Advisors, Inc. | 0.62% | 185K | $443,156 | −30,127 (−14.0%) | June 30, 2026 |
| 8 | Jane Street Group LLC | 0.45% | 137K | $326,488 | +136,606 (0.0%) | June 30, 2026 |
| 9 | The Informed Momentum Company (formerly EAM Investors) | 0.45% | 135K | $321,754 | +134,625 (0.0%) | June 30, 2026 |
| 10 | Vanguard Fiduciary Trust Co | 0.43% | 130K | $311,768 | +19,190 (+17.2%) | June 30, 2026 |
| 11 | SIMPLEX TRADING, LLC | 0.41% | 124K | $296,059 | +123,874 (0.0%) | June 30, 2026 |
| 12 | State Street Corp | 0.38% | 113K | $271,189 | +24,300 (+27.3%) | June 30, 2026 |
| 13 | PFG Investments, LLC | 0.37% | 111K | $264,334 | +110,600 (0.0%) | June 30, 2026 |
| 14 | NATIONAL BANK OF CANADA /FI/ | 0.36% | 107K | $255,491 | +106,900 (0.0%) | June 30, 2026 |
| 15 | Bridgeway Capital Management, LLC | 0.35% | 106K | $252,979 | — | June 30, 2026 |
| 16 | Thompson, Siegel & Walmsley LLC | 0.35% | 105K | $251,046 | +105,040 (0.0%) | June 30, 2026 |
| 17 | Two Sigma Investments LLC | 0.31% | 92K | $219,956 | +42,993 (+87.7%) | June 30, 2026 |
| 18 | SEI Investments Co | 0.27% | 80K | $190,595 | +79,747 (0.0%) | June 30, 2026 |
| 19 | Integrated Wealth Concepts LLC | 0.24% | 71K | $169,057 | −354,075 (−83.3%) | June 30, 2026 |
| 20 | UBS Group AG | 0.23% | 69K | $164,523 | +42,675 (+163.1%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 16 holders added 2.5M shares and 3 cut 504K.
AMPG top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 2.27% | 682K | $1.6M | — | August 31, 2026 |
| 2 | Fidelity Extended Market Index | 0.36% | 110K | $261,927 | +3,654 (+3.4%) | August 31, 2026 |
| 3 | Bridgeway Ultra-Small Company | 0.35% | 106K | $252,979 | — | June 30, 2026 |
| 4 | iShares Micro-Cap ETF | 0.24% | 73K | $174,068 | −502 (−0.7%) | September 30, 2026 |
| 5 | DFA US Small Cap I | 0.23% | 69K | $164,057 | — | August 31, 2026 |
| 6 | Dimensional US Small Cap ETF | 0.19% | 57K | $137,184 | — | September 30, 2026 |
| 7 | Fidelity Total Market Index | 0.14% | 42K | $100,041 | — | August 31, 2026 |
| 8 | Fidelity Series Total Market Index | 0.12% | 35K | $83,399 | +2,487 (+7.7%) | August 31, 2026 |
| 9 | Mandarine Global Microcap G EUR | 0.09% | 28K | $66,920 | −2,000 (−6.7%) | June 30, 2026 |
| 10 | DFA US Micro Cap I | 0.08% | 24K | $58,048 | — | August 31, 2026 |
| 11 | Vanguard Balanced Index Inv | 0.04% | 12K | $27,796 | — | August 31, 2026 |
| 12 | Vanguard MStar Inst Ttl StkMktIdxInstlPl | 0.04% | 11K | $26,720 | — | August 31, 2026 |
| 13 | Vanguard U.S. Eq Idx £ Acc | 0.03% | 9,949 | $23,778 | — | August 31, 2026 |
| 14 | Fidelity Nasdaq Composite Index | 0.03% | 9,192 | $21,969 | −4,560 (−33.2%) | August 31, 2026 |
| 15 | Dimensional Global Core Equity USD Acc | 0.03% | 7,720 | $18,451 | — | August 31, 2026 |
| 16 | DFA US Vector Equity Class F | 0.02% | 5,389 | $12,880 | — | July 31, 2026 |
| 17 | 1290 VT Micro Cap K | 0.02% | 5,142 | $12,289 | — | August 31, 2026 |
| 18 | DFA US Vector Equity I | 0.02% | 4,988 | $11,921 | — | August 31, 2026 |
| 19 | Dimensional US Sustainability Core 1 ETF | 0.01% | 3,686 | $8,810 | — | September 30, 2026 |
| 20 | Dimensional US Core Equity USD Acc | 0.01% | 3,420 | $8,174 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
AMPG insider transactions
latest 1| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2025-06-20 | Daniel Richard Mazziota | Buy | $2.00 | 7,157 | $14,314 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
AMPG shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns AMPG
Institutional investors own 26.5% of AmpliTech's shares and insiders 10.55%. The largest holder is Bard Associates Inc with 4.92% of the shares (1.5M), as of June 30, 2026. Among the top 20 institutions, 16 added shares and 3 reduced their stake in the latest filings. Short interest is 14.89% of the float, or 5.24 days of average trading volume. The share count rose 818.4% since 2014.
Related: AMPG analyst forecast, AMPG key metrics. See the AMPG stock overview for the latest quote and news.
AMPG ownership FAQ
Who owns the most AmpliTech stock?
The largest shareholders of AmpliTech are Bard Associates Inc (4.92%), Vanguard Capital Management, LLC (3.18%), HRT FINANCIAL LLC (1.83%), BlackRock Inc (1.74%), LANDSCAPE CAPITAL MANAGEMENT,LLC (1.50%).
What percentage of AmpliTech is owned by institutions?
Institutions hold 26.5% of AmpliTech's shares outstanding; insiders hold 10.55%.
Which funds own AmpliTech?
The largest fund holders of AmpliTech are Vanguard MStar Total Stk Mkt Idx Invest (2.27%), Fidelity Extended Market Index (0.36%), Bridgeway Ultra-Small Company (0.35%), iShares Micro-Cap ETF (0.24%), DFA US Small Cap I (0.23%).
What is AmpliTech's short interest?
4.0M shares of AmpliTech were sold short, 14.89% of the float; at the average daily volume it would take 5.24 days to cover.
Are insiders buying or selling AmpliTech?
Of the latest 1 reported insider transactions in AmpliTech (since June 20, 2025), 1 were purchases and 0 were sales.
How many shares of AmpliTech are outstanding?
AmpliTech has 30.1M shares outstanding, of which 26.9M are in the public float.