Who owns AmpliTech Group (AMPG)
Which tracked institutional funds hold AMPG, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See AMPG company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on AMPG is one-sided between 2026-Q1 and 2026-Q2: 24 added or opened and 3 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
AMPG’s largest tracked holder by dollar value, SymBiosis Capital Partners, LLC, sizes it at 25.1% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 25.1pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in AMPG divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 65 tracked filers holding AMPG, 48 increased or opened the position and 17 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in AMPG between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 6
- JANE STREET GROUP, LLC$951K
- Informed Momentum Co LLC$937K
- SIMPLEX TRADING, LLC$862K
- PFG Investments, LLC$770K
- NATIONAL BANK OF CANADA /FI/$744K
- SEI INVESTMENTS CO$555K
Full exits 2
- Creek Drive Management Group LLC$1M
- RENAISSANCE TECHNOLOGIES LLC$708K
Largest adds
- Cable Car Capital, LP$11M
- BARD ASSOCIATES INC$7M
- VANGUARD CAPITAL MANAGEMENT LLC$5M
- HEIGHTS CAPITAL MANAGEMENT, INC$4M
- BlackRock, Inc.$3M
- LANDSCAPE CAPITAL MANAGEMENT, L.L.C.$3M
Largest trims
- Integrated Wealth Concepts LLC$315K
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BARD ASSOCIATES INC trimmed | 1,477,265 | $10M | 14.3% | 2026-Q2 |
| Cable Car Capital, LP added | 1,000,000 | $7M | 9.7% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 956,466 | $7M | 9.3% | 2026-Q2 |
| BlackRock, Inc. added | 522,988 | $4M | 5.1% | 2026-Q2 |
| LANDSCAPE CAPITAL MANAGEMENT, L.L.C. added | 449,510 | $3M | 4.4% | 2026-Q2 |
| HEIGHTS CAPITAL MANAGEMENT, INC trimmed | 1,220,188 | $2M | 3.4% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 246,066 | $2M | 2.4% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 185,421 | $1M | 1.8% | 2026-Q2 |
| JANE STREET GROUP, LLC trimmed | 136,606 | $951K | 1.3% | 2026-Q2 |
| Informed Momentum Co LLC trimmed | 134,625 | $937K | 1.3% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 130,447 | $908K | 1.3% | 2026-Q2 |
| SIMPLEX TRADING, LLC added | 123,874 | $862K | 1.2% | 2026-Q2 |
| STATE STREET CORP added | 113,468 | $790K | 1.1% | 2026-Q2 |
| PFG Investments, LLC added | 110,600 | $770K | 1.1% | 2026-Q2 |
| NATIONAL BANK OF CANADA /FI/ new | 106,900 | $744K | 1.0% | 2026-Q2 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 105,849 | $737K | 1.0% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 92,032 | $641K | 0.9% | 2026-Q2 |
| Warberg Asset Management LLC added | 309,044 | $596K | 0.8% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 79,747 | $555K | 0.8% | 2026-Q2 |
| Integrated Wealth Concepts LLC trimmed | 70,735 | $492K | 0.7% | 2026-Q2 |
| EQUITEC PROPRIETARY MARKETS, LLC added | 334,760 | $485K | 0.7% | 2026-Q2 |
| UBS Group AG added | 68,838 | $479K | 0.7% | 2026-Q2 |
| ESSEX INVESTMENT MANAGEMENT CO LLC trimmed | 60,526 | $421K | 0.6% | 2026-Q2 |
| IMC-Chicago, LLC new | 51,561 | $359K | 0.5% | 2026-Q2 |
| NORTHERN TRUST CORP added | 49,178 | $342K | 0.5% | 2026-Q2 |
| XTX Topco Ltd added | 48,043 | $334K | 0.5% | 2026-Q2 |
| LPL Financial LLC added | 37,000 | $258K | 0.4% | 2026-Q2 |
| CITIGROUP INC added | 35,192 | $245K | 0.3% | 2026-Q2 |
| Caitong International Asset Management Co., Ltd added | 32,475 | $226K | 0.3% | 2026-Q2 |
| MANGROVE PARTNERS IM, LLC new | 31,204 | $217K | 0.3% | 2026-Q2 |
| CORSAIR CAPITAL MANAGEMENT, L.P. trimmed | 30,722 | $214K | 0.3% | 2026-Q2 |
| Midwest Financial Group LLC new | 28,950 | $201K | 0.3% | 2026-Q2 |
| Tower Research Capital LLC (TRC) added | 28,369 | $197K | 0.3% | 2026-Q2 |
| FORT WASHINGTON INVESTMENT ADVISORS INC /OH/ new | 23,844 | $166K | 0.2% | 2026-Q2 |
| SIG BROKERAGE, LP new | 21,782 | $152K | 0.2% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC new | 18,462 | $128K | 0.2% | 2026-Q2 |
| Private Advisor Group, LLC new | 17,400 | $121K | 0.2% | 2026-Q2 |
| Squarepoint Ops LLC added | 17,027 | $119K | 0.2% | 2026-Q2 |
| Foundations Investment Advisors, LLC new | 16,893 | $118K | 0.2% | 2026-Q2 |
| Walser Wealth Management Company, A Ltd Liability Co new | 16,883 | $118K | 0.2% | 2026-Q2 |
| Bryn Mawr Trust Advisors, LLC | 14,775 | $103K | 0.1% | 2026-Q2 |
| Jefferies Financial Group Inc. new | 14,400 | $100K | 0.1% | 2026-Q2 |
| Legato Capital Management LLC trimmed | 14,284 | $99K | 0.1% | 2026-Q2 |
| StoneX Group Inc. new | 20,516 | $99K | 0.1% | 2026-Q2 |
| SBI Securities Co., Ltd. trimmed | 13,539 | $94K | 0.1% | 2026-Q2 |
| Tradition Wealth Management, LLC new | 12,749 | $89K | 0.1% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 12,027 | $84K | 0.1% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 11,129 | $77K | 0.1% | 2026-Q2 |
| MORGAN STANLEY trimmed | 10,415 | $72K | 0.1% | 2026-Q2 |
| Vanguard Global Advisers, LLC | 9,949 | $69K | 0.1% | 2026-Q2 |
| Daiwa Securities Group Inc. new | 6,600 | $46K | 0.1% | 2026-Q2 |
| PNC Financial Services Group, Inc. new | 4,000 | $28K | 0.0% | 2026-Q2 |
| Cornerstone Planning Group LLC | 3,800 | $25K | 0.0% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 2,244 | $16K | 0.0% | 2026-Q2 |
| Crewe Advisors LLC new | 2,000 | $14K | 0.0% | 2026-Q2 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO added | 1,178 | $8K | 0.0% | 2026-Q2 |
| TFC Financial Management, Inc. | 1,000 | $7K | 0.0% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN | 1,000 | $7K | 0.0% | 2026-Q2 |
| Arax Advisory Partners new | 1,000 | $7K | 0.0% | 2026-Q2 |
| JONES FINANCIAL COMPANIES LLLP added | 1,050 | $7K | 0.0% | 2026-Q2 |
| OSAIC HOLDINGS, INC. trimmed | 625 | $4K | 0.0% | 2026-Q2 |
| ASSETMARK, INC new | 100 | $696 | 0.0% | 2026-Q2 |
| Clear Street Group Inc. trimmed | 262 | $516 | 0.0% | 2026-Q2 |
| FMR LLC new | 1 | $6 | 0.0% | 2026-Q2 |
| NewEdge Advisors, LLC new | 0 | — | 0.0% | 2026-Q2 |
| Creek Drive Management Group LLC added | 735,500 | $1M | 1.9% | 2026-Q1 stale (1 quarter behind) |
| RENAISSANCE TECHNOLOGIES LLC added | 372,600 | $708K | 1.0% | 2026-Q1 stale (1 quarter behind) |
| Pekin Hardy Strauss, Inc. added | 160,800 | $306K | 0.4% | 2026-Q1 stale (1 quarter behind) |
| GSA CAPITAL PARTNERS LLP trimmed | 89,192 | $169K | 0.2% | 2026-Q1 stale (1 quarter behind) |
| CITADEL ADVISORS LLC added | 20,460 | $39K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| Virtu Financial LLC trimmed | 14,738 | $28K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| MARSHALL WACE, LLP trimmed | 14,442 | $27K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| THOMPSON DAVIS & CO., INC. trimmed | 12,000 | $23K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| SymBiosis Capital Partners, LLC new | 2,555,000 | $13M | 18.4% | 2025-Q4 stale (2 quarters behind) |
| VANGUARD GROUP INC added | 768,050 | $2M | 3.2% | 2025-Q4 stale (2 quarters behind) |
| Evernest Financial Advisors, LLC new | 74,000 | $229K | 0.3% | 2025-Q4 stale (2 quarters behind) |
| Engineers Gate Manager LP new | 20,658 | $62K | 0.1% | 2025-Q4 stale (2 quarters behind) |
| BOOTHBAY FUND MANAGEMENT, LLC new | 12,843 | $38K | 0.1% | 2025-Q4 stale (2 quarters behind) |
| MLG Wealth Management DBA Pine Grove Financial Group new | 12,000 | $36K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| Murchinson Ltd. trimmed | 46,693 | $4K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| MARYLAND CAPITAL ADVISORS INC. | 200 | $598 | 0.0% | 2025-Q4 stale (2 quarters behind) |
| BANK OF AMERICA CORP /DE/ trimmed | 17 | $51 | 0.0% | 2025-Q4 stale (2 quarters behind) |
| AIGH Capital Management LLC | 905,453 | $2M | 2.7% | 2025-Q2 stale (4 quarters behind) |
| Asset Management One Co., Ltd. added | 66,184 | $140K | 0.2% | 2025-Q2 stale (4 quarters behind) |
| TWO SIGMA SECURITIES, LLC trimmed | 14,382 | $30K | 0.0% | 2025-Q2 stale (4 quarters behind) |
| CLEAR STREET LLC trimmed | 39,600 | $21K | 0.0% | 2025-Q2 stale (4 quarters behind) |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 stale (4 quarters behind) |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.