AMPG — Institutional owners (13F)
Institutions that report holding this stock in their quarterly SEC Form 13F. Long positions only; a single filer may appear twice for separate option legs. Large offsetting put/call legs typically reflect market-making or hedged inventory, not directional conviction.
| Institution | Value | Shares | % of tracked 13F | Type |
|---|---|---|---|---|
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $11,713,680 | 1,683,000 | 14.76% | Call option |
| BARD ASSOCIATES INC | $10,281,765 | 1,477,265 | 12.96% | Shares |
| CITADEL ADVISORS LLC | $10,043,976 | 1,443,100 | 12.66% | Call option |
| JANE STREET GROUP, LLC | $7,044,216 | 1,012,100 | 8.88% | Call option |
| VANGUARD CAPITAL MANAGEMENT LLC | $6,657,003 | 956,466 | 8.39% | Shares |
| BlackRock, Inc. | $3,639,996 | 522,988 | 4.59% | Shares |
| PEAK6 LLC | $3,530,808 | 507,300 | 4.45% | Call option |
| LANDSCAPE CAPITAL MANAGEMENT, L.L.C. | $3,128,590 | 449,510 | 3.94% | Shares |
| VANGUARD GROUP INC | $2,296,470 | 768,050 | 2.89% | Shares |
| EQUITEC PROPRIETARY MARKETS, LLC | $1,715,640 | 246,500 | 2.16% | Call option |
| GEODE CAPITAL MANAGEMENT, LLC | $1,713,233 | 246,066 | 2.16% | Shares |
| DIMENSIONAL FUND ADVISORS LP | $1,290,530 | 185,421 | 1.63% | Shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1,270,896 | 182,600 | 1.60% | Put option |
| JANE STREET GROUP, LLC | $950,778 | 136,606 | 1.20% | Shares |
| Informed Momentum Co LLC | $936,990 | 134,625 | 1.18% | Shares |
| VANGUARD FIDUCIARY TRUST CO | $907,911 | 130,447 | 1.14% | Shares |
| SIMPLEX TRADING, LLC | $862,163 | 123,874 | 1.09% | Shares |
| STATE STREET CORP | $789,737 | 113,468 | 1.00% | Shares |
| PFG Investments, LLC | $769,776 | 110,600 | 0.97% | Shares |
| NATIONAL BANK OF CANADA /FI/ | $744,024 | 106,900 | 0.94% | Shares |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | $736,709 | 105,849 | 0.93% | Shares |
| TWO SIGMA INVESTMENTS, LP | $640,543 | 92,032 | 0.81% | Shares |
| SEI INVESTMENTS CO | $555,039 | 79,747 | 0.70% | Shares |
| Integrated Wealth Concepts LLC | $492,316 | 70,735 | 0.62% | Shares |
| UBS Group AG | $479,113 | 68,838 | 0.60% | Shares |
| ESSEX INVESTMENT MANAGEMENT CO LLC | $421,261 | 60,526 | 0.53% | Shares |
| IMC-Chicago, LLC | $358,865 | 51,561 | 0.45% | Shares |
| NORTHERN TRUST CORP | $342,279 | 49,178 | 0.43% | Shares |
| XTX Topco Ltd | $334,379 | 48,043 | 0.42% | Shares |
| JANE STREET GROUP, LLC | $321,552 | 46,200 | 0.41% | Put option |
| Warberg Asset Management LLC | $285,360 | 41,000 | 0.36% | Call option |
| LPL Financial LLC | $257,520 | 37,000 | 0.32% | Shares |
| CITIGROUP INC | $244,936 | 35,192 | 0.31% | Shares |
| Caitong International Asset Management Co., Ltd | $226,026 | 32,475 | 0.28% | Shares |
| MANGROVE PARTNERS IM, LLC | $217,180 | 31,204 | 0.27% | Shares |
| EQUITEC PROPRIETARY MARKETS, LLC | $217,152 | 31,200 | 0.27% | Put option |
| CORSAIR CAPITAL MANAGEMENT, L.P. | $213,825 | 30,722 | 0.27% | Shares |
| Midwest Financial Group LLC | $201,492 | 28,950 | 0.25% | Shares |
| Tower Research Capital LLC (TRC) | $197,448 | 28,369 | 0.25% | Shares |
| SIG BROKERAGE, LP | $191,400 | 27,500 | 0.24% | Call option |
| TUDOR INVESTMENT CORP ET AL | $179,568 | 25,800 | 0.23% | Call option |
| FORT WASHINGTON INVESTMENT ADVISORS INC /OH/ | $165,954 | 23,844 | 0.21% | Shares |
| SIG BROKERAGE, LP | $151,603 | 21,782 | 0.19% | Shares |
| Schonfeld Strategic Advisors LLC | $128,493 | 18,462 | 0.16% | Shares |
| Private Advisor Group, LLC | $121,104 | 17,400 | 0.15% | Shares |
| Squarepoint Ops LLC | $118,508 | 17,027 | 0.15% | Shares |
| Foundations Investment Advisors, LLC | $117,575 | 16,893 | 0.15% | Shares |
| Walser Wealth Management Company, A Ltd Liability Co | $117,506 | 16,883 | 0.15% | Shares |
| Bryn Mawr Trust Advisors, LLC | $102,834 | 14,775 | 0.13% | Shares |
| Jefferies Financial Group Inc. | $100,224 | 14,400 | 0.13% | Shares |
| StoneX Group Inc. | $98,770 | 20,516 | 0.12% | Shares |
| SBI Securities Co., Ltd. | $94,231 | 13,539 | 0.12% | Shares |
| Tradition Wealth Management, LLC | $88,731 | 12,749 | 0.11% | Shares |
| MILLENNIUM MANAGEMENT LLC | $83,708 | 12,027 | 0.11% | Shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $77,458 | 11,129 | 0.10% | Shares |
| MORGAN STANLEY | $72,489 | 10,415 | 0.09% | Shares |
| Vanguard Global Advisers, LLC | $69,245 | 9,949 | 0.09% | Shares |
| Daiwa Securities Group Inc. | $45,936 | 6,600 | 0.06% | Shares |
| Daiwa Securities Group Inc. | $45,936 | 6,600 | 0.06% | Put option |
| PNC Financial Services Group, Inc. | $27,840 | 4,000 | 0.04% | Shares |
| Cornerstone Planning Group LLC | $24,586 | 3,800 | 0.03% | Shares |
| EQUITEC PROPRIETARY MARKETS, LLC | $18,646 | 2,679 | 0.02% | Shares |
| ROYAL BANK OF CANADA | $16,000 | 2,244 | 0.02% | Shares |
| Crewe Advisors LLC | $13,920 | 2,000 | 0.02% | Shares |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | $8,199 | 1,178 | 0.01% | Shares |
| WELLS FARGO & COMPANY/MN | $6,960 | 1,000 | 0.01% | Shares |
| TFC Financial Management, Inc. | $6,960 | 1,000 | 0.01% | Shares |
| Arax Advisory Partners | $6,960 | 1,000 | 0.01% | Shares |
| JONES FINANCIAL COMPANIES LLLP | $6,878 | 1,050 | 0.01% | Shares |
| OSAIC HOLDINGS, INC. | $4,350 | 625 | 0.01% | Shares |
| HRT FINANCIAL LP | $3,835 | 551,106 | 0.00% | Shares |
| Tradition Wealth Management, LLC | $1,392 | 200 | 0.00% | Call option |
| THOMPSON SIEGEL & WALMSLEY LLC | $731 | 105,040 | 0.00% | Shares |
| ASSETMARK, INC | $696 | 100 | 0.00% | Shares |
| Jefferies Financial Group Inc. | $696 | 100 | 0.00% | Put option |
| FNY Investment Advisers, LLC | $643 | 92,500 | 0.00% | Shares |
| Virtu Financial LLC | $82 | 11,852 | 0.00% | Shares |
| FMR LLC | $6 | 1 | 0.00% | Shares |