AMPH — 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 |
|---|---|---|---|---|
| BlackRock, Inc. | $105,439,168 | 5,224,934 | 17.22% | Shares |
| VANGUARD GROUP INC | $69,846,471 | 2,608,158 | 11.41% | Shares |
| DIMENSIONAL FUND ADVISORS LP | $46,519,189 | 2,305,107 | 7.60% | Shares |
| STATE STREET CORP | $33,138,103 | 1,642,126 | 5.41% | Shares |
| VANGUARD CAPITAL MANAGEMENT LLC | $29,905,791 | 1,481,952 | 4.89% | Shares |
| AMERICAN CENTURY COMPANIES INC | $23,744,313 | 1,176,626 | 3.88% | Shares |
| MARSHALL WACE, LLP | $21,518,378 | 1,066,322 | 3.51% | Shares |
| GEODE CAPITAL MANAGEMENT, LLC | $19,575,036 | 969,840 | 3.20% | Shares |
| FULLER & THALER ASSET MANAGEMENT, INC. | $19,155,615 | 949,238 | 3.13% | Shares |
| D. E. Shaw & Co., Inc. | $17,900,629 | 887,048 | 2.92% | Shares |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $16,337,082 | 809,568 | 2.67% | Shares |
| RENAISSANCE TECHNOLOGIES LLC | $10,596,518 | 525,100 | 1.73% | Shares |
| GOLDMAN SACHS GROUP INC | $10,198,165 | 505,360 | 1.67% | Shares |
| SYSTEMATIC FINANCIAL MANAGEMENT LP | $8,826,439 | 437,384 | 1.44% | Shares |
| MORGAN STANLEY | $8,775,081 | 434,840 | 1.43% | Shares |
| UBS Group AG | $7,932,960 | 393,110 | 1.30% | Shares |
| DENALI ADVISORS LLC | $7,586,974 | 375,965 | 1.24% | Shares |
| NORTHERN TRUST CORP | $7,486,598 | 370,991 | 1.22% | Shares |
| Bridge City Capital, LLC | $6,835,127 | 338,708 | 1.12% | Shares |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $6,259,392 | 310,178 | 1.02% | Shares |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | $6,032,892 | 298,954 | 0.99% | Shares |
| ROYCE & ASSOCIATES LP | $5,948,216 | 294,758 | 0.97% | Shares |
| TWO SIGMA INVESTMENTS, LP | $5,006,961 | 248,115 | 0.82% | Shares |
| FIRST TRUST ADVISORS LP | $4,983,471 | 246,951 | 0.81% | Shares |
| Bank of New York Mellon Corp | $4,688,681 | 232,343 | 0.77% | Shares |
| VANGUARD FIDUCIARY TRUST CO | $4,529,966 | 224,478 | 0.74% | Shares |
| AQR CAPITAL MANAGEMENT LLC | $4,210,576 | 208,651 | 0.69% | Shares |
| PRINCIPAL FINANCIAL GROUP INC | $4,121,765 | 204,250 | 0.67% | Shares |
| NEW YORK STATE COMMON RETIREMENT FUND | $3,655,042 | 181,122 | 0.60% | Shares |
| JANE STREET GROUP, LLC | $3,606,852 | 178,734 | 0.59% | Shares |
| Empowered Funds, LLC | $3,285,546 | 162,812 | 0.54% | Shares |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC | $3,217,237 | 159,427 | 0.53% | Shares |
| Invesco Ltd. | $3,189,732 | 158,064 | 0.52% | Shares |
| VICTORY CAPITAL MANAGEMENT INC | $3,019,170 | 149,612 | 0.49% | Shares |
| Brandywine Global Investment Management, LLC | $2,823,067 | 105,417 | 0.46% | Shares |
| Universal- Beteiligungs- und Servicegesellschaft mbH | $2,813,132 | 139,402 | 0.46% | Shares |
| BANK OF AMERICA CORP /DE/ | $2,761,109 | 136,824 | 0.45% | Shares |
| ALGERT GLOBAL LLC | $2,651,652 | 131,400 | 0.43% | Shares |
| LAM GROUP, INC. | $2,562,372 | 130,800 | 0.42% | Shares |
| NORDEA INVESTMENT MANAGEMENT AB | $2,558,929 | 126,931 | 0.42% | Shares |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $2,354,058 | 116,653 | 0.38% | Shares |
| Public Sector Pension Investment Board | $2,353,957 | 116,648 | 0.38% | Shares |
| Nuveen, LLC | $1,783,852 | 88,397 | 0.29% | Shares |
| Vanguard Global Advisers, LLC | $1,768,555 | 87,639 | 0.29% | Shares |
| EXCHANGE TRADED CONCEPTS, LLC | $1,756,750 | 87,054 | 0.29% | Shares |
| RHUMBLINE ADVISERS | $1,623,544 | 80,454 | 0.27% | Shares |
| Squarepoint Ops LLC | $1,590,083 | 78,795 | 0.26% | Shares |
| Legal & General Group Plc | $1,579,712 | 78,281 | 0.26% | Shares |
| ASSETMARK, INC | $1,384,146 | 68,590 | 0.23% | Shares |
| AMERIPRISE FINANCIAL INC | $1,377,165 | 68,244 | 0.22% | Shares |
| Robeco Institutional Asset Management B.V. | $1,340,093 | 66,407 | 0.22% | Shares |
| Swiss National Bank | $1,307,664 | 64,800 | 0.21% | Shares |
| JPMORGAN CHASE & CO | $1,192,130 | 57,563 | 0.19% | Shares |
| Jump Financial, LLC | $1,145,840 | 56,781 | 0.19% | Shares |
| WELLS FARGO & COMPANY/MN | $1,128,327 | 55,913 | 0.18% | Shares |
| CITIGROUP INC | $1,125,621 | 55,779 | 0.18% | Shares |
| Point72 Asset Management, L.P. | $1,109,174 | 54,964 | 0.18% | Shares |
| ALLIANCEBERNSTEIN L.P. | $1,105,464 | 56,430 | 0.18% | Shares |
| BNP PARIBAS FINANCIAL MARKETS | $1,103,099 | 54,663 | 0.18% | Shares |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $1,084,797 | 55,375 | 0.18% | Shares |
| Creative Planning | $1,038,140 | 51,444 | 0.17% | Shares |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | $1,027,404 | 50,912 | 0.17% | Shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1,020,402 | 50,565 | 0.17% | Shares |
| INTECH INVESTMENT MANAGEMENT LLC | $1,005,751 | 49,839 | 0.16% | Shares |
| SteelPeak Wealth, LLC | $982,444 | 48,684 | 0.16% | Shares |
| XTX Topco Ltd | $944,585 | 46,808 | 0.15% | Shares |
| Polaris Capital Management, LLC | $872,422 | 43,232 | 0.14% | Shares |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | $729,527 | 36,151 | 0.12% | Shares |
| DEUTSCHE BANK AG\ | $712,495 | 35,307 | 0.12% | Shares |
| PRUDENTIAL FINANCIAL INC | $708,984 | 35,133 | 0.12% | Shares |
| Y-Intercept (Hong Kong) Ltd | $700,327 | 34,704 | 0.11% | Shares |
| Vident Advisory, LLC | $690,580 | 34,221 | 0.11% | Shares |
| Brevan Howard Capital Management LP | $690,176 | 34,201 | 0.11% | Shares |
| SEGALL BRYANT & HAMILL, LLC | $672,357 | 33,318 | 0.11% | Shares |
| SummerHaven Investment Management, LLC | $658,534 | 32,633 | 0.11% | Shares |
| MILLENNIUM MANAGEMENT LLC | $642,007 | 31,814 | 0.10% | Shares |
| Engineers Gate Manager LP | $609,254 | 30,191 | 0.10% | Shares |
| Illumine Investment Management, LLC | $594,180 | 0 | 0.10% | Shares |
| FMR LLC | $584,363 | 28,958 | 0.10% | Shares |
| Advisor OS, LLC | $512,673 | 25,405 | 0.08% | Shares |
| ADVISORY RESEARCH INC | $511,301 | 25,337 | 0.08% | Shares |
| BARCLAYS PLC | $508,879 | 25,217 | 0.08% | Shares |
| FRANKLIN RESOURCES INC | $504,218 | 24,986 | 0.08% | Shares |
| Quadrature Capital Ltd | $492,957 | 24,428 | 0.08% | Shares |
| Campbell & CO Investment Adviser LLC | $468,398 | 23,211 | 0.08% | Shares |
| VANGUARD ASSET MANAGEMENT, Ltd | $465,189 | 23,052 | 0.08% | Shares |
| Quantinno Capital Management LP | $420,289 | 20,827 | 0.07% | Shares |
| MetLife Investment Management, LLC | $418,957 | 20,761 | 0.07% | Shares |
| RAYMOND JAMES FINANCIAL INC | $389,736 | 19,313 | 0.06% | Shares |
| Russell Investments Group, Ltd. | $365,419 | 18,108 | 0.06% | Shares |
| Illinois Municipal Retirement Fund | $352,181 | 17,452 | 0.06% | Shares |
| Man Group plc | $349,962 | 17,342 | 0.06% | Shares |
| STATE OF WISCONSIN INVESTMENT BOARD | $343,847 | 17,039 | 0.06% | Shares |
| JANUS HENDERSON GROUP PLC | $330,697 | 16,868 | 0.05% | Shares |
| CITADEL ADVISORS LLC | $327,542 | 16,231 | 0.05% | Shares |
| Assenagon Asset Management S.A. | $307,059 | 15,216 | 0.05% | Shares |
| Louisiana State Employees Retirement System | $300,682 | 14,900 | 0.05% | Shares |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $300,137 | 14,873 | 0.05% | Shares |
| FOX RUN MANAGEMENT, L.L.C. | $293,740 | 14,556 | 0.05% | Shares |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | $287,504 | 14,247 | 0.05% | Shares |
| Jain Global LLC | $286,213 | 14,183 | 0.05% | Shares |
| HOHIMER WEALTH MANAGEMENT, LLC | $264,923 | 13,128 | 0.04% | Shares |
| OSAIC HOLDINGS, INC. | $257,132 | 12,742 | 0.04% | Shares |
| PROFUND ADVISORS LLC | $242,463 | 12,015 | 0.04% | Shares |
| ENVESTNET ASSET MANAGEMENT INC | $242,140 | 11,999 | 0.04% | Shares |
| CANADA PENSION PLAN INVESTMENT BOARD | $232,070 | 11,500 | 0.04% | Shares |
| ALLSTATE CORP | $229,104 | 11,353 | 0.04% | Shares |
| COMERICA BANK | $227,308 | 8,488 | 0.04% | Shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $226,016 | 11,200 | 0.04% | Call option |
| CITADEL ADVISORS LLC | $221,980 | 11,000 | 0.04% | Call option |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM | $220,224 | 10,913 | 0.04% | Shares |
| Magnetar Financial LLC | $220,083 | 10,906 | 0.04% | Shares |
| State of New Jersey Common Pension Fund D | $210,679 | 10,440 | 0.03% | Shares |
| Significant Wealth Partners LLC | $210,356 | 10,424 | 0.03% | Shares |
| CITADEL ADVISORS LLC | $209,872 | 10,400 | 0.03% | Put option |
| Police & Firemen's Retirement System of New Jersey | $207,107 | 10,263 | 0.03% | Shares |
| AlphaQuest LLC | $206,742 | 7,720 | 0.03% | Shares |
| Gotham Asset Management, LLC | $204,605 | 10,139 | 0.03% | Shares |
| Sterling Capital Management LLC | $200,024 | 9,912 | 0.03% | Shares |
| State of Tennessee, Department of Treasury | $173,932 | 8,619 | 0.03% | Shares |
| Vanguard Investments Australia, Ltd. | $172,882 | 8,567 | 0.03% | Shares |
| KLP KAPITALFORVALTNING AS | $159,422 | 7,900 | 0.03% | Shares |
| Zurcher Kantonalbank (Zurich Cantonalbank) | $157,061 | 7,783 | 0.03% | Shares |
| OREGON PUBLIC EMPLOYEES RETIREMENT FUND | $156,234 | 7,742 | 0.03% | Shares |
| FIFTH THIRD BANCORP | $147,320 | 7,300 | 0.02% | Shares |
| State of Wyoming | $141,704 | 7,022 | 0.02% | Shares |
| China Universal Asset Management Co., Ltd. | $141,603 | 7,017 | 0.02% | Shares |
| PNC Financial Services Group, Inc. | $100,981 | 5,004 | 0.02% | Shares |
| ROYAL BANK OF CANADA | $97,000 | 4,739 | 0.02% | Shares |
| New Age Alpha Advisors, LLC | $63,506 | 3,147 | 0.01% | Shares |
| Ameritas Investment Partners, Inc. | $62,578 | 3,101 | 0.01% | Shares |
| Parallel Advisors, LLC | $60,298 | 2,988 | 0.01% | Shares |
| FEDERATED HERMES, INC. | $58,724 | 2,910 | 0.01% | Shares |
| TD PRIVATE CLIENT WEALTH LLC | $48,008 | 2,379 | 0.01% | Shares |
| Mirae Asset Global Investments Co., Ltd. | $39,795 | 1,972 | 0.01% | Shares |
| Quantbot Technologies LP | $38,826 | 1,924 | 0.01% | Shares |
| Arax Advisory Partners | $36,465 | 1,807 | 0.01% | Shares |
| Fulcrum Asset Management LLP | $36,243 | 1,750 | 0.01% | Shares |
| Tower Research Capital LLC (TRC) | $30,553 | 1,514 | 0.00% | Shares |
| Blue Trust, Inc. | $25,698 | 1,273 | 0.00% | Shares |
| Pinnacle Wealth Planning Services, Inc. | $23,510 | 1,165 | 0.00% | Shares |
| US BANCORP \DE\ | $22,581 | 1,119 | 0.00% | Shares |
| GF FUND MANAGEMENT CO. LTD. | $19,433 | 963 | 0.00% | Shares |
| CIBC Private Wealth Group LLC | $19,215 | 721 | 0.00% | Shares |
| Vanguard National Trust Co | $17,879 | 886 | 0.00% | Shares |
| Farther Finance Advisors, LLC | $15,656 | 774 | 0.00% | Shares |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO | $15,216 | 754 | 0.00% | Shares |
| LSV ASSET MANAGEMENT | $12,956 | 642,014 | 0.00% | Shares |
| CWM, LLC | $12,890 | 658 | 0.00% | Shares |
| 1620 INVESTMENT ADVISORS, INC. | $12,411 | 615 | 0.00% | Shares |
| Allworth Financial LP | $11,362 | 563 | 0.00% | Shares |
| HUNTINGTON NATIONAL BANK | $10,595 | 525 | 0.00% | Shares |
| NISA INVESTMENT ADVISORS, LLC | $10,130 | 502 | 0.00% | Shares |
| MassMutual Private Wealth & Trust, FSB | $8,738 | 433 | 0.00% | Shares |
| HRT FINANCIAL LP | $7,820 | 387,530 | 0.00% | Shares |
| GAMMA Investing LLC | $6,296 | 312 | 0.00% | Shares |
| Lindbrook Capital, LLC | $6,059 | 209 | 0.00% | Shares |
| UMB Bank, n.a. | $5,893 | 292 | 0.00% | Shares |
| Global Retirement Partners, LLC | $5,872 | 291 | 0.00% | Shares |
| Smartleaf Asset Management LLC | $5,654 | 273 | 0.00% | Shares |
| Versant Capital Management, Inc | $5,627 | 218 | 0.00% | Shares |
| SIGNATUREFD, LLC | $5,590 | 277 | 0.00% | Shares |
| JONES FINANCIAL COMPANIES LLLP | $4,966 | 228 | 0.00% | Shares |
| Pacer Advisors, Inc. | $4,867 | 241,181 | 0.00% | Shares |
| Aster Capital Management (DIFC) Ltd | $4,803 | 238 | 0.00% | Shares |
| LOS ANGELES CAPITAL MANAGEMENT LLC | $4,379 | 217 | 0.00% | Shares |
| Spire Wealth Management | $4,157 | 206 | 0.00% | Shares |
| Optiver Holding B.V. | $3,875 | 192 | 0.00% | Shares |
| ROTHSCHILD INVESTMENT LLC | $3,572 | 177 | 0.00% | Shares |
| EverSource Wealth Advisors, LLC | $3,067 | 152 | 0.00% | Shares |
| City State Bank | $3,027 | 150 | 0.00% | Shares |
| BESSEMER GROUP INC | $2,448 | 121,345 | 0.00% | Shares |
| WealthCollab, LLC | $2,341 | 116 | 0.00% | Shares |
| Bank of New Hampshire | $2,220 | 110 | 0.00% | Shares |
| Parkside Financial Bank & Trust | $2,160 | 107 | 0.00% | Shares |
| Steward Partners Investment Advisory, LLC | $2,018 | 100 | 0.00% | Shares |
| MCF Advisors LLC | $2,018 | 100 | 0.00% | Shares |
| Essential Partners LLC | $1,816 | 90 | 0.00% | Shares |
| Salomon & Ludwin, LLC | $1,628 | 81 | 0.00% | Shares |
| IFP Advisors, Inc | $1,413 | 70 | 0.00% | Shares |
| FTB Advisors, Inc. | $1,331 | 58 | 0.00% | Shares |
| HighMark Wealth Management LLC | $1,109 | 55 | 0.00% | Shares |
| PRICE T ROWE ASSOCIATES INC /MD/ | $1,032 | 51,103 | 0.00% | Shares |
| SBI Securities Co., Ltd. | $1,029 | 51 | 0.00% | Shares |
| ZIONS BANCORPORATION, NATIONAL ASSOCIATION /UT/ | $747 | 37 | 0.00% | Shares |
| Wealth Enhancement Trust Services, Inc. | $706 | 35 | 0.00% | Shares |
| Janney Montgomery Scott LLC | $683 | 33,841 | 0.00% | Shares |
| SG Americas Securities, LLC | $640 | 31,709 | 0.00% | Shares |
| Keating Financial Advisory Services, Inc. | $565 | 28 | 0.00% | Shares |
| BROWN, LISLE/CUMMINGS, INC. | $545 | 27 | 0.00% | Shares |
| CANADA LIFE ASSURANCE Co | $541 | 26,787 | 0.00% | Shares |
| State of Alaska, Department of Revenue | $531 | 26,433 | 0.00% | Shares |
| FARMERS & MERCHANTS INVESTMENTS INC | $505 | 25 | 0.00% | Shares |
| Bare Financial Services, Inc | $464 | 23 | 0.00% | Shares |
| Thrivent Financial for Lutherans | $450 | 22,295 | 0.00% | Shares |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM | $427 | 21,180 | 0.00% | Shares |
| Larson Financial Group LLC | $404 | 20 | 0.00% | Shares |
| Clearstead Advisors, LLC | $344 | 17 | 0.00% | Shares |
| Continuum Advisory, LLC | $343 | 17 | 0.00% | Shares |
| Trust Co | $294 | 15 | 0.00% | Shares |
| Torren Management, LLC | $294 | 15 | 0.00% | Shares |
| Sunbelt Securities, Inc. | $274 | 14 | 0.00% | Shares |
| Legacy Investment Solutions, LLC | $230 | 10 | 0.00% | Shares |
| Elequin Capital, LP | $222 | 11 | 0.00% | Shares |
| TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY | $182 | 9,053 | 0.00% | Shares |
| GILPIN WEALTH MANAGEMENT, LLC | $162 | 8 | 0.00% | Shares |
| Rockefeller Capital Management L.P. | $141 | 7 | 0.00% | Shares |
| SJS Investment Consulting Inc. | $122 | 6 | 0.00% | Shares |
| Vestcor Inc | $116 | 5,743 | 0.00% | Shares |
| PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO | $106 | 5,265 | 0.00% | Shares |
| JPL Wealth Management, LLC | $101 | 5 | 0.00% | Shares |
| Abound Wealth Management | $79 | 4 | 0.00% | Shares |
| HANTZ FINANCIAL SERVICES, INC. | $49 | 2,417 | 0.00% | Shares |
| SHELL ASSET MANAGEMENT CO | $40 | 1,492 | 0.00% | Shares |
| Davis Capital Management | $40 | 2 | 0.00% | Shares |
| Hughes Financial Services, LLC | $20 | 1 | 0.00% | Shares |
| CX Institutional | $15 | 573 | 0.00% | Shares |
| HARBOR CAPITAL ADVISORS, INC. | $8 | 391 | 0.00% | Shares |
| Covestor Ltd | $1 | 65 | 0.00% | Shares |
| Capital Advisors, Ltd. LLC | $0 | 24 | 0.00% | Shares |
| Evolution Advisers, Inc. | $0 | 4 | 0.00% | Shares |