AMSC — Institutional owners (13F)

307 filers · $1.6B total · As of Sept. 30, 2026

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. $169,998,850 4,095,371 10.55% Shares
VANGUARD GROUP INC $101,496,470 3,526,632 6.30% Shares
VANGUARD CAPITAL MANAGEMENT LLC $84,440,431 2,034,219 5.24% Shares
BARROW HANLEY MEWHINNEY & STRAUSS LLC $70,733,289 1,704,006 4.39% Shares
UBS Group AG $59,321,525 1,429,090 3.68% Shares
VANGUARD PORTFOLIO MANAGEMENT LLC $58,897,003 1,418,863 3.65% Shares
STATE STREET CORP $56,379,920 1,358,225 3.50% Shares
GOLDMAN SACHS GROUP INC $53,715,891 1,294,047 3.33% Shares
GEODE CAPITAL MANAGEMENT, LLC $51,615,468 1,243,198 3.20% Shares
FIRST TRUST ADVISORS LP $48,501,280 1,168,424 3.01% Shares
OBERWEIS ASSET MANAGEMENT INC/ $40,991,125 987,500 2.54% Shares
AWM Investment Company, Inc. $39,501,082 951,604 2.45% Shares
BAILLIE GIFFORD & CO $38,741,615 933,308 2.40% Shares
EMERALD ADVISERS, LLC $35,032,614 843,956 2.17% Shares
Legal & General Group Plc $31,417,382 756,863 1.95% Shares
DIMENSIONAL FUND ADVISORS LP $26,809,456 645,991 1.66% Shares
MORGAN STANLEY $26,393,466 635,833 1.64% Shares
Nuveen, LLC $26,085,133 628,406 1.62% Shares
Telemark Asset Management, LLC $24,906,000 600,000 1.55% Shares
ROYCE & ASSOCIATES LP $23,072,130 555,821 1.43% Shares
EMERALD MUTUAL FUND ADVISERS TRUST $22,372,022 538,955 1.39% Shares
NORTHERN TRUST CORP $18,006,706 433,792 1.12% Shares
JANE STREET GROUP, LLC $17,450,804 420,400 1.08% Call option
Ranger Investment Management, L.P. $16,822,592 405,266 1.04% Shares
Stephens Investment Management Group LLC $16,718,651 402,762 1.04% Shares
CHARLES SCHWAB INVESTMENT MANAGEMENT INC $16,567,679 399,125 1.03% Shares
PANAGORA ASSET MANAGEMENT INC $15,587,628 375,515 0.97% Shares
JANE STREET GROUP, LLC $15,503,985 373,500 0.96% Put option
D. E. Shaw & Co., Inc. $15,227,736 366,845 0.94% Shares
BNP PARIBAS FINANCIAL MARKETS $15,210,800 366,437 0.94% Shares
ALGERT GLOBAL LLC $14,687,566 353,832 0.91% Shares
VANGUARD FIDUCIARY TRUST CO $14,027,433 337,929 0.87% Shares
Qube Research & Technologies Ltd $10,401,285 250,573 0.65% Shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP $9,764,605 235,235 0.61% Shares
CITADEL ADVISORS LLC $9,663,528 232,800 0.60% Put option
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $9,584,784 230,903 0.59% Shares
ESSEX INVESTMENT MANAGEMENT CO LLC $9,212,439 221,933 0.57% Shares
WOLVERINE TRADING, LLC $8,505,432 139,800 0.53% Call option
SUSQUEHANNA INTERNATIONAL GROUP, LLP $8,505,399 204,900 0.53% Call option
AQR CAPITAL MANAGEMENT LLC $8,072,740 194,477 0.50% Shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP $7,828,786 188,600 0.49% Put option
Invesco Ltd. $7,499,197 180,660 0.47% Shares
CITADEL ADVISORS LLC $7,318,213 176,300 0.45% Call option
Russell Investments Group, Ltd. $7,129,984 171,764 0.44% Shares
JANE STREET GROUP, LLC $7,069,942 170,319 0.44% Shares
MACKENZIE FINANCIAL CORP $6,826,319 164,450 0.42% Shares
ArrowMark Colorado Holdings LLC $6,618,022 159,432 0.41% Shares
Baird Financial Group, Inc. $6,525,497 157,203 0.40% Shares
Palisades Investment Partners, LLC $6,505,611 156,720 0.40% Shares
WOLVERINE TRADING, LLC $6,150,924 101,100 0.38% Put option
JPMORGAN CHASE & CO $6,040,140 149,502 0.37% Shares
Bank of New York Mellon Corp $5,976,092 143,968 0.37% Shares
Allspring Global Investments Holdings, LLC $5,214,430 130,622 0.32% Shares
RAYMOND JAMES FINANCIAL INC $4,931,429 118,801 0.31% Shares
AMERIPRISE FINANCIAL INC $4,643,143 111,856 0.29% Shares
GMT Capital Corp $4,485,820 108,066 0.28% Shares
BANK OF AMERICA CORP /DE/ $4,409,026 106,216 0.27% Shares
MILLENNIUM MANAGEMENT LLC $4,182,631 100,762 0.26% Shares
SILVERCREST ASSET MANAGEMENT GROUP LLC $4,152,079 100,026 0.26% Shares
Holocene Advisors, LP $3,973,171 95,716 0.25% Shares
Defiance ETFs, LLC $3,967,848 99,395 0.25% Shares
TWO SIGMA INVESTMENTS, LP $3,750,013 90,340 0.23% Shares
Swiss National Bank $3,677,786 88,600 0.23% Shares
ALPS ADVISORS INC $3,585,924 86,387 0.22% Shares
WELLINGTON MANAGEMENT GROUP LLP $3,538,478 85,244 0.22% Shares
SEI INVESTMENTS CO $3,537,223 85,215 0.22% Shares
WELLS FARGO & COMPANY/MN $3,458,032 83,306 0.21% Shares
RICE HALL JAMES & ASSOCIATES, LLC $3,263,516 78,620 0.20% Shares
Lumbard & Kellner, LLC $3,077,510 74,139 0.19% Shares
NEW YORK STATE COMMON RETIREMENT FUND $3,026,079 72,900 0.19% Shares
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $2,991,868 88,386 0.19% Shares
Cubist Systematic Strategies, LLC $2,940,259 49,508 0.18% Shares
Balyasny Asset Management L.P. $2,857,839 68,847 0.18% Shares
BROWN CAPITAL MANAGEMENT LLC $2,829,156 68,156 0.18% Shares
CAMPBELL NEWMAN ASSET MANAGEMENT INC $2,795,159 67,337 0.17% Shares
RHUMBLINE ADVISERS $2,638,864 63,572 0.16% Shares
Amundi $2,625,549 63,251 0.16% Shares
LPL Financial LLC $2,382,051 57,385 0.15% Shares
MARSHALL WACE, LLP $2,210,865 53,261 0.14% Shares
DEUTSCHE BANK AG\ $2,158,187 51,992 0.13% Shares
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM $2,112,361 50,888 0.13% Shares
WOLVERINE TRADING, LLC $2,025,181 33,287 0.13% Shares
ALLIANCEBERNSTEIN L.P. $1,852,272 54,720 0.11% Shares
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. $1,773,639 42,728 0.11% Shares
Legato Capital Management LLC $1,717,227 41,369 0.11% Shares
Cubist Systematic Strategies, LLC $1,597,591 26,900 0.10% Call option
NISSAY ASSET MANAGEMENT CORP /JAPAN $1,573,810 37,914 0.10% Shares
Quadrature Capital Ltd $1,564,180 37,682 0.10% Shares
ROYAL BANK OF CANADA $1,480,000 35,656 0.09% Shares
Merit Financial Group, LLC $1,472,402 35,471 0.09% Shares
Polymer Capital Management (US) LLC $1,432,967 34,521 0.09% Shares
Quantum Private Wealth, LLC $1,403,993 33,823 0.09% Shares
Focus Partners Wealth $1,397,682 33,671 0.09% Shares
FRANKLIN RESOURCES INC $1,384,774 33,360 0.09% Shares
TRUIST FINANCIAL CORP $1,357,377 32,700 0.08% Shares
TWO SIGMA ADVISERS, LP $1,355,538 47,100 0.08% Shares
CITIGROUP INC $1,353,143 32,598 0.08% Shares
VANGUARD ASSET MANAGEMENT, Ltd $1,352,769 32,589 0.08% Shares
Mitsubishi UFJ Asset Management Co., Ltd. $1,334,339 32,145 0.08% Shares
Aquatic Capital Management LLC $1,331,682 32,081 0.08% Shares
KORNITZER CAPITAL MANAGEMENT INC /KS $1,314,580 31,669 0.08% Shares
XTX Topco Ltd $1,280,500 30,848 0.08% Shares
OPPENHEIMER & CO INC $1,247,791 30,060 0.08% Shares
Portolan Capital Management, LLC $1,216,824 29,314 0.08% Shares
VIRTUS ADVISERS, LLC $1,183,076 28,501 0.07% Shares
HighTower Advisors, LLC $1,182,970 28,498 0.07% Shares
MetLife Investment Management, LLC $1,142,604 27,526 0.07% Shares
Round Rock Advisors LLC $1,097,151 26,431 0.07% Shares
JOURNEY STRATEGIC WEALTH LLC $1,053,310 31,117 0.07% Shares
Caption Management, LLC $1,016,995 24,500 0.06% Call option
Zurcher Kantonalbank (Zurich Cantonalbank) $1,010,478 24,343 0.06% Shares
DIVERSIFIED TRUST CO $991,175 23,878 0.06% Shares
State of New Jersey Common Pension Fund D $899,356 21,666 0.06% Shares
Dorsey & Whitney Trust CO LLC $897,073 21,611 0.06% Shares
CITADEL ADVISORS LLC $852,117 20,528 0.05% Shares
MANUFACTURERS LIFE INSURANCE COMPANY, THE $847,883 20,426 0.05% Shares
ARDSLEY ADVISORY PARTNERS LP $830,200 20,000 0.05% Shares
Universal- Beteiligungs- und Servicegesellschaft mbH $806,414 19,427 0.05% Shares
Mariner, LLC $778,484 18,751 0.05% Shares
Vanguard Global Advisers, LLC $766,067 18,455 0.05% Shares
INTECH INVESTMENT MANAGEMENT LLC $750,459 18,079 0.05% Shares
Quantinno Capital Management LP $708,451 17,067 0.04% Shares
TFC Financial Management, Inc. $696,829 16,787 0.04% Shares
Toroso Investments, LLC $696,044 24,185 0.04% Shares
Truvestments Capital LLC $687,696 16,567 0.04% Shares
SIMPLEX TRADING, LLC $686,284 16,533 0.04% Shares
Traynor Capital Management, Inc. $684,464 16,489 0.04% Shares
JANUS HENDERSON GROUP PLC $681,133 20,134 0.04% Shares
Central Pacific Bank - Trust Division $675,202 16,266 0.04% Shares
Verity Asset Management, Inc. $674,371 16,246 0.04% Shares
SCHNIEDERS CAPITAL MANAGEMENT, LLC. $666,402 16,054 0.04% Shares
Skyview Financial Group LLC $663,034 23,038 0.04% Shares
VOYA INVESTMENT MANAGEMENT LLC $660,092 15,902 0.04% Shares
Advisory Services Network, LLC $655,586 15,793 0.04% Shares
Andrew Hill Investment Advisors, Inc. $643,268 15,496 0.04% Shares
COMMONWEALTH EQUITY SERVICES, LLC $624,480 15,044 0.04% Shares
GLOBEFLEX CAPITAL L P $602,310 14,510 0.04% Shares
Inspire Advisors, LLC $599,377 14,450 0.04% Shares
Police & Firemen's Retirement System of New Jersey $576,989 13,900 0.04% Shares
GROUP ONE TRADING LLC $565,449 13,622 0.04% Shares
ACAS, LLC $551,718 10,200 0.03% Shares
CIM, LLC $538,883 12,982 0.03% Shares
ROI Financial Advisors, LLC $533,071 12,842 0.03% Shares
OSAIC HOLDINGS, INC. $525,136 12,651 0.03% Shares
Creative Planning $505,136 12,169 0.03% Shares
ARIZONA STATE RETIREMENT SYSTEM $504,430 12,152 0.03% Shares
IMC-Chicago, LLC $498,950 12,020 0.03% Shares
nVerses Capital, LLC $494,342 11,909 0.03% Shares
Vanguard Investments Australia, Ltd. $490,731 11,822 0.03% Shares
Summit Financial, LLC $482,408 11,622 0.03% Shares
DARK FOREST CAPITAL MANAGEMENT LP $474,127 11,422 0.03% Shares
FOX RUN MANAGEMENT, L.L.C. $473,505 11,407 0.03% Shares
Walleye Trading LLC $473,214 11,400 0.03% Call option
F/m Investments LLC $473,214 11,400 0.03% Shares
Cubist Systematic Strategies, LLC $457,303 7,700 0.03% Put option
Retirement Planning Group, LLC $456,610 11,000 0.03% Shares
PFG Investments, LLC $446,440 10,755 0.03% Shares
CREDIT AGRICOLE S A $446,025 10,745 0.03% Shares
Atom Investors LP $443,991 10,696 0.03% Shares
STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM $437,474 10,539 0.03% Shares
FMR LLC $429,788 10,354 0.03% Shares
Capital Market Strategies LLC $428,833 11,688 0.03% Shares
Cetera Investment Advisers $425,021 10,239 0.03% Shares
KLP KAPITALFORVALTNING AS $419,251 10,100 0.03% Shares
AVIVA PLC $417,840 10,066 0.03% Shares
STIFEL FINANCIAL CORP $414,600 9,988 0.03% Shares
TD Asset Management Inc $414,187 9,978 0.03% Shares
Vident Advisory, LLC $402,564 9,698 0.02% Shares
ProShare Advisors LLC $401,818 9,680 0.02% Shares
Catalyst Funds Management Pty Ltd $373,590 9,000 0.02% Shares
PRINCIPAL SECURITIES, INC. $372,552 8,975 0.02% Shares
MORGAN DEMPSEY CAPITAL MANAGEMENT LLC $366,092 8,819 0.02% Shares
Walleye Trading LLC $347,563 8,373 0.02% Shares
ExodusPoint Capital Management, LP $345,571 8,325 0.02% Shares
JONES FINANCIAL COMPANIES LLLP $343,148 8,637 0.02% Shares
PRUDENTIAL FINANCIAL INC $326,269 7,860 0.02% Shares
Fund Advisors of America Inc/FL $324,152 7,809 0.02% Shares
Kings Path Partners LLC $316,514 7,625 0.02% Shares
Cornerstone Investment Partners, LLC $313,816 7,560 0.02% Shares
BARCLAYS PLC $310,121 7,471 0.02% Shares
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC $309,633 8,610 0.02% Shares
AXQ CAPITAL, LP $309,208 7,449 0.02% Shares
BOOTHBAY FUND MANAGEMENT, LLC $307,755 7,414 0.02% Shares
CWM, LLC $298,659 8,823 0.02% Shares
Dynamic Technology Lab Private Ltd $298,000 7,163 0.02% Shares
Walleye Trading LLC $294,721 7,100 0.02% Put option
Point72 Asset Management, L.P. $294,721 7,100 0.02% Call option
Kingsview Wealth Management, LLC $290,362 6,995 0.02% Shares
HAP Trading, LLC $288,713 10,300 0.02% Call option
Marex Group Ltd $286,419 6,900 0.02% Shares
GREAT VALLEY ADVISOR GROUP, INC. $277,758 6,691 0.02% Shares
Wellington Shields Capital Management, LLC $272,513 6,565 0.02% Shares
TWO SIGMA SECURITIES, LLC $271,932 6,551 0.02% Shares
Pictet Asset Management Holding SA $267,117 6,435 0.02% Shares
Yorktown Management & Research Co Inc $265,664 6,400 0.02% Shares
TWO SIGMA INVESTMENTS, LP $265,664 6,400 0.02% Call option
D.A. DAVIDSON & CO. $263,464 6,347 0.02% Shares
Orion Porfolio Solutions, LLC $262,260 6,318 0.02% Shares
EntryPoint Capital, LLC $262,011 6,312 0.02% Shares
Assenagon Asset Management S.A. $258,358 6,224 0.02% Shares
Savant Capital, LLC $250,887 6,044 0.02% Shares
STATE OF WISCONSIN INVESTMENT BOARD $245,241 5,908 0.02% Shares
Mayflower Financial Advisors, LLC $237,852 5,730 0.01% Shares
ACORN FINANCIAL ADVISORY SERVICES INC /ADV $233,411 5,623 0.01% Shares
Y-Intercept (Hong Kong) Ltd $231,418 5,575 0.01% Shares
MERCER GLOBAL ADVISORS INC /ADV $230,381 5,550 0.01% Shares
STEPHENS INC /AR/ $226,230 5,450 0.01% Shares
Granite Investment Partners, LLC $224,984 5,420 0.01% Shares
Corient Private Wealth LP $222,993 5,372 0.01% Shares
VICTORY CAPITAL MANAGEMENT INC $220,543 5,313 0.01% Shares
PROMETHIUM ADVISORS,LLC $207,550 5,000 0.01% Shares
SEB Asset Management AB $206,970 4,986 0.01% Shares
AlphaQuest LLC $206,497 7,175 0.01% Shares
Ameritas Investment Partners, Inc. $177,538 4,277 0.01% Shares
Arax Advisory Partners $167,909 4,045 0.01% Shares
STRS OHIO $153,587 3,700 0.01% Shares
State of Wyoming $152,549 3,675 0.01% Shares
Ensign Peak Advisors, Inc $126,606 3,050 0.01% Shares
SBI Securities Co., Ltd. $125,526 3,024 0.01% Shares
Optiver Holding B.V. $114,277 2,753 0.01% Shares
Federation des caisses Desjardins du Quebec $103,567 2,495 0.01% Shares
Tower Research Capital LLC (TRC) $97,050 2,338 0.01% Shares
Lodestone Wealth Management LLC $95,348 2,297 0.01% Shares
Freestone Grove Partners LP $92,484 2,228 0.01% Shares
Global Retirement Partners, LLC $79,658 1,919 0.00% Shares
GPS Wealth Strategies Group, LLC $65,475 2,275 0.00% Shares
Rockefeller Capital Management L.P. $64,590 1,556 0.00% Shares
GAMMA Investing LLC $48,857 1,177 0.00% Shares
Point72 (DIFC) Ltd $46,977 791 0.00% Shares
Allworth Financial LP $42,538 1,025 0.00% Shares
Dakota Community Bank & Trust NA $41,261 994 0.00% Shares
Hughes Financial Services, LLC $37,359 900 0.00% Shares
Point72 Asset Management, L.P. $37,359 900 0.00% Put option
Steward Partners Investment Advisory, LLC $33,623 810 0.00% Shares
SUMMIT SECURITIES GROUP LLC $32,959 794 0.00% Shares
BNP PARIBAS ASSET MANAGEMENT Holding S.A. $31,257 753 0.00% Shares
BLUE BELL PRIVATE WEALTH MANAGEMENT, LLC $25,446 613 0.00% Shares
NewEdge Advisors, LLC $25,404 612 0.00% Shares
NISA INVESTMENT ADVISORS, LLC $22,955 553 0.00% Shares
Versant Capital Management, Inc $22,764 782 0.00% Shares
SIGNATUREFD, LLC $20,257 488 0.00% Shares
SWAN Capital LLC $16,925 500 0.00% Shares
Wealth Enhancement Trust Services, Inc. $16,853 406 0.00% Shares
Clearstead Trust, LLC $16,314 393 0.00% Shares
Essential Partners LLC $16,064 387 0.00% Shares
PNC Financial Services Group, Inc. $16,024 386 0.00% Shares
PRICE T ROWE ASSOCIATES INC /MD/ $14,274 343,867 0.00% Shares
Caitong International Asset Management Co., Ltd $13,781 332 0.00% Shares
Kemnay Advisory Services Inc. $13,657 329 0.00% Shares
T. Rowe Price Investment Management, Inc. $12,710 306,182 0.00% Shares
HARBOUR INVESTMENTS, INC. $12,495 301 0.00% Shares
HRT FINANCIAL LP $12,387 298,420 0.00% Shares
Lavaca Capital LLC $11,623 280 0.00% Shares
SHP Wealth Management $11,249 271 0.00% Shares
RAYMOND JAMES FINANCIAL INC $10,000 200 0.00% Put option
CoreCap Advisors, LLC $9,132 220 0.00% Shares
STANCE CAPITAL LLC $9,132 220 0.00% Shares
EverSource Wealth Advisors, LLC $7,970 192 0.00% Shares
LOS ANGELES CAPITAL MANAGEMENT LLC $7,513 181 0.00% Shares
Owl Creek Wealth Partners LLC $7,265 175 0.00% Shares
Sunbelt Securities, Inc. $6,939 205 0.00% Shares
Sterling Capital Management LLC $6,849 165 0.00% Shares
NATIONAL BANK OF CANADA /FI/ $6,766 163 0.00% Shares
Spire Wealth Management $6,517 157 0.00% Shares
BARRETT & COMPANY, INC. $6,227 150 0.00% Shares
Quantbot Technologies LP $5,770 139 0.00% Shares
Fortitude Family Office, LLC $5,645 136 0.00% Shares
Parallel Advisors, LLC $5,604 135 0.00% Shares
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO $4,940 119 0.00% Shares
Smartleaf Asset Management LLC $4,859 122 0.00% Shares
IFP Advisors, Inc $4,483 108 0.00% Shares
TD Waterhouse Canada Inc. $4,397 110 0.00% Shares
ROTHSCHILD INVESTMENT LLC $4,317 104 0.00% Shares
PRIVATE TRUST CO NA $4,151 100 0.00% Shares
TRUST CO OF VERMONT $4,151 100 0.00% Shares
Archer Investment Corp $4,151 100 0.00% Shares
IMA Advisory Services, Inc. $4,151 100 0.00% Shares
OAKWORTH CAPITAL, INC. $3,992 100 0.00% Shares
Quarry LP $3,943 95 0.00% Shares
Farther Finance Advisors, LLC $3,639 88 0.00% Shares
Wellington Shields & Co., LLC $2,781 67 0.00% Shares
JNBA Financial Advisors $2,740 66 0.00% Shares
Kilter Group LLC $2,616 63 0.00% Shares
US BANCORP \DE\ $2,532 61 0.00% Shares
Cambridge Investment Research Advisors, Inc. $2,514 60,564 0.00% Shares
HAGER INVESTMENT MANAGEMENT SERVICES, LLC $2,076 50 0.00% Shares
Aventura Private Wealth, LLC $2,076 50 0.00% Shares
Covestor Ltd $1,716 41,348 0.00% Shares
CIBC Private Wealth Group LLC $1,485 25 0.00% Shares
WHITTIER TRUST CO OF NEVADA INC $1,422 40 0.00% Shares
True Wealth Design, LLC $1,038 25 0.00% Shares
KBC Group NV $999 24,078 0.00% Shares
Larson Financial Group LLC $913 22 0.00% Shares
MassMutual Private Wealth & Trust, FSB $872 21 0.00% Shares
Keating Financial Advisory Services, Inc. $789 19 0.00% Shares
Virtu Financial LLC $650 15,658 0.00% Shares
Lindbrook Capital, LLC $635 35 0.00% Shares
Stone House Investment Management, LLC $581 14 0.00% Shares
Rialto Wealth Management, LLC $540 13 0.00% Shares
State of Alaska, Department of Revenue $421 10,146 0.00% Shares
JFS WEALTH ADVISORS, LLC $339 10 0.00% Shares
Handelsbanken Fonder AB $291 8,600 0.00% Shares
SJS Investment Consulting Inc. $125 3 0.00% Shares
JPL Wealth Management, LLC $84 2 0.00% Shares
WPG Advisers, LLC $42 1 0.00% Shares
RHL GROUP, LLC $42 1 0.00% Shares
HANTZ FINANCIAL SERVICES, INC. $5 130 0.00% Shares