MRTN — Institutional owners (13F)

246 filers · $1.1B 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. $174,522,436 10,058,930 15.83% Shares
DIMENSIONAL FUND ADVISORS LP $86,737,142 4,999,156 7.87% Shares
AMERICAN CENTURY COMPANIES INC $48,594,973 2,800,863 4.41% Shares
STATE STREET CORP $47,254,495 2,723,602 4.29% Shares
FMR LLC $46,886,258 2,702,378 4.25% Shares
VANGUARD GROUP INC $45,676,509 4,013,753 4.14% Shares
VANGUARD CAPITAL MANAGEMENT LLC $43,806,304 2,524,859 3.97% Shares
GOLDMAN SACHS GROUP INC $36,466,135 2,101,794 3.31% Shares
Nuveen, LLC $33,749,951 1,945,243 3.06% Shares
TWO SIGMA INVESTMENTS, LP $31,760,303 1,830,565 2.88% Shares
GEODE CAPITAL MANAGEMENT, LLC $26,968,001 1,554,058 2.45% Shares
CRAMER ROSENTHAL MCGLYNN LLC $26,437,184 1,523,757 2.40% Shares
ROYCE & ASSOCIATES LP $24,201,342 1,394,890 2.19% Shares
MORGAN STANLEY $23,475,803 1,353,069 2.13% Shares
VANGUARD PORTFOLIO MANAGEMENT LLC $21,149,303 1,218,980 1.92% Shares
CHARLES SCHWAB INVESTMENT MANAGEMENT INC $20,786,168 1,198,050 1.89% Shares
AMERIPRISE FINANCIAL INC $18,765,866 1,081,606 1.70% Shares
Boston Partners $18,203,041 1,049,147 1.65% Shares
Russell Investments Group, Ltd. $16,004,399 922,443 1.45% Shares
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $15,957,489 919,740 1.45% Shares
LONDON CO OF VIRGINIA $14,816,386 853,969 1.34% Shares
12th Street Asset Management Company, LLC $13,162,300 758,634 1.19% Shares
DEPRINCE RACE & ZOLLO INC $12,879,981 742,362 1.17% Shares
CITADEL ADVISORS LLC $12,531,055 722,251 1.14% Shares
NEXT CENTURY GROWTH INVESTORS LLC $12,132,941 699,305 1.10% Shares
NORTHERN TRUST CORP $11,584,266 667,681 1.05% Shares
JPMORGAN CHASE & CO $10,606,623 604,366 0.96% Shares
NUANCE INVESTMENTS, LLC $9,488,211 546,871 0.86% Shares
BANK OF AMERICA CORP /DE/ $8,432,812 486,041 0.76% Shares
Creative Planning $7,276,056 419,369 0.66% Shares
AQR CAPITAL MANAGEMENT LLC $6,855,412 395,125 0.62% Shares
TWO SIGMA ADVISERS, LP $6,840,700 601,116 0.62% Shares
VANGUARD FIDUCIARY TRUST CO $6,673,469 384,638 0.61% Shares
NORGES BANK $6,575,650 379,000 0.60% Shares
TEACHER RETIREMENT SYSTEM OF TEXAS $6,298,519 363,027 0.57% Shares
HEARTLAND ADVISORS INC $6,072,500 350,000 0.55% Shares
Bank of New York Mellon Corp $5,719,745 329,668 0.52% Shares
Invesco Ltd. $5,607,503 323,199 0.51% Shares
NICHOLAS COMPANY, INC. $5,467,592 315,135 0.50% Shares
MACKENZIE FINANCIAL CORP $5,432,250 313,098 0.49% Shares
PRINCIPAL FINANCIAL GROUP INC $4,857,862 279,992 0.44% Shares
Stanley-Laman Group, Ltd. $4,692,225 270,445 0.43% Shares
Buckland Partners Management Co LLC $4,642,756 267,594 0.42% Shares
Polar Asset Management Partners Inc. $4,438,130 255,800 0.40% Shares
UBS Group AG $4,352,768 250,880 0.39% Shares
Allianz Asset Management GmbH $4,186,399 241,291 0.38% Shares
Aptus Capital Advisors, LLC $3,545,247 204,337 0.32% Shares
US BANCORP \DE\ $3,478,988 200,518 0.32% Shares
Cubist Systematic Strategies, LLC $3,452,787 323,901 0.31% Shares
Public Sector Pension Investment Board $3,445,866 198,609 0.31% Shares
RHUMBLINE ADVISERS $2,548,802 146,904 0.23% Shares
Legal & General Group Plc $2,305,224 132,866 0.21% Shares
Connor, Clark & Lunn Investment Management Ltd. $2,176,575 125,451 0.20% Shares
Verition Fund Management LLC $2,150,411 123,943 0.20% Shares
Campbell & CO Investment Adviser LLC $2,099,402 121,003 0.19% Shares
SEI INVESTMENTS CO $2,091,678 120,557 0.19% Shares
Swiss National Bank $1,986,141 114,475 0.18% Shares
CastleKnight Management LP $1,880,740 108,400 0.17% Shares
Mariner, LLC $1,863,746 107,420 0.17% Shares
Hudson Bay Capital Management LP $1,852,633 106,780 0.17% Shares
WINTON GROUP Ltd $1,603,661 92,430 0.15% Shares
Fulcrum Asset Management LLP $1,501,052 85,530 0.14% Shares
CITIGROUP INC $1,386,802 79,931 0.13% Shares
AlphaQuest LLC $1,383,080 121,536 0.13% Shares
JANE STREET GROUP, LLC $1,356,770 78,200 0.12% Call option
Atria Investments, Inc $1,336,040 77,005 0.12% Shares
Quantinno Capital Management LP $1,304,671 75,197 0.12% Shares
XTX Topco Ltd $1,280,933 73,829 0.12% Shares
BARCLAYS PLC $1,258,308 72,525 0.11% Shares
CITADEL ADVISORS LLC $1,223,175 70,500 0.11% Call option
DEUTSCHE BANK AG\ $1,091,194 62,893 0.10% Shares
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $1,087,742 82,844 0.10% Shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP $1,075,700 62,000 0.10% Call option
MARTINGALE ASSET MANAGEMENT L P $1,073,965 61,900 0.10% Shares
PRUDENTIAL FINANCIAL INC $1,052,677 60,673 0.10% Shares
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM $1,023,303 58,980 0.09% Shares
ENVESTNET ASSET MANAGEMENT INC $979,386 56,449 0.09% Shares
Ausbil Investment Management Ltd $966,638 72,299 0.09% Shares
Canvas Wealth Advisors, LLC $966,559 73,615 0.09% Shares
MILLENNIUM MANAGEMENT LLC $961,606 55,424 0.09% Shares
EntryPoint Capital, LLC $942,643 54,331 0.09% Shares
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND $931,973 53,716 0.08% Shares
WELLS FARGO & COMPANY/MN $886,393 51,089 0.08% Shares
Nebula Research & Development LLC $852,534 65,630 0.08% Shares
ALLIANCEBERNSTEIN L.P. $850,601 64,783 0.08% Shares
PDT Partners, LLC $816,543 47,063 0.07% Shares
Horizon Investments, LLC $805,960 46,453 0.07% Shares
VANGUARD ASSET MANAGEMENT, Ltd $771,450 44,464 0.07% Shares
MERCER GLOBAL ADVISORS INC /ADV $766,026 44,151 0.07% Shares
HSBC HOLDINGS PLC $760,711 43,719 0.07% Shares
FRANKLIN RESOURCES INC $753,667 43,439 0.07% Shares
CONFLUENCE INVESTMENT MANAGEMENT LLC $750,437 58,083 0.07% Shares
Vanguard Personalized Indexing Management, LLC $702,276 40,477 0.06% Shares
BNP PARIBAS FINANCIAL MARKETS $620,367 35,756 0.06% Shares
MetLife Investment Management, LLC $607,094 34,991 0.06% Shares
Skopos Labs, Inc. $594,923 45,311 0.05% Shares
Simplicity Wealth,LLC $566,599 32,657 0.05% Shares
Illinois Municipal Retirement Fund $522,808 30,133 0.05% Shares
CastleKnight Management LP $520,500 30,000 0.05% Call option
Inspire Investing, LLC $518,582 39,496 0.05% Shares
DARK FOREST CAPITAL MANAGEMENT LP $508,355 29,300 0.05% Shares
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. $474,054 27,323 0.04% Shares
Cetera Investment Advisers $473,528 27,292 0.04% Shares
CANADA PENSION PLAN INVESTMENT BOARD $468,450 27,000 0.04% Shares
STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM $463,956 26,741 0.04% Shares
Louisiana State Employees Retirement System $440,690 25,400 0.04% Shares
Graham Capital Management, L.P. $433,924 25,010 0.04% Shares
Amundi $430,766 24,828 0.04% Shares
ELEVATION POINT WEALTH PARTNERS, LLC $429,208 24,738 0.04% Shares
NEUBERGER BERMAN GROUP LLC $410,691 23,671 0.04% Shares
BLAIR WILLIAM & CO/IL $401,791 23,158 0.04% Shares
BARD ASSOCIATES INC $393,082 22,656 0.04% Shares
H D Vest Advisory Services $384,980 29,637 0.03% Shares
Cerity Partners LLC $383,540 22,107 0.03% Shares
Ashton Thomas Private Wealth, LLC $381,908 22,012 0.03% Shares
World Investment Advisors $376,287 21,688 0.03% Shares
NOMURA HOLDINGS INC $369,624 21,304 0.03% Shares
JANUS HENDERSON GROUP PLC $364,879 27,758 0.03% Shares
Universal- Beteiligungs- und Servicegesellschaft mbH $356,334 20,538 0.03% Shares
Engineers Gate Manager LP $352,552 20,320 0.03% Shares
RAYMOND JAMES FINANCIAL INC $349,273 20,131 0.03% Shares
Vanguard Global Advisers, LLC $341,639 19,691 0.03% Shares
EVERGREEN CAPITAL MANAGEMENT LLC $339,713 19,580 0.03% Shares
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC $333,482 19,445 0.03% Shares
Zurcher Kantonalbank (Zurich Cantonalbank) $329,251 18,977 0.03% Shares
NEW YORK STATE COMMON RETIREMENT FUND $319,049 18,389 0.03% Shares
STIFEL FINANCIAL CORP $292,782 16,875 0.03% Shares
FIFTH THIRD BANCORP $292,457 16,856 0.03% Shares
Centiva Capital, LP $291,654 16,810 0.03% Shares
MANUFACTURERS LIFE INSURANCE COMPANY, THE $286,206 16,496 0.03% Shares
Police & Firemen's Retirement System of New Jersey $280,636 16,175 0.03% Shares
LPL Financial LLC $278,507 16,052 0.03% Shares
ARIZONA STATE RETIREMENT SYSTEM $273,263 15,750 0.02% Shares
GREAT LAKES ADVISORS, LLC $271,025 15,621 0.02% Shares
STRS OHIO $261,985 15,100 0.02% Shares
Ethic Inc. $259,053 14,931 0.02% Shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP $254,577 14,673 0.02% Shares
YOUSIF CAPITAL MANAGEMENT, LLC $253,761 14,626 0.02% Shares
COMERICA BANK $245,748 21,594 0.02% Shares
OPPENHEIMER ASSET MANAGEMENT INC. $239,725 13,817 0.02% Shares
INTECH INVESTMENT MANAGEMENT LLC $239,257 13,790 0.02% Shares
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS $238,337 13,737 0.02% Shares
PNC Financial Services Group, Inc. $234,191 13,498 0.02% Shares
GAMMA Investing LLC $232,282 13,388 0.02% Shares
Vanguard Investments Australia, Ltd. $231,137 13,322 0.02% Shares
CAXTON ASSOCIATES LLP $230,876 13,307 0.02% Shares
State of Tennessee, Department of Treasury $228,413 13,165 0.02% Shares
OREGON PUBLIC EMPLOYEES RETIREMENT FUND $227,840 13,132 0.02% Shares
KLP KAPITALFORVALTNING AS $227,285 13,100 0.02% Shares
IEQ CAPITAL, LLC $224,112 12,917 0.02% Shares
FARMERS & MERCHANTS INVESTMENTS INC $208,877 12,039 0.02% Shares
Granite Investment Partners, LLC $206,743 11,916 0.02% Shares
NewEdge Wealth, LLC $205,407 11,839 0.02% Shares
Vestmark Advisory Solutions, Inc. $205,407 11,839 0.02% Shares
Procyon Advisors, LLC $203,334 11,720 0.02% Shares
Vise Technologies, Inc. $201,867 11,635 0.02% Shares
VOYA INVESTMENT MANAGEMENT LLC $199,022 11,471 0.02% Shares
TECTONIC ADVISORS LLC $194,803 11,228 0.02% Shares
Inscription Capital, LLC $189,740 10,936 0.02% Shares
Trexquant Investment LP $184,986 10,662 0.02% Shares
FIRST TRUST ADVISORS LP $173,641 10,008 0.02% Shares
Caption Management, LLC $160,522 9,252 0.01% Shares
CWM, LLC $146,820 11,182 0.01% Shares
ROYAL BANK OF CANADA $117,000 6,734 0.01% Shares
SIGNATUREFD, LLC $108,628 6,261 0.01% Shares
NISA INVESTMENT ADVISORS, LLC $102,799 5,925 0.01% Shares
Ameritas Investment Partners, Inc. $93,430 5,385 0.01% Shares
Farther Finance Advisors, LLC $71,000 4,077 0.01% Shares
Point72 Asia (Singapore) Pte. Ltd. $70,176 6,583 0.01% Shares
Atlantic Union Bankshares Corp $69,851 4,026 0.01% Shares
Tower Research Capital LLC (TRC) $51,183 2,950 0.00% Shares
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO $50,922 2,935 0.00% Shares
Arax Advisory Partners $48,442 2,792 0.00% Shares
New Age Alpha Advisors, LLC $45,839 2,642 0.00% Shares
CIBC Private Wealth Group LLC $40,476 3,797 0.00% Shares
Salomon & Ludwin, LLC $38,896 2,229 0.00% Shares
Global Retirement Partners, LLC $36,036 2,077 0.00% Shares
EverSource Wealth Advisors, LLC $22,416 1,292 0.00% Shares
Godfrey Financial Associates, Inc. $21,913 1,263 0.00% Shares
MassMutual Private Wealth & Trust, FSB $21,774 1,255 0.00% Shares
Sterling Capital Management LLC $20,751 1,196 0.00% Shares
Allworth Financial LP $19,502 1,124 0.00% Shares
Pinnacle Wealth Planning Services, Inc. $19,050 1,098 0.00% Shares
Rockefeller Capital Management L.P. $17,411 1,003 0.00% Shares
MCF Advisors LLC $16,587 956 0.00% Shares
Parallel Advisors, LLC $16,587 956 0.00% Shares
BESSEMER GROUP INC $15,153 873,519 0.00% Shares
JONES FINANCIAL COMPANIES LLLP $13,889 795 0.00% Shares
BNP PARIBAS ASSET MANAGEMENT Holding S.A. $13,602 784 0.00% Shares
Essential Partners LLC $13,394 772 0.00% Shares
BARROW HANLEY MEWHINNEY & STRAUSS LLC $13,307 767 0.00% Shares
HUNTINGTON NATIONAL BANK $12,891 743 0.00% Shares
Anchor Investment Management, LLC $12,700 732 0.00% Shares
MEEDER ASSET MANAGEMENT INC $10,011 577 0.00% Shares
SJS Investment Consulting Inc. $8,554 493 0.00% Shares
High Note Wealth, LLC $7,617 439 0.00% Shares
City State Bank $6,073 350 0.00% Shares
OSAIC HOLDINGS, INC. $5,933 342 0.00% Shares
Optiver Holding B.V. $5,726 330 0.00% Shares
Versant Capital Management, Inc $4,935 382 0.00% Shares
UMB Bank, n.a. $4,494 259 0.00% Shares
OAKWORTH CAPITAL, INC. $4,338 250 0.00% Shares
Private Wealth Management Group, LLC $4,217 243 0.00% Shares
Red Tortoise LLC $3,873 295 0.00% Shares
ROTHSCHILD INVESTMENT LLC $3,869 223 0.00% Shares
Kilter Group LLC $3,297 190 0.00% Shares
Lindbrook Capital, LLC $2,936 214 0.00% Shares
Point72 Europe (London) LLP $2,641 248 0.00% Shares
Quarry LP $2,568 148 0.00% Shares
True Wealth Design, LLC $2,551 147 0.00% Shares
Steward Partners Investment Advisory, LLC $2,429 140 0.00% Shares
Fortitude Family Office, LLC $2,082 120 0.00% Shares
POM Investment Strategies, LLC $1,961 113 0.00% Shares
Valued Wealth Advisors LLC $1,770 102 0.00% Shares
Physician Wealth Advisors, Inc. $1,770 102 0.00% Shares
Rialto Wealth Management, LLC $1,718 99 0.00% Shares
Clearstead Advisors, LLC $1,250 72 0.00% Shares
Treasurer of the State of North Carolina $1,228 70,791 0.00% Shares
Transamerica Financial Advisors, LLC $1,179 68 0.00% Shares
PRICE T ROWE ASSOCIATES INC /MD/ $1,162 66,942 0.00% Shares
Cornerstone Planning Group LLC $970 56 0.00% Shares
SG Americas Securities, LLC $889 51,234 0.00% Shares
Bare Financial Services, Inc $885 51 0.00% Shares
WPG Advisers, LLC $833 48 0.00% Shares
ZIONS BANCORPORATION, NATIONAL ASSOCIATION /UT/ $798 46 0.00% Shares
CANADA LIFE ASSURANCE Co $790 45,504 0.00% Shares
Keating Financial Advisory Services, Inc. $781 45 0.00% Shares
GSA CAPITAL PARTNERS LLP $760 43,805 0.00% Shares
IFP Advisors, Inc $746 43 0.00% Shares
Thrivent Financial for Lutherans $660 38,039 0.00% Shares
Caitong International Asset Management Co., Ltd $573 33 0.00% Shares
GILPIN WEALTH MANAGEMENT, LLC $452 26 0.00% Shares
State of Alaska, Department of Revenue $412 23,843 0.00% Shares
Ankerstar Wealth, LLC $364 21 0.00% Shares
Parkside Financial Bank & Trust $347 20 0.00% Shares
Plante Moran Financial Advisors, LLC $295 17 0.00% Shares
AMALGAMATED BANK $271 15,599 0.00% Shares
TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY $253 14,559 0.00% Shares
SBI Securities Co., Ltd. $208 12 0.00% Shares
ACADIAN ASSET MANAGEMENT LLC $127 7,415 0.00% Shares
HANTZ FINANCIAL SERVICES, INC. $82 4,714 0.00% Shares
Davis Capital Management $52 3 0.00% Shares
NEW YORK STATE TEACHERS RETIREMENT SYSTEM $36 2,063 0.00% Shares
Avion Wealth $2 148 0.00% Shares
Pacer Advisors, Inc. $2 87 0.00% Shares
Covestor Ltd $1 41 0.00% Shares