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$187.10 -3.81 (-2.00%)
S&P 400 member Russell 1000 member Rebalance outlook locked
Market Cap
$15.33B
Shares
80.30M
Volume · Oct 20 779.24K Avg daily vol (3M) 1.5M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP → See every holder of MTZ: 13F, 13D and 13G, insiders and funds →
Institutional holdings are being reconciled with SEC filings. Holder totals and changes may be incomplete until reconciliation finishes.
The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 899
Total Value: $25,352,581,876
Total Shares: 61,381,619
Showing 1–100 of 924 holdings by value · page 1 of 10

Institutional Ownership Trend

27 quarters

Superinvestors Holding MTZ

All superinvestors →
Stephen Mandel $559,666,021 Philippe Laffont $215,207,033 Daniel Loeb $120,657,400 Joel Greenblatt $63,069,287 George Soros $3,442,896 Ray Dalio $2,899,522

Holder Concentration

Across 919 13F filers
Top Holder
12.5%
Sep 2023 → Jun 2026 · range 9.3% – 14.4%
of institutional value
Top 5
31.3%
Sep 2023 → Jun 2026 · range 31.1% – 35.2%
of institutional value
Top 10
43.5%
Sep 2023 → Jun 2026 · range 43.5% – 48.9%
of institutional value
HHI
320
Sep 2023 → Jun 2026 · range 320 – 415
Broadly held

Who Holds MTZ

Last 8 quarters through Sep 30, 2026 (filing window open)

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026, the newest closed quarter: 912 filers, like-for-like change +2.4%; actively managed books -1.1%; index-like books +10.1%.

Holder type Share Filers Change
Registered adviser 49.3% 522 -6.7%
Exempt adviser 0.9% 9 -31.9%
Adviser 5.1% 17 +43.7%
Bank 12.4% 33 +32.2%
Insurer 0.3% 4 +27.5%
Broker-dealer 0.2% 2 +15.2%
Benefit plan 0.4% 9 -17.2%
Non-US 3.4% 15 0.0%
Holding company 17.2% 13 +10.1%
Unknown 10.8% 288 +1.0%

The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Excluded 12 holders with no observed 2026-03-31 13F and 8 holders with no observed 2026-06-30 13F. Compared across CIK changes: 4 filers continue as Evelyn Partners Group Ltd; JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.

Conviction and Crowding

912 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders
22
2.41% of filers hold it in their top 10
Mar 31, 2026: 30
Holders above 5%
10
median weight 0.030%
Mar 31, 2026: 16
Crowding
26.5%
of shares outstanding, 74th percentile
Mar 31, 2026: 29.8%
Private-fund advisers
25.7%
of shares outstanding
Institutional ownership
75.2%
96.2% of the estimated free float
Top 10 holders
44.9%
of 13F shares, Herfindahl 0.034
Active holders
-1.1%
like-for-like share change of active filers
5% stakes on record
5
2 13D, 3 13G (3 institutional, 0 passive, 0 exempt)
How long holders have held it value-weighted 14.0 quarters
Under 1 year 20.3% 1 to 3 years 32.8% 3 years or more 46.9% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $2,026,128 (1 buying, 3 selling).

Estimated Holder Cost Basis

Quarter ended Jun 30, 2026, on that quarter's share basis

Estimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.

Estimated avg cost
$215.39
estimated per share
Mar 31, 2026: $183.21
Quarter-end price
$416.06
implied by 13F values
Estimated gain or loss
+93.2%
price against the estimated cost
Estimated at a loss
0.000%
of costed 13F value

Estimated cost covers 36.4% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.

Shared Holders

Companies MTZ's active holders also own, quarter ended Jun 30, 2026
# Company Shared holders
1 CRS Carpenter Technology Corp 45
2 NVT nVent Electric plc 38
3 PWR Quanta Services, Inc. 73
4 DY Dycom Industries Inc 24
5 FIX Comfort Systems USA Inc 50
6 COHR Coherent Corp. 46
7 ATI Ati Inc 26
8 GEV GE Vernova Inc. 114
9 VRT Vertiv Holdings Co 71
10 GOOGL Alphabet Inc. 166

Shareholder Targets

13F filers that own its peers but not MTZ, quarter ended Jun 30, 2026

Found through its holder-overlap peers: CRS, NVT, PWR, DY, FIX, COHR, ATI, GEV, VRT, GOOGL, MU, AMZN, NVDA, AVGO, MKSI, EME, PRIM, LLY, MSFT, AAPL. 6,375 filers in all.

# Filer In peers
1 Capital Research Global Investors Adviser, Diversified active $234,595,600,366 11 held
2 Capital World Investors Adviser, Diversified active $222,411,845,660 14 held
3 Capital International Investors Adviser, Diversified active $139,688,182,673 15 held
4 WELLINGTON MANAGEMENT GROUP LLP Holding company, Diversified active $136,805,342,128 19 held
5 LILLY ENDOWMENT INC Unknown, Unknown $108,400,867,760 1 held
6 Berkshire Hathaway Inc Insurer, Concentrated $103,714,385,303 2 held
7 Fisher Asset Management, LLC Adviser, Diversified active $84,446,446,764 16 held
8 MASSACHUSETTS FINANCIAL SERVICES CO /MA/ Registered adviser, Diversified active $57,948,411,857 19 held
9 PRIMECAP MANAGEMENT CO/CA/ Registered adviser, Diversified active $50,219,909,294 9 held
10 National Pension Service Unknown, Index-like $48,775,089,213 14 held

Fund Ownership of MTZ by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 18.28% of shares outstanding.

Fund type Of shares outstanding Shares
Index funds 2.62% 2,100,777
Index ETFs 15.66% 12,577,978
Active ETFs 0.83% 667,955
Active funds 8.26% 6,634,811
Unclassified 0.71% 570,131
All registered funds 28.08% 22,551,652
How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Holder type: Registered adviser 510 Exempt adviser 10 Adviser 17 Bank 33 Insurer 4 Broker-dealer 2 Benefit plan 9 Non-US 15 Holding company 13 Unknown 286
Showing 100 of 924
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
BlackRock, Inc. $3,178,068,892 12.54% 7,638,487
PECONIC PARTNERS LLC $1,530,448,001 6.04% 3,678,431
VANGUARD CAPITAL MANAGEMENT LLC $1,178,219,094 4.65% 2,831,849
VANGUARD PORTFOLIO MANAGEMENT LLC $1,170,015,223 4.61% 2,812,131
STATE STREET CORP $933,959,422 3.68% 2,244,771
Hill City Capital, LP $896,609,300 3.54% 2,155,000
LONE PINE CAPITAL LLC $559,666,021 2.21% 1,345,157
BANK OF AMERICA CORP /DE/ $555,824,537 2.19% 1,335,924
FIRST TRUST ADVISORS LP $552,693,687 2.18% 1,328,399
JPMORGAN CHASE & CO $548,434,060 2.16% 1,318,161
GEODE CAPITAL MANAGEMENT, LLC $531,782,511 2.10% 1,278,139
Invesco Ltd. $516,490,220 2.04% 1,241,384
VICTORY CAPITAL MANAGEMENT INC $503,465,468 1.99% 1,210,079
Hood River Capital Management LLC $488,420,323 1.93% 1,173,918
FMR LLC $370,336,252 1.46% 890,103
AMERIPRISE FINANCIAL INC $305,794,110 1.21% 734,976
Bank of New York Mellon Corp $280,544,258 1.11% 674,288
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. $274,782,664 1.08% 660,440
AQR CAPITAL MANAGEMENT LLC $273,602,300 1.08% 657,603
MORGAN STANLEY $271,896,451 1.07% 653,503
DIMENSIONAL FUND ADVISORS LP $264,733,150 1.04% 636,286
Electron Capital Partners, LLC $258,036,251 1.02% 620,190
CANADA PENSION PLAN INVESTMENT BOARD $257,919,754 1.02% 619,910
T. Rowe Price Investment Management, Inc. $247,024,807 0.97% 593,724
CHARLES SCHWAB INVESTMENT MANAGEMENT INC $229,381,782 0.90% 551,319
GOLDMAN SACHS GROUP INC $225,769,132 0.89% 542,636
NORDEA INVESTMENT MANAGEMENT AB $220,288,374 0.87% 529,463
NORTHERN TRUST CORP $215,370,543 0.85% 517,643
COATUE MANAGEMENT LLC $215,207,033 0.85% 517,250
UBS Group AG $212,125,277 0.84% 509,843
BNP PARIBAS ARBITRAGE, SA $181,652,628 0.72% 436,602
Qube Research & Technologies Ltd $170,252,584 0.67% 409,202
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $167,967,160 0.66% 403,709
VANGUARD FIDUCIARY TRUST CO $166,088,655 0.66% 399,194
Amundi $166,050,377 0.65% 399,102
WESTFIELD CAPITAL MANAGEMENT CO LP $155,796,579 0.61% 374,457
CITADEL ADVISORS LLC $129,810,720 0.51% 312,000
SUSQUEHANNA INTERNATIONAL GROUP, LLP $128,853,782 0.51% 309,700
Anomaly Capital Management, LP $127,697,551 0.50% 306,921
Third Point LLC $120,657,400 0.48% 290,000
PRICE T ROWE ASSOCIATES INC /MD/ $117,510,321 0.46% 282,436
140 Summer Partners LP $111,573,978 0.44% 268,168
Forest Avenue Capital Management LP $103,443,749 0.41% 248,627
JANE STREET GROUP, LLC $102,850,032 0.41% 247,200
Freestone Grove Partners LP $102,597,483 0.40% 246,593
BESSEMER GROUP INC $95,889,758 0.38% 230,471
Clearbridge Investments, LLC $90,946,971 0.36% 218,591
FEDERATED HERMES, INC. $90,143,557 0.36% 216,660
BOWEN HANES & CO INC $89,646,367 0.35% 215,465
HENNESSY ADVISORS INC $85,333,906 0.34% 205,100
SUSQUEHANNA INTERNATIONAL GROUP, LLP $80,549,216 0.32% 193,600
Merewether Investment Management, LP $79,149,590 0.31% 190,236
Nuveen, LLC $78,658,221 0.31% 189,055
RHUMBLINE ADVISERS $78,499,288 0.31% 188,673
Legal & General Group Plc $75,670,495 0.30% 181,874
D. E. Shaw & Co., Inc. $74,991,902 0.30% 180,243
Swiss National Bank $71,678,816 0.28% 172,280
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $69,209,500 0.27% 166,345
RAYMOND JAMES FINANCIAL INC $68,806,336 0.27% 165,376
Point72 Asset Management, L.P. $65,033,922 0.26% 156,309
OP Asset Management Ltd $64,469,329 0.25% 154,952
Gotham Asset Management, LLC $63,069,287 0.25% 151,587
Yaupon Capital Management LP $62,409,000 0.25% 150,000
TORTOISE CAPITAL ADVISORS, L.L.C. $59,800,719 0.24% 143,731
COUNTRY TRUST BANK $58,872,490 0.23% 141,500
PRINCIPAL FINANCIAL GROUP INC $57,926,785 0.23% 139,227
Quantinno Capital Management LP $56,979,417 0.22% 136,950
LORD, ABBETT & CO. LLC $56,937,394 0.22% 136,849
Newbrook Capital Advisors LP $55,930,945 0.22% 134,430
KIRR MARBACH & CO LLC /IN/ $55,638,039 0.22% 133,726
ACADIAN ASSET MANAGEMENT LLC $54,922,832 0.22% 132,007
JANE STREET GROUP, LLC $54,711,890 0.22% 131,500
HILLMAN CO $54,465,998 0.21% 130,909
California Public Employees Retirement System $52,699,407 0.21% 126,663
TWO SIGMA INVESTMENTS, LP $52,036,208 0.21% 125,069
Sumitomo Mitsui Trust Group, Inc. $51,708,768 0.20% 124,282
WELLS FARGO & COMPANY/MN $49,684,218 0.20% 119,416
DEUTSCHE BANK AG\ $49,397,552 0.19% 118,727
SEI INVESTMENTS CO $48,528,821 0.19% 116,639
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND $46,640,326 0.18% 112,100
BARCLAYS PLC $44,965,267 0.18% 108,074
Goodlander Investment Management, LLC $43,686,300 0.17% 105,000
ENVESTNET ASSET MANAGEMENT INC $43,136,684 0.17% 103,679
SAMLYN CAPITAL, LLC $41,870,613 0.17% 100,636
JENNISON ASSOCIATES LLC $38,985,238 0.15% 93,701
CITADEL ADVISORS LLC $38,860,004 0.15% 93,400
LPL Financial LLC $38,807,580 0.15% 93,274
ROYAL BANK OF CANADA $38,144,377 0.15% 91,680
KBC Group NV $37,939,263 0.15% 91,187
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM $37,216,983 0.15% 89,451
MAPLELANE CAPITAL, LLC $36,946,127 0.15% 88,800
ThornTree Capital Partners LP $36,541,717 0.14% 87,828
HSBC HOLDINGS PLC $35,995,012 0.14% 86,514
LGT Group Foundation $35,494,077 0.14% 85,310
Zimmer Partners, LP $35,365,100 0.14% 85,000
CUSHING ASSET MANAGEMENT, LP dba NXG INVESTMENT MANAGEMENT $34,449,768 0.14% 82,800
ALLIANCEBERNSTEIN L.P. $33,574,793 0.13% 80,697
MAPLELANE CAPITAL, LLC $33,284,800 0.13% 80,000
CITIGROUP INC $32,675,686 0.13% 78,536
Legacy Advisors, LLC $31,481,606 0.12% 147,372

Showing the top 100 of 924 holders. Create a free account to see every holder, past quarters, search, filters and CSV export.

Key facts CIK 15615 CUSIP 576323109 13F (30d) 97 filings 94 filers Visit website Investor relations