Equibles

MTZ

Mastec Inc

Company with tickers: MTZ

CIK
15615
CUSIP
576323109
Shares Outstanding
79,018,556
Price History Institutional Holders Short Volume Short Interest Fails to Deliver Financials SEC Filings Earnings Calls Insider Trades Congressional Trades
Holders: 791
Total Value: $16,722,696,286
Total Shares: 51,975,809
Showing 1–100 of 815 holdings by value · page 1 of 9

Institutional Ownership Trend

20 quarters

Holder Concentration

Across 791 13F filers · Δ vs Dec 31, 2025
Top Holder
14.1%
Jun 2023 → Mar 2026 · range 14.1% – 100.0%
−30.6 pts
Top 5
31.8%
Jun 2023 → Mar 2026 · range 31.8% – 100.0%
−60.1 pts
Top 10
45.1%
Jun 2023 → Mar 2026 · range 45.1% – 100.0%
−54.3 pts
HHI
355
Jun 2023 → Mar 2026 · range 355 – 9,993
Broadly held −2,426

Quarterly Activity

vs Dec 31, 2025
New
773
Increased
6
Decreased
9
Sold Out
2
Unchanged
3
Holder count: +771
Institutional value: +4974.2%
Shares held: +3328.2%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds
Mega GOLDMAN SACHS GROUP INC +123,860 474,514
Large Corient Private Wealth LLC +11,593 14,835
Mid INDEPENDENT FINANCIAL GROUP, LLC +40 1,129
Small Bison Wealth, LLC +19 836
Small Essential Partners LLC +5 1,627

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds
Large PEAK6 LLC −103,341 13,376
Large COATUE MANAGEMENT LLC −94,312 583,597
Large Candriam S.C.A. −27,126 27,272
Large STOREBRAND ASSET MANAGEMENT AS −10,487 35,360
Mega HSBC HOLDINGS PLC −4,462 58,370

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD)
Mega BlackRock, Inc. 7,309,609 $2,351,793,590
Mid PECONIC PARTNERS LLC 3,578,431 $1,151,324,389
Mid Hill City Capital, LP 2,155,000 $693,349,700
Mega STATE STREET CORP 1,869,788 $601,585,591
Mega VICTORY CAPITAL MANAGEMENT INC 1,592,523 $512,378,350

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD)
Micro Clearwave Capital, LLC 2,265 $492,343
Small Integrated Investment Consultants, LLC 1,190 $258,670
100 of 100 shown
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Action
Mega BlackRock, Inc. $2,351,793,590 14.06% 7,309,609 View
Mid PECONIC PARTNERS LLC $1,151,324,389 6.88% 3,578,431 View
Mid Hill City Capital, LP $693,349,700 4.15% 2,155,000 View
Mega STATE STREET CORP $601,585,591 3.60% 1,869,788 View
Mega VICTORY CAPITAL MANAGEMENT INC $512,378,350 3.06% 1,592,523 View
Large LONE PINE CAPITAL LLC $492,600,027 2.95% 1,531,050 View
Mega FIRST TRUST ADVISORS LP $454,163,036 2.72% 1,411,584 View
Mega GEODE CAPITAL MANAGEMENT, LLC $441,398,001 2.64% 1,371,909 View
Mega BANK OF AMERICA CORP /DE/ $427,935,433 2.56% 1,330,066 View
Mid Hood River Capital Management LLC $416,777,169 2.49% 1,295,385 View
Mega Invesco Ltd. $394,375,048 2.36% 1,225,757 View
Mega NORDEA INVESTMENT MANAGEMENT AB $236,037,471 1.41% 733,628 View
Mega DIMENSIONAL FUND ADVISORS LP $235,401,068 1.41% 731,650 View
Mid Electron Capital Partners, LLC $229,404,802 1.37% 713,013 View
Mega AQR CAPITAL MANAGEMENT LLC $212,365,770 1.27% 660,054 View
Mega Bank of New York Mellon Corp $211,094,892 1.26% 656,104 View
Mega CANADA PENSION PLAN INVESTMENT BOARD $205,580,277 1.23% 638,964 View
Mega FMR LLC $202,020,866 1.21% 627,901 View
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. $194,548,776 1.16% 604,677 View
Large COATUE MANAGEMENT LLC $187,766,498 1.12% 583,597 View
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $164,487,322 0.98% 511,243 View
Mega MILLENNIUM MANAGEMENT LLC $161,899,246 0.97% 503,199 View
Large Qube Research & Technologies Ltd $156,167,769 0.93% 485,385 View
Mega GOLDMAN SACHS GROUP INC $152,670,133 0.91% 474,514 View
Large Point72 Asset Management, L.P. $139,332,080 0.83% 433,058 View
Mega UBS Group AG $122,619,938 0.73% 381,115 View
Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. $108,691,172 0.65% 337,823 View
Mid 140 Summer Partners LP $105,923,242 0.63% 329,220 View
Mid Third Point LLC $102,956,800 0.62% 320,000 View
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $101,717,774 0.61% 316,149 View
Mega BNP PARIBAS ARBITRAGE, SA $100,827,846 0.60% 313,383 View
Mega CITADEL ADVISORS LLC $90,015,773 0.54% 279,778 View
Mid Forest Avenue Capital Management LP $86,821,860 0.52% 269,851 View
Large Assenagon Asset Management S.A. $82,115,126 0.49% 255,222 View
Large WESTFIELD CAPITAL MANAGEMENT CO LP $80,428,565 0.48% 249,980 View
Large BESSEMER GROUP INC $74,632,413 0.45% 231,965 View
Mega RAYMOND JAMES FINANCIAL INC $74,611,181 0.45% 231,899 View
Mega AMERIPRISE FINANCIAL INC $74,578,043 0.45% 231,796 View
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $73,126,354 0.44% 227,284 View
Large Squarepoint Ops LLC $72,600,631 0.43% 225,650 View
Mid Anomaly Capital Management, LP $72,229,986 0.43% 224,498 View
Mid Merewether Investment Management, LP $71,767,646 0.43% 223,061 View
Large Freestone Grove Partners LP $70,911,496 0.42% 220,400 View
Mid BOWEN HANES & CO INC $69,323,709 0.41% 215,465 View
Mid HENNESSY ADVISORS INC $65,988,874 0.39% 205,100 View
Mega JPMORGAN CHASE & CO $64,992,119 0.39% 202,002 View
Mega MORGAN STANLEY $62,474,506 0.37% 194,177 View
Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE $60,471,033 0.36% 187,950 View
Large LORD, ABBETT & CO. LLC $59,288,316 0.35% 184,274 View
Mid OP Asset Management Ltd $58,985,237 0.35% 183,332 View
Large Vontobel Holding Ltd. $58,067,955 0.35% 180,481 View
Mega Amundi $55,206,399 0.33% 171,587 View
Large Gotham Asset Management, LLC $54,943,539 0.33% 170,770 View
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $54,534,930 0.33% 169,500 View
Mega RHUMBLINE ADVISERS $54,088,676 0.32% 168,113 View
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $51,993,184 0.31% 161,600 View
Mega Nuveen, LLC $51,974,201 0.31% 161,541 View
Small KIRR MARBACH & CO LLC /IN/ $51,541,782 0.31% 160,197 View
Large NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO $49,123,584 0.29% 152,681 View
Small Goodlander Investment Management, LLC $46,652,300 0.28% 145,000 View
Small HILLMAN CO $46,552,238 0.28% 144,689 View
Mega SCHRODER INVESTMENT MANAGEMENT GROUP $46,506,871 0.28% 144,548 View
Large SG Americas Securities, LLC $44,660,407 0.27% 138,809 View
Mid SAMLYN CAPITAL, LLC $44,425,857 0.27% 138,080 View
Mega PRINCIPAL FINANCIAL GROUP INC $44,126,962 0.26% 137,151 View
Mid COUNTRY TRUST BANK $42,357,392 0.25% 131,651 View
Large Balyasny Asset Management L.P. $41,384,772 0.25% 128,628 View
Mega Swiss National Bank $40,539,240 0.24% 126,000 View
Mid ALGERT GLOBAL LLC $37,983,337 0.23% 118,056 View
Mega WELLS FARGO & COMPANY/MN $37,647,438 0.23% 117,012 View
Mega California Public Employees Retirement System $37,426,083 0.22% 116,324 View
Small Paloma Partners Management Co $36,678,360 0.22% 114,000 View
Small Newbrook Capital Advisors LP $36,351,793 0.22% 112,985 View
Small ThornTree Capital Partners LP $36,273,289 0.22% 112,741 View
Mid COMMUNITY TRUST & INVESTMENT CO $35,363,407 0.21% 109,913 View
Large Driehaus Capital Management LLC $33,461,603 0.20% 104,002 View
Large FEDERATED HERMES, INC. $33,108,652 0.20% 102,905 View
Large Holocene Advisors, LP $32,728,679 0.20% 101,724 View
Small Webs Creek Capital Management LP $32,685,566 0.20% 101,590 View
Mega TWO SIGMA INVESTMENTS, LP $32,278,887 0.19% 100,326 View
Mega JENNISON ASSOCIATES LLC $32,008,625 0.19% 99,486 View
Mega JANE STREET GROUP, LLC $30,887,040 0.18% 96,000 View
Mid Brevan Howard Capital Management LP $30,458,804 0.18% 94,669 View
Mega ENVESTNET ASSET MANAGEMENT INC $30,419,873 0.18% 94,548 View
Mega JANE STREET GROUP, LLC $30,229,402 0.18% 93,956 View
Small Legacy Advisors, LLC $30,228,438 0.18% 93,953 View
Large Trexquant Investment LP $29,636,114 0.18% 92,112 View
Mega Legal & General Group Plc $29,555,678 0.18% 91,862 View
Large SEI INVESTMENTS CO $28,669,929 0.17% 89,109 View
Large Alyeska Investment Group, L.P. $28,147,745 0.17% 87,486 View
Mega ALLIANCEBERNSTEIN L.P. $27,684,118 0.17% 86,045 View
Large Quantinno Capital Management LP $27,150,673 0.16% 84,387 View
Mid COOPER CREEK PARTNERS MANAGEMENT LLC $26,931,568 0.16% 83,706 View
Mega CITADEL ADVISORS LLC $26,736,594 0.16% 83,100 View
Mid LGT Group Foundation $26,115,313 0.16% 81,169 View
Mega LPL Financial LLC $26,011,713 0.16% 80,847 View
Large TORONTO DOMINION BANK $25,739,200 0.15% 80,000 View
Small MAKENA CAPITAL MANAGEMENT LLC $25,489,851 0.15% 79,225 View
Large Retirement Systems of Alabama $24,193,561 0.14% 75,196 View
Small Arosa Capital Management LP $24,130,500 0.14% 75,000 View
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