M
MasTec
MTZ · AI Construction & EPC
$357.71
-7.39 (-2.02%)
As of Jul 15, 2026 close
Institutional Ownership — Q1 2026 (filed through May 26)
Institutional Holders
792
+103 vs Q4 2025
Shares Held
58.0M
-734K QoQ
% of Shares Out
41.0%
32.4M held with sole discretion
Value Held
$20.7B
at $357.71 · Jul 15, 2026 close
5%+ Owners
3
via 13G/13D
% of Shares Out counts only shares held with sole investment discretion. Where two managers share discretion, Form 13F requires each to report the full position, so summing every filer exceeds 100% of shares outstanding for widely-held names.
Holder Map
Block size ∝ position · color = QoQ changeWhale Activity — Q1 2026 Filings
Increased248
Decreased260
New position179
Closed76
Institutional Shares Held by Quarter
Holders
Sortable · search holders| Source | % of Shrs Out | Period | |||||
|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13F | 7,309,609 | +198,355 +2.8% | $2.4B | 9.3% | Mar 31, 2026 | |
| PECONIC PARTNERS LLC | 13F | 3,578,431 | +1,978,431 +123.7% | $1.2B | 4.5% | Mar 31, 2026 | |
| VANGUARD CAPITAL MANAGEMENT LLC | 13F | 2,804,295 | +2,804,295 new | $902.3M | 3.5% | Mar 31, 2026 | |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 13F | 2,770,038 | +2,770,038 new | $891.2M | 3.5% | Mar 31, 2026 | |
| Hill City Capital, LP | 13F | 2,155,000 | +0 +0.0% | $693.3M | 2.7% | Mar 31, 2026 | |
| STATE STREET CORP | 13F | 1,869,788 | +43,366 +2.4% | $601.6M | 2.4% | Mar 31, 2026 | |
| VICTORY CAPITAL MANAGEMENT INC | 13F | 1,592,523 | -1,044,928 -39.6% | $512.4M | 2.0% | Mar 31, 2026 | |
| LONE PINE CAPITAL LLC | 13F | 1,531,050 | +1,531,050 new | $492.6M | 1.9% | Mar 31, 2026 | |
| FIRST TRUST ADVISORS LP | 13F | 1,411,584 | +100,151 +7.6% | $454.2M | 1.8% | Mar 31, 2026 | |
| GEODE CAPITAL MANAGEMENT, LLC | 13F | 1,371,909 | +151,206 +12.4% | $441.5M | 1.7% | Mar 31, 2026 | |
| BANK OF AMERICA CORP /DE/ | 13F | 1,330,066 | +75,100 +6.0% | $427.9M | 1.7% | Mar 31, 2026 | |
| Hood River Capital Management LLC | 13F | 1,295,385 | -188,276 -12.7% | $416.8M | 1.6% | Mar 31, 2026 | |
| Invesco Ltd. | 13F | 1,225,757 | -294,273 -19.4% | $394.4M | 1.6% | Mar 31, 2026 | |
| NORDEA INVESTMENT MANAGEMENT AB | 13F | 733,628 | -416,641 -36.2% | $228.8M | 0.9% | Mar 31, 2026 | |
| DIMENSIONAL FUND ADVISORS LP | 13F | 731,650 | -139,196 -16.0% | $235.3M | 0.9% | Mar 31, 2026 | |
| Electron Capital Partners, LLC | 13F | 713,013 | -91,290 -11.4% | $229.4M | 0.9% | Mar 31, 2026 | |
| AQR CAPITAL MANAGEMENT LLC | 13F | 660,054 | -70,925 -9.7% | $209.5M | 0.8% | Mar 31, 2026 | |
| Bank of New York Mellon Corp | 13F | 656,104 | +19,745 +3.1% | $211.1M | 0.8% | Mar 31, 2026 | |
| CANADA PENSION PLAN INVESTMENT BOARD | 13F | 638,964 | +488,849 +325.6% | $205.6M | 0.8% | Mar 31, 2026 | |
| FMR LLC | 13F | 627,901 | -36,689 -5.5% | $202.0M | 0.8% | Mar 31, 2026 | |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 13F | 604,677 | +46,900 +8.4% | $194.5M | 0.8% | Mar 31, 2026 | |
| MORGAN STANLEY | 13F | 586,743 | +96,832 +19.8% | $188.8M | 0.7% | Mar 31, 2026 | |
| COATUE MANAGEMENT LLC | 13F | 583,597 | -94,312 -13.9% | $187.8M | 0.7% | Mar 31, 2026 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 13F | 511,243 | +9,117 +1.8% | $164.5M | 0.6% | Mar 31, 2026 | |
| MILLENNIUM MANAGEMENT LLC | 13F | 503,199 | -229,074 -31.3% | $161.9M | 0.6% | Mar 31, 2026 | |
| Qube Research & Technologies Ltd | 13F | 485,385 | +124,526 +34.5% | $156.2M | 0.6% | Mar 31, 2026 | |
| GOLDMAN SACHS GROUP INC | 13F | 474,514 | +123,860 +35.3% | $152.7M | 0.6% | Mar 31, 2026 | |
| NORTHERN TRUST CORP | 13F | 472,583 | +16,786 +3.7% | $152.0M | 0.6% | Mar 31, 2026 | |
| Point72 Asset Management, L.P. | 13F | 433,058 | -287,713 -39.9% | $139.3M | 0.5% | Mar 31, 2026 | |
| VANGUARD FIDUCIARY TRUST CO | 13F | 383,817 | +383,817 new | $123.5M | 0.5% | Mar 31, 2026 | |
| UBS Group AG | 13F | 381,115 | -69,888 -15.5% | $122.6M | 0.5% | Mar 31, 2026 | |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 13F | 337,823 | -204,910 -37.8% | $108.7M | 0.4% | Mar 31, 2026 | |
| 140 Summer Partners LP | 13F | 329,220 | -45,029 -12.0% | $105.9M | 0.4% | Mar 31, 2026 | |
| Third Point LLC | 13F | 320,000 | -605,000 -65.4% | $103.0M | 0.4% | Mar 31, 2026 | |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 13F | 316,149 | -2,249 -0.7% | $101.7M | 0.4% | Mar 31, 2026 | |
| BNP PARIBAS FINANCIAL MARKETS | 13F | 313,383 | +142,307 +83.2% | $100.8M | 0.4% | Mar 31, 2026 | |
| CITADEL ADVISORS LLC | 13F | 279,778 | +258,511 +1215.5% | $90.0M | 0.4% | Mar 31, 2026 | |
| Forest Avenue Capital Management LP | 13F | 269,851 | -224,160 -45.4% | $86.8M | 0.3% | Mar 31, 2026 | |
| Assenagon Asset Management S.A. | 13F | 255,222 | +90,682 +55.1% | $82.1M | 0.3% | Mar 31, 2026 | |
| WESTFIELD CAPITAL MANAGEMENT CO LP | 13F | 249,980 | +249,980 new | $80.4M | 0.3% | Mar 31, 2026 | |
| BESSEMER GROUP INC | 13F | 231,965 | +229,129 +8079.3% | $74.6M | 0.3% | Mar 31, 2026 | |
| RAYMOND JAMES FINANCIAL INC | 13F | 231,899 | -42,949 -15.6% | $73.7M | 0.3% | Mar 31, 2026 | |
| AMERIPRISE FINANCIAL INC | 13F | 231,796 | -704 -0.3% | $74.6M | 0.3% | Mar 31, 2026 | |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 13F | 227,284 | +73,615 +47.9% | $73.1M | 0.3% | Mar 31, 2026 | |
| Squarepoint Ops LLC | 13F | 225,650 | +110,969 +96.8% | $72.6M | 0.3% | Mar 31, 2026 | |
| Anomaly Capital Management, LP | 13F | 224,498 | +224,498 new | $72.2M | 0.3% | Mar 31, 2026 | |
| Merewether Investment Management, LP | 13F | 223,061 | -346,079 -60.8% | $71.8M | 0.3% | Mar 31, 2026 | |
| Freestone Grove Partners LP | 13F | 220,400 | -235,217 -51.6% | $70.9M | 0.3% | Mar 31, 2026 | |
| BOWEN HANES & CO INC | 13F | 215,465 | +20,025 +10.2% | $69.3M | 0.3% | Mar 31, 2026 | |
| HENNESSY ADVISORS INC | 13F | 205,100 | -21,500 -9.5% | $66.0M | 0.3% | Mar 31, 2026 |
Page 1 of 16
Derivatives Institutional Owners
13F put/call positions · excluded from ownership totals| Type | Period | |||||
|---|---|---|---|---|---|---|
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Call | 169,500 | +34,900 +25.9% | $54.5M | Mar 31, 2026 | |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Put | 161,600 | +69,100 +74.7% | $52.0M | Mar 31, 2026 | |
| Paloma Partners Management Co | Put | 114,000 | +114,000 new | $36.7M | Mar 31, 2026 | |
| JANE STREET GROUP, LLC | Call | 96,000 | +69,200 +258.2% | $30.9M | Mar 31, 2026 | |
| CITADEL ADVISORS LLC | Call | 83,100 | -2,600 -3.0% | $26.7M | Mar 31, 2026 | |
| Arosa Capital Management LP | Call | 75,000 | +75,000 new | $24.1M | Mar 31, 2026 | |
| SCOPUS ASSET MANAGEMENT, L.P. | Call | 70,000 | -90,000 -56.3% | $22.5M | Mar 31, 2026 | |
| JANE STREET GROUP, LLC | Put | 68,300 | -46,800 -40.7% | $22.0M | Mar 31, 2026 | |
| CITADEL ADVISORS LLC | Put | 57,400 | -43,900 -43.3% | $18.5M | Mar 31, 2026 | |
| Walleye Trading LLC | Call | 32,600 | +26,000 +393.9% | $10.5M | Mar 31, 2026 | |
| SCOPUS ASSET MANAGEMENT, L.P. | Put | 30,000 | -20,000 -40.0% | $9.7M | Mar 31, 2026 | |
| INTRINSIC EDGE CAPITAL MANAGEMENT LLC | Put | 20,000 | +0 +0.0% | $6.4M | Mar 31, 2026 | |
| Jefferies Financial Group Inc. | Put | 10,600 | -26,300 -71.3% | $3.4M | Mar 31, 2026 | |
| PEAK6 LLC | Put | 10,000 | -70,000 -87.5% | $3.2M | Mar 31, 2026 | |
| WELLS FARGO & COMPANY/MN | Call | 10,000 | +10,000 new | $3.2M | Mar 31, 2026 | |
| Polymer Capital Management (US) LLC | Put | 9,000 | +9,000 new | $2.9M | Mar 31, 2026 | |
| Walleye Trading LLC | Put | 8,600 | -200 -2.3% | $2.8M | Mar 31, 2026 | |
| Point72 Asset Management, L.P. | Put | 6,300 | +5,300 +530.0% | $2.0M | Mar 31, 2026 | |
| SIG BROKERAGE, LP | Put | 4,600 | +4,600 new | $1.5M | Mar 31, 2026 | |
| Point72 Asset Management, L.P. | Call | 3,800 | +3,800 new | $1.2M | Mar 31, 2026 | |
| Squarepoint Ops LLC | Call | 3,600 | +3,600 new | $1.2M | Mar 31, 2026 | |
| Walleye Capital LLC | Put | 3,400 | -1,900 -35.8% | $1.1M | Mar 31, 2026 | |
| Walleye Capital LLC | Call | 3,000 | -3,100 -50.8% | $965.2K | Mar 31, 2026 | |
| Jefferies Financial Group Inc. | Call | 2,400 | -12,400 -83.8% | $772.2K | Mar 31, 2026 | |
| TUDOR INVESTMENT CORP ET AL | Put | 2,000 | +2,000 new | $643.5K | Mar 31, 2026 | |
| TUDOR INVESTMENT CORP ET AL | Call | 1,100 | -4,200 -79.2% | $353.9K | Mar 31, 2026 | |
| MILLENNIUM MANAGEMENT LLC | Call | 900 | +900 new | $289.6K | Mar 31, 2026 |
Ownership Events — 13G / 13D
Event-driven, scanned dailyJose Ramon Mas reports 7.8% Schedule 13D/A · amendment | 13D/A | Aug 22, 2025 |
Jorge Mas reports 15.0% Schedule 13D/A · amendment | 13D/A | Aug 22, 2025 |
BlackRock, Inc. reports 6.8% (from 9.2%) Schedule 13G/A · amendment | 13G/A | Apr 17, 2025 |
BlackRock, Inc. reports 9.2% Schedule 13G/A · amendment | 13G/A | Feb 5, 2025 |
NORDEA INVESTMENT MANAGEMENT AB crosses 5.0% Initial Schedule 13G · 1,985,758 shares reported | 13G | Nov 5, 2024 |
 I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS  Jose Mas  2   reports —% (from 7.7%) Schedule 13D/A · amendment | 13D/A | Sep 10, 2024 |
 I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS  Jorge Mas  2   reports —% (from 14.9%) Schedule 13D/A · amendment | 13D/A | Sep 10, 2024 |
VANGUARD GROUP INC reports —% Schedule 13G/A · amendment | 13G/A | Feb 13, 2024 |
NORDEA INVESTMENT MANAGEMENT AB crosses 5.0% Initial Schedule 13G · 3,963,774 shares reported | 13G | Feb 6, 2024 |
BlackRock Inc. reports —% Schedule 13G/A · amendment | 13G/A | Jan 26, 2024 |
Quarterly holdings from SEC Form 13F-HR structured data sets (filed within 45 days of quarter end); 5%+ ownership events from Schedule 13G/13D filings scanned daily via EDGAR. Each row links to the source filing. Est. Avg Cost is a rolling-average estimate — each quarter's added shares priced at that quarter's 13F value ÷ shares, split-adjusted, with history beginning 2024-Q2; positions with one quarter of history or a data-quality flag show “—”.