Stocks › MTZ
MASTEC INC
MTZ·NYSE·
United States·USD
United States·USD$228.30
+8.90 (+4.06%)
Close · Oct 6, 2026 · Close Prices from Tiingo.com
MTZ
MASTEC INC · NYSE
Nasdaq 100S&P 500
Filings
Default90D1Y5YALL
MTZS&P 500 (rebased)
Congress BuyCongress SellInsider BuyInsider SellForm 1448-K ResultsLobbying
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Daily closes, adjusted for splits and dividends · Close Prices from Tiingo.comHover a marker, every one is a filing · move across the line for the crosshair
Congressional Trades
Recent trades of MTZ by members of U.S. Congress · 16 on record · 7 in the last 12 months
Whale Activity
Position changes in MTZ reported for 2026-06-30 by 17 tracked institutional filers
- Increased5
- New0
- Held0
- Decreased3
- Closed1
- No prior filing8
| Filer | Shares | Value | Change |
|---|---|---|---|
| BlackRock, Inc. | 7.6M | $3.18B | increased |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.8M | $1.18B | increased |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 2.8M | $1.17B | increased |
| Hill City Capital, LP | 2.2M | $896.6M | — |
| 140 Summer Partners LP | 268.2K | $111.6M | — |
| D. E. Shaw & Co., Inc. | 180.2K | $75.0M | increased |
| BOWEN HANES & CO INC | 215.5K | $69.3M | — |
| Point72 Asset Management, L.P. | 156.3K | $65.0M | decreased |
| TWO SIGMA INVESTMENTS, LP | 125.1K | $52.0M | increased |
| SAMLYN CAPITAL, LLC | 100.6K | $41.9M | — |
| MILLENNIUM MANAGEMENT LLC | 43.9K | $18.3M | decreased |
| Atika Capital Management LLC | 35.5K | $14.8M | — |
KeyVex tracks a curated set of large 13F filers plus the largest positions in recent filings, so this is a sample of institutional activity, not the whole market.
Insider Trading
Net shares bought (+) or sold (−) on the open market by MTZ insiders, by quarter · Form 4
Recent Insider Transactions
1,298 transactions on record · newest first
| Insider | Type | Shares | Price | Value | Date | |
|---|---|---|---|---|---|---|
| Csiszar Ernst NDirector | Sale | −6,500 | $371.17 | $2.4M | Jun 3, 2026 | Form 4 ↗ |
| Csiszar Ernst NDirector | Tax withholding | −23 | $434.77 | $10K | May 15, 2026 | Form 4 ↗ |
| Csiszar Ernst NDirector | Grant / award | +104 | $0.00 | $0 | May 15, 2026 | Form 4 ↗ |
| Dwyer Robert JDirector | Tax withholding | −21 | $434.77 | $9K | May 15, 2026 | Form 4 ↗ |
| Dwyer Robert JDirector | Grant / award | +95 | $0.00 | $0 | May 15, 2026 | Form 4 ↗ |
| Parker Ava LDirector | Tax withholding | −14 | $434.77 | $6K | May 15, 2026 | Form 4 ↗ |
| Parker Ava LDirector | Grant / award | +121 | $0.00 | $0 | May 15, 2026 | Form 4 ↗ |
| Campbell C RobertDirector | Grant / award | +95 | $0.00 | $0 | May 15, 2026 | Form 4 ↗ |
| Palomarez Javier AlbertoDirector | Tax withholding | −21 | $434.77 | $9K | May 15, 2026 | Form 4 ↗ |
| Palomarez Javier AlbertoDirector | Grant / award | +95 | $0.00 | $0 | May 15, 2026 | Form 4 ↗ |
| JOHNSON JULIA LDirector | Grant / award | +95 | $0.00 | $0 | May 15, 2026 | Form 4 ↗ |
| Campbell C RobertDirector | Sale | −3,000 | $417.00 | $1.3M | May 4, 2026 | Form 4 ↗ |
| Palomarez Javier AlbertoDirector | Sale | −950 | $325.43 | $309K | Mar 25, 2026 | Form 4 ↗ |
| DiMarco PaulCFO | Grant / award | +9,074 | $0.00 | $0 | Mar 18, 2026 | Form 4 ↗ |
| Apple Robert ECOO | Grant / award | +11.5K | $0.00 | $0 | Mar 18, 2026 | Form 4 ↗ |
| de Cardenas AlbertoEVP, General Counsel | Grant / award | +6,269 | $0.00 | $0 | Mar 18, 2026 | Form 4 ↗ |
| MAS JORGEDirector | Grant / award | +15.8K | $0.00 | $0 | Mar 18, 2026 | Form 4 ↗ |
| MAS JOSE RAMONCEO · Director | Grant / award | +26.4K | $0.00 | $0 | Mar 18, 2026 | Form 4 ↗ |
| Love Timothy MichaelCAO | Grant / award | +492 | $0.00 | $0 | Mar 17, 2026 | Form 4 ↗ |
| MAS JORGEDirector | Tax withholding | −16.0K | $297.81 | $4.8M | Mar 10, 2026 | Form 4 ↗ |
Fund Holders
Mutual funds and ETFs holding MTZ · SEC Form N-PORT
| Fund | Shares | Value | % of fund | As of |
|---|---|---|---|---|
| iShares Core S&P Mid-Cap ETF iShares Trust | 2.1M | $877.3M | 0.71% | Jun 30, 2026 |
| VANGUARD TOTAL STOCK MARKET INDEX FUND VANGUARD INDEX FUNDS | 2.0M | $834.6M | 0.04% | Jun 30, 2026 |
| VANGUARD SMALL-CAP INDEX FUND VANGUARD INDEX FUNDS | 1.4M | $603.2M | 0.32% | Jun 30, 2026 |
| First Trust RBA American Industrial Renaissance ETF First Trust Exchange-Traded Fund VI | 1.2M | $480.7M | 4.18% | Jun 30, 2026 |
| VANGUARD SMALL-CAP GROWTH INDEX FUND VANGUARD INDEX FUNDS | 836.1K | $347.9M | 0.74% | Jun 30, 2026 |
| VANGUARD EXTENDED MARKET INDEX FUND VANGUARD INDEX FUNDS | 706.6K | $294.0M | 0.30% | Jun 30, 2026 |
| Hood River Small-Cap Growth Fund Manager Directed Portfolios | 617.7K | $257.0M | 3.86% | Jun 30, 2026 |
| Global X U.S. Infrastructure Development ETF GLOBAL X FUNDS | 578.8K | $219.0M | 1.62% | May 31, 2026 |
| State Street SPDR S&P MidCap 400SM ETF Trust SPDR S&P MIDCAP 400 ETF TRUST | 474.1K | $197.2M | 0.70% | Jun 30, 2026 |
| Victory Pioneer Fund Victory Portfolios IV | 381.8K | $158.9M | 1.42% | Jun 30, 2026 |
Mutual funds and ETFs whose N-PORT filings list MTZ's shares (CUSIP 576323109), each fund at its latest report since Mar 7, 2026, largest positions first. Bonds, options and short positions are left out.
Activist & Passive Stakes
Schedule 13D / 13G beneficial-ownership filings
- Mas Family Foundation Inc.SCHEDULE 13D/A · activist (13D) · 100.0K shares0.1%
Aug 13, 2026 · ↗ - Mas Equity Partners, LLCSCHEDULE 13D/A · activist (13D) · 276.0K shares0.3%
Aug 13, 2026 · ↗ - Mas Equity Partners III, LLCSCHEDULE 13D/A · activist (13D) · 276.0K shares0.3%
Aug 13, 2026 · ↗ - Jose Ramon Mas Irrevocable Family TrustSCHEDULE 13D/A · activist (13D) · 425.0K shares0.5%
Aug 13, 2026 · ↗ - Jorge Mas Irrevocable Family TrustSCHEDULE 13D/A · activist (13D) · 848.9K shares1.1%
Aug 13, 2026 · ↗ - Jorge Mas Holdings, LLCSCHEDULE 13D/A · activist (13D) · 5.7M shares7.1%
Aug 13, 2026 · ↗ - Jorge Mas Holdings I, LLCSCHEDULE 13D/A · activist (13D) · 5.7M shares7.1%
Aug 13, 2026 · ↗ - Jorge MasSCHEDULE 13D/A · activist (13D) · 11.9M shares14.8%
Aug 13, 2026 · ↗ - Mas Family Foundation Inc.SCHEDULE 13D/A · activist (13D) · 100.0K shares0.1%
Aug 13, 2026 · ↗ - Mas Equity Partners III, LLCSCHEDULE 13D/A · activist (13D) · 276.0K shares0.3%
Aug 13, 2026 · ↗
Corporate Lobbying
Estimated quarterly lobbying spending reported under the LDA, filings naming mastec as client
- CONTINENTAL STRATEGY, LLCMASTEC, INC. · 2026 Q2 · ENG, FUE, UTI$75K
Filing ↗ - CONTINENTAL STRATEGY, LLCMASTEC, INC. · 2026 Q1 · ENG, FUE, UTI$75K
Filing ↗ - CONTINENTAL STRATEGY, LLCMASTEC, INC. · 2025 Q4 · ENG, FUE, UTI$75K
Filing ↗ - CONTINENTAL STRATEGY, LLCMASTEC, INC. · 2025 Q3 · ENG, FUE, UTI$25K
Filing ↗ - CONTINENTAL STRATEGY, LLCMASTEC, INC. · 2025 Q3 · ENG, FUE, UTI—
Filing ↗
Government Contracts
Federal awards to MASTEC INC · USAspending
No federal contract awards found for MASTEC INC.
U.S. Patents
Recent USPTO applications naming MASTEC INC
No USPTO patent applications found for MASTEC INC.
Annual Financials
From MTZ's 10-K filings · XBRL
No annual XBRL figures on record for MTZ. KeyVex's fundamentals cover about 130 large companies so far.
Stock Splits
Every split and reverse split in the price history
- 3-for-2Stock splitJun 20, 2000
- 3-for-2Stock splitMar 3, 1997
Split dates and ratios from the price history · Close Prices from Tiingo.com
Material Events (8-K)
Corporate events filed with the SEC
- 8-K · Items 1.01, 2.03, 9.01Material agreement · Direct financial obligationAug 17, 2026
EDGAR ↗ - 8-K · Items 1.01, 8.01, 9.01Material agreement · Other eventsAug 10, 2026
EDGAR ↗ - 8-K · Items 9.01Jul 31, 2026
EDGAR ↗ - 8-K · Items 2.02, 5.02, 7.01, 9.01Results of operations · Officer / director change · Reg FD disclosureJul 30, 2026
EDGAR ↗ - 8-K · Items 2.03Direct financial obligationJul 20, 2026
EDGAR ↗ - 8-K · Items 1.01, 2.03, 3.02, 5.02, 9.01Material agreement · Direct financial obligation · Unregistered sale of equityJul 7, 2026
EDGAR ↗ - 8-K · Items 5.07Shareholder voteMay 22, 2026
EDGAR ↗
About MASTEC INC
From SEC EDGAR company records
Industry (SIC 1623)Water, Sewer, Pipeline, Comm & Power Line Construction
SectorIndustrials
HeadquartersCORAL GABLES, FL
IncorporatedFL
SEC CIK0000015615 ↗
Former namesBURNUP & SIMS INC