MasTec Ownership | Who Owns MasTec?
MasTec Ownership Summary
MasTec is owned by 72.16% institutional investors, 21.52% insiders, and 6.32% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 9.39% of MTZ shares. iShares Core S&P Mid-Cap ETF is the top mutual fund, with 2.62% of its assets in MasTec shares.
MTZ Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | MasTec | 72.16% | 21.52% | 6.32% |
| Sector | Industrials Stocks | 49.61% | 15.69% | 34.70% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock funding, inc. /de | 7.31M | 9.39% | $2.35B |
| Vanguard group | 5.93M | 7.64% | $1.29B |
| Blackrock | 5.84M | 7.49% | $624.79M |
| Peconic partners | 3.58M | 4.60% | $1.15B |
| Hill city capital, lp | 2.15M | 2.77% | $693.35M |
| State street | 1.87M | 2.40% | $601.59M |
| Victory capital management | 1.59M | 2.05% | $512.38M |
| Lone pine capital | 1.53M | 1.97% | $492.60M |
| First trust advisors lp | 1.41M | 1.81% | $454.16M |
| Geode capital management | 1.37M | 1.76% | $441.49M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Hill city capital, lp | 2.15M | 24.77% | $693.35M |
| Peconic partners | 3.58M | 19.92% | $1.15B |
| Hillman | 144.69K | 18.10% | $46.55M |
| Goodlander investment management | 181.00K | 14.69% | $38.52M |
| Kirr marbach & co llc /in/ | 160.20K | 9.39% | $51.54M |
| Electron capital partners | 713.01K | 8.98% | $229.40M |
| 1060 capital | 19.70K | 7.70% | $6.34M |
| Newbrook capital advisors lp | 112.98K | 6.49% | $36.35M |
| 140 summer partners lp | 329.22K | 6.47% | $105.92M |
| Thorntree capital partners lp | 112.74K | 6.44% | $36.27M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Peconic partners | 3.58M | 19.92% | 1.98M |
| Lone pine capital | 1.53M | 3.93% | 1.53M |
| Canada pension plan investment board | 638.96K | 0.13% | 488.85K |
| Vanguard fiduciary trust | 383.82K | 0.03% | 383.82K |
| Blackrock | 5.84M | 0.01% | 294.93K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Victory capital management | 1.59M | 0.33% | -1.04M |
| D1 capital partners | - | - | -664.83K |
| Macquarie group | - | - | -615.97K |
| Third point | 320.00K | 4.94% | -605.00K |
| Jacobs levy equity management | 8.96K | 0.01% | -596.91K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Lone pine capital | 1.53M | 3.93% | 1.53M | $492.60M |
| Vanguard fiduciary trust | 383.82K | 0.03% | 383.82K | $123.49M |
| Westfield capital management co lp | 249.98K | 0.34% | 249.98K | $80.43M |
| Anomaly capital management, lp | 224.50K | 4.37% | 224.50K | $72.23M |
| Newbrook capital advisors lp | 112.98K | 6.49% | 112.98K | $36.35M |
Sold Out
| Holder | Change |
|---|---|
| Wealth watch advisors | -1.00 |
| Tortoise investment management | -2.00 |
| New millennium group | -2.00 |
| Stephens consulting | -2.00 |
| Advisornet financial | -2.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 31, 2026 | 803 | 12.31% | 56,208,883 | -4.21% | 72 | 1.27% | 422 | 16.57% | 256 | 12.28% |
| Dec 31, 2025 | 270 | -59.70% | 11,719,627 | -79.46% | 15 | 0.28% | 130 | -61.76% | 78 | -65.02% |
| Sep 30, 2025 | 302 | -50.81% | 13,255,656 | -76.27% | 16 | 0.33% | 158 | -50.93% | 95 | -48.92% |
| Jun 30, 2025 | 608 | 11.36% | 55,769,826 | -0.56% | 71 | 1.39% | 319 | 11.15% | 186 | 17.72% |
| Mar 31, 2025 | 545 | -1.80% | 56,221,407 | -2.28% | 71 | 1.32% | 286 | -5.30% | 158 | 0.64% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| iShares Core S&P Mid-Cap ETF | 2.07M | 2.62% | -1.04K |
| Vanguard Total Stock Mkt Idx Inv | 2.01M | 2.54% | 6.95K |
| Vanguard US Total Market Shares ETF | 1.99M | 2.52% | -42.56K |
| Pacer US Cash Cows 100 ETF | 1.66M | 2.09% | 2.44K |
| Vanguard Small Cap Index | 1.45M | 1.84% | -2.83K |
| First Trust RBA Amer Indl RenaisTM ETF | 1.07M | 1.35% | 4.02K |
| Vanguard Small Cap Growth Index Inv | 815.78K | 1.03% | 98.00 |
| Hood River Small-Cap Growth Instl | 721.11K | 0.91% | -90.07K |
| Delaware Small Cap Value A | 707.93K | 0.89% | - |
| Vanguard Institutional Extnd Mkt Idx Tr | 692.27K | 0.88% | 6.88K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Jun 03, 2026 | Csiszar Ernst N | - | Sell | $2.41M |
| May 04, 2026 | Campbell C Robert | - | Sell | $1.25M |
| Mar 25, 2026 | Palomarez Javier Alberto | - | Sell | $309.16K |
| Mar 03, 2026 | Csiszar Ernst N | - | Sell | $1.95M |
| Nov 03, 2025 | Love Timothy Michael | CAO | Sell | $397.66K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q2 | - | 2 |
| 2026 Q1 | - | 2 |
| 2025 Q4 | - | 1 |
| 2025 Q3 | - | 7 |
| 2025 Q2 | - | 2 |
MTZ Ownership FAQ
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