MasTec Ownership | Who Owns MasTec?


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MasTec Ownership Summary


MasTec is owned by 15.08% institutional investors, 21.49% insiders, and 63.43% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 9.15% of MTZ shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 2.52% of its assets in MasTec shares.

MTZ Ownership Benchmark


TypeName% Inst% Insiders% Retail
StockMasTec15.08%21.49%63.43%
SectorIndustrials Stocks 47.66%12.52%39.82%

Institutional Shareholders


Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Blackrock funding, inc. /de7.11M9.15%$1.55B
Vanguard group5.93M7.64%$1.29B
Blackrock5.84M7.49%$624.79M
Hill city capital, lp2.15M2.76%$458.61M
State street1.84M2.35%$390.96M
Invesco1.66M2.13%$354.20M
Hood river capital management1.65M2.11%$350.38M
Millennium management1.46M1.87%$198.81M
Geode capital management1.22M1.57%$265.40M
Nordea investment management ab1.15M1.48%$252.13M

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Hill city capital, lp2.15M19.39%$458.61M
Goodlander investment management181.00K14.69%$38.52M
Hillman144.69K10.90%$31.45M
Legacy advisors380.71K8.89%$82.75M
Electron capital partners819.09K7.90%$174.31M
140 summer partners lp383.04K7.08%$81.51M
Kirr marbach & co llc /in/167.56K6.96%$36.42M
Forest avenue capital management lp421.87K6.62%$89.78M
Muhlenkamp105.76K6.18%$22.99M
Decade renewable partners lp70.33K4.68%$9.58M

Top Buyers

HolderShares% AssetsChange
Victory capital management946.55K0.12%936.75K
Peconic partners750.00K4.41%750.00K
Third point725.00K1.72%725.00K
Fmr465.60K0.01%460.54K
Forest avenue capital management lp421.87K6.62%421.87K

Top Sellers

HolderShares% AssetsChange
D1 capital partners---664.83K
Blackrock funding, inc. /de7.11M0.03%-632.11K
Macquarie group---615.97K
Cooper creek partners management120.57K0.79%-303.35K
Cartenna capital, lp---300.00K

New Positions

HolderShares% AssetsChangeValue
Peconic partners750.00K4.41%750.00K$159.61M
Third point725.00K1.72%725.00K$154.29M
Forest avenue capital management lp421.87K6.62%421.87K$89.78M
140 summer partners lp383.04K7.08%383.04K$81.51M
Bowen hanes195.44K1.07%195.44K$42.48M

Sold Out

HolderChange
Tortoise investment management-2.00
Stephens consulting-2.00
New millennium group-2.00
Advisornet financial-2.00
Greenline partners-3.00

Institutional Ownership Trends


DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Dec 31, 2025270-59.70%11,719,627-79.46%150.28%130-61.76%78-65.02%
Sep 30, 2025302-50.81%13,255,656-76.27%160.33%158-50.93%95-48.92%
Jun 30, 202560811.36%55,769,826-0.56%711.39%31911.15%18617.72%
Mar 31, 2025545-1.80%56,221,407-2.28%711.32%286-5.30%1580.64%
Dec 31, 20245082.42%55,033,010-4.52%701.29%27415.61%147-

Top Mutual Funds Shareholders


HolderShares% HoldingChange
Vanguard US Total Market Shares ETF1.99M2.52%-42.56K
Vanguard Total Stock Mkt Idx Inv1.98M2.51%10.59K
iShares Core S&P Mid-Cap ETF1.98M2.51%54.02K
Pacer US Cash Cows 100 ETF1.66M2.09%2.44K
Vanguard Small Cap Index1.43M1.81%-230.00
First Trust RBA Amer Indl RenaisTM ETF1.18M1.50%4.00K
Hood River Small-Cap Growth Instl811.18K1.03%811.18K
Vanguard Small Cap Growth Index Inv794.38K1.01%-13.40K
Nordea 1 - Global Climate & Envir BI EUR794.38K1.01%-19.90K
Delaware Small Cap Value A707.93K0.89%-

Recent Insider Transactions


DateNameRoleActivityValue
Mar 03, 2026Csiszar Ernst N-Sell$1.95M
Nov 03, 2025Love Timothy Michael CAOSell$397.66K
Sep 29, 2025Campbell C Robert-Sell$420.78K
Sep 18, 2025Apple Robert E COOSell$20.11K
Sep 18, 2025Apple Robert E COOSell$1.98M

Insider Transactions Trends


DateBuySell
2026 Q1-1
2025 Q4-1
2025 Q3-7
2025 Q2-2
2025 Q1-1

MTZ Ownership FAQ


Who owns the most shares of MasTec?

MasTec’s largest shareholders are Blackrock funding, inc. /de (7.11M shares, 9.15%), Vanguard group (5.93M shares, 7.64%), and Blackrock (5.84M shares, 7.49%). Together, they hold 24.28% of MasTec’s total shares outstanding.

Does Blackrock own MasTec?

Yes, BlackRock owns 7.49% of MasTec, totaling 5.84M shares as of Jun 2024. This represents 0.01% of BlackRock's total assets, with a market value of 624.79M$. In the last quarter, BlackRock increased its holdings by 294.93K shares, a 5.32% change.

Who is MasTec’s biggest shareholder by percentage of total assets invested?

Hill city capital, lp is MasTec’s biggest shareholder by percentage of total assets invested, with 19.39% of its assets in 2.16M MasTec shares, valued at 458.61M$.

Who is the top mutual fund holder of MasTec shares?

Vanguard US Total Market Shares ETF is the top mutual fund holder of MasTec shares, with 2.52% of its total shares outstanding invested in 1.99M MasTec shares.

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