MasTec Ownership | Who Owns MasTec?

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MasTec Ownership Summary

MasTec is owned by 16.95% institutional investors, 21.48% insiders, and 61.56% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 9.90% of MTZ shares. iShares Core S&P Mid-Cap ETF is the top mutual fund, with 2.53% of its assets in MasTec shares.

MTZ Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	MasTec	16.95%	21.48%	61.56%
Sector	Industrials Stocks	46.77%	12.62%	40.60%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	7.74M	9.90%	$1.65B
Vanguard group	6.01M	7.68%	$1.28B
Blackrock	5.84M	7.49%	$624.79M
Hill city capital, lp	2.15M	2.76%	$458.61M
State street	1.84M	2.35%	$390.96M
Invesco	1.66M	2.13%	$354.20M
Hood river capital management	1.65M	2.11%	$350.38M
Millennium management	1.46M	1.87%	$198.81M
Nordea investment management ab	1.34M	1.72%	$283.26M
Geode capital management	1.13M	1.44%	$239.74M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Hill city capital, lp	2.15M	19.39%	$458.61M
Goodlander investment management	181.00K	14.69%	$38.52M
Legacy advisors	380.71K	10.00%	$81.02M
Electron capital partners	819.09K	7.90%	$174.31M
140 summer partners lp	383.04K	7.08%	$81.51M
Hillman	104.22K	6.85%	$22.18M
Forest avenue capital management lp	421.87K	6.62%	$89.78M
Kirr marbach & co llc /in/	169.78K	6.52%	$36.13M
Muhlenkamp	105.79K	6.12%	$22.51M
Decade renewable partners lp	70.33K	4.68%	$9.58M

Top Buyers

Holder	Shares	% Assets	Change
Victory capital management	946.55K	0.12%	936.75K
Peconic partners	750.00K	4.41%	750.00K
Third point	725.00K	1.72%	725.00K
Fmr	465.60K	0.01%	460.54K
Forest avenue capital management lp	421.87K	6.62%	421.87K

Top Sellers

Holder	Shares	% Assets	Change
D1 capital partners	-	-	-664.83K
Goldman sachs group	324.28K	0.01%	-499.31K
Blackrock funding, inc. /de	7.74M	0.03%	-420.80K
Cooper creek partners management	120.57K	0.79%	-303.35K
Cartenna capital, lp	-	-	-300.00K

New Positions

Holder	Shares	% Assets	Change	Value
Peconic partners	750.00K	4.41%	750.00K	$159.61M
Third point	725.00K	1.72%	725.00K	$154.29M
Forest avenue capital management lp	421.87K	6.62%	421.87K	$89.78M
140 summer partners lp	383.04K	7.08%	383.04K	$81.51M
Hennessy advisors	239.20K	1.76%	239.20K	$50.90M

Sold Out

Holder	Change
Stephens consulting	-2.00
Advisornet financial	-2.00
Tfo-tdc	-3.00
Greenline partners	-3.00
Claris advisors, llc / mo /	-4.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
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%
Dec 31, 2024	508	2.42%	55,033,010	-4.52%	70	1.29%	274	15.61%	147	-
Sep 30, 2024	489	6.30%	57,555,846	-2.93%	73	1.27%	233	11.48%	145	-8.23%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Mid-Cap ETF	1.99M	2.53%	-
Vanguard US Total Market Shares ETF	1.99M	2.52%	-42.56K
Vanguard Total Stock Mkt Idx Inv	1.98M	2.51%	-46.07K
Pacer US Cash Cows 100 ETF	1.66M	2.09%	2.44K
Vanguard Small Cap Index	1.53M	1.94%	-9.97K
Nordea 1 - Global Climate & Envir BI EUR	941.48K	1.19%	-11.76K
Hood River Small-Cap Growth Instl	940.41K	1.19%	49.09K
Vanguard Small Cap Growth Index Inv	862.60K	1.09%	-1.85K
First Trust RBA Amer Indl RenaisTM ETF	807.58K	1.02%	5.05K
Delaware Small Cap Value A	707.93K	0.89%	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
Nov 03, 2025	Love Timothy Michael	CAO	Sell	$397.66K
Sep 29, 2025	Campbell C Robert	-	Sell	$420.78K
Sep 18, 2025	Apple Robert E	COO	Sell	$20.11K
Sep 18, 2025	Apple Robert E	COO	Sell	$1.98M
Sep 11, 2025	Campbell C Robert	-	Sell	$571.17K

Insider Transactions Trends

Date	Buy	Sell
2025 Q4	-	1
2025 Q3	-	7
2025 Q2	-	2
2025 Q1	-	1
2024 Q4	-	14

MTZ Ownership FAQ

Who owns the most shares of MasTec?

MasTec’s largest shareholders are Blackrock funding, inc. /de (7.74M shares, 9.90%), Vanguard group (6.01M shares, 7.68%), and Blackrock (5.84M shares, 7.49%). Together, they hold 25.08% 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?

iShares Core S&P Mid-Cap ETF is the top mutual fund holder of MasTec shares, with 2.53% of its total shares outstanding invested in 1.99M MasTec shares.

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