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MTZ MASTEC INC Insider Trading

Latest: Director Sold $2.4M of Shares · Jun 2026

Multiple insiders have been active at MASTEC INC (MTZ): 4 distinct insiders account for 0 buy filings and 9 sell filings as of Jun 2026. Its highest-significance filing in the last 90 days: Director Ernst N Csiszar sold $2.4M, transaction dated Jun 2026.

9 filings analyzed · Latest 2026-06-05

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Buys
0
Sells
9
Insiders
4
Direction
Net selling

MASTEC INC leadership

CEO
José R. Mas — Chief Executive Officer
CFO
Paul Dimarco — Chief Financial Officer
Chair
Jorge Mas — Chairman of the Board

Historically, stocks have lagged the S&P 500 by a median ~3% over the 90 days after a medium insider sell (n ≈ 4,738, 2024-2026). Past results don't predict the future. How we measure this ↗

June 2026
2026-06-05
medium
6,500 shares
$2,412,605
@ $371.17
Significance 5

Director Ernst N Csiszar sold 6,500 MTZ shares at $371.17 for $2,412,605.00; holds 10,816 post-transaction.

Director Ernst N Csiszar sold 6,500 shares of MASTEC INC at $371.17 on 2026-06-03, reducing his holdings by 37.5% from 17,316 to 10,816 shares. The sale occurred when MTZ was trading 17.8% below its 52-week high of $441.43. Across his prior open-market sales history, his average 90-day return has been +20.5%, though his cross-ticker well-timed rate stands at 0.00%; notably, his one prior sale at MTZ on 2026-03-03 saw a 90-day return of +20.5%, indicating the stock rose after that prior sale. The company's recent quarterly revenue of $3,828,801,000.00 and annual growth rate of +16.2% provide a backdrop of operational expansion, though the P/E of 63.79 reflects elevated valuation.

May 2026
2026-05-06
medium
3,000 shares
$1,251,000
@ $417.00
Significance 5

Director Campbell reduces MTZ stake by ~9% in $1.25M sale amid strong rally

Director Campbell C Robert sold 3,000 shares of Mastec at $417 per share, reducing his holdings by roughly 9% in a transaction totaling $1.25 million. The timing is notable: the stock is trading at its 52-week high and has rallied sharply over recent months, creating a natural window for a director to reduce exposure. Campbell's insider track record shows a single prior purchase in 2023, suggesting he is not a frequent trader—this sale is therefore a meaningful shift in his positioning rather than routine portfolio rebalancing. The company itself remains fundamentally sound with profitable operations and solid revenue growth, so this sale does not appear to reflect operational concerns. Rather, it reads as a director taking profits after significant gains and trimming an overweight position at an opportune moment.

March 2026
2026-03-05
medium
6,500 shares
$1,952,600
@ $300.40
Significance 5

Director Csiszar Ernst N sold 6,500 shares of MTZ at $300.40, reducing holdings by 27.4% to 17.2K shares.

Csiszar Ernst N, a director at MASTEC INC, executed a substantial sale of 6,500 shares at $300.40, totaling $1,952,600.00, which reduced his holdings by 27.4% from 23.7K to 17.2K shares. The sale occurred near the 52-week high of $304.53, with the current price at $295.30. MASTEC is trading at a P/E of 41.07 with annual revenue growth of +16.2%, generating $4.0B in revenue and $160.7M in net income. The director maintains a meaningful post-transaction stake of 17.2K shares, indicating continued alignment with the company despite the sale. The timing of this sale near the 52-week range and the reduction of over one-quarter of prior holdings are material events that merit tracking, particularly given the company's elevated valuation multiple and recent strong price momentum (+34.5% over 90 days).

September 2025
2025-09-22 10b5-1 Plan
low
COO
10,000 shares
$2,004,363
@ $200.44
Significance 4

MasTec COO Robert E Apple sold 10,000 shares (10.0K) at blended average $200.44 on 2025-09-18; still holds 184.2K shares.

Robert E Apple, MasTec's COO, executed 2 separate sales totaling 10,000 shares for $2,004,363.00 at prices near the current market level ($207.07), reducing his stake by 5.1% to 184,249 shares. The transaction occurred when MTZ stock was trading at 52-week highs (current price +0.0% from 52-week high, 52-week range $106.07–$207.07), having appreciated 17.0% over 30 days and 22.2% over 90 days. His prior 5 trades at MTZ show mixed timing outcomes: only 1 of 4 measurable 90-day outcomes was well-timed (the stock fell after the sale), while his most recent MTZ sale on 2025-07-16 saw +1.6% 30-day return, and his 2024-11-26 sale preceded a -16.3% 90-day decline. His cross-ticker track record shows 11 prior sells with a 10.00% well-timed rate and average 90-day returns of +4.9%, indicating his sells have generally missed subsequent gains.

August 2025
2025-08-07
low
EVP, General Counsel
10,000 shares
$1,806,950
@ $180.70
Significance 4

EVP/General Counsel de Cardenas sells 10,000 MTZ shares at $180.70, reducing stake to 101.3K shares

de Cardenas Alberto, Executive Vice President and General Counsel of MasTec Inc., executed 2 separate sales totaling 10,000 shares for $1,806,950.00 at $180.70 on 2025-08-05. This sale reduces his holdings by 9.0% from 111.3K shares to 101.3K shares post-transaction. The transaction occurred at a price $2.28 below the current market price of $182.98, and MasTec's stock has risen 8.8% over the prior 30 days and 23.4% over 90 days, placing the sale near the upper range of the 52-week window. No additional context regarding motivations, scheduled trading plan adherence, or prior transaction patterns is provided in the available data.

July 2025
2025-07-18 10b5-1 Plan
low
COO
10,000 shares
$1,750,000
@ $175.00
Significance 4

MasTec COO Robert Apple sells 10,000 shares at $175.00 (off-peak); stock now $177.67 near 52-week high.

Robert Apple, MasTec's COO, sold 10,000 shares at $175.00 on July 16, 2025, reducing his holding by 4.9% to 194,249 shares with a transaction value of $1,750,000.00. The sale occurred $2.67 below the current price of $177.67, which sits at the 52-week high, and follows a strong 90-day rally of +52.7%. His prior trades at MasTec show mixed outcomes: 4 of 5 prior sales were followed by positive 30-day and 90-day returns, and only 1 of 5 prior sells were well-timed at the 90-day mark. Given the stock's proximity to its 52-week peak and the predominantly positive post-sale price action in his historical MTZ trading pattern, this sale lacks the timing signal typically associated with insider circumspection.

November 2024
2024-11-29 10b5-1 Plan
medium
COO
10,000 shares
$1,500,000
@ $150.00
Significance 4

MasTec COO Robert Apple sold 10,000 MTZ shares at $150.00 on 2024-11-26 for $1,500,000, reducing holding by -5.1%.

Robert Apple, MasTec's Chief Operating Officer, sold 10,000 shares (10.0K shares) at $150.00 on 2024-11-26 for $1,500,000.00 (1.5M), reducing his holdings from 197,202 shares to 187,202 shares. The sale occurred near the 52-week high of $147.94, with the stock currently at $144.06, having appreciated +20.0% over the prior 30 days and +27.3% over 90 days. His prior trades at MasTec consist of 5 recent sells all executed on 2024-11-01, with outcomes not yet measurable. The company's valuation metrics show a P/E of 128.62 and profitability challenges (unprofitable over the most recent full fiscal year), though Q3 revenue of $3.25B represents +22.7% annual growth. The timing of this sale relative to the stock's recent momentum and the insider's elevated position concentration warrant attention.

2024-11-05 10b5-1 Plan
medium
COO
19,023 shares
$2,580,006
@ $135.63
Significance 4

COO Robert E Apple sold 19,023 shares at MTZ for $2.6M on 2024-11-01; holds 197.2K shares post-sale.

Robert E Apple, MasTec's COO, executed seven separate sales totaling 19,023 shares for $2,580,006.00 at prices ranging from $133.03 to $138.87, representing an 8.8% reduction in holdings. The transaction occurred at prices near the 52-week high of $136.54, with the blended average sale price of $135.63 reflecting a tight distribution across the trading day. His two prior sales at MasTec (both on 2024-09-20) showed mixed near-term outcomes: one with a 1.7% 30-day return and another with a -0.3% 30-day return, neither with measurable 90-day results yet. The company's valuation metrics present a notable asymmetry: P/E of 121.91 and full-year net income was negative, yet quarterly revenue stands at $3.3B with 22.7% annual growth and current market cap of $10.8B, warranting attention to whether the sell reflects capital reallocation or valuation concerns.

September 2024
2024-09-24 10b5-1 Plan
medium
COO
20,000 shares
$2,525,400
@ $126.27
Significance 4

MasTec COO Apple sells 20,000 shares at blended $126.27, retains 217.2K shares post-transaction

Robert E Apple, Chief Operating Officer of MasTec Inc (MTZ), executed 2 separate sales on 2024-09-20, selling 10,000 shares at $125.04 and 10,000 shares at $127.50 for a combined $2,525,400.00. The sale reduced his holdings from 237.2K shares to 217.2K shares, a reduction of 8.4%. This transaction occurs within MasTec's recent positive price momentum—the stock is up 10.8% over the prior 30 days and 14.1% over 90 days, trading at $124.00 versus a blended sale price of $126.27. The company faces significant valuation pressure with a P/E ratio of 1240.00, driven by minimal recent profitability (net income of $34.0M on $3.0B quarterly revenue) and full-year unprofitability in the most recent fiscal year. The insider retained a substantial position of 217.2K shares, indicating continued material ownership alignment.

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