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Insider Trading Intelligence
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EC

Ernst N. Csiszar

MTZ
DIRECTOR · MASTEC INC · CIK 0001341639
FILING MIX · LIFETIME44%/56%
BUYS
26
SELLS
33
TOTAL VALUE
$5.76M
COMPANIES
1
ACTIVE SINCE
Feb 2020
HOLDINGS NOW
10,816
AVG SELL PX
$220.21
TRADE KIND
SHOWING 59 / 59
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
5 backtested trades · 8 horizons · 5 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Ernst N. Csiszar, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d5+40.00%+1.33%+0.28%+1.05%+0.89%—
14d5+40.00%+0.51%-1.29%+1.80%+2.71%—
30d5+20.00%+9.88%+0.69%+9.19%+12.79%—
60d5+0.00%+27.87%+4.94%+22.93%+26.43%—
90d5+0.00%+24.52%+6.95%+17.25%+18.26%—
180d5(1 pending)+0.00%+19.31%+12.83%+6.48%+0.59%—
1y5(1 pending)+25.00%+51.69%+16.12%+35.56%+14.27%—
2y5(3 pending)+0.00%+4.72%+4.25%+0.48%+0.48%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
MTZ · 10,816 shares · as of Jun 3, 2026
07,48614,97222,45729,943202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2020
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 26 buys / 33 sellsCOVERAGE · 26 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
MTZ
MASTEC INC
SALE
6,500$371.17$2.41M10,816Jun 3, 2026Jun 5, 2026 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
104——17,339May 15, 2026May 19, 2026 ↗View →
MTZ
MASTEC INC
SALE
23$434.77$10.0K17,316May 15, 2026May 19, 2026 ↗View →
MTZ
MASTEC INC
SALE
6,500$300.40$1.95M17,235Mar 3, 2026Mar 5, 2026 ↗View →
MTZ
MASTEC INC
SALE
37$269.53$10.0K23,735Feb 13, 2026Feb 18, 2026 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
168——23,772Feb 13, 2026Feb 18, 2026 ↗View →
MTZ
MASTEC INC
SALE
52$192.22$10.0K23,604Nov 14, 2025Nov 18, 2025 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
235——23,656Nov 14, 2025Nov 18, 2025 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
254——23,477Aug 15, 2025Aug 19, 2025 ↗View →
MTZ
MASTEC INC
SALE
56$178.00$10.0K23,421Aug 15, 2025Aug 19, 2025 ↗View →
MTZ
MASTEC INC
SALE
64$157.32$10.1K23,223May 15, 2025May 19, 2025 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
287——23,287May 15, 2025May 19, 2025 ↗View →
MTZ
MASTEC INC
SALE
2,517$131.63$331.3K23,000Mar 24, 2025Mar 26, 2025 ↗View →
MTZ
MASTEC INC
SALE
74$135.78$10.0K25,517Feb 14, 2025Feb 19, 2025 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
332——25,591Feb 14, 2025Feb 19, 2025 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
333——25,333Nov 15, 2024Nov 19, 2024 ↗View →
MTZ
MASTEC INC
SALE
74$135.32$10.0K25,259Nov 15, 2024Nov 19, 2024 ↗View →
MTZ
MASTEC INC
SALE
4,853$110.96$538.5K25,000Aug 22, 2024Aug 26, 2024 ↗View →
MTZ
MASTEC INC
SALE
90$110.78$10.0K29,853Aug 15, 2024Aug 19, 2024 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
407——29,943Aug 15, 2024Aug 19, 2024 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
443——29,634May 15, 2024May 17, 2024 ↗View →
MTZ
MASTEC INC
SALE
98$106.99$10.5K29,536May 15, 2024May 17, 2024 ↗View →
MTZ
MASTEC INC
SALE
143$72.98$10.4K29,191Feb 15, 2024Feb 20, 2024 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
649——29,334Feb 15, 2024Feb 20, 2024 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
881——28,879Nov 15, 2023Nov 17, 2023 ↗View →
MTZ
MASTEC INC
SALE
194$53.68$10.4K28,685Nov 15, 2023Nov 17, 2023 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
504——28,109Aug 15, 2023Aug 17, 2023 ↗View →
MTZ
MASTEC INC
SALE
111$93.79$10.4K27,998Aug 15, 2023Aug 17, 2023 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
488——27,713May 15, 2023May 17, 2023 ↗View →
MTZ
MASTEC INC
SALE
108$97.05$10.5K27,605May 15, 2023May 17, 2023 ↗View →
MTZ
MASTEC INC
SALE
105$99.72$10.5K27,225Feb 15, 2023Feb 17, 2023 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
475——27,330Feb 15, 2023Feb 17, 2023 ↗View →
MTZ
MASTEC INC
SALE
114$92.09$10.5K26,855Nov 15, 2022Nov 17, 2022 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
514——26,969Nov 15, 2022Nov 17, 2022 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
576——26,582Aug 15, 2022Aug 17, 2022 ↗View →
MTZ
MASTEC INC
SALE
127$82.23$10.4K26,455Aug 15, 2022Aug 17, 2022 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
411——26,097May 13, 2022May 17, 2022 ↗View →
MTZ
MASTEC INC
SALE
91$77.74$7.1K26,006May 13, 2022May 17, 2022 ↗View →
MTZ
MASTEC INC
SALE
76$92.88$7.1K25,686Feb 15, 2022Feb 17, 2022 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
344——25,762Feb 15, 2022Feb 17, 2022 ↗View →
MTZ
MASTEC INC
SALEGRANT
Gift
324——25,418Dec 29, 2021Jan 3, 2022 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
341——25,818Nov 15, 2021Nov 17, 2021 ↗View →
MTZ
MASTEC INC
SALE
76$93.74$7.1K25,742Nov 15, 2021Nov 17, 2021 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
343——25,553Aug 13, 2021Aug 17, 2021 ↗View →
MTZ
MASTEC INC
SALE
76$93.21$7.1K25,477Aug 13, 2021Aug 17, 2021 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
270——25,270May 14, 2021May 18, 2021 ↗View →
MTZ
MASTEC INC
SALE
60$118.41$7.1K25,210May 14, 2021May 18, 2021 ↗View →
MTZ
MASTEC INC
SALE
1,564$91.01$142.3K25,000Mar 29, 2021Mar 31, 2021 ↗View →
MTZ
MASTEC INC
SALE
1,700$89.92$152.9K26,564Mar 23, 2021Mar 25, 2021 ↗View →
MTZ
MASTEC INC
SALE
82$86.57$7.1K28,264Feb 12, 2021Feb 17, 2021 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
369——28,346Feb 12, 2021Feb 17, 2021 ↗View →
MTZ
MASTEC INC
SALE
131$53.85$7.1K27,977Nov 13, 2020Nov 17, 2020 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
593——28,108Nov 13, 2020Nov 17, 2020 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
690——27,667Aug 14, 2020Aug 18, 2020 ↗View →
MTZ
MASTEC INC
SALE
152$46.24$7.0K27,515Aug 14, 2020Aug 18, 2020 ↗View →
MTZ
MASTEC INC
SALE
213$33.12$7.1K26,977May 15, 2020May 19, 2020 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
964——27,190May 15, 2020May 19, 2020 ↗View →
MTZ
MASTEC INC
SALE
117$60.50$7.1K26,226Feb 14, 2020Feb 19, 2020 ↗View →
MTZ
MASTEC INC
PURCHASEGRANT
Stock grant
528——26,343Feb 14, 2020Feb 19, 2020 ↗View →
Other insiders · MTZ
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About this filer
CIK 0001341639
ROLE
Director
PRIMARY
MTZ
COMPANIES
1
ACTIVE SINCE
Feb 2020
MARKETPEEL · /INSIDER/0001341639DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

The morning brief, before the bell.

One short email. Insider buys, congressional trades, and plain-English analysis.

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