MasTec (MTZ)

MasTec on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials, earnings dates and insider trades. Listed on NYSE, classified by the SEC as water, sewer, pipeline, comm & power line construction.

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4.6M

Short interest

settlement 2026-09-30

2.6

Days to cover

-1.5 days vs prior

36.5%

Short share of volume

2026-10-09

5,912

Fails to deliver

settlement 2026-09-11

Thu 29 Oct

Next earnings

estimated date

Insider flow, 90 days

0 buys, 0 sells

As of 2026-10-09.

Short interest

FINRA, twice a month. The newest 24 settlements in the table, 48 in the chart. JSON

As of 30 September 2026, short interest in MTZ is 4,593,756 shares, down 715,903 shares over the last month. Over the last 48 readings it ranged from 849,740 shares (30 June 2025) to 5,417,357 shares (15 September 2026). At the reported average volume of 1.8M shares a day that is 2.6 days to cover.

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Settlement	Shares short	Change	Avg daily volume	Days to cover
2026-09-30	4,593,756	-15.2%	1,763,262	2.61
2026-09-15	5,417,357	+2.0%	1,323,872	4.09
2026-08-31	5,309,659	+1.1%	1,469,530	3.61
2026-08-14	5,253,497	+18.7%	1,624,982	3.23
2026-07-31	4,427,169	+4.5%	1,655,109	2.67
2026-07-15	4,236,441	-3.8%	997,046	4.25
2026-06-30	4,404,328	+19.6%	1,377,096	3.20
2026-06-15	3,682,003	+10.5%	1,044,365	3.53
2026-05-29	3,333,421	+3.0%	1,410,491	2.36
2026-05-15	3,236,026	+4.1%	1,117,828	2.89
2026-04-30	3,107,809	+3.1%	849,855	3.66
2026-04-15	3,014,187	+6.3%	656,061	4.59
2026-03-31	2,834,389	+10.5%	1,060,166	2.67
2026-03-13	2,564,253	-0.2%	1,092,219	2.35
2026-02-27	2,569,390	+4.6%	1,120,362	2.29
2026-02-13	2,455,571	-12.9%	943,318	2.60
2026-01-30	2,819,453	-7.1%	659,314	4.28
2026-01-15	3,034,907	+25.2%	1,148,984	2.64
2025-12-31	2,424,821	-13.3%	641,457	3.78
2025-12-15	2,795,936	+0.5%	891,554	3.14
2025-11-28	2,782,510	+40.9%	787,027	3.54
2025-11-14	1,974,852	+19.4%	782,765	2.52
2025-10-31	1,654,215	-7.5%	1,119,029	1.48
2025-10-15	1,789,339	+9.6%	966,157	1.85

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 9 October 2026, the short share of MTZ volume is 36.5%, down 22.4 points over the last five sessions. Over the last 30 readings it ranged from 29.5% (2 September 2026) to 68.9% (6 October 2026). The latest reading is 10.0 points below the 30-session average of 46.4%, on 764K shares reported.

Date	Short volume	Total volume	Short share	Exempt
2026-10-09	279K	764K	36.5%	2
2026-10-08	363K	707K	51.4%	10
2026-10-07	369K	555K	66.4%	479
2026-10-06	383K	556K	68.9%	682
2026-10-05	294K	558K	52.7%	430
2026-10-02	324K	550K	58.9%	116
2026-10-01	264K	467K	56.6%	4
2026-09-30	399K	777K	51.3%	654
2026-09-29	366K	646K	56.7%	172
2026-09-28	254K	537K	47.3%	311
2026-09-25	187K	495K	37.8%	1,018
2026-09-24	171K	373K	45.9%	172
2026-09-23	257K	485K	52.9%	88
2026-09-22	330K	683K	48.3%	685
2026-09-21	348K	636K	54.6%	150
2026-09-18	292K	784K	37.3%	810
2026-09-17	832K	2.0M	41.6%	409
2026-09-16	305K	603K	50.6%	4
2026-09-15	200K	609K	32.9%	2,113
2026-09-14	220K	570K	38.7%	3,452
2026-09-11	197K	360K	54.7%	239
2026-09-10	176K	361K	48.6%	4
2026-09-09	149K	321K	46.3%	6
2026-09-08	312K	713K	43.7%	853
2026-09-04	333K	875K	38.0%	6,430
2026-09-03	200K	615K	32.4%	14
2026-09-02	187K	634K	29.5%	65
2026-09-01	225K	703K	32.0%	451
2026-08-31	196K	539K	36.4%	0
2026-08-28	284K	647K	43.9%	802

Fails to deliver

SEC, the last 30 settlement dates with a fail. JSON

As of 11 September 2026, the fails-to-deliver balance in MTZ is 5,912 shares, up 5,619 shares over the last settlement date. Over the last 30 readings it ranged from 4 shares (14 November 2025) to 49,586 shares (22 June 2026).

Settlement	Shares failed	Price	Value
2026-09-11	5,912	$232.20	$1.4M
2026-08-31	293	$241.00	$71K
2026-08-17	91	$297.59	$27K
2026-08-11	5	$268.28	$1K
2026-07-16	512	$357.71	$183K
2026-07-10	50	$384.72	$19K
2026-07-01	37	$416.06	$15K
2026-06-30	48,687	$429.09	$20.9M
2026-06-24	17	$390.44	$7K
2026-06-22	49,586	$379.66	$18.8M
2026-06-18	1,237	$374.91	$464K
2026-06-15	216	$362.97	$78K
2026-06-12	1,891	$358.50	$678K
2026-06-04	3,042	$369.66	$1.1M
2026-05-14	1,443	$423.79	$612K
2026-05-05	1,030	$425.39	$438K
2026-04-20	789	$370.89	$293K
2026-04-09	12	$348.11	$4K
2026-03-26	1,266	$323.55	$410K
2026-03-23	104	$300.58	$31K
2026-03-20	5,952	$312.72	$1.9M
2026-02-27	93	$289.96	$27K
2026-02-25	148	$287.70	$43K
2026-01-23	529	$244.57	$129K
2026-01-21	32,203	$240.35	$7.7M
2026-01-20	669	$242.31	$162K
2025-12-30	86	$222.76	$19K
2025-12-02	4,813	$212.14	$1.0M
2025-11-18	85	$193.39	$16K
2025-11-14	4	$190.08	$760

Insider trades

SEC Form 4, newest first, 50 of 100 shown. JSON

No open-market insider trades were reported for MTZ in the last 90 days. The most recent filings are listed below. Latest filing: Miranda Manuel Benito (Director) on 2026-08-14.

Date	Insider	Title	Type	Shares	Price	Value	Owned after
2026-08-14	Miranda Manuel Benito	Director	Grant	152	$0.00	$0	152
2026-08-14	Palomarez Javier Alberto	Director	Tax withholding	31	$297.59	$9K	11K
2026-08-14	Palomarez Javier Alberto	Director	Grant	139	$0.00	$0	11K
2026-08-14	Spiro Alex	Director	Grant	139	$0.00	$0	139
2026-08-14	Dwyer Robert J	Director	Tax withholding	31	$297.59	$9K	21K
2026-08-14	Dwyer Robert J	Director	Grant	139	$0.00	$0	21K
2026-08-14	JOHNSON JULIA L	Director	Grant	139	$0.00	$0	73K
2026-08-14	Parker Ava L	Director	Tax withholding	20	$297.59	$6K	6K
2026-08-14	Parker Ava L	Director	Grant	177	$0.00	$0	6K
2026-08-14	Csiszar Ernst N	Director	Tax withholding	34	$297.59	$10K	11K
2026-08-14	Csiszar Ernst N	Director	Grant	152	$0.00	$0	11K
2026-08-14	Campbell C Robert	Director	Grant	139	$0.00	$0	31K
2026-06-03	Csiszar Ernst N	Director	Sell	7K	$371.17	$2.4M	11K
2026-05-15	Parker Ava L	Director	Tax withholding	14	$434.77	$6K	5K
2026-05-15	Parker Ava L	Director	Grant	121	$0.00	$0	5K
2026-05-15	Palomarez Javier Alberto	Director	Tax withholding	21	$434.77	$9K	11K
2026-05-15	Palomarez Javier Alberto	Director	Grant	95	$0.00	$0	11K
2026-05-15	JOHNSON JULIA L	Director	Grant	95	$0.00	$0	73K
2026-05-15	Dwyer Robert J	Director	Tax withholding	21	$434.77	$9K	21K
2026-05-15	Dwyer Robert J	Director	Grant	95	$0.00	$0	21K
2026-05-15	Csiszar Ernst N	Director	Tax withholding	23	$434.77	$10K	17K
2026-05-15	Csiszar Ernst N	Director	Grant	104	$0.00	$0	17K
2026-05-15	Campbell C Robert	Director	Grant	95	$0.00	$0	31K
2026-05-04	Campbell C Robert	Director	Sell	3K	$417.00	$1.3M	31K
2026-03-25	Palomarez Javier Alberto	Director	Sell	950	$325.43	$309K	11K
2026-03-18	de Cardenas Alberto	EVP, General Counsel	Grant	6K	$0.00	$0	103K
2026-03-18	MAS JOSE RAMON	CEO	Grant	26K	$0.00	$0	3.3M
2026-03-18	MAS JORGE	Director	Grant	16K	$0.00	$0	4.6M
2026-03-18	DiMarco Paul	CFO	Grant	9K	$0.00	$0	67K
2026-03-18	Apple Robert E	COO	Grant	12K	$0.00	$0	184K
2026-03-17	Love Timothy Michael	CAO	Grant	492	$0.00	$0	10K
2026-03-10	de Cardenas Alberto	EVP, General Counsel	Tax withholding	5K	$297.81	$1.4M	97K
2026-03-10	MAS JOSE RAMON	CEO	Tax withholding	28K	$297.81	$8.4M	3.2M
2026-03-10	MAS JORGE	Director	Tax withholding	16K	$297.81	$4.8M	4.5M
2026-03-10	Apple Robert E	COO	Tax withholding	12K	$297.81	$3.6M	172K
2026-03-03	Csiszar Ernst N	Director	Sell	7K	$300.40	$2.0M	17K
2026-02-13	Palomarez Javier Alberto	Director	Tax withholding	34	$269.53	$9K	12K
2026-02-13	Palomarez Javier Alberto	Director	Grant	154	$0.00	$0	12K
2026-02-13	Parker Ava L	Director	Tax withholding	22	$269.53	$6K	5K
2026-02-13	Parker Ava L	Director	Grant	195	$0.00	$0	5K
2026-02-13	JOHNSON JULIA L	Director	Grant	154	$0.00	$0	73K
2026-02-13	Dwyer Robert J	Director	Tax withholding	34	$269.53	$9K	21K
2026-02-13	Dwyer Robert J	Director	Grant	154	$0.00	$0	21K
2026-02-13	Csiszar Ernst N	Director	Tax withholding	37	$269.53	$10K	24K
2026-02-13	Csiszar Ernst N	Director	Grant	168	$0.00	$0	24K
2026-02-13	Campbell C Robert	Director	Grant	154	$0.00	$0	34K
2025-11-14	Palomarez Javier Alberto	Director	Tax withholding	48	$192.22	$9K	11K
2025-11-14	Palomarez Javier Alberto	Director	Grant	215	$0.00	$0	11K
2025-11-14	Parker Ava L	Director	Tax withholding	31	$192.22	$6K	5K
2025-11-14	Parker Ava L	Director	Grant	274	$0.00	$0	5K

Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.

Planned sales (Form 144)

Newest first. JSON

7 Form 144 notices on file for MTZ worth $8.7M at the prices reported; 0 in the last 90 days worth $0. Latest: ERNEST N CSISZAR filed on 2026-06-03 to sell 6,500 shares ($2.4M) from 2026-06-03.

Filed	Seller	Shares	Market value	Of outstanding	Sale from	Broker
2026-06-03	ERNEST N CSISZARDirector	7K	$2.4M	0.008%	2026-06-03	Morgan Stanley Smith Barney LLC Executive Financial Services
2026-05-04	Campbell C RobertDirector	3K	$1.3M	0.004%	2026-05-04	Raymond James & Associates
2026-03-25	Palomarez Javier AlbertoDirector	950	$307K	0.001%	2026-03-25	Edward Jones
2026-03-03	ERNEST N CSISZARDirector	7K	$2.0M	0.008%	2026-03-03	Morgan Stanley Smith Barney LLC Executive Financial Services
2025-11-03	Love Timothy MichaelOfficer	2K	$398K	0.002%	2025-11-03	Charles Schwab & Co., Inc.
2025-09-30	Campbell C RobertDirector	2K	$421K	0.003%	2025-09-29	Raymond James & Associates
2025-09-18	Robert E AppleOfficer	10K	$2.0M	0.013%	2025-09-18	Merrill Lynch

Large holders (13D and 13G)

One row per reporting person with its latest filing, newest first. JSON

5 holders report 5% or more of MTZ in their latest filing, 4 on Schedule 13D (active intent). The largest reported stake is Jorge Mas at 14.8% of the class (11,872,111 shares), filed 2026-08-13 for an event on 2026-08-11.

Filed	Form	Holder	Shares	Of class	Event
2026-08-13	13D/Ano. 10	Jorge Masindividual	11.9M	14.8%	2026-08-11
2026-08-13	13D/Ano. 10	Jorge Mas Holdings I, LLCcorporation	5.7M	7.1%	2026-08-11
2026-08-13	13D/Ano. 10	Jorge Mas Holdings, LLCcorporation	5.7M	7.1%	2026-08-11
2026-08-13	13D/Ano. 10	Jorge Mas Irrevocable Family Trustother entity	849K	1.1%	2026-08-11
2026-08-13	13D/Ano. 10	Jose Ramon Mas Irrevocable Family Trustother entity	425K	0.5%	2026-08-11
2026-08-13	13D/Ano. 10	Mas Equity Partners III, LLCcorporation	276K	0.3%	2026-08-11
2026-08-13	13D/Ano. 10	Mas Equity Partners, LLCcorporation	276K	0.3%	2026-08-11
2026-08-13	13D/Ano. 10	Mas Family Foundation Inc.corporation	100K	0.1%	2026-08-11
2026-08-13	13D/Ano. 5	Jose Ramon Masindividual	6.2M	7.7%	2026-08-11
2026-08-13	13D/Ano. 5	Jose Ramon Mas Holdings I, LLCcorporation	1.3M	1.6%	2026-08-11
2026-08-13	13D/Ano. 5	Jose Ramon Mas Holdings, LLCcorporation	1.3M	1.6%	2026-08-11
2026-07-29	13G/Ano. 12	BlackRock, Inc.parent holding company	6.4M	8.1%	2026-06-30
2026-03-27	13G/Ano. 9	The Vanguard Groupinvestment adviser	0	0.0%	2026-03-13

13F holders

Tracked managers holding MTZ at their latest 13F. JSON

10 of the 30 tracked managers held MTZ at their latest 13F, $1.39B in total at quarter-end prices. Lone Pine Capital is the largest at $559.7M (3.4% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 7 cut.

Fund	Quarter	Shares	Value	Of portfolio	Change in shares
Lone Pine Capital	2026-06-30	1.3M	$559.7M	3.42%	-186K
AQR Capital Management	2026-06-30	658K	$273.6M	0.10%	-2K
Coatue Management	2026-06-30	517K	$215.2M	0.44%	-66K
Third Point	2026-06-30	290K	$120.7M	2.58%	-30K
D. E. Shaw & Co.	2026-06-30	180K	$75.0M	0.04%	+127K
Point72 Asset Management	2026-06-30	156K	$65.0M	0.07%	-277K
Two Sigma Investments	2026-06-30	125K	$52.0M	0.04%	+25K
Millennium Management	2026-06-30	44K	$18.3M	0.01%	-459K
Soros Fund Management	2026-06-30	8K	$3.4M	0.04%	+4K
Bridgewater Associates	2026-06-30	7K	$2.9M	0.01%	-33K

Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.

Financials

SEC XBRL, as filed. JSON

In Q2 FY 2026 (quarter ended 2026-06-30) MasTec reported revenue of $4.37B, up 23.4% from the same quarter a year earlier, and net income of $130.1M (1.65 diluted EPS). In FY 2025 it generated $545.7M of operating cash flow and spent $77.3M on buybacks.

Cash: $315.6M
Equity: $3.48B
Total assets: $10.93B
Shares outstanding: 80,304,948

Quarterly, last 8 quarters

Quarter	Period end	Revenue	Net income	Margin	Diluted EPS
Q2 FY 2026	2026-06-30	$4.37B	$130.1M	3.0%	1.65
Q1 FY 2026	2026-03-31	$3.83B	$60.8M	1.6%	0.77
Q4 FY 2025derived	2025-12-31	$3.94B	$142.7M	3.6%	n/a
Q3 FY 2025	2025-09-30	$3.97B	$160.7M	4.0%	2.04
Q2 FY 2025	2025-06-30	$3.54B	$85.8M	2.4%	1.09
Q1 FY 2025	2025-03-31	$2.85B	$9.9M	0.3%	0.13
Q4 FY 2024derived	2024-12-31	$3.40B	$74.7M	2.2%	n/a
Q3 FY 2024	2024-09-30	$3.25B	$95.2M	2.9%	1.21

Fiscal years, with buybacks and dividends

Fiscal year	Ends	Revenue	Net income	Operating cash flow	Capex	Buybacks	Dividends
FY 2025	2025-12-31	$14.30B	$399.0M	$545.7M	$260.0M	$77.3M	n/a
FY 2024	2024-12-31	$12.30B	$162.8M	$1.12B	$148.9M	$0	n/a
FY 2023	2023-12-31	$12.00B	-$49.9M	$687.3M	$192.9M	$0	n/a
FY 2022	2022-12-31	$9.78B	$33.4M	$352.3M	$263.4M	$81.3M	n/a
FY 2021	2021-12-31	$7.95B	$328.8M	$793.1M	$170.1M	$0	n/a

Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-07-27 from the cover page.

What this page is

MasTec in the regulatory record

Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.

Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.

This page follows MasTec (MTZ), SEC CIK 15615, listed on NYSE, classified by the SEC as water, sewer, pipeline, comm & power line construction. The cross-market tables live on the short interest and insider transactions hubs.

Source and updates

Short interest: FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-09-30.JSON and CSV
Daily short volume: FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-09.JSON and CSV
Fails to deliver: SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-11.JSON and CSV
Planned sales: SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-06-03.JSON and CSV
Large holders: SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-08-13.JSON and CSV
13F holders: SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
Financials: SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
Earnings dates: SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-07-30.JSON and CSV
Insider trades: SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-08-14.JSON and CSV
Company record: EDGAR filing index for CIK 15615Ticker, name and exchange from the SEC's company list, refreshed weekly.
Rate limits: 10 requests a minute without a key, 30 with a free key from a free account.

How to read it

Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.

Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.

Other companies the SEC classifies as water, sewer, pipeline, comm & power line construction

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Datasets

Frequently Asked Questions

How much of MTZ is sold short?

4,593,756 shares were held short at the 2026-09-30 settlement, 2.6 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.

What is MTZ's daily short volume?

On 2026-10-09, 278,554 of the 763,822 MTZ shares reported to FINRA were sold short, 36.5% of the day's reported volume. Short volume is a flow for one day, not a position.

Does MTZ have fails to deliver?

The SEC's latest file shows 5,912 MTZ shares failed to deliver at settlement 2026-09-11. Fails are reported per settlement date and published twice a month with a lag.

Are MTZ insiders buying or selling?

No open-market insider trades were reported for MTZ in the last 90 days. The most recent filings are listed below. Latest filing: Miranda Manuel Benito (Director) on 2026-08-14.

Have MTZ insiders filed to sell?

7 Form 144 notices on file for MTZ worth $8.7M at the prices reported; 0 in the last 90 days worth $0. Latest: ERNEST N CSISZAR filed on 2026-06-03 to sell 6,500 shares ($2.4M) from 2026-06-03.

Who owns 5% or more of MTZ?

What did MTZ report last quarter?

Which tracked 13F managers own MTZ?

10 of the 30 tracked 13F managers held MTZ shares at their latest filing, $1.39B in all. The largest: Lone Pine Capital (1.3M shares, $559.7M), Cliff Asness's AQR Capital Management (658K shares, $273.6M), Philippe Laffont's Coatue Management (517K shares, $215.2M), Dan Loeb's Third Point (290K shares, $120.7M), D. E. Shaw & Co. (180K shares, $75.0M), Steve Cohen's Point72 Asset Management (156K shares, $65.0M). The table above lists all 10.

Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.