Ernst N Csiszar

Insider

First SEC filing: June 5, 2026 · Latest: June 5, 2026

On this page

Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Initial holdings The stakes this person held when they first started reporting.

Insider at

MTZ selling June 3, 2026

Insider transactions

0 buys (P) 2 sells (S) Net: $-4,365,205 + 93 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

93 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Aug. 14, 2026	MTZ	A	152	—	—	10,968 Direct	+1.41%	Acquired	(price as of 2026-08-20)
Aug. 14, 2026	MTZ	F	34	$297.59	$10,118	10,934 Direct	-0.31%	Disposed	-9.3% (price as of 2026-08-20)
June 3, 2026	MTZ	S	6,500	$371.17	$2,412,605	10,816 Direct	-37.54%	Disposed	-27.3% (price as of 2026-08-20)
May 15, 2026	MTZ	F	23	$434.77	$10,000	17,316 Direct	-0.13%	Disposed	-37.9% (price as of 2026-08-20)
May 15, 2026	MTZ	A	104	—	—	17,339 Direct	+0.60%	Acquired	(price as of 2026-08-20)
March 3, 2026	MTZ	S	6,500	$300.40	$1,952,600	17,235 Direct	-27.39%	Disposed	-10.2% (price as of 2026-08-20)
Feb. 13, 2026	MTZ	F	37	$269.53	$9,973	23,735 Direct	-0.16%	Disposed	0.1% (price as of 2026-08-20)
Feb. 13, 2026	MTZ	A	168	—	—	23,772 Direct	+0.71%	Acquired	(price as of 2026-08-20)
Nov. 14, 2025	MTZ	F	52	$192.22	$9,995	23,604 Direct	-0.22%	Disposed	40.4% (price as of 2026-08-20)
Nov. 14, 2025	MTZ	A	235	—	—	23,656 Direct	+1.00%	Acquired	(price as of 2026-08-20)
Aug. 15, 2025	MTZ	F	56	$178.00	$9,968	23,421 Direct	-0.24%	Disposed	51.6% (price as of 2026-08-20)
Aug. 15, 2025	MTZ	A	254	—	—	23,477 Direct	+1.09%	Acquired	(price as of 2026-08-20)
March 24, 2025	MTZ	S	2,517	$131.63	$331,313	23,000 Direct	-9.86%	Disposed	105.0% (price as of 2026-08-20)
Feb. 14, 2025	MTZ	F	74	$135.78	$10,048	25,517 Direct	-0.29%	Disposed	98.7% (price as of 2026-08-20)
Feb. 14, 2025	MTZ	A	332	—	—	25,591 Direct	+1.31%	Acquired	(price as of 2026-08-20)
Nov. 15, 2024	MTZ	F	74	$135.32	$10,014	25,259 Direct	-0.29%	Disposed	99.4% (price as of 2026-08-20)
Nov. 15, 2024	MTZ	A	333	—	—	25,333 Direct	+1.33%	Acquired	(price as of 2026-08-20)
Aug. 22, 2024	MTZ	S	4,853	$110.96	$538,489	25,000 Direct	-16.26%	Disposed	143.2% (price as of 2026-08-20)
Aug. 15, 2024	MTZ	F	90	$110.78	$9,970	29,853 Direct	-0.30%	Disposed	143.6% (price as of 2026-08-20)
Aug. 15, 2024	MTZ	A	407	—	—	29,943 Direct	+1.38%	Acquired	(price as of 2026-08-20)
May 15, 2024	MTZ	F	98	$106.99	$10,485	29,536 Direct	-0.33%	Disposed	152.2% (price as of 2026-08-20)
May 15, 2024	MTZ	A	443	—	—	29,634 Direct	+1.52%	Acquired	(price as of 2026-08-20)
Feb. 15, 2024	MTZ	F	143	$72.98	$10,436	29,191 Direct	-0.49%	Disposed	269.7% (price as of 2026-08-20)
Feb. 15, 2024	MTZ	A	649	—	—	29,334 Direct	+2.26%	Acquired	(price as of 2026-08-20)
Nov. 15, 2023	MTZ	F	194	$53.68	$10,414	28,685 Direct	-0.67%	Disposed	402.6% (price as of 2026-08-20)
Nov. 15, 2023	MTZ	A	881	—	—	28,879 Direct	+3.15%	Acquired	(price as of 2026-08-20)
Aug. 15, 2023	MTZ	F	111	$93.79	$10,411	27,998 Direct	-0.39%	Disposed	187.7% (price as of 2026-08-20)
Aug. 15, 2023	MTZ	A	504	—	—	28,109 Direct	+1.83%	Acquired	(price as of 2026-08-20)
May 15, 2023	MTZ	F	108	$97.05	$10,481	27,605 Direct	-0.39%	Disposed	178.0% (price as of 2026-08-20)
May 15, 2023	MTZ	A	488	—	—	27,713 Direct	+1.79%	Acquired	(price as of 2026-08-20)
Feb. 15, 2023	MTZ	F	105	$99.72	$10,471	27,225 Direct	-0.38%	Disposed	170.6% (price as of 2026-08-20)
Feb. 15, 2023	MTZ	A	475	—	—	27,330 Direct	+1.77%	Acquired	(price as of 2026-08-20)
Nov. 15, 2022	MTZ	F	114	$92.09	$10,498	26,855 Direct	-0.42%	Disposed	193.0% (price as of 2026-08-20)
Nov. 15, 2022	MTZ	A	514	—	—	26,969 Direct	+1.94%	Acquired	(price as of 2026-08-20)
Aug. 15, 2022	MTZ	F	127	$82.23	$10,443	26,455 Direct	-0.48%	Disposed	228.1% (price as of 2026-08-20)
Aug. 15, 2022	MTZ	A	576	—	—	26,582 Direct	+2.21%	Acquired	(price as of 2026-08-20)
May 13, 2022	MTZ	F	91	$77.74	$7,074	26,006 Direct	-0.35%	Disposed	247.1% (price as of 2026-08-20)
May 13, 2022	MTZ	A	411	—	—	26,097 Direct	+1.60%	Acquired	(price as of 2026-08-20)
Feb. 15, 2022	MTZ	F	76	$92.88	$7,059	25,686 Direct	-0.30%	Disposed	190.5% (price as of 2026-08-20)
Feb. 15, 2022	MTZ	A	344	—	—	25,762 Direct	+1.35%	Acquired	(price as of 2026-08-20)
Dec. 29, 2021	MTZ	G	324	—	—	25,418 Direct	-1.26%	Disposed	(price as of 2026-08-20)
Nov. 15, 2021	MTZ	A	341	—	—	25,818 Direct	+1.34%	Acquired	(price as of 2026-08-20)
Nov. 15, 2021	MTZ	F	76	$93.74	$7,124	25,742 Direct	-0.29%	Disposed	187.8% (price as of 2026-08-20)
Aug. 13, 2021	MTZ	F	76	$93.21	$7,084	25,477 Direct	-0.30%	Disposed	189.5% (price as of 2026-08-20)
Aug. 13, 2021	MTZ	A	343	—	—	25,553 Direct	+1.36%	Acquired	(price as of 2026-08-20)
May 14, 2021	MTZ	F	60	$118.41	$7,105	25,210 Direct	-0.24%	Disposed	127.9% (price as of 2026-08-20)
May 14, 2021	MTZ	A	270	—	—	25,270 Direct	+1.08%	Acquired	(price as of 2026-08-20)
March 29, 2021	MTZ	S	1,564	$91.01	$142,340	25,000 Direct	-5.89%	Disposed	196.5% (price as of 2026-08-20)
March 23, 2021	MTZ	S	1,700	$89.92	$152,864	26,564 Direct	-6.01%	Disposed	200.1% (price as of 2026-08-20)
Feb. 12, 2021	MTZ	F	82	$86.57	$7,099	28,264 Direct	-0.29%	Disposed	211.7% (price as of 2026-08-20)
Feb. 12, 2021	MTZ	A	369	—	—	28,346 Direct	+1.32%	Acquired	(price as of 2026-08-20)
Nov. 13, 2020	MTZ	F	131	$53.85	$7,054	27,977 Direct	-0.47%	Disposed	401.0% (price as of 2026-08-20)
Nov. 13, 2020	MTZ	A	593	—	—	28,108 Direct	+2.16%	Acquired	(price as of 2026-08-20)
Aug. 14, 2020	MTZ	F	152	$46.24	$7,028	27,515 Direct	-0.55%	Disposed	483.5% (price as of 2026-08-20)
Aug. 14, 2020	MTZ	A	690	—	—	27,667 Direct	+2.56%	Acquired	(price as of 2026-08-20)
May 15, 2020	MTZ	F	213	$33.12	$7,055	26,977 Direct	-0.78%	Disposed	714.6% (price as of 2026-08-20)
May 15, 2020	MTZ	A	964	—	—	27,190 Direct	+3.68%	Acquired	(price as of 2026-08-20)
Feb. 14, 2020	MTZ	F	117	$60.50	$7,078	26,226 Direct	-0.44%	Disposed	346.0% (price as of 2026-08-20)
Feb. 14, 2020	MTZ	A	528	—	—	26,343 Direct	+2.05%	Acquired	(price as of 2026-08-20)
Nov. 15, 2019	MTZ	F	71	$71.96	$5,109	25,815 Direct	-0.27%	Disposed	274.9% (price as of 2026-08-20)
Nov. 15, 2019	MTZ	A	322	—	—	25,886 Direct	+1.26%	Acquired	(price as of 2026-08-20)
Sept. 10, 2019	MTZ	S	3,000	$64.53	$193,590	25,564 Direct	-10.50%	Disposed	318.1% (price as of 2026-08-20)
Aug. 15, 2019	MTZ	F	87	$59.08	$5,140	28,564 Direct	-0.30%	Disposed	356.7% (price as of 2026-08-20)
Aug. 15, 2019	MTZ	A	391	—	—	28,651 Direct	+1.38%	Acquired	(price as of 2026-08-20)
May 15, 2019	MTZ	F	107	$47.87	$5,122	28,260 Direct	-0.38%	Disposed	463.6% (price as of 2026-08-20)
May 15, 2019	MTZ	A	483	—	—	28,367 Direct	+1.73%	Acquired	(price as of 2026-08-20)
Feb. 15, 2019	MTZ	F	118	$43.46	$5,128	27,884 Direct	-0.42%	Disposed	520.8% (price as of 2026-08-20)
Feb. 15, 2019	MTZ	A	532	—	—	28,002 Direct	+1.94%	Acquired	(price as of 2026-08-20)
Nov. 15, 2018	MTZ	F	125	$46.45	$5,806	27,470 Direct	-0.45%	Disposed	480.9% (price as of 2026-08-20)
Nov. 15, 2018	MTZ	A	498	—	—	27,595 Direct	+1.84%	Acquired	(price as of 2026-08-20)
Aug. 15, 2018	MTZ	F	130	$44.60	$5,798	27,097 Direct	-0.48%	Disposed	505.0% (price as of 2026-08-20)
Aug. 15, 2018	MTZ	A	518	—	—	27,227 Direct	+1.94%	Acquired	(price as of 2026-08-20)
May 15, 2018	MTZ	F	119	$48.85	$5,813	26,709 Direct	-0.44%	Disposed	452.3% (price as of 2026-08-20)
May 15, 2018	MTZ	A	473	—	—	26,828 Direct	+1.79%	Acquired	(price as of 2026-08-20)
Feb. 15, 2018	MTZ	F	115	$50.60	$5,819	26,355 Direct	-0.43%	Disposed	433.2% (price as of 2026-08-20)
Feb. 15, 2018	MTZ	A	457	—	—	26,470 Direct	+1.76%	Acquired	(price as of 2026-08-20)
Nov. 15, 2017	MTZ	F	145	$39.93	$5,790	26,013 Direct	-0.55%	Disposed	575.7% (price as of 2026-08-20)
Nov. 15, 2017	MTZ	A	579	—	—	26,158 Direct	+2.26%	Acquired	(price as of 2026-08-20)
Aug. 15, 2017	MTZ	F	145	$40.00	$5,800	25,579 Direct	-0.56%	Disposed	574.5% (price as of 2026-08-20)
Aug. 15, 2017	MTZ	A	578	—	—	25,724 Direct	+2.30%	Acquired	(price as of 2026-08-20)
May 15, 2017	MTZ	F	134	$43.35	$5,809	25,146 Direct	-0.53%	Disposed	522.4% (price as of 2026-08-20)
May 15, 2017	MTZ	A	533	—	—	25,280 Direct	+2.15%	Acquired	(price as of 2026-08-20)
Feb. 15, 2017	MTZ	F	148	$39.20	$5,802	24,747 Direct	-0.59%	Disposed	588.3% (price as of 2026-08-20)
Feb. 15, 2017	MTZ	A	590	—	—	24,895 Direct	+2.43%	Acquired	(price as of 2026-08-20)
Nov. 15, 2016	MTZ	F	153	$37.90	$5,799	24,305 Direct	-0.63%	Disposed	611.9% (price as of 2026-08-20)
Nov. 15, 2016	MTZ	A	610	—	—	24,458 Direct	+2.56%	Acquired	(price as of 2026-08-20)
Aug. 15, 2016	MTZ	F	189	$30.58	$5,780	23,848 Direct	-0.79%	Disposed	782.3% (price as of 2026-08-20)
Aug. 15, 2016	MTZ	A	756	—	—	24,037 Direct	+3.25%	Acquired	(price as of 2026-08-20)
May 13, 2016	MTZ	F	272	$21.28	$5,788	23,281 Direct	-1.15%	Disposed	1167.9% (price as of 2026-08-20)
May 13, 2016	MTZ	A	1,086	—	—	23,553 Direct	+4.83%	Acquired	(price as of 2026-08-20)
Feb. 15, 2016	MTZ	F	436	$13.26	$5,781	22,467 Direct	-1.90%	Disposed	1934.8% (price as of 2026-08-20)
Feb. 15, 2016	MTZ	A	1,743	—	—	22,903 Direct	+8.24%	Acquired	(price as of 2026-08-20)
Nov. 13, 2015	MTZ	F	343	$16.81	$5,766	21,160 Direct	-1.60%	Disposed	1505.1% (price as of 2026-08-20)
Nov. 13, 2015	MTZ	A	1,375	—	—	21,503 Direct	+6.83%	Acquired	(price as of 2026-08-20)
Aug. 14, 2015	MTZ	F	331	$17.41	$5,763	20,128 Direct	-1.62%	Disposed	1449.7% (price as of 2026-08-20)
Aug. 14, 2015	MTZ	A	1,327	—	—	20,459 Direct	+6.94%	Acquired	(price as of 2026-08-20)
April 29, 2015	MTZ	A	2,964	—	—	19,132 Direct	+18.33%	Acquired	(price as of 2026-08-20)
Feb. 13, 2015	MTZ	F	278	$20.75	$5,768	16,168 Direct	-1.69%	Disposed	1200.3% (price as of 2026-08-20)
Feb. 13, 2015	MTZ	A	1,114	—	—	16,446 Direct	+7.27%	Acquired	(price as of 2026-08-20)
Nov. 14, 2014	MTZ	F	230	$25.13	$5,780	15,332 Direct	-1.48%	Disposed	973.7% (price as of 2026-08-20)

Showing latest 100 of 159 transactions

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
March 28, 2011	MTZ	Non-Qualified Stock Option (right to buy)	Common Stock (20,000)	$13.68	June 1, 2016	20,000	Disposed
March 28, 2011	MTZ	Non-Qualified Stock Option (right to buy)	Common Stock (20,000)	$10.01	Nov. 1, 2015	20,000	Disposed
June 1, 2006	MTZ	Non-Qualified Stock Option (right to buy)	Common Stock (20,000)	$13.68	June 1, 2016	20,000	Acquired
Nov. 1, 2005	MTZ	Non-Qualified Stock Option (right to buy) [F1]	Common Stock (20,000)	$10.01	Nov. 1, 2015	20,000	Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 1 holding

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
Oct. 19, 2005	MTZ	Common Stock	4,841	Direct