Dimensional Fund Advisors Lp ownership in MTZ / MasTec, Inc.

MasTec, Inc.

US ˙ NYSE ˙ US5763231090

Security	MTZ / MasTec, Inc.
Institution	Dimensional Fund Advisors Lp
Latest Disclosed Ownership	3,087,954 shares
Ownership	3.73%

2018-02-09 - Dimensional Fund Advisors Lp has filed an SC 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 3,087,954 shares of MasTec, Inc. (US:MTZ). This represents 3.73 percent ownership of the company. In their previous filing dated 2017-02-09 , Dimensional Fund Advisors Lp had reported owning 5,363,249 shares, indicating a decrease of -42.42 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File Date	Effective Date	Form	Prev Shares	Latest Shares	ΔShares (Percent)	Ownership (Percent)	ΔOwnership (Percent)
2018-02-09	2018-02-09	13G/A	5,363,249	3,087,954	-42.42	3.73	-42.70
2017-02-09	2017-02-09	13G	4,156,345	5,363,249	29.04	6.51	25.19
2016-02-09	2016-02-09	13G		4,156,345		5.20

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)

File Date	Effective Date	Form	Security	Class	ID	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-05-07	2026-03-31	13F	MASTEC	COM	576323109	731,650	-139,196	-15.98	235,328	24.31	0.0105
2026-02-12	2025-12-31	13F	MASTEC	COM	576323109	870,846	-64,158	-6.86	189,309	-4.85	0.0397
2025-11-12	2025-09-30	13F	MASTEC	COM	576323109	935,004	-170,394	-15.41	198,953	5.60	0.0427
2025-08-12	2025-06-30	13F	MASTEC	COM	576323109	1,105,398	-114,297	-9.37	188,411	32.37	0.0436
2025-05-13	2025-03-31	13F	MASTEC	COM	576323109	1,219,695	39,622	3.36	142,331	-11.41	0.0354
2025-02-13	2024-12-31	13F	MASTEC	COM	576323109	1,180,073	-43,403	-3.55	160,657	6.67	0.0386
2024-11-07	2024-09-30	13F	MASTEC	COM	576323109	1,223,476	14,350	1.19	150,607	16.41	0.0365
2024-08-09	2024-06-30	13F	MASTEC	COM	576323109	1,209,126	-170,871	-12.38	129,378	0.54	0.0338
2024-05-10	2024-03-31	13F	MASTEC	COM	576323109	1,379,997	1,700	0.12	128,685	23.30	0.0348
2024-02-07	2023-12-31	13F	MASTEC	COM	576323109	1,378,297	-17,091	-1.22	104,364	3.92	0.0305
2023-11-09	2023-09-30	13F	MASTEC	COM	576323109	1,395,388	-419,095	-23.10	100,431	-53.08	0.0329
2023-08-09	2023-06-30	13F	MASTEC	COM	576323109	1,814,483	-343,751	-15.93	214,052	5.02	0.0682
2023-05-12	2023-03-31	13F	MASTEC	COM	576323109	2,158,234	-206,118	-8.72	203,823	101,303.98	0.0687
2023-02-09	2022-12-31	13F	MASTEC	COM	576323109	2,364,352	-113,870	-4.59	202	-99.87	0.0596
2022-11-10	2022-09-30	13F	MASTEC	COM	576323109	2,478,222	-75,767	-2.97	157,377	-14.01	0.0604
2022-08-12	2022-06-30	13F	MASTEC	COM	576323109	2,553,989	-108,668	-4.08	183,014	-21.09	0.0656
2022-05-13	2022-03-31	13F	MASTEC	COM	576323109	2,662,657	4,248	0.16	231,913	-5.46	0.0714
2022-02-09	2021-12-31	13F	MASTEC	COM	576323109	2,658,409	-188,073	-6.61	245,315	-0.12	0.0742
2021-11-12	2021-09-30	13F	MASTEC	COM	576323109	2,846,482	-50,581	-1.75	245,608	-20.09	0.0791
2021-08-12	2021-06-30	13F	MASTEC	COM	576323109	2,897,063	-22,036	-0.75	307,373	12.38	0.0973
2021-05-14	2021-03-31	13F	MASTEC	COM	576323109	2,919,099	-125,827	-4.13	273,505	31.74	0.0905
2021-03-08	2020-12-31	13F/A-2	MASTEC	COM	576323109	3,044,926	-100,365	-3.19	207,607	56.40	0.0750
2021-02-11	2020-12-31	13F	MASTEC	COM	576323109	3,044,926	-100,365		207,607		74,976.6135
2020-11-12	2020-09-30	13F	MASTEC	COM	576323109	3,145,291	148,879	4.97	132,737	-1.27	0.0563
2020-08-13	2020-06-30	13F	MASTEC	COM	576323109	2,996,412	141,308	4.95	134,446	43.89	0.0591
2020-05-14	2020-03-31	13F	MASTEC	COM	576323109	2,855,104	156,974	5.82	93,435	-46.03	0.0487
2020-02-14	2019-12-31	13F	MASTEC	COM	576323109	2,698,130	-81,061	-2.92	173,115	-4.07	0.0631
2019-11-12	2019-09-30	13F	MASTEC	COM	576323109	2,779,191	-31,098	-1.11	180,451	24.62	0.0701
2019-08-13	2019-06-30	13F	MASTEC	COM	576323109	2,810,289	6,977	0.25	144,804	7.39	0.0562
2019-08-12	2019-03-31	13F/A-2	MASTEC	COM	576323109	2,803,312	587	0.02	134,837	18.61	0.0537
2019-05-10	2019-03-31	13F	MASTEC	COM	576323109	2,803,312	587		134,837
2019-02-26	2018-12-31	13F/A-1	MASTEC	COM	576323109	2,802,725	48,968	1.78	113,678	-7.54	0.0515
2019-02-13	2018-12-31	13F	MASTEC	COM	576323109	2,802,725	48,968		113,678
2018-11-13	2018-09-30	13F	MASTEC	COM	576323109	2,753,757	-70,836	-2.51	122,954	-14.23	0.0468
2018-08-10	2018-06-30	13F	MASTEC	COM	576323109	2,824,593	-100,965	-3.45	143,346	4.14	0.0571
2018-05-11	2018-03-31	13F	MASTEC	COM	576323109	2,925,558	-162,396	-5.26	137,648	-8.94	0.0574
2018-02-12	2017-12-31	13F	MASTEC	COM	576323109	3,087,954	-170,033	-5.22	151,158	-0.01	0.0627
2017-11-13	2017-09-30	13F	MASTEC	COM	576323109	3,257,987	-346,626	-9.62	151,172	-7.11	0.0661
2017-08-11	2017-06-30	13F	MASTEC	COM	576323109	3,604,613	-875,272	-19.54	162,745	-9.29	0.0751
2017-05-12	2017-03-31	13F	MASTEC	COM	576323109	4,479,885	-883,364	-16.47	179,417	-12.54	0.0857
2017-02-09	2016-12-31	13F	MASTEC	COM	576323109	5,363,249	-253,803	-4.52	205,145	22.80	0.1025
2016-11-10	2016-09-30	13F	MASTEC	COM	576323109	5,617,052	-110,888	-1.94	167,052	30.67	0.0903
2016-08-09	2016-06-30	13F	MASTEC	COM	576323109	5,727,940	542,990	10.47	127,846	21.82	0.0736
2016-05-13	2016-03-31	13F	MASTEC	COM	576323109	5,184,950	1,028,605	24.75	104,943	45.27	0.0628
2016-02-10	2015-12-31	13F	MASTEC	COM	576323109	4,156,345	1,201,540	40.66	72,238	54.44	0.0450
2015-11-13	2015-09-30	13F	MASTEC	COM	576323109	2,954,805	733,073	33.00	46,774	5.95	0.0307
2015-08-14	2015-06-30	13F	MASTEC	COM	576323109	2,221,732	148,758	7.18	44,147	10.34	0.0270
2015-05-14	2015-03-31	13F	MASTEC	COM	576323109	2,072,974	243,541	13.31	40,011	-3.27	0.0253
2015-02-06	2014-12-31	13F	MASTEC	COM	576323109	1,829,433	74,502	4.25	41,364	-23.03	0.0272
2014-11-13	2014-09-30	13F	MASTEC	COM	576323109	1,754,931	78,536	4.68	53,738	4.02	0.0381
2014-08-08	2014-06-30	13F	MASTEC	COM	576323109	1,676,395	174,094	11.59	51,663	-20.84	0.0359
2014-05-14	2014-03-31	13F	MASTEC	COM	576323109	1,502,301	-13,790	-0.91	65,261	31.56	0.0488
2014-02-12	2013-12-31	13F	MASTEC	COM	576323109	1,516,091	145,932	10.65	49,605	19.49	0.0387
2013-11-13	2013-09-30	13F	MASTEC	COM	576323109	1,370,159	19,028	1.41	41,515	-6.61	0.0359
2013-08-15	2013-06-30	13F	MASTEC	COM	576323109	1,351,131	1,351,131		44,451		0.0419

Legend

Shares: The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value: The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price: The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class: This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred

Allocation (%): The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation: The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%): The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis: The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss: This is the market value of the position as of the effective date minus the cost basis.