Company · Ownership research

MASTEC INC MTZ

CIK 0000015615 · CUSIP 576323109

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 576323109 (MTZ), not CUSIP 576323909 (MTZ), CUSIP 576323959 (MTZ), and does not merge CUSIPs.

This page lists the top 20 of 355 rows by value; the complete set is available through the API.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$249.72M 1,172,300 shares	0.01%	-105.84K(-8.30%)Reduced	SEC filing ↗ Nov 6, 2026	▾
02	Aberdeen Group plc CIK 1716774 · View history	$161.44M 292,742 shares	0.22%	+285.17K(+3,764.10%)Added	SEC filing ↗ Nov 6, 2026	▾
03	Bank of New York Mellon Corp CIK 1390777 · View history	$141.97M 664,574 shares	0.02%	-9.71K(-1.40%)Reduced	SEC filing ↗ Nov 5, 2026	▾
04	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$137.74M 644,841 shares	0.03%	+8.55K(+1.30%)Added	SEC filing ↗ Nov 4, 2026	▾
05	Amundi CIK 1330387 · View history	$123.37M 577,529 shares	0.02%	+178.43K(+44.70%)Added	SEC filing ↗ Nov 6, 2026	▾
06	CITIGROUP INC CIK 831001 · View history	$51.06M 239,035 shares	0.02%	+160.50K(+204.40%)Added	SEC filing ↗ Nov 4, 2026	▾
07	COUNTRY TRUST BANK CIK 1209324 · View history	$49.83M 233,274 shares	0.86%	+91.77K(+64.90%)Added	SEC filing ↗ Oct 30, 2026	▾
08	HENNESSY ADVISORS INC CIK 1145255 · View history	$42.47M 198,800 shares	1.60%	-6.30K(-3.10%)Reduced	SEC filing ↗ Oct 28, 2026	▾
09	Legacy Advisors, LLC CIK 1720969 · View history	$31.48M 147,372 shares	3.00%	+23.19K(+18.70%)Added	SEC filing ↗ Oct 19, 2026	▾
10	PRINCIPAL FINANCIAL GROUP INC CIK 1126328 · View history	$30.52M 142,893 shares	0.02%	+3.67K(+2.60%)Added	SEC filing ↗ Nov 2, 2026	▾
11	DEUTSCHE BANK AG\ CIK 948046 · View history	$29.40M 137,639 shares	0.01%	+18.91K(+15.90%)Added	SEC filing ↗ Nov 6, 2026	▾
12	BARCLAYS PLC CIK 312069 · View history	$29.22M 136,764 shares	0.01%	+28.69K(+26.50%)Added	SEC filing ↗ Nov 6, 2026	▾
13	DAVENPORT & Co LLC CIK 887777 · View history	$28.64M 135,076 shares	0.15%	+135.08KNew	SEC filing ↗ Oct 14, 2026	▾
14	KIRR MARBACH & CO LLC /IN/ CIK 764112 · View history	$28.10M 131,521 shares	5.31%	-2.21K(-1.60%)Reduced	SEC filing ↗ Oct 20, 2026	▾
15	HILLMAN CO CIK 1036288 · View history	$27.96M 130,909 shares	10.73%	0(0.00%)Unchanged	SEC filing ↗ Oct 28, 2026	▾
16	Sumitomo Mitsui Trust Group, Inc. CIK 1475365 · View history	$26.17M 122,510 shares	0.02%	-1.77K(-1.40%)Reduced	SEC filing ↗ Oct 29, 2026	▾
17	Assenagon Asset Management S.A. CIK 1546007 · View history	$21.63M 101,274 shares	0.02%	-27.93K(-21.60%)Reduced	SEC filing ↗ Oct 15, 2026	▾
18	MAKENA CAPITAL MANAGEMENT LLC CIK 1359262 · View history	$21.06M 98,593 shares	2.19%	+38.14K(+63.10%)Added	SEC filing ↗ Nov 6, 2026	▾
19	COMMUNITY TRUST & INVESTMENT CO CIK 1047142 · View history	$19.88M 93,066 shares	0.99%	+19.30K(+26.20%)Added	SEC filing ↗ Oct 15, 2026	▾
20	Y-Intercept (Hong Kong) Ltd CIK 1772875 · View history	$18.36M 85,962 shares	0.41%	+85.96KNew	SEC filing ↗ Oct 16, 2026	▾

Showing 20 / 355 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

355

Cancelled or null records excluded

Disclosed shares

8,072,597

Not deduplicated across managers

Disclosed value

$1.82B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

MASTEC INC · Q3 2026

Explore all 355 reporting institutions.

This page includes 20 of 355 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.