Mastec Inc: which funds bought and sold

Institutions that bought and sold Mastec shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 497 institutions that filed 13F reports for both quarters added to or opened positions in Mastec, and 366 cut or closed them. Together they added a net 1.5M shares, +2.7% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 1.0M shares (−7.5%); index fund managers were net buyers of 801K shares (+4.5%). 170 opened a new position and 74 sold out entirely.

Bought, Q2 2026 497 institutions, 170 of them new holders Sold, Q2 2026 366 institutions, 74 of them sold out

Net change, all compared +1.5M shares (+2.7%)

Net change, active managers −1.0M shares (−7.5%), 37 bought, 48 sold

Buyers versus sellers

institutions compared, 966

497 bought 103 366 sold

Active managers and hedge funds 37 bought · 48 sold · −1.0M

Index fund managers 10 bought · 2 sold · +801K

Other institutions 450 bought · 316 sold · +1.8M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Jpmorgan Chase & Co	+1.1M +552.5%	1.3M	$567M
T. Rowe Price Investment Management, Inc. Active manager	+594K New position	594K	$247M
Ameriprise Financial Inc	+503K +217.1%	735K	$306M
State Street Corp Index funds	+375K +20.1%	2.2M	$934M
Blackrock, Inc. Index funds	+329K +4.5%	7.6M	$3.2B
FMR LLC Active manager	+262K +41.8%	890K	$370M
Amundi	+228K +132.6%	399K	$166M
Price T Rowe Associates Inc Active manager	+222K +364.5%	282K	$118M
Clearbridge Investments, LLC Active manager	+219K New position	219K	$90.9M
UBS Group AG	+129K +33.8%	510K	$212M
Acadian Asset Management LLC Active manager	+128K +3134.7%	132K	$54.9M
D. E. Shaw & Co., Inc. Hedge fund	+127K +237.8%	180K	$75M
Tortoise Capital Advisors, L.L.C.	+125K +683.7%	144K	$59.8M
Westfield Capital Management Co LP Active manager	+124K +49.8%	374K	$156M
BNP Paribas Financial Markets	+123K +39.3%	437K	$182M
Sumitomo Mitsui Trust Group, Inc.	+115K +1270.0%	124K	$51.7M
Federated Hermes, Inc. Active manager	+114K +110.5%	217K	$90.1M
Peconic Partners LLC	+100K +2.8%	3.7M	$1.5B
Healthcare Of Ontario Pension Plan Trust Fund	+96K +614.0%	112K	$46.6M
Legal & General Group PLC	+90K +98.0%	182K	$75.7M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
T. Rowe Price Investment Management, Inc. Active manager	+594K New position	594K	$247M
FMR LLC Active manager	+262K +41.8%	890K	$370M
Price T Rowe Associates Inc Active manager	+222K +364.5%	282K	$118M
Clearbridge Investments, LLC Active manager	+219K New position	219K	$90.9M
Acadian Asset Management LLC Active manager	+128K +3134.7%	132K	$54.9M
D. E. Shaw & Co., Inc. Hedge fund	+127K +237.8%	180K	$75M
Westfield Capital Management Co LP Active manager	+124K +49.8%	374K	$156M
Federated Hermes, Inc. Active manager	+114K +110.5%	217K	$90.1M
Maplelane Capital, LLC Hedge fund	+89K New position	89K	$36.9M
Zimmer Partners, LP Hedge fund	+85K New position	85K	$35.4M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Millennium Management LLC Hedge fund	−459K −91.3%	44K	$18.3M
Victory Capital Management Inc Active manager	−382K −24.0%	1.2M	$503M
Citadel Advisors LLC Hedge fund	−280K Sold out	0	—
Nomura Asset Management International Inc.	−279K −82.7%	59K	$24.3M
Point72 Asset Management, L.P. Hedge fund	−277K −63.9%	156K	$65M
Nordea Investment Management AB	−204K −27.8%	529K	$225M
Squarepoint Ops LLC Hedge fund	−201K −89.1%	24K	$10.2M
Lone Pine Capital LLC Hedge fund	−186K −12.1%	1.3M	$560M
Manufacturers Life Insurance Company, The	−148K −78.9%	40K	$16.5M
Northwestern Mutual Wealth Management Co	−138K −90.5%	14K	$6M
Balyasny Asset Management L.P. Hedge fund	−129K −99.9%	91	$37,861
Hood River Capital Management LLC	−121K −9.4%	1.2M	$488M
Holocene Advisors, LP Hedge fund	−102K Sold out	0	—
Algert Global LLC Hedge fund	−96K −81.5%	22K	$9.1M
Dimensional Fund Advisors LP	−95K −13.0%	636K	$265M
Geode Capital Management, LLC Index funds	−94K −6.8%	1.3M	$530M
Electron Capital Partners, LLC Hedge fund	−93K −13.0%	620K	$258M
Jane Street Group, LLC	−89K −95.2%	4,464	$1.9M
Trexquant Investment LP Hedge fund	−88K −95.7%	3,994	$1.7M
Alyeska Investment Group, L.P. Hedge fund	−85K −97.1%	2,500	$1M

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Millennium Management LLC Hedge fund	−459K −91.3%	44K	$18.3M
Victory Capital Management Inc Active manager	−382K −24.0%	1.2M	$503M
Citadel Advisors LLC Hedge fund	−280K Sold out	0	—
Point72 Asset Management, L.P. Hedge fund	−277K −63.9%	156K	$65M
Squarepoint Ops LLC Hedge fund	−201K −89.1%	24K	$10.2M
Lone Pine Capital LLC Hedge fund	−186K −12.1%	1.3M	$560M
Balyasny Asset Management L.P. Hedge fund	−129K −99.9%	91	$37,861
Holocene Advisors, LP Hedge fund	−102K Sold out	0	—
Algert Global LLC Hedge fund	−96K −81.5%	22K	$9.1M
Electron Capital Partners, LLC Hedge fund	−93K −13.0%	620K	$258M

New positions

largest by value

Institution	Shares	Value June 30, 2026
T. Rowe Price Investment Management, Inc.Active manager	594K	$247M
Clearbridge Investments, LLCActive manager	219K	$90.9M
Maplelane Capital, LLCHedge fund	89K	$36.9M
Zimmer Partners, LPHedge fund	85K	$35.4M
Aviva PLC	49K	$20.3M
Korea Investment Corp	46K	$19M
Vinva Investment Management Ltd	39K	$16.8M
Covalis Capital LLP	31K	$12.8M
Mitsubishi Ufj Trust & Banking Corp	29K	$12.1M
Capitolis Liquid Global Markets LLC	19K	$7.9M

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Citadel Advisors LLCHedge fund	280K	$90M
Holocene Advisors, LPHedge fund	102K	$32.7M
1832 Asset Management L.P.	61K	$19.6M
Cloudalpha Capital Management Limited/Hong Kong	57K	$18.5M
Exoduspoint Capital Management, LPHedge fund	56K	$18M
Muhlenkamp & Co Inc	43K	$13.8M
Jain Global LLCHedge fund	38K	$12.1M
Summittx Capital, L.P.	26K	$8.5M
Bokf, Na	20K	$6.4M
1060 Capital, LLC	20K	$6.3M

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 909
Ten largest holders: 44.8%
Index fund managers: 31.0%
Active managers and hedge funds: 21.4%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	37	48	15	9	−1.0M	−7.5%
Index fund managers	10	2	0	0	+801K	+4.5%
Other institutions	450	316	155	65	+1.8M	+6.7%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Mastec.

Only managers that filed a holdings report for both quarters are compared (966 here). 30 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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