Mastec Inc. 13F holders
Of the 44 funds followed here, 13 reported a position in Mastec Inc. in a 13F for the quarter ended 30 June 2026. The largest: Lone Pine Capital, 1.3 million shares worth $559.7 million, 3.4% of its reported book.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| Lone Pine Capital | 1,345,157 | $559.7 million | 3.4% | -185,893 | trimmed | 30 June 2026 | 13F |
| Geode Capital Management | 1,278,139 | $530.4 million | 0.0% | -93,770 | trimmed | 30 June 2026 | 13F |
| FMR LLC | 890,103 | $370.3 million | 0.0% | +262,202 | added | 30 June 2026 | 13F |
| Coatue Management | 517,250 | $215.2 million | 0.4% | -66,347 | trimmed | 30 June 2026 | 13F |
| Citadel Advisors | 405,400 | $168.7 million | 0.0% | -14,878 | trimmed | 30 June 2026 | 13F |
| Third Point | 290,000 | $120.7 million | 2.6% | -30,000 | trimmed | 30 June 2026 | 13F |
| Point72 Asset Management | 177,509 | $73.9 million | 0.1% | -265,649 | trimmed | 30 June 2026 | 13F |
| Two Sigma Investments | 133,769 | $55.7 million | 0.0% | +33,443 | added | 30 June 2026 | 13F |
| Norges Bank | 55,571 | $23.1 million | 0.0% | held | 30 June 2026 | 13F | |
| Millennium Management | 47,098 | $19.6 million | 0.0% | -457,001 | trimmed | 30 June 2026 | 13F |
| Soros Fund Management | 8,275 | $3.4 million | 0.0% | +4,344 | added | 30 June 2026 | 13F |
| Bridgewater Associates | 6,969 | $2.9 million | 0.0% | -33,169 | trimmed | 30 June 2026 | 13F |
| Alyeska | 2,500 | $1.0 million | 0.0% | -84,986 | trimmed | 30 June 2026 | 13F |
Value is what the fund reported.
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Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 29 July 2026 | 13G/A | BlackRock, Inc. and 1 other | 6.4 million | 8.1% | 30 June 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 27 March 2026 | 13G/A | The Vanguard Group and 1 other | 0 | 0.0% | 13 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
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Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short.Fails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 11 September 2026 | 5,912 | $232.20 | SEC |
| 31 August 2026 | 293 | $241.00 | SEC |
| 17 August 2026 | 91 | $297.59 | SEC |
| 11 August 2026 | 5 | $268.28 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.
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Largest in the window: 5,912 on 11 September 2026. A fail is an operational fact about settlement, not a position.Source
Each fund's 13F-HR on EDGAR, linked per row; positions matched to MTZ by CUSIP from the SEC's own fails-to-deliver files; Schedule 13D and 13G from the company's own filing index, each read to confirm the company is the issuer named.
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