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MTZ in the 13F filings

Mastec Inc · CUSIP 576323109

Sector · Industrials
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
30 Jun 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 3 Aug 2026
Managers listing it
34
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q1 2026 and Q2 2026; 18 listed it in both
Shares listed
6,627,312
combined, among listed positions
Reported value
$2.7bn
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 15 buyers (opened or added shares) and 23 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -1,284,105.

Managers listing MTZ in Q2 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2026, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

34 of 34 holders

ActionFiling
Lone Pine Capital LLC1,345,157$560m3.42%Trimmed-185,89314 Aug 2026 (the filing on sec.gov)
Invesco Ltd1,241,384$516munder 0.1%Added+15,62714 Aug 2026 (the filing on sec.gov)
Fidelity (FMR LLC)890,103$370munder 0.1%Added+262,20213 Aug 2026 (the filing on sec.gov)
AQR Capital Management LLC657,603$274m0.10%Trimmed-2,45114 Aug 2026 (the filing on sec.gov)
Coatue Management LLC517,250$215m0.44%Trimmed-66,34714 Aug 2026 (the filing on sec.gov)
Third Point LLC290,000$121m2.58%Trimmed-30,00014 Aug 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc282,436$118munder 0.1%Added+221,62914 Aug 2026 (the filing on sec.gov)
Freestone Grove Partners LP246,593$103m0.66%Added+26,19314 Aug 2026 (the filing on sec.gov)
D. E. Shaw & Co.180,243$75munder 0.1%Added+126,88814 Aug 2026 (the filing on sec.gov)
Arrowstreet Capital LP166,345$69munder 0.1%Trimmed-60,93913 Aug 2026 (the filing on sec.gov)
Point72 Asset Management LP156,309$65m0.07%Trimmed-276,74914 Aug 2026 (the filing on sec.gov)
Acadian Asset Management LLC132,007$55m0.07%Added+127,92613 Aug 2026 (the filing on sec.gov)
Two Sigma Investments LP125,069$52munder 0.1%Added+24,74314 Aug 2026 (the filing on sec.gov)
AllianceBernstein LP80,697$26munder 0.1%Trimmed-5,34814 Aug 2026 (the filing on sec.gov)
Voloridge Investment Management LLC45,000$19m0.08%Held014 Aug 2026 (the filing on sec.gov)
Millennium Management LLC43,898$18munder 0.1%Trimmed-459,30114 Aug 2026 (the filing on sec.gov)
Susquehanna International Group LLP26,689$11munder 0.1%Added+14,71114 Aug 2026 (the filing on sec.gov)
PDT Partners LLC25,533$11m0.56%Held014 Aug 2026 (the filing on sec.gov)
Squarepoint Ops LLC24,496$10munder 0.1%Trimmed-201,15414 Aug 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP22,609$9.4m0.07%Trimmed-72,06014 Aug 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC21,846$9.1munder 0.1%Trimmed-2,42914 Aug 2026 (the filing on sec.gov)
Walleye Capital LLC19,475$8.1munder 0.1%Trimmed-39,7073 Aug 2026 (the filing on sec.gov)
Janus Henderson Group Ltd15,153$6.3munder 0.1%Trimmed-12,70214 Aug 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP13,611$5.7munder 0.1%Added+2,51514 Aug 2026 (the filing on sec.gov)
Moore Capital Management LP9,471$3.9m0.06%Newnew14 Aug 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q1 2026 to Q2 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (3)

Exited (6)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
10 in Q3 2024 to 17 in Q2 2026

Tracked managers listing it, at least.

0102030201420182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
MTZ by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20132$108mn.a.n.a.
Q3 20134$27mn.a.n.a.
Q4 20134$130mn.a.n.a.
Q1 20141$128mn.a.n.a.
Q2 20144$46mn.a.n.a.
Q3 20142$31mn.a.n.a.
Q4 20142$16mn.a.n.a.
Q1 20151$3.7mn.a.n.a.
Q2 20152$66mn.a.n.a.
Q3 20151$43mn.a.n.a.
Q3 20161$12mn.a.n.a.
Q4 20165$26mn.a.n.a.
Q1 20173$16mn.a.n.a.
Q2 20171$15mn.a.n.a.
Q3 20172$39mn.a.n.a.
Q4 20175$105mn.a.n.a.
Q1 20183$27mn.a.n.a.
Q2 20182$56mn.a.n.a.
Q3 20184$113mn.a.n.a.
Q4 20184$24mn.a.n.a.
Q1 20194$17mn.a.n.a.
Q2 20194$12mn.a.n.a.
Q3 20199$81mn.a.n.a.
Q4 20195$87mn.a.n.a.
Q1 20204$47mn.a.n.a.
Q2 20204$62mn.a.n.a.
Q3 20207$49mn.a.n.a.
Q4 20205$16mn.a.n.a.
Q1 20215$47mn.a.n.a.
Q2 202110$632mn.a.n.a.
Q3 20216$49mn.a.n.a.
Q4 20214$56mn.a.n.a.
Q1 20223$75mn.a.n.a.
Q2 20223$73mn.a.n.a.
Q3 20224$105mn.a.n.a.
Q4 20224$91mn.a.n.a.
Q1 20235$123mn.a.n.a.
Q2 20237$545mn.a.n.a.
Q3 20236$315mn.a.n.a.
Q4 20236$510m51
Q1 202410$637m65
Q2 20249$1.0bn72
Q3 202410$792m54
Q4 202414$1.1bn87
Q1 202512$575m67
Q2 202515$1.2bn123
Q3 202514$1.3bn68
Q4 202513$1.4bn1819
Q1 202622$2.1bn1819
Q2 202617$2.0bn1523

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

MTZ and KLAC →MTZ and GE →MTZ and LRCX →Choose a stock to compare with MTZ →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own MTZ, latest filings →Back to the 13F Explorer →