Stephen Mandel’s MasTec MTZ Stock Holding History

Stephen Mandel’s Portfolio MTZ Stock Details MTZ Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$560M	Sell	1,345,157 -185,893	-12%	-$71.1M	3.42%	16
2026 Q1	$493M	Buy	+1,531,050	New	+$415M	3.93%	13

Other funds holding MTZ

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Peconic Partners New York $8.04B AUM 107.18% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

HCC

Hill City Capital Boston, Massachusetts $4.28B AUM 80.76% 1-Year Est. Return

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return

First Trust Advisors Wheaton, Illinois $170B AUM 46.21% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Stephen Mandel's MTZ Position: Q2 2026 in Review

Stephen Mandel reduced its MasTec (MTZ) stake by 12% in Q2 2026, selling an estimated $71.1M and leaving 1,345,157 shares worth $560M. The position accounts for 3.42% of the portfolio, ranked #16.

Stephen Mandel first reported a position in MTZ in Q1 2026 and has held it in 2 quarters since. 908 funds tracked by Wall St. Rank hold MTZ as of Q2 2026.

Stephen Mandel held 1,345,157 shares of MasTec worth $560M as of Q2 2026.
Stephen Mandel sold 185,893 MasTec shares in Q2 2026, an estimated $71.1M.
MasTec made up 3.42% of Stephen Mandel's portfolio in Q2 2026, its #16 holding.
Stephen Mandel first reported a position in MasTec in Q1 2026 and has held it in 2 quarters since.
908 funds tracked by Wall St. Rank held MasTec as of Q2 2026.

Based on Lone Pine Capital's 13F filing for Q2 2026, filed 14 Aug 2026.