HighVista Strategies’s MasTec MTZ Stock Holding History

HighVista Strategies’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	$2.14M	Buy	5,137 +1,510	+42%	+$577K	0.49%	55
2026 Q1	$1.17M	Sell	3,627 -1,400	-28%	-$379K	0.32%	100
2025 Q4	$1.09M	Sell	5,027 -1,673	-25%	-$351K	0.28%	103
2025 Q3	$1.43M	Sell	6,700 -4,300	-39%	-$787K	0.35%	89
2025 Q2	$1.87M	Sell	11,000 -5,300	-33%	-$763K	0.69%	49
2025 Q1	$1.9M	Buy	+16,300	New	+$2.2M	0.73%	44

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

LPC

Lone Pine Capital Greenwich, Connecticut $16.4B AUM 99.7% 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

HighVista Strategies's MTZ Position: Q2 2026 in Review

HighVista Strategies increased its MasTec (MTZ) stake by 42% in Q2 2026, buying an estimated $577K and bringing the position to 5,137 shares worth $2.14M. The position accounts for 0.49% of the portfolio, ranked #55.

HighVista Strategies first reported a position in MTZ in Q1 2025 and has held it in 6 quarters since. 911 funds tracked by Wall St. Rank hold MTZ as of Q2 2026.

HighVista Strategies held 5,137 shares of MasTec worth $2.14M as of Q2 2026.
HighVista Strategies bought 1,510 MasTec shares in Q2 2026, an estimated $577K.
MasTec made up 0.49% of HighVista Strategies's portfolio in Q2 2026, its #55 holding.
HighVista Strategies first reported a position in MasTec in Q1 2025 and has held it in 6 quarters since.
911 funds tracked by Wall St. Rank held MasTec as of Q2 2026.

Based on HighVista Strategies's 13F filing for Q2 2026, filed 14 Aug 2026.