Atika Capital Management’s MasTec MTZ Stock Holding History

Atika Capital Management’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	$14.8M	Sell	35,500 -22,136	-38%	-$8.46M	0.97%	30
2026 Q1	$18.5M	Buy	57,636 +1,638	+3%	+$443K	2.33%	9
2025 Q4	$12.2M	Buy	55,998 +16,498	+42%	+$3.46M	1.28%	22
2025 Q3	$8.41M	Sell	39,500 -9,700	-20%	-$1.78M	0.68%	42
2025 Q2	$8.39M	Buy	+49,200	New	+$7.09M	0.84%	36
2025 Q1	–	Sell	-52,000	Closed	-$7.08M	–	86
2024 Q4	$7.08M	Buy	+52,000	New	+$6.97M	0.75%	41

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

Atika Capital Management's MTZ Position: Q2 2026 in Review

Atika Capital Management reduced its MasTec (MTZ) stake by 38% in Q2 2026, selling an estimated $8.46M and leaving 35,500 shares worth $14.8M. The position accounts for 0.97% of the portfolio, ranked #30.

Atika Capital Management first reported a position in MTZ in Q4 2024 and has held it in 6 quarters since. The position peaked at $18.5M in Q1 2026. 911 funds tracked by Wall St. Rank hold MTZ as of Q2 2026.

Atika Capital Management held 35,500 shares of MasTec worth $14.8M as of Q2 2026.
Atika Capital Management sold 22,136 MasTec shares in Q2 2026, an estimated $8.46M.
MasTec made up 0.97% of Atika Capital Management's portfolio in Q2 2026, its #30 holding.
Atika Capital Management first reported a position in MasTec in Q4 2024 and has held it in 6 quarters since.
Atika Capital Management's MasTec position peaked at $18.5M in Q1 2026.
911 funds tracked by Wall St. Rank held MasTec as of Q2 2026.

Based on Atika Capital Management's 13F filing for Q2 2026, filed 13 Aug 2026.