Atika Capital Management Reduces Stake in MasTec

Hedge fund sells off nearly 20% of its shares in construction company

Mar. 12, 2026 at 7:05am

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Atika Capital Management LLC reduced its stake in shares of MasTec, Inc. (NYSE:MTZ) by 19.7% during the 3rd quarter, according to the company's recent 13F filing with the SEC. The hedge fund now owns 39,500 shares of the construction company's stock, down from 49,200 shares previously.

Why it matters

MasTec is a major infrastructure construction company that has seen its stock price rise significantly over the past year. This reduction in Atika Capital's stake could signal a shift in investor sentiment around the company, though it's unclear if this is part of a broader trend or an isolated move by one fund.

The details

Atika Capital Management sold 9,700 shares of MasTec during the 3rd quarter, leaving it with a total of 39,500 shares worth approximately $8.4 million. The firm now owns 0.05% of MasTec's outstanding shares. Several other hedge funds and institutional investors have also recently adjusted their positions in the company.

  • Atika Capital Management reduced its stake in MasTec during the 3rd quarter of 2026.

The players

Atika Capital Management LLC

A hedge fund that previously owned a stake in construction company MasTec, Inc.

MasTec, Inc.

A diversified infrastructure construction company that provides engineering, fabrication, installation and maintenance services across a broad range of end markets.

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The takeaway

This reduction in Atika Capital's stake in MasTec could signal a shift in investor sentiment around the construction company, though it's unclear if this is part of a broader trend or an isolated move by one fund. MasTec's stock has seen significant gains over the past year, and investors will be watching to see if other institutional holders make similar moves.