Veteran Investor Removes MasTec Holding from Q1 2026 Portfolio

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By the end of Q1 2026, Ronald Muhlenkamp completely exited his stake in MasTec Inc., removing the holding from his value-oriented portfolio. This full divestment suggests concerns over MasTec’s ability to meet his ROE and growth criteria and may signal reduced institutional support for the stock.

1. Q1 2026 Portfolio Rebalancing

Ronald Muhlenkamp’s Q1 2026 13F filing reveals his patient value strategy, characterized by long holding periods and strict ROE and P/E criteria. During this quarter, he added positions in emerging markets and energy stocks while increasing stakes in industrial chemicals.

2. Complete Exit from MasTec Inc.

Among all adjustments, the only full divestment was his MasTec Inc. position, which he removed entirely from the portfolio by quarter’s end. This move stands out against partial adjustments in other holdings and marks a rare full exit for the value investor.

3. Implications for MasTec’s Stock

The divestment could weigh on MasTec’s share demand, reflecting potential doubts about its future profitability and balance sheet strength. Market participants may view this as a signal to reassess MasTec’s valuation against peer ROE benchmarks and growth prospects.

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