HF Sinclair (DINO) Plummets Following Voluntary Leave by CEO

The share price of HF Sinclair Corporation (NYSE:DINO) fell by 12.24% between February 11 and February 18, 2026, putting it among the Energy Stocks that Lost the Most This Week.

HF Sinclair Corporation (NYSE:DINO) is an independent petroleum refiner in the United States with operations throughout the mid-continent, southwestern, and Rocky Mountain regions.

HF Sinclair Corporation (NYSE:DINO) plunged on February 18 following reports that its board member and CEO, Tim Go, was taking a voluntary temporary leave of absence. It was also announced that Board Chair Franklin Myers has stepped in as the interim CEO.

Sinclair revealed that its board’s audit committee is ‘assessing certain matters relating to the company’s disclosure process’, without being more specific. It also ensured that all parties involved in the process aim to finalize the review as soon as possible. Moreover, Sinclair’s board has directed its nominating, governance, and social responsibility committee to decide what action should be taken regarding the CEO’s role.

HF Sinclair Corporation (NYSE:DINO) further came under pressure when, on the same day, Scotiabank analyst Paul Cheng downgraded the stock from ‘Outperform’ to ‘Sector Perform’, while assigning it a price target of $53.

The setback came when HF Sinclair Corporation (NYSE:DINO) also reported strong Q4 2025 results on February 18, beating estimates in both earnings and revenue. The company’s quarterly US refinery margins were up around 45% on average during the quarter compared to the same period in 2024.

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Disclosure: None.