1. High operating costs - Suncor Energy Inc. may have higher operating costs compared to its peers, which can impact its profitability and competitiveness in the market.

2. Reliance on oil prices - As an energy company, Suncor Energy Inc. is heavily dependent on oil prices. Fluctuations in oil prices can significantly impact the company's financial performance and stability.

3. Environmental concerns - Suncor Energy Inc. operates in the oil and gas industry, which is often associated with environmental concerns. The company may face criticism and regulatory challenges related to its carbon emissions and environmental impact.

4. Limited diversification - Suncor Energy Inc. primarily focuses on oil sands and conventional oil production, which may limit its diversification compared to peers that have a broader range of energy sources or business segments.

5. Vulnerability to geopolitical risks - Suncor Energy Inc. operates in various regions globally, exposing it to geopolitical risks such as political instability, regulatory changes, and trade disputes. These risks can impact the company's operations and profitability.

6. Capital-intensive operations - Suncor Energy Inc.'s operations require significant capital investments for exploration, production, and infrastructure development. This capital-intensive nature of the business can pose financial challenges and limit the company's flexibility compared to peers with lower capital requirements.