As the cannabis industry continues to flourish in the United States, investors are on the lookout for the best pot stocks to add to their portfolios. With the increasing acceptance of marijuana for both recreational and medicinal purposes, the market is expected to grow exponentially in 2021. This article will explore some of the top-performing US pot stocks that investors should consider for their 2021 portfolios.

1. Canopy Growth Corporation (TSX: WEED) (NYSE: CGC)

Canopy Growth is one of the largest cannabis companies in the world, with a strong presence in both the recreational and medicinal markets. The company has a robust pipeline of products and a strategic partnership with Constellation Brands, a leading beverage company. Canopy Growth's strong financial position and commitment to innovation make it a top pick for investors looking to capitalize on the cannabis industry's growth.

2. Aurora Cannabis Inc. (TSX: ACB) (NYSE: ACB)

Aurora Cannabis is another major player in the US cannabis market. The company has a diverse product portfolio and a strong distribution network, which has helped it gain a significant market share. Aurora's focus on organic growth and strategic partnerships has made it a favorite among investors. Additionally, the company's recent acquisition of MedReleaf has further strengthened its position in the medicinal cannabis market.

3. Tilray Inc. (NASDAQ: TLRY)

Tilray is a global leader in cannabis research and production, with operations in several countries, including the United States. The company has a strong focus on research and development, which has allowed it to develop innovative products and enter new markets. Tilray's commitment to sustainability and social responsibility has also helped it gain a positive reputation in the industry.

4. Cronos Group Inc. (NASDAQ: CRON)

Cronos Group is a Canadian cannabis company with a significant presence in the US market. The company has a diverse portfolio of products and a strong focus on innovation. Cronos Group's strategic partnerships, including its joint venture with Altria Group Inc., have helped it gain a competitive edge in the industry.

5. Curaleaf Holdings Inc. (NASDAQ: CURLF)

Curaleaf is one of the largest cannabis companies in the United States, with a strong focus on the medicinal market. The company has a robust distribution network and a commitment to quality and patient care. Curaleaf's recent acquisition of Grassroots Cannabis has further expanded its market reach and product offerings.

Case Study: Canopy Growth Corporation

Canopy Growth's partnership with Constellation Brands has been a significant factor in its success. In 2018, Constellation Brands invested $4 billion in Canopy Growth, giving it a 10% stake in the company. This partnership has allowed Canopy Growth to expand its market reach and enter new markets, such as the United States. As a result, the company's revenue has seen significant growth, making it one of the top-performing pot stocks in 2021.

In conclusion, the US cannabis market is expected to grow significantly in 2021, making it an attractive investment opportunity for investors. By focusing on companies with strong financial positions, innovative products, and strategic partnerships, investors can capitalize on the industry's growth. As always, it's important to do thorough research and consult with a financial advisor before making any investment decisions.