OraSure Technologies Inc. (OSUR) is considered one of the most profitable penny stocks to invest in. According to Yahoo Finance, this company shows great potential for investors looking to make a profit in the stock market. OraSure Technologies Inc. has a strong track record of success and has proven to be a lucrative option for those interested in penny stocks. With its solid financial performance and promising future outlook, OSUR continues to attract investors seeking to capitalize on its growth potential.