5 Best Penny Stocks to Buy Under $1

4. Heron Therapeutics, Inc. (NASDAQ:HRTX)

Number of Hedge Fund Holders: 22

Insider Monkey’s proprietary database of 910 hedge funds shows that 22 funds had stakes in Heron Therapeutics, Inc. (NASDAQ:HRTX) The biggest stakeholder of Heron Therapeutics, Inc. (NASDAQ:HRTX) was David Rosen’s Rubric Capital Management which had a $14 million stake in the company.