In addition to the sibling answers about collecting interest and brokers, lending stock to short sellers is a good thing if you are a long-term investor. Shorts

In addition to the sibling answers about collecting interest and brokers, lending stock to short sellers is a good thing if you are a long-term investor. Shorts put some downward pressure on the price and give you an opportunity to buy more at a reduced cost. Additionally, if your thesis on the company being good is true, those shorts are eventually going to be buying back the stock after it has appreciated, ultimately creating even more upward price pressure in the long-term.