Nasdaq Rejects Listing Application by Cannabis Social Network by Reuters @FortuneMagazine May 24, 2016, 6:39 PM EDT E-mail Tweet Facebook Linkedin Share icons Stock exchange operator Nasdaq has rejected a listing application by MassRoots on the grounds that it may aid in the use and dealing of an illegal substance, the cannabis social networking company said on Tuesday. The rejection, handed down on Monday, may insert roadblocks ahead of other cannabis-related companies seeking to list on a national stock exchange, MassRoots CEO Isaac Dietrich said in a statement. “This will have ripple effects across the entire industry, making it more difficult for cannabis entrepreneurs to raise capital and slow the progression of cannabis legalization in the United States,” Dietrich said. Get Data Sheet, Fortune’s technology newsletter. The Denver-based company, which connects cannabis users, activists, and business people through its mobile applications and web portal, said it planned to appeal the decision. Nasdaq ndaq declined to confirm whether it denied the application or say if such a rejection would set a precedent for cannabis-related companies. The majority of public cannabis companies, including Denver-based MassRoots, are traded over-the-counter, where regulations are less restrictive and trading typically is done between two individuals instead of a centralized exchange like Nasdaq. The DEA Will Make a Decision on Marijuana Within a Few Months At least one company focusing on a cannabis-related products, Insys Therapeutics, is listed on the Nasdaq. The pharmaceutical company is developing a cannabis-based drug. Although cannabis remains classified as an illegal narcotic under U.S. law, it has been legalized for medical use in 23 states since California became the first to do so in 1996. Colorado, Washington, Oregon, Alaska and the District of Columbia have gone a step further and legalized cannabis for recreational use by adults.