BROOMFIELD, Colo.--(BUSINESS WIRE)--ARCA biopharma, Inc. (Nasdaq: ABIO), a biopharmaceutical company developing genetically-targeted therapies for atrial fibrillation, heart failure and other cardiovascular diseases, today announced a 6-for-1 reverse split of its common stock. The reverse stock split became effective on March 4, 2013 at 5:01 p.m. Eastern Time, and ARCA’s common stock will continue trading on The NASDAQ Capital Market, on a split-adjusted basis, when the market opens on Tuesday, March 5, 2013. At the effective time of the reverse stock split, every six shares of ARCA’s issued and outstanding common stock converted automatically into one issued and outstanding share of common stock, without any change in the par value per share. The reverse stock split reduced the number of shares of ARCA’s issued and outstanding common stock from approximately 19.1 million shares to approximately 3.2 million shares. In addition, the reverse stock split effected a proportionate adjustment to the per share exercise price and the number of shares issuable upon the exercise or settlement of all outstanding options and warrants to purchase shares of ARCA’s common stock, and the number of shares reserved for issuance pursuant to ARCA’s existing stock option plans were reduced proportionately. No fractional shares will be issued as a result of the reverse stock split, and stockholders who otherwise would be entitled to a fractional share will receive, in lieu thereof, a cash payment based on the closing sale price of ARCA’s common stock as reported today on the NASDAQ Capital Market. ARCA’s transfer agent will provide instructions to stockholders regarding the process for exchanging shares. Additional information regarding the reverse stock split can be found in ARCA’s definitive proxy statement filed with the Securities and Exchange Commission on February 1, 2013.