US electric carmaker Tesla said Tuesday it plans to sell up to $5 billion worth of new shares, following weeks of market euphoria around its stock. Tuesday's announcement that up to $5 billion worth of new stakes in the company would be on offer came in a filing with the US market regulator, the SEC. The Californian manufacturer had already announced in August that it would divide its stock by five -- leaving investors with the same value of holdings spread across five times as many shares. That change took effect after markets closed on August 28. Tesla's share price has been on a months-long tear, overtaking the market capitalisation of the world's biggest carmakers. On Monday alone, the stock gained 12.6 percent in New York trades. cd/tgb/wai