Apple reached a market value of $2 trillion amid its expansion into digital health.<br />The Wal Street Journal reports that Apple is the first US public company to score a $2 trillion in market value.<br />The valuation comes amid its aggressive expansion into the US digital health space.<br />According to Business Insider Apple wants to be a player across the healthcare "ecosystem."<br />For example, insurance company Aetna offers an Apple Watch app, dubbed Attain.<br />Employers can incorporate into their benefits packages to track workers' fitness and incentivize them to meet health goals.<br />Aetna has over 22-million customers.