While Apple made history on Monday by being the first company with a $3T valuation, it could not hold that mark. According to CNET:
Around 10:45 a.m. on Monday, Jan. 3, Apple stock hit $182.86 per share, which when multiplied by the 16.4 billion shares outstanding, values Apple at about $3 trillion.
$182.86 was the magic price. Apple hit that. Apple passed that. Then shares retreated a tiny bit. That said, it was a record day all around. MacDailyNews says shares in the Cupertino-company hit new intraday and closing highs on the first trading day of the year. They got as high as $182.88 before giving back almost a buck. Shares ended the day at $182.02, leaving Apple with a market value of $2.986 trillion.