Apple made history Thursday when it became the first publicly listed U.S. company to be valued at $1 trillion.

The tech giant's share price climbed well over 2 percent in mid-session trading, boosting it about 9 percent higher since Tuesday, when it announced better-than-expected second-quarter earnings and a buyback of $20 billion worth of its own shares.

The Silicon Valley company's stock has skyrocketed more than 50,000 percent since it went public in 1980, greatly exceeding the S&P 500's impressive 2,000 percent gain during the same period.

