Shares of Tesla Inc surged past the mark of 2,000 U.S. dollars on Thursday for the first time as the electric car maker extended its recent rally ahead of an upcoming share split.

The company's stock closed at a record high 2,001.83 U.S. dollars, up 6.6 percent for the day. 

With many investors betting Tesla will be added to the S&P 500 after a strong quarterly report last month, the stock has surged over 300 percent this year.

The stock has jumped 45 percent just since August 11, when Tesla announced a five-for-one stock split, with shareholders of record on Friday receiving four additional shares for each share they own, distributed after the close of trading on August 28.

Thursday's surge put Tesla's stock market value at 372 billion U.S. dollars, higher than all but seven of the S&P 500's components. 

Tesla's stock is among the highest priced, per share, on Wall Street, and the Palo Alto, California-based company has said it was looking to make its shares more accessible to employees and investors. 

However, with Robinhood and other brokerages increasingly letting customers by fractions of individual shares, the benefit of stock splits has become less obvious, making Tesla's rally following the announcement of its stock split surprising to some professional investors. 

Tesla's stock is currently priced at an exceedingly high 148 times expected earnings, according to Refinitiv, and that valuation will not be affected by the upcoming stock split.

Tesla will start rolling out "made-in-China" Model Y vehicles at its factory in Shanghai starting in 2021, the Global Times tweeted on Thursday, citing an unnamed executive.

Investors expect important announcements when Tesla holds its long-awaited Battery Day on September 22, the same day as its annual shareholder meeting.

The company is expected to present battery innovations, with analysts at Morgan Stanley predicting a company announcement on supplying "superior" battery packs to the auto industry.