Apple’s market capitalization briefly surpassed $4 trillion just after opening today, making it the third public company to reach that figure. Nvidia reached $4 trillion back in July and is creeping closer to $5 trillion, while Microsoft also hit $4 trillion that same month before dropping down to a $3.9 trillion valuation, but it too has passed $4 trillion again this morning.

Market capitalization is based on the total value of all outstanding Apple shares. We won’t have an updated share count until…