Apple Is Not The Most Valuable Company In The History Of The World — IBM Won The Prize In 1967 With A Value of $1.3 Trillion | TechCrunch

More market cap math

"Apple is not the most valuable company in the history of the world. It’s not even Microsoft, which was reported to have been toppled by Apple today.
It’s IBM by a long shot.
Apple’s $661 billion market share does not account for inflation.  With inflation in account, IBM remains the historic winner with a 1967 value of $1.3 trillion."

Apple Is Not The Most Valuable Company In The History Of The World — IBM Won The Prize In 1967 With A Value of $1.3 Trillion | TechCrunch