A year ago its sales hit $229bn, with profits of $48.4bn, making it the most profitable listed USA company.
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One of three founders, Jobs was driven out of Apple in the mid-1980s, only to return a decade later and rescue the computer company from near bankruptcy.
Adjusting for four stock splits over the years, Apple debuted on the stock market for the equivalent of 39 cents a share on December 12, 1980, compared to Thursday's high of $207.05. "Given our confidence in Apple's future, we are very happy to announce that our Board has approved a new $100 billion share repurchase authorization and a 16 percent increase in our quarterly dividend", he added.
Actually PetroChina, a state owned oil giant, was the first company to hit this mark during its initial public offering in 2007, though its value has declined dramatically since then.
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Jobs, who founded Apple in a Silicon Valley garage in 1976 with Steve Wozniak and built it into a global powerhouse, died in October 2011.
The milestone also means that Apple is worth more than just about any country on the planet, there are only 16 that it is worth less than.
Naturally, the $1 trillion figure is constantly changing.
Whether or not Apple can retain this market cap - or close to it - in the long run remains to be seen.
Cook has put a focus on digital content and services, positioning Apple to make money from music, movies, apps, subscriptions and more - all sold to the vast "install base" of people using devices made by the company.
The gap is telling and I don't bring it up to ridicule Zim companies but just to show the difference between companies that we consider big and a company that has just reached a trillion dollar valuation.
While other tech stocks have struggled, Apple has soared ahead.