Here’s a histogram of ages at founding for some hand-picked (founder, company) pairs:
I made a list of companies I thought were in some way interesting or impressive:
0 Viaweb 1 Netscape 2 Microsoft 3 Apple 4 Amazon 5 Facebook 6 Stripe 7 Paypal 8 SpaceX 9 Airbnb 10 Google 11 Alibaba 12 Tencent 13 Netflix 14 Oracle 15 IBM 16 Baidu 17 Uber 18 Palantir 19 Anduril 20 Oculus 21 Instagram 22 Twitter 23 Lyft 24 Intel 25 Walmart 26 Samsung 27 Disney 28 Boeing 29 Ford 30 Standard Oil Company 31 General Electric 32 Fairchild Semiconductor 33 Tesla
For each of these companies, I went to Wikipedia and looked up:
I only kept those where Wikipedia provided the relevant data (this is also a good time to point out that Wikipedia dates of birth can have a significant margin of error, up to a year!).
This gave me a table of 76 (name, date of birth, company, company date of founding) tuples. The difference between the date of company founding and birth gives the age at founding for each (founder, company) pair. These differences are histogrammed above in bins of five years.
Note that some people show up more than once, having founded more than one company on the list! Musk, for instance, makes a triple appearance, for Paypal, SpaceX, and Tesla.
The min and max ages were 19.5 years and 61.5 years old: Bill Gates and Sherman Fairchild, respectively. The mean and median were both about 30.
Alexey Guzey prompted me to post this.