Based on YC's directory, there are approximately 13,000 YC founders since YC started.
105/13000 is a very small number to focus on. This data doesn't really mean anything.
What if out of 13000 there are no other cases where close to 100+ worked at the same company
Right, at this point its ~150 person cohorts, 4x a year. 105 is a drop in the bucket.
To reframe the silliness of this analysis, ~1% of the study population is Sam Altman founding OpenAI.
What I find more interesting is how many people have left big orgs where they had major leadership roles, to become ICs at Anthropic.