In a public big tech company your ownership is immaterial in terms of your influence on the direction of the company.
Presumably in a smaller private company with 100% insider ownership, it could be arranged that employees have more influence. For example, the employees could vote on board seats or raise and discuss issues at a General Meeting of the company’s shareholders.
This would presumably not be the case in VC-funded startups where the founders and VCs would choose the board and retain the lion’s share of equity and all nominal control.
In practice, in most companies that are not agency-style partnerships the insider ownership doesn’t really matter in terms of influence from what I’ve seen. In agency partnerships there is a dual class issue of partners and regular employees.
A private company with a BDFL who retains 50% + 1 control but has the minority stake dispersed among the rest of the employees seems like an interesting approach. The “B” comes into play in how the majority owner supports decision making. The “D” acts as a forcing function and guardrail to limit the effect of internal politics.