Non-founders rarely, if ever, are given that much equity (commonly cited numbers tend to top out around 2%). The most likely candidates are engineer #1 and an early VP, but engineer #1 has likely been diluted by over 30% since seed stage and even the exec will have been diluted by 10~20%.
At $5BB, a nonfounder needs about 0.6% of the company. By this point though, dilution is usually even more severe, and engineer #1 will likely have had his/her initial share cut by close to 50%. This means that only the earliest of early employees, along with the VP level hires, will have $30MM at a typical $5BB startup (though $5BB startups are hardly typical).
It's the companies that are another order of magnitude higher in valuation that mint wealth of that kind to dozens of employees.
[1] ignoring liquidity preference for the sake of simplicity.