Find People Limits: Strategies for Large Company Lists

Hey! Question on Find People limits. I’m running Find People on a large list of ~4,000 US companies (all with $100M+ raised). For the titles I’m searching, I set it to return up to 5 people per company, so I’d expect something closer to ~20K contacts. However, the result set capped out at under ~4,000 people, 5 for some companies and zero for most. Is there a limit or throttling when running Find People against a large company list? And if so, would you recommend breaking the 4,000 companies into smaller groups and running the search across multiple tables to avoid the cap?