Probably because it was run by mathematicians who I assume have no love for managing lots of people.

Combine that with how most the company spend all their time thinking about making money and that's probably why the company never succumbed to bloat

The incentives at rentec favor low employee counts. The main fund is both limited to insiders and limited in total capital, so every new hire is judged by how much they can improve returns, if they cost more than they improve, than they're a pure net negative.

This is different from most orgs who can grow revenue through expansion of some sort, in which case the incentive often favors adding new employees. Not to mention the tendency for people in tech to be evaluated by how many people are in their org, further incentivizing adding headcount to signify your importance.

That's one thing I find interesting about hedge funds and (some, not all) finance organizations: their ability to make huge amounts of money with small staffs. IIRC RenTech's revenue per employee is something entirely absurd, in the millions.

From Wikipedia: “Employees: Classified (est. 30,000–40,000)”

Obviously the number of people working on the super secret stuff is smaller, not to mentioned each project has a compartmentalized staff, but keeping secrets at this size is going to be a tough ask. They seem to do a pretty good job, but we know they’re not infallible at it. I imagine RenTech at 1/100th the size would have a vastly easier time.

There are leaks.