We also used OCaml at Bloomberg quite a bit. (And they are still using it, but I'm not there anymore.)

But there's not that much more in the commercial OCaml world.

Haskell has actually a bit of a broader adoption. The open source library situation is also better.

(For the record, I like both OCaml and Haskell. And Janestreet are doing a great job.

And commercial and open source adoption are important. But they are not the end to every discussion.)