There is at least one paying guest, and at least two OceanGate staff members according to https://news.sky.com/story/what-we-know-about-the-passengers-on-board-

There is at least one paying guest, and at least two OceanGate staff members according to https://news.sky.com/story/what-we-know-about-the-passengers-on-board-missing-titanic-submersible-12905596 https://news.sky.com/story/what-we-know-about-the-passengers.... (I've used the present tense out of optimism for a successful rescue)