This page contains information regarding Star Trek: Discovery, and thus may contain spoilers.
At the Mercantile on Hima and an exchange visited by Michael Burnham, the regulators guarded the marketplace. At the salvage yard on Hunhau, the regulators performed the role of prison guards over slave laborers.
At the Mercantile on Hima, the regulators confirmed the transfer of payment from holobuyer to holoseller to the Orions who ran the marketplace. Several regulators assisted Ossyra in capturing the USS Discovery near the Verubin Nebula. The Regulators were able take control of Discovery and force Stamets to take Ossyra to Federation Headquarters.(DIS: "That Hope Is You, Part 1", "People of Earth", "Scavengers"; DIS: "Su'Kal")