GJ 367 is a cool M-dwarf (about 0.46 solar masses, 3,522 K, 0.46 solar radii), 9.4 light-years from Earth. GJ 367 b is an ultra-short-period planet denser than Earth, likely an exposed iron-rich core on an eight-hour orbit. GJ 367 b is a 0.5-Earth-mass planet, with an orbital period of 7.7 hours, and an equilibrium temperature near 1,329 K, discovered in 2021 via transit. GJ 367 c is a 4.1-Earth-mass planet, with an orbital period of 11.5 days, on an eccentric orbit (e ≈ 0.09), discovered in 2023 via radial velocity. GJ 367 d is a 6.0-Earth-mass planet, with an orbital period of 34.4 days, on an eccentric orbit (e ≈ 0.14), discovered in 2023 via radial velocity.