GJ 3512 is a cool M-dwarf (about 0.12 solar masses, 3,141 K, 0.14 solar radii), 9.5 light-years from Earth. GJ 3512 b is a 0.46-Jupiter-mass companion, with an orbital period of 203 days, at 0.338 AU from its star, on an eccentric orbit (e ≈ 0.43), discovered in 2019 via radial velocity. GJ 3512 c is a 0.45-Jupiter-mass companion, with an orbital period of 6.44 years, at 1.731 AU from its star, on an eccentric orbit (e ≈ 0.09), discovered in 2020 via radial velocity.