HIP 54373 is an orange K-type dwarf (about 0.57 solar masses, 4,021 K), 18.7 light-years from Earth. HIP 54373 b is a 8.6-Earth-mass planet, with an orbital period of 7.8 days, at 0.063 AU from its star, on an eccentric orbit (e ≈ 0.20), discovered in 2019 via radial velocity. HIP 54373 c is a 12.4-Earth-mass planet, with an orbital period of 15.1 days, at 0.099 AU from its star, on an eccentric orbit (e ≈ 0.20), discovered in 2019 via radial velocity. Mutual gravitational tugs between the planets can slowly reshape their orbits, preserving clues to the system's assembly.