Exoplanet population with a minimum mass measurement m sin i. Panel a: sub-population with large orbital periods (P > 50 days). This sample contains 665 exoplanets. Top: histogram of that population, with respect to the planet minimum mass. The vertical grey and green lines identify the position of HD 99492 c and HD 147379 b, respectively. Bottom: proportion of planets that are part of multi-planet systems, among the considered sub-population. Panel b: Sub-population with small orbital periods (P < 50 days, 389 exoplanets). Top: distribution of that subpopulation according to m sin i (in orange). The red histogram indicates companions to the low-mass long-period planets (red zone in panel a). The grey histogram focuses on companions to the large-mass long-period planets (grey zone in panel a). Bottom: Proportion of planets part of multi-planet systems.