We present confirmation of the planetary nature of PH-2b, as well as the first mass estimates for the two planets in the Kepler-103 system. PH-2b and Kepler-103c are both long-period and transiting, a sparsely-populated category of exoplanet. We use {\it Kepler} light-curve data to estimate a radius, and then use HARPS-N radial velocities to determine the semi-amplitude of the stellar reflex motion and, hence, the planet mass. For PH-2b we recover a 3.5-$\sigma$ mass estimate of $Mp=109-32+30$ M$\oplus$ and a radius of $Rp=9.49\pm 0.16$ R$\oplus$. This means that PH-2b has a Saturn-like bulk density and is the only planet of this type with an orbital period $P>200$ days that orbits a single star. We find that Kepler-103b has a mass of $Mp,b=11.7-4.72+4.31$ M$\mathrm{<mrow\; data-mjx-texclass="ORD">\oplus </mrow>}$ and Kepler-103c has a mass of $Mp,c=58.5-11.4+11.2$ M$\mathrm{<mrow\; data-mjx-texclass="ORD">\oplus </mrow>}$. These are 2.5$\sigma$ and 5$\sigma$ results, respectively. With radii of $Rp,b=3.49-0.05+0.06$ R$\oplus$, and $Rp,c=5.45-0.17+0.18$ R$\oplus$, these results suggest that Kepler-103b has a Neptune-like density, while Kepler-103c is one of the highest density planets with a period $P>100$ days. By providing high-precision estimates for the masses of the long-period, intermediate-mass planets PH-2b and Kepler-103c, we increase the sample of long-period planets with known masses and radii, which will improve our understanding of the mass-radius relation across the full range of exoplanet masses and radii.