Constraining the atmospheric composition of an exoplanet can potentially grant insight into its formation history, since the materials available to build a planet can depend on where, when, and how that planet forms. Here we explore the formation history of a young super-Jupiter discovered by direct imaging by measuring the atmospheric C/O ratios and metallicities of three planetary-mass objects. All three objects are in the beta Pic moving group, meaning they have similar ages and formation conditions. The objects also have comparable early L spectral types, and therefore similar masses. The main difference is that two of the three objects are free-floating and are likely to have formed from gravitational collapse, whereas the third is bound to a host star and has a formation history that is unknown. We use low-resolution (R~100) spectra for these three objects with the open-source atmospheric retrieval code petitRADTRANS, and explore whether the presence of clouds affect the retrieved abundances from the low-resolution spectra. Next we will obtain abundance constraints using high-resolution (R~25,000) spectra, and compare atmospheric compositions between the three objects. If the two isolated objects have similar compositions and the bound one does not, this could point to a difference in formation history for the bound companion. Further work will expand this pilot sample to a larger population of objects.