Fermilab Accelerator Science and Technology (FAST) facility has completed the construction of high-energy linac beamline. In my talk, we will discuss the recent electron beam experiments and first results. In particular, I will describe the generation of a CAM dominated electron beam and Round-to-Flat beam transformation. Preliminary results of measuring CAM beam properties will be shown. Additionally, I will present a short summary of transversely modulated beams study.