Chain walking copolymerization of ethylene with 1,4‐butanediol diacrylate at elevated concentrations for the synthesis of low‐viscosity hyperbranched polyethylenes tethered with a controllable amount of acryloyl functionality is reported. At concentrations much higher than the critical gelation concentrations, the diacrylate comonomer is copolymerized predominantly following the mono‐insertion pattern. A range of hyperbranched polyethylenes tethered with acryloyl functionality (1.3–4.8 mol‐%) and having low melt viscosity (ca. 25 Pa?·?s at 25?°C) and low glass transition temperature (Tg?=??69?°C) has been synthesized. This unique method is specific to the Pd‐diimine‐catalyzed chain‐walking copolymerization system.