Quinary alloying of NiTi shape memory alloy (SMA) with Hf, Zr, and Cu has recently been demonstrated to increase the transformation temperatures, work output and strength levels through the high entropy and solid solution effects, rendering these alloys attractive for a plethora of applications. This study reports on the shape memory characteristics of Ni50-xCux (TiHfZr)50 (0 ≤ x = at.% Cu ≤ 25) high entropy SMAs with equal amounts of Ti, Hf and Zr to maximize the configurational entropy. All compositions display the single-step B2-B19’ martensitic transformation, with transformation temperatures reducing from 600C to 150C with increasing Cu content. In addition to the presence of oxygen stabilized Ti2Ni type precipitates in all solution heat treated compositions, aging and thermal cycling result in a complex microstructure with additional precipitate types. Identification of these precipitates as well as their effect on transformation behavior is part of ongoing work and will be presented.