Ansys, an innovator of engineering simulation software, completed the acquisition of Rocky, an engineering simulation and scientific software, from ESSS, a software company. Financial terms were not disclosed. "Rocky's unique approach to discrete particle modeling empowers our customers to solve a wide variety of problems across virtually all industries. Fully integrating Rocky into Ansys' portfolio and welcoming its distinguished experts to our team builds upon our demonstrated success and enables Ansys to provide an even more efficient and powerful solution for our customers. We are delighted to welcome Rocky into the Ansys family," Shane Emswiler, Ansys Senior Vice President of Products.