Updated from 9:27 a.m.

Structural Dynamics Research


was up 37.8% in late morning after computer services provider

Electronic Data Systems


said late Wednesday it would buy the business software maker for $950 million.

The cash deal values Structural Dynamics at $25 a share, vs. its closing price Wednesday of $17.61. Also today, EDS said it was offering $170 million, or $27 a share, for the publicly traded shares of its

Unigraphics Solutions



Shares of Unigraphics were up 32.6%. EDS was down 5.8%.