The EDA world gets even smaller today with the acquisition of CLKDA. The CLK are the founders initials by the way, the DA is design automation. The CEO is Isadore Katz (the K). Founded in 2005, backed by Atlas Ventures and Morgenthaler, they are headquartered in Littleton, MA just outside Boston. The purchase price will probably not be disclosed but from what I have heard it was between $5-6M.
We did a history of blog two years ago in case you are interested:
A Brief History of CLKDA: Every Picosecond Counts Below 28nm
CLKDA raised about $10M but has had a difficult time scaling their business. From what I have heard their revenue was less than $2M last year and they were out of cash.
To me this was a strategic acquisition for ANSYS. Not only do they get some nice technology but they get a very experienced group of 10 digital design people that can be leveraged.
About CLK Design Automation
CLK Design Automation is the market and technology leader in timing variation analysis and high accuracy timing solutions for nanometer semiconductor designs. FX is the first transistor model and simulator specifically engineered for digital variance and delay analysis. FX is in production at the most advanced IC geometries at 20nm, 16nm, 14nm, and 10nm with all of the leading foundries.