Arm

Laid back, good atmosphere, lots of smart people

Salaries are not good enough for Cambridge (just have a look at rents/property costs), not very nice offices, ARM is cheap (on everything! but getting better), there's no much wiggle space your promotion is solely in hands of your manager if he doesn't care or doesn't like you, you are stuck, no clear and transparent rules or process on getting promotion.

Internal procedures are very much corpo in quite small company (if you consider divisions/groups are basically separate entities they are couple hundreds people).

Take a bigger care of your employees, not only say that they are important just do something about it. They are all ARM has.