No one transferred directly. There might be some people from OLD Nokia working in HMD, but basically HMD started from scratch
"All the best designers and engineers of the former Nokia mobile business either moved to Microsoft when the latter took over or quit to pursue independent projects and startups of their own. The name’s still the same, but the expertise is gone. HMD’s executives are talking a good game about "the best designers in the world ... lining up" to join the company’s ranks, but they’ll all be starting from scratch. HMD may retain the Nokia cachet, however it lacks the scale of the old company and so there’s no chance of securing early or exclusive access to hot new tech or materials."http://www.theverge.com/2016/12/6/13852802/nokia-android-sma...
"All the best designers and engineers of the former Nokia mobile business either moved to Microsoft when the latter took over or quit to pursue independent projects and startups of their own. The name’s still the same, but the expertise is gone. HMD’s executives are talking a good game about "the best designers in the world ... lining up" to join the company’s ranks, but they’ll all be starting from scratch. HMD may retain the Nokia cachet, however it lacks the scale of the old company and so there’s no chance of securing early or exclusive access to hot new tech or materials." http://www.theverge.com/2016/12/6/13852802/nokia-android-sma...