Fdc ltd

Hi,

After I knew that FDC is the company producing Electral ORS, I was eager to invest and started searching for more details in web and in Value Pick, stumbled upon this thread
After going through the thread and contribution by members, felt this would be the right forum to clarify and may be helpful for others following FDC :-))
I was going through the FY16-17 FDC annual report.
Shareholding pattern between current year and last year shows that 15% is transferred to a promoter trust in year fy16-17. (Page 27)
What does it imply? What triggers a promoter to transfer to a trust?

Thanks,
Muthu