Rebalancing due to takeover rumors

I did a bit of rebalancing at the start of the year and sold 25% of my position. I still think Trend Micro is a superbly positioned company, but an almost 30% rise in the share price within a week was enough to bag a few profits. The reason for the rise were takeover rumors, if they prove to be true I will probably get out in the long term anyway, if not I could imagine a more significant setback.