Once the share distribution is announced/rolled ou

Once the share distribution is announced/rolled out, it will be the same for all shareholders: from one day long to years long. If you are looking to take in some profit, I suggest you do some from your later buys (depending on what you're okay with for taxes) because your earliest buys will have much more exponential potential in the day, months and years to come. On the flip side of course, those might be the ones that have the amount of profit you're looking to take. It will really come down to what you're looking to take out, but whichever you decide, you shouldn't be concerned with how it will impact your future Cen shares outside of the obvious (selling before spin off will be less % of Cen received).

Of course, all in my opinion.