$TSLA Stock Split – Before Aug 17 you had to have shares in order to get the split. What happens if you buy more after the 17th?

So i bought 27 shares on Aug 16th as they stated that you needed to buy them before that date in order to get the split. You get the split on the 24th and it starts split trading on the 25th. If i wanted to buy more would those extra shares still be apart of the split? Appreciate any input thanks.