Looks like its Bryan Johnson that's been feeding the sell side this week going by SPH notice filed.
Interesting to note his holding is now under 5% threshold and he's still got another 6mln odd shares under his disposal. Any more sales from him doesn't need to be reported to NZX. Will he continue to sell down or hold for a while.
My bet is he'll continue to sell down further.
https://www.nzx.com/announcements/336070