Ann: Small Holding Sale Facility, page-10

So it was close of trade on 17 April - if I buy 35,713 shares in a SMSF tomorrow I'm all good ?

It seems completely nonsensical to me tbh.   For example I've been known to dip my toe into a share (and as @fooca rightly points out this dip may have been higher than 1.5k for some peeps when it was being pumped trading higher) because I'm a lazy cow and it was easier to track movement and see announcements in my portfolio for something I have somewhat of an interest in.   These are people that at some point (at least) had GPP on their radar and then by deduction, if what @JackMR said was true (of course I don't believe a word of it) could be potential larger stakeholders should the share actually progress. Oh wait ... maybe that is the point, they never will be?