Am I correct in assuming it must be one of the top 10...

Am I correct in assuming it must be one of the top 10 shareholders? OR can a stock broker accumulate shares from a range of clients and sell in one hit.....

Twenty Largest Shareholders (from 2009 annual report)
The names of the twenty largest shareholders are as follows: No. of Shares
1. Suparell Pty Ltd 23,262,626
2. National Nominees Limited 23,075,000
3. Lehmann Group 17,274,777
4. Martinick Group 12,921,828
5. Mr Brian Lesleigh Williams & Mrs Ruby Valerie Dawn Williams 12,000,000
6. Ossart Holdings Pty Ltd 11,000,000
7. Woods Group 8,313,202
8. Sydney Equities Pty Ltd 7,300,000
9. Mr Darren Roberts 7,042,889
10. Hosking Group 5,977,537
11. Mrs Maria Varoli 3,900,000