Looks like Tribeca had more TAW shares that weren't converted to A40 since last sub holder notice.
Last notice, the conversion date was 5 Dec (~72.4m shares, 5.59%). https://www.asx.com.au/asxpdf/20181207/pdf/4411s57qn889pz.pdf
Merger Record Date was 7 Dec. So suggest that Tribeca bought more TAW shares on the last few trading days (T+2)? ~6.4m more TAW shares?