"We have got plans in place and that's what has attracted shareholders - not just News Corp," he said.
Murdoch's New Corp last week declared that it had picked up 14.9 per cent of APN after a block share sale form Ireland's' Independent News Media (INM) and a related party, Baycliffe, having earlier bought just under 5 per cent.
Official disclosures as to who bought the rest of the 30.8 per cent sake put for sale by the Irish investors have have not yet been made, but Australian media said a number of other institutional investors were rumoured to have bought into the company including Perpetual, Colonial First State, Perennial Investment Partners and Regal Funds Management.
Miller said the departure of the Irish removed a "perceived shadow" over the company rather than a real one.
He said the once debt-laden INM and Baycliffe had had not acted as a "handbrake" on APN but that their departure would help add liquidity for the stock.
"If you go back 12 months about 50 per cent of the company was held by three shareholders - Alan Gray and two other shareholders, who were related.
"There was a lack of liquidity in the stock and that was a distraction for some funds who wanted to have a meaningful position in APN," he said.
"By INM and Baycliffe selling out, and by Allan Gray reducing its stake to 15 per cent, you have now got a lot more liquidity in the stock," he said.
Last December, APN was included in the ASX200 index, which will give the company exposure to index-based funds.
APN's dual listed shares last traded in New Zealand at $1.05.