Urwin originally pleaded not guilty and appeared in court with Petricevic, Roest and Steigrad, but changed his plea in November last year and is awaiting sentencing in April.
Despite the alleged link, Barcroft was listed as an 'unrelated company' in the section of Bridgecorp's prospectus about 'related-party transactions'.
The Crown argues this statement is untrue.
This morning Steigrad's lawyer Brian Keene questioned Graham over definitions of 'related company' and suggested Barcroft could not be classified as such under Bridgecorp's trust deed.
But during the discussion Graham said regardless of whether the word 'company' or 'party' was specifically used, the term 'unrelated' would have been the most important one for readers of the prospectus.
"The word unrelated has a very distinct meaning to 99 per cent of readers," Graham said.
"Whether you substitute related 'party' or 'company' the nuances of that will be lost (on) 99 per cent of readers. What won't be lost to them is the word 'related' or 'unrelated'," he said.
"I'm suggesting that this is word-smithing and the issue is that Barcroft is a related party...when you strip everything else aside the word 'related' is an important word for readers of financial statements."
As well as the Securities Act counts, Petricevic and Roest face eight charges of knowingly making false statements in offer documents that Bridgecorp had never missed interest payments to investors, or repayments of principal.
The directors deny all charges against them in a trial expect to run until March.
Bridgecorp collapsed in July 2007 owing around 14,500 investors $459 million.