Financial consultant Vaughn Stephen Foster and lawyer Timothy Upton Slack had earlier pleaded guilty to obtaining by deception.
They were each sentenced to 10 months' home detention.
Ross and Wehipeihana will be sentenced later this year.
The now-defunct company Emily Projects developed the Celestion Apartments on Auckland's Anzac Ave and Emily Place.
The group made false statements and used forged documents to get a loan from ANZ for Emily Projects to develop the Waldorf Celestion Apartment Hotel.
A loan facility of about $41m was obtained for the two-tower project.
ANZ did not lose any funds as a result of the fraud.
SFO director Julie Read said in a statement after the verdicts: "Mr Ross and Mr Wehipeihana misled the bank to ensure that Emily Projects Limited obtained the loan facility. The SFO is committed to investigating and prosecuting this kind of offending to maintain the integrity of the mortgage market for the benefit of honest borrowers."
Emily Projects went into liquidation in 2012 and its liquidators, Timothy Downes and Greg Sherriff, said in their final liquidators report in October 2015 that investors had claimed $2.89m from the firm and two other creditors had claimed $671,000.
These creditors had been paid $420,310, a return of 11.8c in the dollar.