Last month the architect confirmed to the AJ that it was in pivotal discussions with other Eye stakeholders, potentially to reconsider its involvement with the high-profile South Bank tourist attraction.
However, the architect has now closed ranks by refusing to comment after speculation emerged this week that it might wish to definitively cease its financial involvement with the project.
David Marks and Julia Barfield are currently in talks with the Tussauds Group, the other owner of the landmark.
Observers have speculated that Marks Barfield's stake in the Eye could be worth as much as £10 million.
The move comes after months of wrangling between the South Bank Centre landowner and the London Eye operators over proposed rent increases for the Eye.
The Tussauds Group bought former stakeholder British Airways' financial interest in the Eye last year for £95 million.