Three months of negotiations followed, during which the couple raised their offer twice.
"I have not discussed with anyone inside or outside the company about raising our offer," he said.
The Giants seem sure to be ready to raise their offer.
In February, the company raised its offer to $26 a share.
Paramount had raised its offer on Friday from $175 a share.
He declined to say whether the group would raise its offer.
The company raised its offer for the property to $760 million on Monday.
The factor had been a little too eager to raise his offer.
In a recent round of talks, Western raised its offer from $31 share.
Last week the company raised its offer to $2.5 billion, which the Williams board did not accept.