Three new signings at H.J. Kalikow’s 101 Park Ave. totaling 77,400 square feet have brought the tower at East 40th Street near Grand Central Terminal to 98% leased. In something of a coup, Peter Kalikow and his Cushman & Wakefield leasing team of John Cefaly and Nicholas Dysenchuk snared a former One Vanderbilt tenant — Cipher Digital, which took the entire top floor’s 26,400 square feet for its relocated headquarters. Kalikow said, “The top floor of 101 Park is a very special place with expansive views in an efficient, column-free environment.” Meanwhile, wealth-management firm Corient expanded by  24,600 square feet, bringing its footprint in the tower to nearly 100,000 sf. And law firm Sills Cummis & Gross took 26,400  for a relocation within the building. We don’t know what Gary Barnett has in mind for the former Friars Club building at 57 East 55th St., which his Extell Development Corp. bought for $19 million, the Commercial Observer reported on Friday.…