Highest operating margin (%) among #stocks $SPX $SPY 1.  TEXAS PACIFIC LAND T. $TPL: 74.6 2.  CREDIT ACCEPTANCE CO. $CACC: 70.8 3.  VISA INC. $V: 66.8 4.  EQM MIDSTREAM PANE. $EQM: 66.1 5.  VERISIGN, INC. $VRSN: 65.6 United States United States United States United States United States