The summer is off to a strong start in Indianapolis, with office space leased and recorded by quarter-end totaling around 280,000 square feet, a 10-month high. One large lease was key to the surge, a 125,000-square-foot sublease signed in Carmel by CNO Financial Group at 11299 Illinois St. The sublease had a triple net asking rent of $27 per square foot. The firm will occupy the new headquarters space later this year.