American Tower is trading 6.75% higher in pre-market at $176.73 on September 30, with the catalyst still unclear. - It closed at $167.35 on September 29, according to the supplied price context. - The previously announced $1.79 quarterly dividend has an ex-dividend date of September 30, but does not explain the sharp rise. - No clear overnight company-specific announcement was found. Major U.S. indices are near flat or slightly lower pre-market, so broad-market strength is not an evident driver.