$ALRM is one of biggest losers #stocks today. read more:

Alarm.com Holdings, Inc. (symbol: ALRM) was one of the worst losers of the
trading day today (2016-06-21), losing -6.75%. The number of shares that
changed hands was 388,228, or about 2 times the average daily volume in the
stock.
The closing price was $23.35, amounting to a market cap of $1,060,000,000,
about -7.82% off the highest price in the last 12 months. The stock has
been trading at a range between $10.26 and $25.33.
ALRM is in the n/a industry, part of the n/a sector.