The closing price for Interactive Brokers (IBKR) on December 31, 2018 was $13.25. It was up 2.7% for the day (up 2.6% from previous close). The latest price is $68.96.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
December 31 2018
$12.90
$13.25
$12.80
$13.25
2,242,812
Daily pricing data for Interactive Brokers dates back to 5/4/2007, and may be incomplete.