Sorry, I couldn't find pricing data for that day. The closing price for Tesla (TSLA) on August 11, 2017 was $23.86. It was up 0.3% for the day. The latest price is $435.88.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
August 11 2017
$23.80
$24.08
$23.57
$23.86
65,486,812
Daily pricing data for Tesla dates back to 6/29/2010, and may be incomplete.