Sorry, I couldn't find pricing data for that day. The closing price for Costco Wholesale (COST) on September 30, 1994 was $5.37. It was up 1.2% for the day. The latest price is $977.89.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
September 30 1994
$5.30
$5.51
$5.30
$5.37
3,613,000
Daily pricing data for Costco Wholesale dates back to 11/27/1985, and may be incomplete.