Sorry, I couldn't find pricing data for that day. The closing price for Regeneron Pharmaceuticals (REGN) on December 31, 1999 was $12.70. It was up 3% for the day. The latest price is $576.71.
| DATE | OPEN | HIGH | LOW | CLOSE | VOLUME |
|---|---|---|---|---|---|
December 31 1999 | $12.32 | $12.94 | $12.20 | $12.70 | 51,500 |
Daily pricing data for Regeneron Pharmaceuticals dates back to 4/2/1991, and may be incomplete.
