Twitter has closed at $44.90 a share, 73 percent above its I.P.O. price. Still, the price was slightly below the day’s opening price of $45.10.

The stock experienced heavy trading volume during the day, with more than 110 million shares changing hands.

This concludes our live blog of Twitter’s market debut. For more coverage, check out  this story by David Gelles.

Thanks for reading!

— William Alden