Last year saw the merger of  New York-based Seamless and Chicago-based GrubHub Inc (NYSE:GRUB); the largest online food-ordering service now serves roughly 600 cities and saw revenue in excess of $100 million in 2012. The company announced yesterday that rather than the expected 7 million shares at $23 to $25,  Grubhub would offer 7.4 million shares at $26 to raise over $192 million Despite this, the stock opened the day at $40 before quickly falling to its low-point of $35.50. It has since rebounded a bit and is trading up 39.45% at $36.29 as of this writing (1:18 PM EDT) with a volume of just over 8.5 million shares traded.

GrubHub

GrubHub Inc (GRUB):

“GrubHub Inc (NYSE:GRUB) fits this pattern of very successful IPOs that operate in a niche industry, linked to the U.S. consumer and technology,” Josef Schuster, founder of Chicago-based IPOX Schuster LLC, said by phone. “They benefit from risk appetite being so strong in the stock market and from the positive momentum.”

IMS Health Holdings (IMS):

The 60-year-old company which makes its money selling data on prescription drug use to both drugmakers and analysts saw its shares rise 11% in its trading debut, and IMS Health Holdings Inc (NYSE:IMS) and its investors managed to raise $1.3 billion after selling the stock for $20 a share. The stock opened the day at $22 before begin its assent to the $23 mark, it has since returned to $22.56 as of this writing. In the second biggest IPO of the year, the company has seen nearly 28 million shares trade hands and is presently up $12.83% from the $20 mark that the stock was offered to early investors.

JPMorgan Chase & Co. (NYSE:JPM), Goldman Sachs Group Inc (NYSE:GS) and Morgan Stanley (NYSE:MS) are managing the IMS Health Holdings Inc (NYSE:IMS) offering.

OPOWER (OPWR):

Arlington, Va.-based Opower Inc (NYSE:OPWR)  makes software that tracks energy usage in homes. It encourages homeowners to conserve by comparing their energy use to their neighbors’ and delivering home energy reports. In addition to homeowners, the company  sells its software to large utilities, serving more than 20 million customers in eight countries. Co-founder Alex Laskey delivered a highly watched TED Talk in February where he focused on conservation issues.

Last night, the stock was priced at the top of the expected range at $19 with Morgan Stanley (NYSE:MS) and Goldman Sachs Group Inc (NYSE:GS) taking the lead in the sale of 6.1 million shares. Before 10AM the stock peaked at $24.38 before falling markedly backwards to a low point of $22.05 at 12PM EDT. It has since rebounded and is trading at $23.03 up $4.03 or 21.21% as of this writing.