Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of Constant Contact (CTCT.DL) have popped today by upwards of 19% after the company reported first-quarter earnings.

So what: Revenue in the first quarter totaled $68.2 million, which was only a hair above the consensus estimates for the top line. On the bright side, the online marketer surprised investors with non-GAAP earnings per share of $0.05, which topped the $0.03 per-share loss that the market was expecting. The company also raised its guidance for 2013.

Now what: The increased forecast calls for better profitability on an unchanged sales outlook. Revenue for 2013 should still be in the range of $284 million to $289 million, but non-GAAP earnings per share is expected at $0.14 to $0.17, up from the previous guidance of $0.62 to $0.69 per share. CEO Gail Goodman said the company continues to transition into a multi-product company, and that Constant Contact has seen success converting demand to paying customers.

Interested in more info on Constant Contact? Add it to your watchlist by clicking here.