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 data management expert CommVault Systems (Nasdaq: CVLT) look smart today, rising as much as 11.7% on heavy trading volume.

So what: Fourth-quarter sales vaulted 22% year-over-year to $90 million along with stronger margins, which added up to an analyst-stumping bottom-line performance. The stock has now gained 88% over the last year.

Now what: CommVault is holding its own against much larger rivals EMC (NYSE: EMC) and Symantec (Nasdaq: SYMC). Management claims to be taking market share from the incumbent powers and plans to keep doing it, too. CommVault's solutions appeal to large-scale enterprises in particular, as giant orders made up the bulk of this quarter's outperformance.

Interested in more info on CommVault Systems? Add it to your watchlist.

Fool contributor Anders Bylund holds no position in any of the companies discussed here. The Fool owns shares of EMC. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool is investors writing for investors.