After taking a week off, the IPO market roared to life last week with a hot tech debut that more than doubled and even a fast-growing maker of stylish luggage and travel accessories.

Let's take a closer look at the companies that went public last week.

Company

IPO

April 20, 2012

Gain

Splunk (Nasdaq: SPLK) $17 $36.20 113%
Infoblox (NYSE: BLOX) $16 $21.30 33%
Proofpoint (Nasdaq: PFPT) $13 $14.08 8%
Tumi Holdings (NYSE: TUMI) $18 $26.20 46%
Midstates Petroleum (NYSE: MPO) $13 $15.00 15%

Source: Dealogic.

The belle of the ball was obviously Splunk.

The market leader in "big data" -- a booming niche where companies can mine information -- more than doubled last week, though Splunk was one of the few tech stocks to lose ground during yesterday's market surge.

Splunk has more than 3,700 customers around the world that use Splunk's ability to record every action made on their servers to get to know their customers better. From thwarting cybersecurity to figuring out why customers are abandoning their loaded shopping carts, Splunk has to be doing something right given its heady growth.

Infoblox is a network automation provider with 5,400 enterprise customers. Proofpoint provides cloud-based cybersecurity solutions. Proofpoint also mines big data for potential vulnerabilities, though it's not the pure play that investors are getting in Splunk.

Tumi is a fast-growing company for premium luggage and travel accessories. This may not seem like a booming business -- especially at a time when the travel industry is still meandering -- but Tumi sales soared 31% last year after climbing 29% higher the year before.

Midstates Petroleum rounds out the list as a Houston-based oil and gas explorer.

All five of these stocks pulled off strong debuts last week, though Midstates Petroleum is the only one that has continued to pad those gains through the first three trading days of this week.

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