Trending: Week in Review: Most popular stories on GeekWire for the week of April 14, 2019

A new analysis from IPO Dashboards shows just how challenging it was to take a company public in 2011. The report shows that the average initial public offering closed down more than nine percent during the year, with 71 of the 119 companies that went public finishing the year “underwater” (below their offering prices).

The top 10 tech IPOs for 2011. Zillow is not included, since it is listed in real estate, a category that it led.

“Some of this is a result of the tumultuous market conditions we’ve seen this year, but it’s also hard not to question the long-term viability of some companies–especially the ones trading more than 50 percent down from their offer prices, many of which are tech companies,” notes Tableau Software’s Daniel Hom, who authors the IPO Dashboards blog.

One bright spot was Seattle-based Zillow, the Seattle online real estate company which saw its stock increase 12.4 percent. While an exception in the real estate category, Hom points out the company has shows signs of struggle recently.

The top performing IPO of the year was Imperva, a data security company based in Redwood Shores, California. Its stock was up 93 percent from the IPO. LinkedIn also performed well, up 40 percent. The worst performer was Renren, the Chinese social networking site that was down 75 percent on the year.

Overall, the tech category — which started off the year with a bang — saw offerings down by 18.4 percent. Only the materials, business services and consumer categories saw positive results.

Here’s the interactive information from IPO Dashboards.

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