The Philadelphia Business Journal reports a major leadership change at the Cira Centre-based Leadnomics: cofounder and CEO Zach Robbins has stepped down as the lead-gen company works to tweak its model.

The shift involves some mystery products being rolled out over the coming months, the company said in a blog post last September. But it also brought about some other news: last month Leadnomics moved from the 8,000-square-foot office it occupied at 3020 Market St. to a smaller space in the Cira Centre that also houses cofounder Stephen Gill’s other enterprise: Red Spark. (Red Spark appears to be the parent company of Gill’s 50onRed and a handful of other adtech brands.)

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