Event management software maker Certain has taken $17.8 million in funding, according to a regulatory filing with the SEC.

In addition to the company’s founders, the Form D also names wealth management exec Morton Pactor.

Certain was founded in 1994 and is based in San Francisco. Previously, the company took an $11 million round of private equity financing in 2011.

Certain Software makes tools for planning, promoting, managing, and tracking all aspects of an event. The company claims it reaches millions of event attendees in 50 countries around the world.

A few months ago, the company acquired Check In Easy, a mobile app for event attendee tracking.