It was a good week for IPO stocks, both performance wise and media attention wise. Roku (ROKU  ) stole the show with its 68% gain on its first day of trade which caused the media to focus on it's success. Pricing at the high end of the range, investors gobbled up the offering and the company was successful in raising the $219 million. All but one of last weeks offerings traded positively both on their first days as well as their first week.

This week we have three offerings looking for $670 million in total. There is a tech company that will be looking for $469 million which makes it the largest technology offering since Snap, Inc. (SNAP  ). There is also a biotech and a blank check company.

Switch (SWCH  ) is based in Las Vegas and provides co-location services through their 3 campuses. According to their filing their main branch is over 2 million square feet and is almost completely occupied. The company is looking for $469 million so they can expand into other areas like Atlanta, GA and Reno, NV. They will offer 31.25 million shares at a range of $14 - 16. Some analysts have raised concern over this company due to their insider dividends and dual class share structure that has become popular among tech companies.

Rhythm Pharmaceuticals (RYTM  ) is a biotech that is focused on "ultra-rare" forms of genetic obesity. It's leading drug at the moment is an injectible appetite regulator that has reported strong results in phase 2 trials.They will offer 6.66 million shares at a range of $14 - 16 in hopes of raising $100 million for their phase 3 trials.

Black Ridge Acquisition (BRACU  ) is a blank check company looking for $100 million. The company is focused on acquisitions in the energy space and, according to their filing will be hyper focused on the upstream oil and gas area. At the helm is Kenneth DeCubellis who spend 10 years at Exxon Mobil (XOM  ). They will be offering 10 million shares at $10 a share.