Melissa Smith, president and CEO of Wex, Inc., right, gives a tour through an office area at the company's new headquarters on the Portland waterfront during an opening celebration on Friday, March 8, 2019.

Melissa Smith, president and CEO of Wex, Inc., right, gives a tour through the office space of the company's new headquarters on the Portland during an opening celebration on Friday, March 8, 2019. Included in the tour group at left are Sen. Susan Collins and Gov. Janet Mills.

Mike Dubyak, executive chairman of the Wex Inc. board, shows his Wex shirt while making comments at an opening celebration of the company's headquarters on the Portland waterfront on Friday, March 8, 2019.

In the lobby of the new headquarters of Wex Inc. on the Portland waterfront, Gov. Janet Mills, Melissa Smith, president and CEO of Wex and Sen. Susan Collins pose for a photo during an opening celebration for the building on Friday, March 8, 2019.

Participating in a ribbon cutting in the lobby of the new headquarters of Wex Inc. on the Portland waterfront are, from left, Jonathan Cohen, developer, Gov. Janet Mills, Melissa Smith, president and CEO of Wex, Inc., Sen. Susan Collins, Mike Dubyak, executive chairman of the Wex board and Justin Costa, Portland City Councilor, during an opening celebration of the building on Friday, March 8, 2019.

Exterior of the new headquarters of Wex Inc. on the Portland waterfront. The company held an opening celebration on Friday, March 8, 2019 for the building where 400 employees will work.

Melissa Smith, president and CEO of Wex, Inc. delivers opening remarks in the lobby of the company's new headquarters on the Portland waterfront during an opening celebration on Friday, March 8, 2019.

Melissa Smith, president and CEO of Wex, Inc. shows people the boardroom on the fourth floor of the company's new global headquarters on the Portland waterfront during an opening celebration on Friday, March 8, 2019.

Gov. Janet Mills, Sen. Susan Collins and Melissa Smith, president and CEO of Wex, Inc. take in the view from the fourth floor of the new global headquarters of Wex Inc. during the company's opening celebration on Friday, March 8, 2019.

The kitchen and dining area in the new headquarters of Wex Inc. on the Portland waterfront. The company held an opening celebration on Friday, March 8, 2019 for the building that where 400 employees will work.

Melissa Smith, right, president and CEO of Wex, Inc. gives a tour of the company's global headquarters on the Portland waterfront to Sen. Susan Collins and Gov. Janet Mills on Friday, March 8, 2019.