Fast-growing AvidXchange, which sells accounts payable and payment automation software, has raised $3.5 million in new financing.

The latest funding was disclosed in a securities filing on Tuesday.

It comes just a year after the company closed a whopping $225 million fundraiser.

In the latest filing, AvidXchange said two investors were involved with the offering. AvidXchange also said a sales commission of $210,000 is payable to an entity affiliated with Steve McLaughlin, a member of the company’s board of directors.

AvidXchange plans to open a new corporate headquarters in 2017.

The company’s chief executive officer has Michael Praeger said the new 200,000 square-foot, six story office building on Hamilton Street will house up to 1,000 employees, and the company plans to evaluate its space needs and assess a second, planned building on the site within a year.

As of May, the company employed almost 700, and had added 250 employees since January.

Getting AvidXchange to this point felt like a “15-year sprint,” Praeger said last year after the big fundraiser, noting that most successful software companies take decades to build. “It feels like a different company now with the capital available and who we’ve attracted, new board members who are luminaries.” He’s referring to the expertise from the investors who now hold board seats.

AvidXchange has spent a good part of the last 16 years since its founding in 2000, building its Payment Network, which connects to 120 accounting systems and continually adds more. The company has more than 250,000 vendors and 5,200 customers using the network.

Praeger has had an impressive career in the tech and venture capital sectors. He was Co-Founder of PlanetResume.com, a technology career enhancement and recruiting site that successfully completed its merger with CareerShop.com and CareerTV.net in November 1999.

Prior to that, he was Co-Founder and CEO of InfoLink Partners and InfoVentures. He also served as an Associate with Summit Partners, a Boston-based Venture Capital and Buyout partnership with more than $1 billion under management. He received a B.S.B.A. in Finance from Georgetown University. He a graduate of the “Birthing of Giants” executive entrepreneurship program at MIT.

Note: North Carolina Business News Wire, a service of UNC-Chapel Hill’s School of Media and Journalism, contributed to this report.