Cybereason may have only moved into its new Boston headquarters last fall, but with 110 employees locally now, the cybersecurity startup is already busting at the seams on the 21st floor of the John Hancock Building and plans to move to a new floor next year.

With a $100 million funding round from SoftBank in July, Cybereason is the Japanese tech giant’s top funded cybersecurity startup to date, according to CrunchBase data. SoftBank, which began its relationship with Cybereason as a customer, previously led the company’s $59 million funding round in fall 2015. Cybereason’s total funding is now at $189 million.

Cybereason’s endpoint detection and response software finds threats by looking for anomalies in the transfer of metadata within a companies network. As previously reported by BostInno, the company’s annual revenue, which grew 500 percent last year, is in the tens of millions, thanks to more than 250 customers, which includes Vizio, Flowserve and Lockheed Martin, the latter of which has also invested in Cybereason.

“SoftBank tested a number of cybersecurity products from all over the world, but Cybereason’s products are by far better than those of their competitors,” Ken Miyauchi, president and CEO of SoftBank, said in a previous statement.

SoftBank Invests $100M in Cybereason as ‘Cyber Cold War’ Engulfs the World

While Cybereason didn’t provide specific local hiring plans, the company said it plans to grow from its current headcount of 300 to 325 by the end of the year. That number is expected to reach 500 by the end of 2018.

The company’s rapid growth — its employee base is 200 percent larger than last year — has already made its 15,000-square-foot Boston office significantly cozy, with one of the company’s conference rooms being turned into more office space. To make more room for continued growth, the company has signed a lease for the entire 18th floor of the John Hancock Building, doubling its current footprint to 30,000 square feet.

Cybereason’s open office-style headquarters in Boston provides employees with a sweeping view of Boston’s Back Bay, Cambridge and other surrounding areas. With the kind of amenities people have come to expect at startups, like cold brew coffee on tap and foosball tables, Cybereason also has employee engagement programs like Flight School, a two-day onboarding program for new recruits, and UbU, which aims to promote workforce diversity.