Suffolk cybersecurity firm Sera-Brynn remains in the Cybersecurity 500’s top position in the state and 13th in the U.S. — as well as No. 16 in the world — on the strength of its continued fast growth.

Sera-Brynn is tops among 41 Virginia cybersecurity firms listed in the Cybersecurity 500 fourth-quarter list of the hottest and most innovative cybersecurity firms in the world. The list was released this week.

Trailing Sera-Brynn in the top 100 of the list are Northrop Grumman, the next-highest ranked Virginia company at No. 54, L-3 at No. 55 and LookingGlass at No. 76.

Other notable firms listed include the Herjavec Group — founded by “Shark Tank” entrepreneur Robert Herjavec — at No. 23, Deloitte at No. 27, Cisco at No. 31, Symantec at No. 51 and Booz Allen Hamilton at No. 98.

The Cybersecurity 500 list is developed by Cybersecurity Ventures, based in Menlo Park, Calif. The firm is a research and market intelligence company focused on startup and emerging companies, as well as major players, in the cybersecurity industry.

“We continue to have triple-digit growth for a reason,” Sera-Brynn Chief Executive Officer Rob Hegedus said. “We have successfully demonstrated the use of specialized loss-control services to mitigate emergent cyber risk exposure to the insurance industry, the healthcare sector and other specific verticals.”

Hegedus said Sera-Brynn employs a cyber-HMO model that focuses on a high-touch methodology. “In other words, we focus on preventative measures instead of reacting to catastrophic losses,” he said.

Steve Morgan, founder and CEO at Cybersecurity Ventures, and editor-in-chief of the Cybersecurity 500, said that the selection criteria for the Cybersecurity 500 list includes feedback from chief information security officers, the problems solved by the cybersecurity firm, company growth, notable implementations, and interviews with senior management.

“We continuously look at thousands of companies for inclusion in the Cybersecurity 500 by soliciting feedback from CISOs, IT security practitioners and service providers, and researching hundreds of cybersecurity events and news sources that we follow,” Morgan said.

“We do not think a list of the largest cybersecurity companies is useful to our target audience of cyber and IT security decision makers, evaluators and recommenders,” Morgan said. “They already know who the biggest vendors are. Instead, we give a nod to the hottest and most innovative companies.”