Congratulations to the 33 K1 portfolio companies named to the 2026 Inc. 5000 list of America's fastest-growing private companies. This list belongs to the founders and teams behind these companies...
30 K1 portfolio companies have once again been named to the 2025 Inc. 5000 list
30 K1 portfolio companies have been named to the 2024 Inc. 5000 list.
28 portfolio companies that made the 2023 Inc. 5000
24 of our portfolio companies were just named to the Inc. 5000.
Rethink First, one of the pioneers in behavioral health technology, announced today that it has acquired Total Therapy (previously known as Total ABA), a leading provider of practice management software solutions serving the ABA, speech, occupational, and physical therapy markets.
Rethink Ed, a division of Rethink First, announced today that it has signed a definitive agreement to acquire Vizzle, a K-12 web-based platform with ready-to-use lessons and activities that personalize to each student user while automatically collecting crucial student learning data.
Rethink First, the parent organization of Rethink Benefits and a pioneer and market leader in behavioral and mental health technology, announced today it has acquired Whil, a leading digital provider of mindfulness, stress resilience, mental well-being and sustainable performance solutions.
Rethink First, the leading provider of cloud-based software solutions, assessments, and clinical best practice content for supporting individuals with autism and other developmental disabilities, today announced it has received a strategic investment from K1 Investment Management, LLC, a leading investment firm focusing on high-growth enterprise software companies.
