According to filings with the U.S. Securities and Exchange Commission, Horizon3 has raised $250 Million in new Series E funding. The federal securities law requires the notice to be filed by companies that have sold securities without registration under the Securities Act of 1933 in an offering made under Rule 504 or 506 of Regulation D or Section 4(a)(5) of the Securities Act. A company must file this notice within 15 days after the first sale of securities in the offering. For this purpose, the date of first sale is the date on which the first investor is irrevocably contractually committed to invest. Each issuer of securities that sells its securities in reliance on an exemption provided in Regulation D or Section 4(a)(5) of the Securities Act of 1933 must file this notice containing the information requested with the U.S. Securities and Exchange Commission (SEC) and with the state(s) requiring it. If more than one issuer has sold its securities in the same transaction, all issuers should be identified in this filing with the SEC.

Investors in the company’s current round of funding include: NightDragon, and NEA

About Horizon3
Horizon3, the AI-Native Proactive Security Company behind NodeZero, shifts the advantage from attackers to defenders by giving organizations the power to fight AI with AI. NodeZero, the World’s Best AI Hacker, autonomously tests defenses at machine speed, safely uncovers and prioritizes exploitable attack paths, instantly verifies fixes, and drives a continuous hack, fix, verify loop. More than 7,000 organizations, including global defense agencies, Fortune 10 enterprises, multinational banks, and major healthcare providers, trust Horizon3 for security they can prove. Horizon3 was recently named the Fastest Growing Cybersecurity Company in North America by the Deloitte Technology Fast 500 and named one of the Most Innovative companies by Fast Company in 2026.

To learn more, visit https://www.horizon3.ai/
Linkedin: https://www.linkedin.com/company/horizon3ai/

Contact:
Snehal Antani, Chief Executive Officer
https://www.linkedin.com/in/snehalantani/

SOURCE: http://www.intelligence360.io
Copyright (c) 2026 SI360 Inc. All rights reserved.