ThreatLocker Raises $190M Series F to Expand AI Security Globally

Cybersecurity company using a Zero Trust architecture, ThreatLocker, has closed a $190 million Series F funding round that ranks among some of the biggest cybersecurity raises of 2026 and highlights growing investor interest in denying by default security in light of increasing adoption of AI (PR Newswire).

Founded in 2013 and based in Orlando, Florida, ThreatLocker made the announcement about closing this round on July 29, 2026. The round was led by venture capital firm Elephant, joined by current investors D. E. Shaw Ventures and Arthur Ventures. Notable news here is the participation in the round by Koch Disruptive Technologies (KDT), a venture investing unit of Koch Industries – one of the largest privately held corporations in the world, with revenues exceeding $125 billion and operations in over 50 countries.

What ThreatLocker Does

As a reminder for those who aren’t familiar with this field, ThreatLocker sells a Zero Trust security platform. Instead of the traditional detect and respond approach that tries to find suspicious activity in your network, ThreatLocker takes a more proactive approach, allowing only pre-approved software, devices, and users into a system. This kind of security strategy is more strict than the conventional approach, used by most legacy antivirus and endpoint security solutions.

ThreatLocker claims to protect over 70,000 organizations around the world and has appeared in the Inc. 5000 list of fastest growing American private companies for two consecutive years. That seems to play a major part in securing this funding round.

Where the Funding Will Go

According to the company, the $190 million will go into the following areas:

1. Development of security controls related to AI, i.e., making sure that AI agents and their code don’t break security in your network.
2. Development of ThreatLocker’s existing Zero Trust Platform, making sure it works in endpoints, networks, and cloud infrastructure.
3. International expansion of ThreatLocker, including a launch of a new office in Reading, UK, to strengthen their position in the UK and Europe.

This new office is the latest step in a rapid internationalization process. During the last year and a half, ThreatLocker opened offices in Brisbane and Dubai in addition to the ones in Orlando and Dublin.

The AI Angle is the Key to Understanding This Move

What really sets this round apart from others is the focus on AI security. Speaking of this round, ThreatLocker’s CEO and cofounder Danny Jenkins argues that most cybersecurity solutions are reactive and wait until something bad gets into a network. He stresses that the more pressing need is to prevent things that shouldn’t be there from accessing sensitive resources.

That vision is clearly reflected in the product roadmap of the company. ThreatLocker’s Allowlisting tool is supposed to prevent execution of unapproved AI tools and AI generated code in the first place. The Ringfencing™ technology is even more useful in preventing access, modification and interaction of approved applications and AI agents. ThreatLocker also developed some additional controls to make sure that employees’ activities with AI websites don’t result in leaks of sensitive information.

These features complement ThreatLocker’s recently introduced products of Zero Trust Network Access and Zero Trust Cloud Access that implement the allow by exception principle in networks and cloud infrastructure, all this is managed via a single dashboard. In other words, ThreatLocker positions itself not only as an endpoint security solution, but as a full stack Zero Trust platform designed specially for the AI era.

What the Investors Have to Say

Jeremiah Daly, a partner of Elephant, explains that the firm decided to invest again because of the execution and product leadership of ThreatLocker. He believes that the company is well prepared to serve the increasing demand for prevention based security.

Emerson James of KDT shares similar thoughts, saying that the firm was impressed by ThreatLocker’s dedication to its vision and is planning to use Koch’s partnership network, industry experience, and Koch Labs® in order to help ThreatLocker to grow further.

BofA Securities was the exclusive placement agent for this deal, while Latham & Watkins LLP served as legal counsel for ThreatLocker. These facts suggest that this is an institutionally oriented fundraising round rather than a startup style funding round.

Why This Matters Beyond ThreatLocker

A Series F stage is usually associated with a company that has already found its product market fit and is now scaling aggressively with a plan to become publicly traded or be acquired. A $190 million raise at this stage, along with the participation of such an investor as Koch Disruptive Technologies, indicates a high level of confidence in the long term prospects of Zero Trust and specifically AI focused security as a non optional category.

From the perspective of enterprises and IT teams that pay attention to the evolution of AI security solutions, the international growth of ThreatLocker should be paid attention to. As autonomous AI agents gain access to company resources, the tools to control what AI can do inside the system are going to be more and more important.

TheTweaks Verdict

ThreatLocker’s Series F funding of $190 million is not exciting news like a new fundraising of a consumer tech company would be, but it is still an important signal for anyone who follows the trends in enterprise security. The idea behind this funding is quite simple: with the increase in autonomy of AI agents inside company systems, the  allow by default security will look increasingly reckless, and deny by default solutions like ThreatLocker’s platform are going to win.

The number of Koch Disruptive Technologies, which are not a typical growth stage VC, but rather a serious, patient capital fund, lends credibility to the number. In tandem with their current 70,000+ customers and back to back number one ranking on the Inc. 5000 list, and an increasingly global presence, this isn’t a bet on the hype around the new AI craze, but more of a doubling down on a proven idea.