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Halcyon

Halcyon is a cybersecurity company specializing in anti-ransomware solutions, featuring pre-execution detection, behavioral modeling, and resilient recovery mechanisms.

Secondary Market Price

Updated: 
Jan 2026
Current Preferred Price
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Current FMV
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Company Valuation
Updated: 
Jan 2026
Industry
Austin, TX
Headquarters
2021
Year Founded
400+
Employee Count

Secondary Market Price

Updated: 
Jan 2026
Current Preferred Price
Date:
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Prospect Projected Preferred
Current FMV
Date:
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Prospect Projected FMV
--
Company Valuation
Updated: 
Jan 2026
Industry
Austin, TX
Headquarters
2021
Year Founded
400+
Employee Count

How Halcyon Measures Up

To help you manage your Halcyon equity, Prospect has run the company through our machine learning model.

Prospect Rating

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This rating reflects our belief in this company's potential to grow to that many times its current value in 4 years. For an employee with stock, this rating suggests a potential return on equity, but it also comes with some risk.

Exit Risk

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Our rating is a reflection of the likelihood of this company achieving a liquidity event for its employees based on the quality of investors, funding stage, founders, and more.

Funding Stage

Series C

A company’s funding stage reflects how established it is, how quickly it is scaling, and the average impact an employee may have when joining.

Est val --
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Jan 6, 2026

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Prospect Projected Future Halcyon Prices

Prospect’s machine learning model has been trained on the same data top-tier investors use to project the likely range of outcomes for Halcyon's equity. Create a free account to view 10th-90th percentile projections over 2, 4, and 6 years.

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Company Description

Halcyon is a cybersecurity company founded in 2021 that specializes in anti-ransomware technology. The company's primary offering is the Halcyon Anti-Ransomware and Cyber Resilience Platform, an endpoint agent that uses multiple prevention engines and AI models to disrupt ransomware attacks. The platform is designed to work at various stages of an attack, from pre-execution detection to preventing data exfiltration and encryption. Halcyon provides 24/7 support and a ransomware warranty alongside its platform. Since its founding, the venture-backed company has grown to a staff of between 201 and 500 employees and is actively building partnerships with technology providers, Managed Security Service Providers (MSSPs), and Value-Added Resellers (VARs).

Looking forward, Halcyon is focused on expansion and research. The company recently launched the Halcyon Ransomware Research Center (RRC) and established a Federal Practice to support public sector clients, appointing several new executives to lead these and other strategic initiatives. In December 2024, Halcyon closed a $100 million Series C funding round with investors that included Cisco Investments and Evolution Equity Partners. Future plans include developing support for additional operating systems beyond its current Windows compatibility, expanding its geographic presence, and growing its partner programs. The company has received recognition from industry publications such as Inc. Magazine, Fortune, and SC Media.

Halcyon Notable Investors

  • SYN Ventures
  • Dell Technologies Capital
  • Corner Ventures
  • Evolution Equity Partners
  • Bain Capital Ventures
  • Harmony Group
  • Corner Capital Management
  • Dropbox Ventures
  • ServiceNow Ventures

Halcyon Founders

  • Co-Founder, Jon Miller
  • Co-Founder, Ryan Smith

Peer Group Comparison

Vs Peer Group of >$4B Startups

Frequently Asked Questions

Is Anduril worth joining?

Joining Anduril as an employee is another way to acquire equity, typically through stock options included in compensation packages.

Is Halcyon worth joining?

Deciding whether to join any startup depends on your personal career goals and your assessment of the company's long-term potential. To make an informed decision, it's crucial to understand the value of the equity compensation being offered.

What should I do with my Halcyon stock?

Managing private company stock involves complex decisions around when to exercise options, how to plan for taxes, and when to sell. Platforms like Prospect can help you create a personalized strategy to optimize the value of your equity.

Can you sell Halcyon stock?

As Halcyon is a private company, you can typically sell shares only during specific events like a tender offer, a secondary sale, or after an IPO. Tools designed for private equity can help you navigate these opportunities and determine which shares are most tax-optimal to sell.

How can I find the value of my Halcyon stock?

The value of private stock is typically determined by the company's most recent 409A valuation, which is used for tax purposes. To better understand its future potential, you can use platforms with predictive models that forecast your equity's value under different scenarios.

What is Halcyon's equity worth?

A private company's total equity worth is based on its latest valuation, which can fluctuate with new funding rounds and business performance. Specialized tools can help you model how different company outcomes might affect the net value of your personal holdings.

What is Halcyon's stock ticker symbol?

Since Halcyon is a private company, it does not have a stock ticker symbol. Ticker symbols are only assigned to companies when they become publicly traded on a stock exchange.

Can I buy or sell Halcyon stock?

Selling private stock is generally possible during company-approved liquidity events, while buying shares is typically restricted to employees exercising options or accredited investors in funding rounds. Managing the sale of your shares requires careful tax and financial planning.

What is the criteria to buy or invest in Halcyon stock?

Investing in a private company is usually limited to institutional investors, accredited investors, and employees who receive equity as part of their compensation. Financial platforms for startup equity are designed to help employees manage the stock they already own, rather than facilitate new investments.

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