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Cybersecurity

Security software and platforms.

Cybersecurity keeps growing whatever the IT budget does — breaches, ransomware and cloud migration make it non-discretionary. This collection covers software platforms and specialists across endpoint, network, cloud, identity and vulnerability management.

21 stocksSorted by market capUpdated 7 Oct 2026

Why it matters

Security software and platforms. Technology themes move quickly, so the best use is to separate real revenue exposure from broad market excitement.

What to check next

Look for clear product demand, customer concentration, margins, reinvestment needs and whether the company has pricing power in the theme.

Main risk

Fast narratives can outrun fundamentals; competition, capex cycles and valuation compression matter even when the long-term theme is real.

Company Market Market Cap Reward Risk Yield
Palo Alto Networks IncPANW$329.9B6156—
Crowdstrike Holdings IncCRWD$276.5B5572—
Fortinet IncFTNT$132.8B7345—
Cloudflare IncNET$124.3B6364—
Okta IncOKTA$37.0B7756—
Zscaler IncZS$32.1B5863—
F5 Networks IncFFIV$25.7B6845—
Rubrik, Inc.RBRK$24.4B7372—
CyberArk Software LtdCYBR$20.6B5544—
Akamai Technologies IncAKAM$15.7B5048—
Check Point Software Technologies LtdCHKP$13.3B5345—
Gen Digital Inc.GEN$13.2B63572.3%
SailPoint, Inc. Common StockSAIL$11.7B6259—
SentinelOne IncS$8.7B7356—
Qualys IncQLYS$6.7B7756—
Varonis SystemsVRNS$5.5B6067—
Tenable Holdings IncTENB$4.1B5766—
Rapid7 IncRPD$821.6M6772—
GB Group plcGBG£331.1M43583.0%
Arqit Quantum Inc.ARQQ$428.4M4674—
NCC Group plcNCC£225.4M61453.2%

Frequently asked questions

What is the Cybersecurity collection?

Security software and platforms. It currently holds 21 stocks, each rated by Openbook's Reward and Risk scores. Cybersecurity keeps growing whatever the IT budget does — breaches, ransomware and cloud migration make it non-discretionary.

How are Cybersecurity stocks selected?

Cybersecurity is a curated basket of companies with direct exposure to this theme, screened against live market data and ranked by market capitalisation.

How often is the Cybersecurity list updated?

Prices, ratings and rankings rebuild from live market data every time the page loads. The membership of the basket itself is reviewed and revised by hand on a regular cadence, so newly-listed or no-longer-relevant companies are added and removed as the theme moves.

How should I use the Reward and Risk ratings?

Openbook's Reward rating combines a stock's growth, momentum, profitability and valuation into a single 0–100 score, and the Risk rating scores financial strength, volatility and size. Use them to compare names within this theme — broadly, a higher Reward alongside a lower Risk is more attractive. They are quantitative research signals, not investment advice.

Openbook Reward and Risk ratings and factor scores are quantitative signals for research, not investment advice. Data may be delayed. Some US-listed names carry partial factor coverage.