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18 Series B Cybersecurity investors

As of October 22, 2026, DryPowder lists 18 Series B Cybersecurity venture funds. Their median published check range is $750K–$12.5M (8 of 18 funds publish one). 1 has filed an SEC Form D in the last 90 days: 8VC (Oct 22, 2026).

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Which Series B Cybersecurity funds are writing checks right now?

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funds listed
18
median check (8 of 18 publish one)
$750K–$12.5M
filed an SEC Form D in the last 90 days
1
last updated, 2026
Oct 22

Filed a Form D in the last 90 days

Each date links to its SEC EDGAR filing

All 18 Series B Cybersecurity funds

  1. SignalFire
    San Francisco
    $500K–$5MSeedSeries ASeries B

    SignalFire is a VC firm built like a tech company that combines AI tools, data infrastructure, and deep sector expertise with portfolio support to…

    Partners not yet listed
  2. Menlo Ventures
    Menlo Park
    $500K–$5MSeedSeries ASeries BGrowth

    Menlo Ventures backs transformative technology companies at the intersection of AI, healthcare, and consumer by being operationally invested—doing…

    Partners not yet listed
  3. Notion Capital
    London
    $500K–$5MSeedSeries ASeries B

    Europe's leading early-stage business software investor, backing founders on the journey from $1M to $100M+ in revenue with deep software expertise…

    Partners not yet listed
  4. Costanoa Ventures
    San Francisco
    $1M–$5MSeries B

    Back a select few founders solving big, hard problems with long-term partnership support, leveraging decades of operational expertise and consistent…

    2 partners listed
  5. 8VC
    $5M–$50MSeries ASeries BGrowthFORM D

    We partner with leading entrepreneurs and innovators to build technology platforms that create lasting economic and societal value

    Partners not yet listed
  6. Sequoia Capital
    San Francisco
    $500K–$50MSeedSeries ASeries BSeries CGrowth

    Help the daring build legendary companies through capital, expertise, and network.

    18 partners listed
  7. Wing Venture Capital
    Palo Alto
    SeedSeries ASeries B

    Wing is an early-stage investor and long-term company builder equipping founders with resources and unwavering partnership to build products that…

    Partners not yet listed
  8. Balderton Capital
    London
    $1M–$20MSeedSeries ASeries B

    Build world-changing businesses with Europe's best founders over two decades. Support founders as complete people, not just CEOs, through deliberate…

    Partners not yet listed
  9. GV
    $1M–$100MSeedSeries ASeries BGrowth

    Invests in companies using technology to solve important problems in healthcare, artificial intelligence, cybersecurity, agriculture, transportation,…

    17 partners listed
  10. Axeleo Capital
    SeedSeries ASeries B

    Multi-strategy tech investment platform backing Europe's next leaders in Digital and Green transformation, providing Seed to Series B investments…

    Partners not yet listed
  11. Rally Ventures
    SeedSeries ASeries B

    Rally Ventures invests exclusively in early-stage business technology at the epicenter of B2B transformation, focusing on AI/ML, cybersecurity,…

    Partners not yet listed
  12. Pelion Venture Partners
    SeedSeries ASeries BSeries C

    Bringing visions of entrepreneurs and innovators to life through venture capital investment.

    Partners not yet listed
  13. Bain Capital Ventures
    San Francisco
    SeedSeries ASeries BGrowth

    Use tightly focused expertise and an unparalleled global network to help founders realize their potential across all stages, from incubation to…

    Partners not yet listed
  14. Daphni
    Paris
    SeedSeries ASeries BGrowth

    Daphni backs visionary entrepreneurs with deep conviction, supporting startups where vision meets conviction across diverse sectors.

    Partners not yet listed
  15. Icon Ventures
    SeedSeries ASeries B

    Icon Ventures applies 22 years of proven venture capital expertise to foundational AI companies across Seed through Series B, focusing on creating…

    Partners not yet listed
  16. PeakSpan Capital
    Series ASeries BSeries C

    Partner of choice for scale-ups defining what's next in Applied AI B2B software from $3M to $50M ARR and beyond, committed to protecting value,…

    Partners not yet listed
  17. XYZ Venture Capital
    SeedSeries ASeries B

    Early-stage companies need more than capital—they need partners with deep domain expertise and conviction to help them build functional, thriving…

    Partners not yet listed
  18. Alven Capital
    SeedSeries ASeries BSeries C

    Straightforward honesty is the best support a VC can bring to enable founders to react faster and execute with relentless focus.

    Partners not yet listed

How this list is built

DryPowder lists every fund with a public profile tagged Series B and Cybersecurity. Funds whose largest published check is $5M or less come first; inside each group, funds with a verified SEC Form D in the last 30 days lead, then profile quality decides. Form D dates come from SEC EDGAR, and SPV and single-deal filings are dropped. Check sizes are what each fund publishes; the median uses only the 8 funds that publish one.

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Frequently asked questions

How many Series B Cybersecurity VCs are there?

As of October 22, 2026, DryPowder lists 18 Series B Cybersecurity venture funds with a public profile. The first 5 on this page are SignalFire, Menlo Ventures, Notion Capital, Costanoa Ventures and 8VC.

Which Series B Cybersecurity VCs are actively investing right now?

1 of the 18 filed a verified SEC Form D in the last 90 days, a sign of a new fund being raised: 8VC (Oct 22, 2026). Each filing links to its record on SEC EDGAR.

What check size do Series B Cybersecurity VCs write?

The median published range is $750K–$12.5M, across the 8 of 18 funds that publish a check size. Published checks on this list run from $500K to $100M.

Where are Series B Cybersecurity VCs based?

Of the 18 Series B Cybersecurity venture funds, 4 are in San Francisco, 2 are in London, 1 is in Menlo Park and 1 is in Palo Alto. The rest are elsewhere or have no headquarters city on file.

How does DryPowder build this list?

A fund is listed when its public profile is tagged Series B and Cybersecurity. Funds whose largest published check is $5M or less come first; within each group, funds that filed a Form D in the last 30 days lead, then profile quality decides. Form D dates come from SEC EDGAR, with SPVs excluded. Data as of October 22, 2026.

Sources

Updated