---
title: "65 Series B Cybersecurity Investors (Nov 2026)"
last_updated: "2026-11-09"
rows: "65"
free_rows: "25"
source: "SEC Form D filings and our own research"
canonical: "https://theinvestordatabase.com/lists/series-b-cybersecurity-investors/"
---

# 65 Series B cybersecurity investors

We list 65 Series B cybersecurity investors as of November 2026: 35 have an SEC filing on file and 30 were checked on the firm's own website or an official register, and the list was last checked on 9 Nov 2026. The states with the most are California (10), New York (7) and Florida (4).

- 65 investors
- 42 with a fund filing or dated deal in the last 12 months
- $200M median fund size on file (SEC Form D, 28 firms)
- 359 named decision-makers on file

## First 25 of 65 Series B cybersecurity investors

| Investor | Type | HQ | Stages (our research) | Focus (our research) | Latest fund or deal | Fund size | Checked | Profile |
|---|---|---|---|---|---|---|---|---|
| Alpha Partners | VC firm | New York, NY | Series B, Growth | Cybersecurity, AI, Developer Tools, Healthtech | New fund, Oct 2026 | $200M (SEC Form D, 2024) | 2026-11-04 | https://theinvestordatabase.com/investors/alpha-partners/ |
| DTCP | VC firm | Hamburg, Germany | Series A, Series B, Growth | Cybersecurity, SaaS, AI, Defense Tech | New fund, Sep 2026 | €3.5B (own site) | 2026-11-07 | https://theinvestordatabase.com/investors/digital-transformation-capital-partners-s-a-r-l/ |
| eCAPITAL | VC firm | Münster, Germany | Seed, Series A, Series B | Cybersecurity, Deep Tech, Climate Tech, AI | Portfolio news, Sep 2026 | €400M (own site) | 2026-11-07 | https://theinvestordatabase.com/investors/ecapital-entrepreneurial-partners-ag/ |
| Endeit Capital | VC firm | Amsterdam, Netherlands | Series A, Series B, Growth | Cybersecurity, Fintech, Climate Tech, AI | New deal, Oct 2026 | €430M (own site) | 2026-11-07 | https://theinvestordatabase.com/investors/endeit-capital-b-v/ |
| Energy Impact Partners | VC firm | United States (London office) | Seed, Series A, Series B, Growth | Cybersecurity, Energy, Climate Tech, AI | Portfolio news, Nov 2026 | $4.5B (own site) | 2026-11-05 | https://theinvestordatabase.com/investors/energy-impact-partners/ |
| Evolution | VC firm | New York, NY | Seed, Series A, Series B, Growth | Cybersecurity, AI, Developer Tools, SaaS | New fund, Sep 2026 | $1.2B (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/evolution/ |
| Tribe Capital | VC firm | San Mateo, CA | Seed, Series A, Series B, Growth | Cybersecurity, AI, Crypto and Web3, Generalist | New fund, Oct 2026 | $500M (SEC Form D, 2021) | 2026-11-04 | https://theinvestordatabase.com/investors/tribe-capital/ |
| Kibo Ventures | VC firm | Spain | Seed, Series A, Series B | Cybersecurity, Generalist, SaaS, Healthtech | New fund, Oct 2026 | €500M (own site) | 2026-11-07 | https://theinvestordatabase.com/investors/kibo-ventures-partners-sgeic-s-a/ |
| Menlo Ventures | VC firm | Menlo Park, CA | Pre-seed, Seed, Series A, Series B, Growth | Cybersecurity, AI, Media, Robotics | New fund, Sep 2026 | $800M (SEC Form D, 2025) | 2026-11-04 | https://theinvestordatabase.com/investors/menlo-ventures/ |
| SYN Ventures | VC firm | West Palm Beach, FL | Seed, Series A, Series B | Cybersecurity, AI, Defense Tech, Industrial Tech | New fund, Oct 2026 | $300M (SEC Form D, 2022) | 2026-11-04 | https://theinvestordatabase.com/investors/syn-ventures/ |
| Translink Capital | VC firm | Palo Alto, CA | Seed, Series A, Series B | Cybersecurity, AI, Developer Tools, Mobility | New fund, Sep 2026 | $174M (SEC Form D, 2021) | 2026-11-05 | https://theinvestordatabase.com/investors/translink-capital/ |
| Axeleo Capital | VC firm | Paris, France | Pre-seed, Seed, Series A, Series B | Cybersecurity, SaaS, B2B, AI | Portfolio news, Oct 2026 | €300M (own site) | 2026-11-07 | https://theinvestordatabase.com/investors/axeleo-capital-sas/ |
| MiddleGame Ventures | VC firm | Luxembourg, Luxembourg | Pre-seed, Seed, Series A, Series B | Cybersecurity, Fintech, AI, Deep Tech | New deal, Sep 2026 | €300M (own site) | 2026-11-07 | https://theinvestordatabase.com/investors/middlegame-ventures/ |
| Madrona | VC firm | Seattle, WA | Pre-seed, Seed, Series A, Series B, Growth | Cybersecurity, AI, Biotech, Consumer | New deal, Oct 2026 | $490M (SEC Form D, 2025) | 2026-11-05 | https://theinvestordatabase.com/investors/madrona/ |
| C4 Ventures | VC firm | France | Seed, Series A, Series B | Cybersecurity, Deep Tech, AI, Robotics | Portfolio news, Sep 2026 | €90M (own site) | 2026-11-07 | https://theinvestordatabase.com/investors/c4-ventures-management/ |
| Dallas Venture Capital I DVC | VC firm | Irving, TX | Seed, Series A, Series B | Cybersecurity, AI, Fintech, Data | New deal, Oct 2026 | $75M (SEC Form D, 2021) | 2026-11-05 | https://theinvestordatabase.com/investors/dallas-venture-capital-i-dvc/ |
| Variant | VC firm | New York, NY | Pre-seed, Seed, Series A, Series B, Growth | Cybersecurity, Fintech, AI, Crypto and Web3 | New fund, Sep 2026 | $250M (SEC Form D, 2025) | 2026-11-04 | https://theinvestordatabase.com/investors/variant/ |
| Atlas Ventures | VC firm | Chicago, IL | Seed, Series A, Series B | Cybersecurity, Logistics, AI, Industrial Tech | New fund, Sep 2026 | $23M (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/atlas-ventures/ |
| SaaS Ventures | VC firm | Coral Gables, FL | Pre-seed, Seed, Series A, Series B, Growth | Cybersecurity, B2B, AI, SaaS | New fund, Sep 2026 | $50M (SEC Form D, 2021) | 2026-11-04 | https://theinvestordatabase.com/investors/saas-ventures/ |
| Ansa | VC firm | New York, NY | Series A, Series B, Growth | Cybersecurity, AI, Healthtech, Media | New fund, May 2026 | $200M (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/ansa/ |
| SignalFire | VC firm | San Francisco, CA | Seed, Series A, Series B, Growth | Cybersecurity, AI, Healthtech, Developer Tools | New fund, May 2026 | $357M (SEC Form D, 2021) | 2026-11-04 | https://theinvestordatabase.com/investors/signalfire/ |
| Westly Capital Partners | VC firm | Menlo Park, CA | Pre-seed, Seed, Series A, Series B, Growth | Cybersecurity, AI, Energy, Industrial Tech | New fund, May 2026 | $500M (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/westly-capital-partners/ |
| Theory Ventures | VC firm | Portola Valley, CA | Pre-seed, Seed, Series A, Series B | Cybersecurity, AI, Data, Developer Tools | New deal, Jul 2026 | $450M (SEC Form D, 2024) | 2026-11-05 | https://theinvestordatabase.com/investors/theory-ventures/ |
| FLF Accelerate | VC firm | Tampa, FL | Pre-seed, Seed, Series A, Series B | Cybersecurity, AI, Fintech, Media | New fund, Sep 2026 | $5M (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/flf-accelerate/ |
| Orange Ventures | Corporate VC | France | Seed, Series B, Growth | Cybersecurity, AI, SaaS, B2B | New deal, Sep 2026 |  | 2026-11-09 | https://theinvestordatabase.com/investors/orange-ventures-sas/ |

You are seeing 25 of 65. The full list adds 40 more investors and 359 named decision-makers.

Get all 65 investors and 359 named contacts, $49, one-time: https://theinvestordatabase.com/buy/list/series-b-cybersecurity-investors
This page: https://theinvestordatabase.com/lists/series-b-cybersecurity-investors/

## Method and limits
- Source: 35 of the 65 rows carry an SEC filing (Form D or Form ADV). All 65 have a website we checked. Filing date and fund size are SEC data where a filing exists. Stage, sector and check size are our research.
- Inclusion rule: Organizations that back startups. Individuals, buyout funds and firms we found to be inactive are left out. Sector: the firm states cybersecurity as a focus on its own site, or we observed it in the firm's portfolio. Stage: the firm states that it invests at Series B.
- Order: Activity score out of 100: recency of the latest fund filing or dated deal (35: full marks within 3 months, then stepping down at 6, 12 and 24 months), share of the observed portfolio in this sector (25; half of that when the sector is stated only), stage focus (15: all of it when Series B is the only stage the firm states, split evenly when it states more), size of the fund on file on a log scale (15) and completeness of the public record (10). Stage focus is our research, not an SEC figure. It is a measure of activity and fit, not of quality or returns.
- Fill rates: Of 65 rows: stage 65, sector 65, fund size 46, website 65. In the paid file: named decision-makers on 62 rows, firm email on 21, LinkedIn page on 45, check size on 18.

## Questions
### How many Series B cybersecurity investors are there?
We list 65 as of November 2026. 42 of the 65 have a fund filing or a dated deal in the last 12 months.

### Which Series B cybersecurity investors raised a new fund in the last 12 months?
22 of the 65 have a fund filing dated in the last 12 months. The most recent on this list are Bessemer Venture Partners (Oct 2026), Alpha Partners (Oct 2026) and SYN Ventures (Oct 2026).

### What is the typical fund size of Series B cybersecurity investors?
The median fund size on file for this list is $200M, across the 28 firms with a size on an SEC Form D. The fund on file is each firm's main fund, which is not always its newest. The other 37 do not disclose a size there.

### How do I contact Series B cybersecurity investors?
The paid file holds 359 named decision-makers across 62 of these 65 and a firm email for 21. We publish the address a firm lists itself, never a personal email. Each free row links to a profile with the firm's website.

### Where does the data on Series B cybersecurity investors come from?
35 of the 65 rows have an SEC filing on file (Form D or Form ADV) and 30 were checked on the firm's own website or an official register. Filing date and fund size come from the filing. Stage, sector and check size are our research. Rows on this list were last checked on 9 Nov 2026 at the latest. The whole file is re-verified twice a year.