---
title: "165 Series B Investors in the US (Nov 2026): Top 10 Ranked"
last_updated: "2026-11-07"
rows: "165"
free_rows: "25"
source: "SEC Form D filings and our own research"
canonical: "https://theinvestordatabase.com/lists/series-b-investors-us/"
---

# 165 Series B investors in the US

We list 165 Series B investors in the US as of November 2026: 162 have an SEC filing on file and 3 were checked on the firm's own website or an official register, and the list was last checked on 7 Nov 2026. The cities with the most head offices on this list are New York (25), San Francisco (18) and Menlo Park (10).

- 165 investors
- 96 with a fund filing or dated deal in the last 12 months
- $102M median fund size on file (SEC Form D, 113 firms)
- 933 named decision-makers on file

## First 25 of 165 Series B investors in the US

| 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 | AI, Developer Tools, Healthtech, Cybersecurity | New fund, Oct 2026 | $200M (SEC Form D, 2024) | 2026-11-04 | https://theinvestordatabase.com/investors/alpha-partners/ |
| Energy Impact Partners | VC firm | United States (London office) | Seed, Series A, Series B, Growth | Energy, Climate Tech, AI, Cybersecurity | Portfolio news, Nov 2026 | $4.5B (own site) | 2026-11-05 | https://theinvestordatabase.com/investors/energy-impact-partners/ |
| Greycroft | VC firm | New York, NY | Series A, Series B, Growth | AI, Industrial Tech, Defense Tech, Healthtech | New deal, Oct 2026 | $600M (SEC Form D, 2022) | 2026-11-04 | https://theinvestordatabase.com/investors/greycroft/ |
| Kleiner Perkins | VC firm | Menlo Park, CA | Pre-seed, Seed, Series A, Series B, Growth | AI, Fintech, Proptech, Mobility | New fund, Aug 2026 | $995M (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/kleiner-perkins/ |
| Tribe Capital | VC firm | San Mateo, CA | Seed, Series A, Series B, Growth | AI, Cybersecurity, Crypto and Web3, Generalist | New fund, Oct 2026 | $500M (SEC Form D, 2021) | 2026-11-04 | https://theinvestordatabase.com/investors/tribe-capital/ |
| Madrona | VC firm | Seattle, WA | Pre-seed, Seed, Series A, Series B, Growth | AI, Biotech, Consumer, Deep Tech | New deal, Oct 2026 | $490M (SEC Form D, 2025) | 2026-11-05 | https://theinvestordatabase.com/investors/madrona/ |
| Translink Capital | VC firm | Palo Alto, CA | Seed, Series A, Series B | AI, Developer Tools, Mobility, B2B | New fund, Sep 2026 | $174M (SEC Form D, 2021) | 2026-11-05 | https://theinvestordatabase.com/investors/translink-capital/ |
| Bison Ventures | VC firm | San Francisco, CA | Pre-seed, Seed, Series A, Series B | AI, Healthtech, Energy, Biotech | New fund, Oct 2026 | $160M (SEC Form D, 2025) | 2026-11-04 | https://theinvestordatabase.com/investors/bison-ventures/ |
| 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/ |
| Geodesic | VC firm | Foster City, CA | Series B, Any stage | AI, Developer Tools, Fintech, B2B | New deal, Oct 2026 | $500M (SEC Form D, 2021) | 2026-11-05 | https://theinvestordatabase.com/investors/geodesic/ |
| Prudence. | VC firm | New York, NY | Series A, Series B | Proptech, AI, Robotics, Developer Tools | New fund, Aug 2026 | $150M (SEC Form D, 2022) | 2026-11-04 | https://theinvestordatabase.com/investors/prudence/ |
| Autotech Ventures | VC firm | Menlo Park, CA | Pre-seed, Seed, Series A, Series B | Mobility, AI, Logistics, Fintech | New fund, Aug 2026 | $25M (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/third-mind/ |
| Lightspeed Venture Partners | VC firm | Menlo Park, CA | Seed, Series A, Series B, Growth | AI, Healthtech, Gaming, SaaS | New fund, Jul 2026 | $1.2B (SEC Form D, 2024) | 2026-11-04 | https://theinvestordatabase.com/investors/lightspeed-venture-partners/ |
| Greylock | VC firm | San Francisco, CA | Seed, Series A, Series B, Growth | AI | New fund, Jun 2026 | $10.5B (SEC Form ADV) | 2026-11-05 | https://theinvestordatabase.com/investors/greylock/ |
| How Women Invest | VC firm | Oakland, CA | Pre-seed, Seed, Series A, Series B | Healthtech, AI, B2B, Climate Tech | New fund, Sep 2026 | $12M (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/how-women-invest/ |
| Ansa | VC firm | New York, NY | Series A, Series B, Growth | AI, Cybersecurity, 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 | AI, Healthtech, Developer Tools, B2B | New fund, May 2026 | $357M (SEC Form D, 2021) | 2026-11-04 | https://theinvestordatabase.com/investors/signalfire/ |
| G2 Venture Partners | VC firm | Portola Valley, CA | Series B, Growth | AI, Industrial Tech, Mobility, Energy | New deal, Aug 2026 | $53M (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/g2-venture-partners/ |
| FLF Accelerate | VC firm | Tampa, FL | Pre-seed, Seed, Series A, Series B | AI, Fintech, Media, B2B | New fund, Sep 2026 | $5M (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/flf-accelerate/ |
| True Beauty Ventures | VC firm | Palm Beach Gardens, FL | Seed, Series A, Series B | Consumer, Healthtech, CPG | New fund, Oct 2026 | $308M (SEC Form D, 2022) | 2026-11-04 | https://theinvestordatabase.com/investors/true-beauty-ventures/ |
| Menlo Ventures | VC firm | Menlo Park, CA | Pre-seed, Seed, Series A, Series B, Growth | AI, Media, Robotics, Consumer | 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/ |
| 500 Global | VC firm | Pleasant Hill, CA | Pre-seed, Seed, Series A, Series B, Growth | Generalist | New fund, Jul 2026 | $138M (SEC Form D, 2021) | 2026-11-05 | https://theinvestordatabase.com/investors/500-global-pleasant-hill/ |
| Massive VC | VC firm | Boulder, CO | Seed, Series A, Series B | Space, AI, Energy, Cybersecurity | New fund, May 2026 | $30M (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/massive-vc/ |
| 01A | VC firm | San Francisco, CA | Series A, Series B, Growth |  | New fund, Nov 2026 | $395M (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/01a/ |

You are seeing 25 of 165. The full list adds 140 more investors and 933 named decision-makers.

Get all 165 investors and 933 named contacts, $49, one-time: https://theinvestordatabase.com/buy/list/series-b-investors-us
This page: https://theinvestordatabase.com/lists/series-b-investors-us/

## Method and limits
- Source: 162 of the 165 rows carry an SEC filing (Form D or Form ADV). All 165 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. 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 (40: full marks within 3 months, then stepping down at 6, 12 and 24 months), stage focus (15: all of it when Series B is the only stage the firm states, split evenly when it states more), stated focus on the US (15: full marks when the firm names the US as where it invests, half when it says global), size of the fund on file on a log scale (20) and completeness of the public record (10). Stage and regional focus are our research, not an SEC figure. It is a measure of activity and fit, not of quality or returns.
- Fill rates: Of 165 rows: stage 165, sector 159, fund size 143, website 165. In the paid file: named decision-makers on 155 rows, firm email on 62, LinkedIn page on 98, check size on 17.

## Questions
### How many Series B investors in the US are there?
We list 165 as of November 2026. 96 of the 165 have a fund filing or a dated deal in the last 12 months. The cities with the most are New York (25), San Francisco (18) and Menlo Park (10).

### What is the typical fund size of Series B investors in the US?
The median fund size on file for this list is $102M, across the 113 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 52 do not disclose a size there.

### Which sectors do Series B investors in the US back most?
On this list: AI (126), SaaS and B2B software (108), healthtech and digital health (69) and fintech (59). Sector is our research and a firm can carry more than one.

### Which Series B investors in the US raised a new fund in the last 12 months?
69 of the 165 have a fund filing dated in the last 12 months. The most recent on this list are 01A (Nov 2026), IVP: Venture capital for the Exceptional (Oct 2026) and True Beauty Ventures (Oct 2026).

### Where does the data on Series B investors in the US come from and how often is it updated?
162 of the 165 rows have an SEC filing on file (Form D or Form ADV) and 3 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 7 Nov 2026 at the latest. The whole file is re-verified twice a year.

### Can I download the list of Series B investors in the US as a spreadsheet?
Yes. The file holds all 165 rows in Excel and CSV, with 933 named decision-makers and 62 firm emails, for $49 one-time. 25 rows are free on this page.