--- title: "16 Series A Marketplace Investors in the US (Nov 2026)" last_updated: "2026-11-06" rows: "16" free_rows: "10" source: "SEC filings" canonical: "https://theinvestordatabase.com/lists/series-a-marketplace-investors-us/" --- # 16 Series A marketplace investors in the US We list 16 Series A marketplace investors in the US as of November 2026: each has an SEC filing on file, and the list was last checked on 6 Nov 2026. The cities with the most head offices on this list are New York (4), San Francisco (3) and Atlanta (2). - 16 investors - 10 with a fund filing or dated deal in the last 12 months - $89M median fund size on file (SEC Form D, 10 firms) - 97 named decision-makers on file ## First 10 of 16 Series A marketplace investors in the US | Investor | Type | HQ | Stages (our research) | Focus (our research) | Latest fund or deal | Fund size | Checked | Profile | |---|---|---|---|---|---|---|---|---| | SignalFire | VC firm | San Francisco, CA | Seed, Series A, Series B, Growth | Marketplace, AI, Healthtech, Developer Tools | New fund, May 2026 | $357M (SEC Form D, 2021) | 2026-11-04 | https://theinvestordatabase.com/investors/signalfire/ | | Autotech Ventures | VC firm | Menlo Park, CA | Pre-seed, Seed, Series A, Series B | Marketplace, Mobility, AI, Logistics | New fund, Aug 2026 | $25M (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/third-mind/ | | Techsquare Ventures | VC firm | Atlanta, GA | Pre-seed, Seed, Series A | Marketplace, AI, Data, Cybersecurity | New fund, May 2026 | $49M (SEC Form D, 2025) | 2026-11-04 | https://theinvestordatabase.com/investors/techsquare-ventures/ | | Great Oaks Venture Capital | VC firm | New York, NY | Pre-seed, Seed, Series A | Marketplace, Healthtech, Generalist, SaaS | Portfolio news, Sep 2026 | $20M (SEC Form ADV) | 2026-11-05 | https://theinvestordatabase.com/investors/great-oaks-venture-capital/ | | Origin Ventures | VC firm | Chicago, IL | Seed, Series A | Marketplace, AI, Future of Work, SaaS | New deal, May 2026 | $130M (SEC Form D, 2023) | 2026-11-05 | https://theinvestordatabase.com/investors/origin-ventures/ | | BIP Ventures | VC firm | Atlanta, GA | Seed, Series A, Series B | Marketplace, Healthtech, Fintech, Developer Tools | New fund, Aug 2026 | $20M (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/bip-ventures/ | | Clearstone Venture Partners | VC firm | Santa Monica, CA | Seed, Series A | Marketplace, Fintech, B2B, SaaS | | $359M (SEC Form ADV) | 2026-11-05 | https://theinvestordatabase.com/investors/clearstone-venture-partners/ | | AlleyCorp | VC firm | New York, NY | Pre-seed, Seed, Series A | Marketplace, AI, Fintech, Healthtech | New fund, Jun 2026 | $335M (SEC Form D, 2025) | 2026-11-04 | https://theinvestordatabase.com/investors/alleycorp/ | | Forerunner Ventures | VC firm | San Francisco, CA | Seed, Series A | Marketplace, Consumer, AI | | $4.2B (SEC Form ADV) | 2026-11-05 | https://theinvestordatabase.com/investors/forerunner-ventures/ | | BTN.vc | VC firm | Pittsburgh, PA | Pre-seed, Seed, Series A | Marketplace, Healthtech, Edtech, Proptech | New fund, Sep 2025 | $50M (SEC Form ADV) | 2026-11-05 | https://theinvestordatabase.com/investors/btn-vc/ | You are seeing 10 of 16. The full list adds 6 more investors and 97 named decision-makers. Get all 16 investors and 97 named contacts, $49, one-time: https://theinvestordatabase.com/buy/list/series-a-marketplace-investors-us This page: https://theinvestordatabase.com/lists/series-a-marketplace-investors-us/ ## Method and limits - Source: All 16 rows carry an SEC filing (Form D or Form ADV). All 16 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 marketplaces 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 A. - Order: Activity score out of 100: recency of the latest fund filing or dated deal (30: full marks within 3 months, then stepping down at 6, 12 and 24 months), share of the observed portfolio in this sector (20; half of that when the sector is stated only), stage focus (15: all of it when Series A 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 (12) and completeness of the public record (8). 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 16 rows: stage 16, sector 16, fund size 15, website 16. In the paid file: named decision-makers on 14 rows, firm email on 4, LinkedIn page on 7, check size on 3. ## Questions ### How many Series A marketplace investors in the US are there? We list 16 as of November 2026. 10 of the 16 have a fund filing or a dated deal in the last 12 months. The cities with the most are New York (4), San Francisco (3) and Atlanta (2). ### Which Series A marketplace investors in the US raised a new fund in the last 12 months? 7 of the 16 have a fund filing dated in the last 12 months. The most recent on this list are Autotech Ventures (Aug 2026), BIP Ventures (Aug 2026) and Culture Capital (Jun 2026). ### What is the typical fund size of Series A marketplace investors in the US? The median fund size on file for this list is $89M, across the 10 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 6 do not disclose a size there. ### How do I contact Series A marketplace investors in the US? The paid file holds 97 named decision-makers across 14 of these 16 and a firm email for 4. 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 A marketplace investors in the US come from? All 16 rows have an SEC filing on file (Form D or Form ADV). 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 6 Nov 2026 at the latest. The whole file is re-verified twice a year.