# Series B marketplaces investors (2026 list)

> 34 series B marketplaces investors, 94% active in the last 12 months. Led by Y Combinator, Andreessen Horowitz, General Catalyst. Ranked by what they funded.

Source: https://millionrounds.com/lists/series-b-marketplace-investors (Millionrounds; every figure on the page links to its filing or article)

[Investor Lists](https://millionrounds.com/lists)

# Series B marketplaces investors

Updated 7 November 2026

Firms we have watched take part in a Series B round raised by a marketplaces company in the last two years. Both the stage and the sector are what they did, not what their website says.

[See all 34 *→*](https://millionrounds.com/login?join=1&next=%2Fapp%2Finvestor-lists%2Fseries-b-marketplace-investors)The top 25

**34** investors on the list *+5* this week

**2,507** cheques in 12 months *-8%* against the market

**$20M** median round they joined *+150%* against the market median

**94%** wrote a cheque in 12 months

**74%** have led a round

## The Top 25

Ordered by cheques observed, never by anything anyone paid for

Deploying now (25)

- 1 [Y Combinator](https://millionrounds.com/fund/y-combinator) *Deploying now* Accelerator · United States **6,412** **$3M** median round **Oct 2026** last seen
- 2 [Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz) *Deploying now* VC firm · United States **1,661** **$27M** median round **Nov 2026** last seen
- 3 [General Catalyst](https://millionrounds.com/fund/general-catalyst) *Deploying now* VC firm · United States **1,387** **$27M** median round **Nov 2026** last seen
- 4 [FJ Labs](https://millionrounds.com/fund/fj-labs) *Deploying now* VC firm · United States **849** **$11M** median round **Oct 2026** last seen
- 5 [BoxGroup](https://millionrounds.com/fund/boxgroup) *Deploying now* VC firm · United States **773** **$18M** median round **Nov 2026** last seen
- 6 [Antler](https://millionrounds.com/fund/antler) *Deploying now* VC firm · United Kingdom **729** **$1M** median round **Nov 2026** last seen
- 7 [Benchmark](https://millionrounds.com/fund/benchmark) *Deploying now* VC firm · United States **587** **$30M** median round **Oct 2026** last seen
- 8 [Pioneer Fund](https://millionrounds.com/fund/pioneer-fund-2) *Deploying now* Private equity · United States **551** **$2.9M** median round **Nov 2026** last seen
- 9 [Bain Capital Ventures](https://millionrounds.com/fund/bain-capital-ventures) *Deploying now* VC firm · United States **524** **$27M** median round **Nov 2026** last seen
- 10 [Partech Ventures](https://millionrounds.com/fund/partech) *Deploying now* VC firm · France **444** **$15M** median round **Oct 2026** last seen
- 11 [Endeavor Catalyst](https://millionrounds.com/fund/endeavor-catalyst) *Deploying now* Corporate VC · United States **318** **$30M** median round **Oct 2026** last seen
- 12 [Craft Ventures](https://millionrounds.com/fund/craft-ventures) *Deploying now* VC firm · United States **283** **$14M** median round **Oct 2026** last seen
- 13 [Forerunner Ventures](https://millionrounds.com/fund/forerunner-ventures) *Deploying now* VC firm · United States **225** **$20M** median round **Oct 2026** last seen
- 14 [HV Capital](https://millionrounds.com/fund/hv-capital) *Deploying now* VC firm · Germany **166** **$20M** median round **Oct 2026** last seen
- 15 [IQ Capital](https://millionrounds.com/fund/iq-capital) *Deploying now* VC firm · United Kingdom **165** **$17M** median round **Oct 2026** last seen
- 16 [Eli Lilly](https://millionrounds.com/fund/eli-lilly) *Deploying now* Corporate VC · United States **137** **$56M** median round **Nov 2026** last seen
- 17 [AlleyCorp](https://millionrounds.com/fund/alleycorp) *Deploying now* Venture studio · United States **122** **$10M** median round **Sept 2026** last seen
- 18 [Endeavor](https://millionrounds.com/fund/endeavor) *Deploying now* Corporate VC · United States **106** **$25M** median round **Sept 2026** last seen
- 19 [Matrix](https://millionrounds.com/fund/matrix) *Deploying now* Hedge fund · United Arab Emirates **104** **$31M** median round **Nov 2026** last seen
- 20 [Breyer Capital](https://millionrounds.com/fund/breyer-capital) *Deploying now* Private equity · United States **69** **$24M** median round **Oct 2026** last seen
- 21 [eBay](https://millionrounds.com/fund/ebay) *Deploying now* Corporate VC · United States **32** **$25M** median round **Jul 2026** last seen
- 22 [BECO Capital](https://millionrounds.com/fund/beco-capital) *Deploying now* VC firm · United Arab Emirates **18** **$8M** median round **Sept 2026** last seen
- 23 [4DX Ventures](https://millionrounds.com/fund/4dx-ventures) *Deploying now* VC firm · Ghana **8** **$6M** median round **Nov 2026** last seen
- 24 [Burda Principal Investments](https://millionrounds.com/fund/burda-principal-investments) *Deploying now* Corporate VC · Germany **8** **$20M** median round **Jul 2026** last seen
- 25 [Glade Brook Capital Partners](https://millionrounds.com/fund/glade-brook-capital) *Deploying now* VC firm · United States **7** **$60M** median round **Sept 2026** last seen

**9 more on this list**

All 34 are in the app, with filters for stage, sector and market. A free account shows 10 per search, Pro up to 1,000.

[See the whole list *→*](https://millionrounds.com/login?join=1&next=%2Fapp%2Finvestor-lists%2Fseries-b-marketplace-investors)

## The Newest Cheques

Rounds this list's investors joined most recently

- **5** Nov **[T-Therapeutics](https://millionrounds.com/company/t-therapeutics)** Series B · $133M *With* [Eli Lilly](https://millionrounds.com/fund/eli-lilly)
- **5** Nov **[Nyquis](https://millionrounds.com/company/nyquis)** Seed · $6.3M *With* [Pioneer Fund](https://millionrounds.com/fund/pioneer-fund-2)
- **4** Nov **[Enza](https://millionrounds.com/company/enza)** Seed · $6M *Led by* [4DX Ventures](https://millionrounds.com/fund/4dx-ventures)
- **4** Nov **[Nooks](https://millionrounds.com/company/nooks)** Growth · $500M *Led by* [General Catalyst](https://millionrounds.com/fund/general-catalyst)
- **4** Nov **[Phaze Inc.](https://millionrounds.com/company/phaze-inc)** Seed · $8.8M *Led by* [Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz)
- **3** Nov **[Vereda](https://millionrounds.com/company/vereda)** Seed · $5.5M *With* [Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz)

## Stages This Year

2,069 rounds

- Venture **20%**
- Seed **18%**
- Pre-seed **16%**
- Series A **16%**
- Series B **8%**
- Other **23%**

## What They Backed

Sectors, last 12 months

- AI **1,074**
- Fintech **161**
- Big Data & Analytics **115**
- Healthcare **106**
- Financial Services **89**
- Biotech **86**

## Cheques by Quarter

Led Joined

702 Q1 25

650 Q2 25

827 Q3 25

827 Q4 25

746 Q1 26

703 Q2 26

542 Q3 26

149 Q4 26

The last bar is the quarter still running.

## Lists Like This

- [Seed AI investors 2,922](https://millionrounds.com/lists/seed-ai-investors)
- [Series A AI investors 2,490](https://millionrounds.com/lists/series-a-ai-investors)
- [Series B AI investors 1,557](https://millionrounds.com/lists/series-b-ai-investors)
- [Pre-seed AI investors 1,286](https://millionrounds.com/lists/pre-seed-ai-investors)
- [Growth AI investors 1,186](https://millionrounds.com/lists/growth-ai-investors)
- [Series A fintech investors 950](https://millionrounds.com/lists/series-a-fintech-investors)
- [Series C AI investors 930](https://millionrounds.com/lists/series-c-ai-investors)
- [Seed fintech investors 925](https://millionrounds.com/lists/seed-fintech-investors)
- [Series A biotech investors 650](https://millionrounds.com/lists/series-a-biotech-investors)

[All investor lists *→*](https://millionrounds.com/lists)

## Reading for founders in marketplace or platform

- Trailblazer: The Power of Business as the Greatest Platform for Change [Marc Benioff](https://millionrounds.com/person/marc-benioff) · 2019 3.81 from 2,358 ratings on Goodreads Marketplace or platform About the book NEW YORK TIMES BESTSELLER • The founder and co-CEO of Salesforce delivers an inspiring vision for successful companies of the future, in which changing the world is everyone’s business.“An urgent and compelling book for anyone in business who yearns to fulfill a higher mission in… On AmazonListen on Audible
- Sams Teach Yourself SQL™ in 10 Minutes Ben Forta · 1999 4.09 from 1,187 ratings on Goodreads Marketplace or platform About the book Sams Teach Yourself SQL in 10 Minutes has established itself as the gold standard for introductory SQL books, offering a fast-paced accessible tutorial to the major themes and techniques involved in applying the SQL language. Forta¿s examples are clear and his writing style is… On AmazonListen on Audible
- How to Market a Book Joanna Penn · 2013 4.43 from 1,374 ratings on Goodreads Marketplace or platform About the book The first job of an author is, of course, to write great books, but these days, their second job is to market them. Marketing isn't a skill that most authors have naturally, and there is little formal training. But when your book hits the shelves, and the sales don't start… On AmazonListen on Audible
- The Internet Con: How to Seize the Means of Computation Cory Doctorow · 2023 4.14 from 1,404 ratings on Goodreads Marketplace or platform About the book A detailed disassembly manual for people who want to dismantle Big Tech When the tech platforms promised a future of "connection," they were lying. They said their "walled gardens" would keep us safe, but those were prison walls. The platforms locked us into their systems… On AmazonListen on Audible

More books for founders and investors on the [Reading List](https://millionrounds.com/reading-list?role=founder&model=marketplace&stage=scaling).

As an Amazon Associate we earn from qualifying purchases.

## Quick answers about series B marketplaces investors

### Who are the most active series B marketplaces investors?

By cheques observed, the most active are Y Combinator, Andreessen Horowitz, General Catalyst, FJ Labs and BoxGroup.

### How many series B marketplaces investors are there?

34 are on record. 94% made an investment in the last 12 months and 74% have led a round.

### Which stages do series B marketplaces investors back?

Of the rounds with a named stage in the last 12 months, mostly Seed (24%) and Pre-seed (22%).

### How big are the rounds series B marketplaces investors join?

The typical (median) round among the leading investors here is $20M.

### Which sectors do series B marketplaces investors back most?

In the last 12 months, mostly AI, Fintech and Big Data & Analytics.

### Which series B marketplaces investors lead the most rounds?

Andreessen Horowitz (114 led), General Catalyst (97 led) and Bain Capital Ventures (31 led).

### Where are series B marketplaces investors based?

Among the most active, most are based in the United States (17), the United Kingdom (2) and Germany (2).

### What have series B marketplaces investors invested in recently?

Recent rounds include T-Therapeutics (Series B, Nov 2026, with Eli Lilly), Nyquis (Seed, Nov 2026, with Pioneer Fund) and Enza (Seed, Nov 2026, with 4DX Ventures).

Built from the rounds we watched, refreshed every night. [How we count](https://millionrounds.com/methodology) · [Report a correction](https://millionrounds.com/corrections)