# Series B B2B investors (2026 list) > 67 series B B2B investors, 91% active in the last 12 months. Led by Y Combinator, 500 Global, Andreessen Horowitz. Ranked by what they funded. Source: https://millionrounds.com/lists/series-b-b2b-investors (Millionrounds; every figure on the page links to its filing or article) [Investor Lists](https://millionrounds.com/lists) # Series B B2B investors Updated 7 November 2026 Firms we have watched take part in a Series B round raised by a B2B company in the last two years. Both the stage and the sector are what they did, not what their website says. [See all 67 *→*](https://millionrounds.com/login?join=1&next=%2Fapp%2Finvestor-lists%2Fseries-b-b2b-investors)The top 25 **67** investors on the list *+1* this week **3,818** cheques in 12 months *-9%* against the market **$15M** median round they joined *+88%* against the market median **91%** wrote a cheque in 12 months **78%** 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 [500 Global](https://millionrounds.com/fund/500-startups) *Deploying now* Angel · United States **2,140** **$3.6M** median round **Oct 2026** last seen - 3 [Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz) *Deploying now* VC firm · United States **1,661** **$27M** median round **Nov 2026** last seen - 4 [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) *Deploying now* VC firm · United States **1,598** **$12M** median round **Nov 2026** last seen - 5 [General Catalyst](https://millionrounds.com/fund/general-catalyst) *Deploying now* VC firm · United States **1,387** **$27M** median round **Nov 2026** last seen - 6 [Lightspeed Venture Partners](https://millionrounds.com/fund/lightspeed-venture-partners) *Deploying now* VC firm · United States **1,341** **$35M** median round **Nov 2026** last seen - 7 [Index Ventures](https://millionrounds.com/fund/index-ventures) *Deploying now* VC firm · United Kingdom **1,027** **$31M** median round **Nov 2026** last seen - 8 [Google Ventures](https://millionrounds.com/fund/gv) *Deploying now* Corporate VC · United States **884** **$38M** median round **Oct 2026** last seen - 9 [FJ Labs](https://millionrounds.com/fund/fj-labs) *Deploying now* VC firm · United States **849** **$11M** median round **Oct 2026** last seen - 10 [Right Side Capital Management](https://millionrounds.com/fund/right-side-capital-management) *Deploying now* VC firm · United States **834** **$875K** median round **Sept 2026** last seen - 11 [BoxGroup](https://millionrounds.com/fund/boxgroup) *Deploying now* VC firm · United States **773** **$18M** median round **Nov 2026** last seen - 12 [Liquid 2 Ventures](https://millionrounds.com/fund/liquid-2-ventures) *Deploying now* VC firm · United States **636** **$7M** median round **Oct 2026** last seen - 13 [Pioneer Fund](https://millionrounds.com/fund/pioneer-fund-2) *Deploying now* Private equity · United States **551** **$2.9M** median round **Nov 2026** last seen - 14 [Bain Capital Ventures](https://millionrounds.com/fund/bain-capital-ventures) *Deploying now* VC firm · United States **524** **$27M** median round **Nov 2026** last seen - 15 [Seedcamp](https://millionrounds.com/fund/seedcamp) *Deploying now* VC firm · United Kingdom **519** **$5M** median round **Nov 2026** last seen - 16 [Spark Capital](https://millionrounds.com/fund/spark-capital) *Deploying now* VC firm · United States **471** **$40M** median round **Oct 2026** last seen - 17 [Speedinvest](https://millionrounds.com/fund/speedinvest) *Deploying now* VC firm · Austria **345** **$6.7M** median round **Nov 2026** last seen - 18 [Endeavor Catalyst](https://millionrounds.com/fund/endeavor-catalyst) *Deploying now* Corporate VC · United States **318** **$30M** median round **Oct 2026** last seen - 19 [Headline](https://millionrounds.com/fund/headline) *Deploying now* VC firm · United States **307** **$15M** median round **Oct 2026** last seen - 20 [Nexus Venture Partners](https://millionrounds.com/fund/nexus-venture-partners) *Deploying now* VC firm · United States **294** **$13M** median round **Oct 2026** last seen - 21 [Angel Invest](https://millionrounds.com/fund/angel-invest) *Deploying now* VC firm · Germany **282** **$1.5M** median round **Nov 2026** last seen - 22 [Northzone](https://millionrounds.com/fund/northzone) *Deploying now* VC firm · United Kingdom **240** **$22M** median round **Oct 2026** last seen - 23 [Thrive Capital](https://millionrounds.com/fund/thrive-capital-2) *Deploying now* Family office **240** **$50M** median round **Oct 2026** last seen - 24 [Startup Wise Guys](https://millionrounds.com/fund/startup-wise-guys) *Deploying now* Accelerator · Estonia **237** **$551K** median round **Sept 2026** last seen - 25 [Reach](https://millionrounds.com/fund/reach) *Deploying now* VC firm · Canada **217** **$5M** median round **Sept 2026** last seen **42 more on this list** All 67 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-b2b-investors) ## The Newest Cheques Rounds this list's investors joined most recently - **5** Nov **[Saidot](https://millionrounds.com/company/saidot)** Round *With* [Crowberry Capital](https://millionrounds.com/fund/crowberry-capital) - **5** Nov **[firmly](https://millionrounds.com/company/firmly)** Series A · $15M *With* [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) - **5** Nov **[Nyquis](https://millionrounds.com/company/nyquis)** Seed · $6.3M *With* [Pioneer Fund](https://millionrounds.com/fund/pioneer-fund-2) - **5** Nov **[Granit](https://millionrounds.com/company/granit)** Seed · $6M *Led by* [Seedcamp](https://millionrounds.com/fund/seedcamp) - **5** Nov **[RadianX](https://millionrounds.com/company/radianx)** Seed · $9M *With* [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) - **5** Nov **[Pliant](https://millionrounds.com/company/pliant)** Series C · $80M *Led by* [Speedinvest](https://millionrounds.com/fund/speedinvest) ## Stages This Year 2,861 rounds - Venture **20%** - Seed **19%** - Series A **17%** - Pre-seed **12%** - Series B **9%** - Other **23%** ## What They Backed Sectors, last 12 months - AI **1,435** - Fintech **224** - Big Data & Analytics **161** - Healthcare **141** - Financial Services **126** - Aerospace & Space **103** ## Cheques by Quarter Led Joined 1,125 Q1 25 1,034 Q2 25 1,164 Q3 25 1,235 Q4 25 1,168 Q1 26 1,088 Q2 26 842 Q3 26 227 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 b2b software and saas - Lean B2B: Build Products Businesses Want Étienne Garbugli · 2014 4.16 from 249 ratings on Goodreads B2B software and SaaS About the book www.leanb2bbook.com « This is a must read for every B2B entrepreneur, SaaS creator or consultant and business school student. It's the kind of book you don't read once, you go back to it on a regular basis. » - Carmen Gerea, CEO & Co-founder, UsabilityChefs Lean B2B helps… On AmazonListen on Audible - The Pricing Roadmap: How to Design B2B SaaS Pricing Models That Your Customers Will Love Ulrik Lehrskov-Schmidt · 2023 4.43 from 207 ratings on Goodreads B2B software and SaaS About the book "The definitive resource on SaaS pricing, I absolutely can not recommend this book enough." Viktor Heide, COO of Contractbook.com, Forbes "30 under 30" A foolproof method to achieve skyrocketing sales, growth, and profits for your software as a service (SaaS) product starts… On AmazonListen on Audible - Integrity: The Courage to Meet the Demands of Reality Henry Cloud · 2006 4.22 from 3,393 ratings on Goodreads B2B software and SaaS About the book Integrity. It is more than simple honesty. It's the key to success. A person with integrity has the -- often rare -- ability to pull everything together, to make it all happen no matter how challenging the circumstances. Drawing on experiences from his work with Fortune 500… On AmazonListen on Audible - Blueprints for a SaaS Sales Organization by Jacco vanderKooij Jacco van der Kooij · 2015 4.33 from 324 ratings on Goodreads B2B software and SaaS About the book Because of their very nature, SaaS companies live and die on revenue growth. And once the service is ready there is a very small window in which to scale. Missing that window is the difference between massive success and mediocrity. With such high stakes, it is crucial to get a… On AmazonListen on Audible More books for founders and investors on the [Reading List](https://millionrounds.com/reading-list?role=founder&model=b2b_software&stage=scaling). As an Amazon Associate we earn from qualifying purchases. ## Quick answers about series B B2B investors ### Who are the most active series B B2B investors? By cheques observed, the most active are Y Combinator, 500 Global, Andreessen Horowitz, Alumni Ventures and General Catalyst. ### How many series B B2B investors are there? 67 are on record. 91% made an investment in the last 12 months and 78% have led a round. ### Which stages do series B B2B investors back? Of the rounds with a named stage in the last 12 months, mostly Seed (25%) and Series A (24%). ### How big are the rounds series B B2B investors join? The typical (median) round among the leading investors here is $13M. ### Which sectors do series B B2B investors back most? In the last 12 months, mostly AI, Fintech and Big Data & Analytics. ### Which series B B2B investors lead the most rounds? Andreessen Horowitz (114 led), General Catalyst (97 led) and Lightspeed Venture Partners (83 led). ### Where are series B B2B investors based? Among the most active, most are based in the United States (17), the United Kingdom (3) and Austria (1). ### What have series B B2B investors invested in recently? Recent rounds include Saidot (Nov 2026, with Crowberry Capital), firmly (Series A, Nov 2026, with Alumni Ventures) and Nyquis (Seed, Nov 2026, with Pioneer Fund). Built from the rounds we watched, refreshed every night. [How we count](https://millionrounds.com/methodology) · [Report a correction](https://millionrounds.com/corrections)