List of Recently Funded Series B Startups (2025)

Series B Startups aren’t figuring things out. They’re scaling up fast! By Series B, startups have proven products, real traction, and millions in fresh funding to accelerate growth.

They’re not just making hires, they’re building full teams. They’re not just trying tools, they’re investing in systems, partnerships, and leadership that will take them to the next level.

At Fundraise Insider, we track newly funded Series B startups across the US and give you direct access to the founders, VPs, and department heads driving expansion – the best sales prospecting leads.

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Recently Funded Series B Startups

Download the full list of funded startups (for weekly leads, click here)

Other Recently Funded Startups Data

• Recently funded Pre-Seed startups
• Recently funded Seed startups
• Recently funded Series A startups
• Recently funded Series C startups
• Recently funded Series D startups
• Recently funded Series E startups
• Top funded AI startups
• Recently funded startups across all funding stages

Series B Startup Funding Statistics and Trends

Total Series B Startup Rounds and Timing

• 115 financings from January 6, 2025 through April 18, 2025 (22 rounds in April, 29 in March, 39 in February, 25 in January).

Descriptive Statistics of Series B Startup Funding Checks

• Average deal: $182.4 M; median: $38 M; IQR: $25 M–$67.75 M.

• Range spans $0 (4 undisclosed rounds) up to a $14.5 B mega-raise.

Monthly Series B Funding Volume and Capital Deployed

• January: 25 rounds, $1.083 B total

• February: 39 rounds, $2.886 B

• March: 29 rounds, $15.8697 B (spike from mega-rounds)

• April: 22 rounds (to 4/18), $1.135 B

Top Industries by Series B Funding Round Count

1. Information Technology & Services (48 rounds)

2. Research (10)

3. Environmental Services (5)

4. Hospital & Health Care (4)

5. Computer & Network Security (4)

Top Industries by Total Series B Capital

1. Semiconductors: $14.614 B (few blockbuster raises)

2. Information Technology & Services: $3.063 B

3. Research: $0.835 B

4. Environmental Services: $0.313 B

5. Financial Services: $0.295 B

Geographic Concentration for Series B Startup Funding (Top 5 States)

• By Deal Count: California (48), New York (17), Massachusetts (12), Washington (6), Michigan (5)

• By Capital Deployed: California ($17.873 B), New York ($0.811 B), Massachusetts ($0.547 B), Washington ($0.343 B), Texas ($0.2915 B)

Series B Funding: Growth Curves Across Top Industries Compared

The growth curves for the top five Series B industries illustrate:

• Semiconductors (blue line) dominate with a massive $14.614 B in March, showing a single blockbuster mid-quarter peak.

• Information Technology and Services (red line) climbs from $50 M in January to $180 M in February, then dips and slightly recovers by April.

• Research (pink line) remains steady around $20-30 M each month, peaking modestly in March.

• Financial Services (orange line) shows a gradual rise from $15 M to $60 M over the period.

• Environmental Services (gold line) exhibits low activity, with sporadic small raises around $10-30 M.

Key Takeaways:

• Tidal Waves vs. Ripples: Semiconductors represent tidal-wave capital, whereas Research and Financial Services are more like steady ripples.

• Timing Semiconductor Bets: Mid-quarter (March) is crucial for capturing semiconductor Series B funding .

• Steady Plays: Research and Financial Services deliver consistent, lower-volatility funding, ideal for predictable deal flow.

• Niche Signals: Environmental Services requires opportunistic sourcing given its low and sporadic activity.

Exceptionally Large and Small Series B Startup Funding Rounds

These outliers help pinpoint blockbuster mega-rounds alongside much smaller or undisclosed financings in Q1–Q2 2025.

Exceptionally Large Series B Rounds (> $131.9 M)

• Mitra Chem (Semiconductors): $14.5 B on 2025-03-20

• MODE (Information Technology & Services): $800 M on 2025-02-12

• Together (Information Technology & Services): $305 M on 2025-02-20

• Base Power (Electrical/Electronic Manufacturing): $200 M on 2025-04-09

• Chestnut Carbon (Environmental Services): $160 M on 2025-02-12

Exceptionally Small Series B Rounds (≤ $12.75 M)

• Big Bold Health (Health, Wellness & Fitness): $2.999983 M on 2025-01-16

• iVeena (Pharmaceuticals): $3 M on 2025-02-05

• Noble Gas Systems (Mechanical/Industrial Engineering): $4.2 M on 2025-03-19

• Ria Health (Medical Practice): $6.5 M on 2025-03-06

• Hypori (Computer & Network Security): $12 M on 2025-01-28

Strategic Targeting in Series B Startup Funding Rounds

Average Series B Funding Deal Size by Industry

• Semiconductors: $3.65 B average (driven by mega-rounds)

• Electrical/Electronic Manufacturing: $200 M

• Defense & Space: $110 M

• Research: $83.5 M

• Entertainment: $80 M

Average Series B Startups Funding Deal Size by Geography

• California: $372.4 M (largest hub for both volume and value)

• North Carolina: $80 M

• Texas: $72.9 M

• Pennsylvania: $67.5 M

• British Columbia: $66.3 M

Industry–State Clusters for Series B Funding Targeting

• Semiconductors

  • California: 2 rounds @ $7.26 B avg

  • Michigan: 1 round @ $44 M

  • Washington: 1 round @ $45 M

• Information Technology and Services

  • California: 25 rounds @ $90.5 M avg

  • New York: 13 rounds @ $42.9 M avg

  • Massachusetts: 2 rounds @ $34 M avg

• Research

  • Massachusetts: 5 rounds @ $59.9 M avg

  • California: 2 rounds @ $109 M avg

  • Washington: 2 rounds @ $125 M avg

• Environmental Services

  • California: 2 rounds @ $23 M avg

  • Colorado: 1 round @ $82 M

  • New York: 1 round @ $160 M

• Financial Services

  • California: 2 rounds @ $78.5 M avg

  • Tennessee: 1 round @ $75 M

  • Georgia: 1 round @ $63 M

Strategic Takeaways:

Blockbuster vs. Boutique: Semiconductors in California demand enormous checks, ideal for major capital allocators, whereas sectors like Environmental Services and Financial Services offer mid-size but still substantial deals.

Volume Hubs: California is the go-to for deal flow across multiple industries; New York and Massachusetts are strong secondary markets, particularly for IT Services and Research.

Niche Opportunities: Colorado and Georgia show single high-value Environmental and Financial rounds, respectively, worth a closer look for differentiated bets.