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Series B investors active this year

224 US Series B investors filed a new fund, deal vehicle or board seat with the SEC in the last 12 months, 86 (38%) of them in the last 90 days. The top home states are California (98), New York (40) and Massachusetts (22); the most common sectors are AI & ML (88), Healthcare (48) and B2B Software (48). For the 194 with a stated or estimated check size, the median range is $2.5M–$7.6M. Stage comes from the investor's own website where it says; otherwise from fund size and the rounds it has joined, with angels, syndicates and accelerators counted as pre-seed and seed.

Updated from SEC filings · How we build this list

How many Series B investors are investing right now?

224 filed a new fund, deal vehicle or board seat with the SEC in the last 12 months, 86 of them in the last 90 days.

How much do Series B investors typically invest?

The median estimated check is $2.5M–$7.6M, across 194 investors with a plausible estimate. Actual checks vary by round and lead role.

Where are Series B investors based?

Most are in California (98), New York (40) and Massachusetts (22).

What sectors do Series B investors back most?

AI & ML (88), Healthcare (48) and B2B Software (48) lead, by investors with recent activity in each.

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  • MW LSV AmanVC firm · Los Angeles, CA

    Seed to Series B · checks $2M–$6M (est.)

    Sector focus not yet verified

  • Vianti CapitalVC firm · Boston, MA

    Seed to Growth · checks $2M–$6M (est.)

    Biotech & PharmaHealthcare

  • venBio Global StrategicVC firm · San Francisco, CA

    Seed to Growth · checks $5.05M–$15.2M (est.)

    Biotech & Pharma

  • SOSVVC firm · Princeton, NJ

    Pre-seed to Series B · checks $75K–$200K (est.)

    Deep Tech

  • OmegaVC firm · Boston, MA

    Seed to Growth · checks $5.8M–$17.4M (est.)

    Biotech & PharmaHealthcareAI & MLCybersecurity

  • Fireside Ventures InvestmentVC firm

    Seed to Series B · checks $2.52M–$7.6M (est.)

    Sector focus not yet verified

  • Village GlobalVC firm · Covina, CA

    Seed to Series B · checks $3.52M–$10.6M (est.)

    AI & MLClimate & Energy

  • Helena Special InvestmentsVC firm · New York, NY

    Seed to Series B · checks $2M–$6M (est.)

    HealthcareClimate & Energy

  • SonderVC firm · San Carlos, CA

    Seed to Series B · checks $75K–$250K (est.)

    HealthcareBiotech & Pharma

  • CHAP Capital OneVC firm · Fremont, CA

    Seed to Series B · checks $2.5M–$7.5M (est.)

    Sector focus not yet verified

  • Cure VenturesVC firm · Boston, MA

    Seed to Growth · checks $3.5M–$10.5M (est.)

    Biotech & Pharma

  • Zeev VenturesVC firm · Palo Alto, CA

    Series A to Growth · checks $8.15M–$24.5M (est.)

    InsurtechAI & ML

  • GaingelsSyndicate · Burlington, VT

    Pre-seed to Growth · checks $50K–$150K (est.)

    ConsumerB2B SoftwareAI & MLHealthcare

  • S3 VenturesVC firm · Austin, TX

    Seed to Series B

    HealthcareIndustrial & Manufacturing

  • NSVVC firm · Greenwich, CT

    Series A to Growth · checks $200K–$600K (est.)

    SpaceB2B SoftwareBiotech & Pharma

  • Clean Energy VentureVC firm · Boston, MA

    Seed to Series B · checks $3.05M–$9.15M (est.)

    Climate & EnergyB2B Software

  • WaldoVC firm · New York, NY

    Seed to Series B · checks $2.25M–$6.75M (est.)

    B2B Software

  • Altira TechnologyVC firm · Denver, CO

    Seed to Series B · checks $2M–$6M (est.)

    Climate & Energy

  • Ballistic VenturesVC firm · Menlo Park, CA

    Seed, Series B · checks $1.3M–$3.9M (est.)

    CybersecurityAI & ML

  • Light Street BeaconVC firm · Palo Alto, CA

    Seed to Series B · checks $4.5M–$13.5M (est.)

    Sector focus not yet verified

  • A. Capital PartnersVC firm · San Francisco, CA

    Seed to Series B · checks $3.5M–$10.5M (est.)

    Sector focus not yet verified

  • SYN VenturesVC firm · West Palm Beach, FL

    Seed to Series B · checks $3M–$9M (est.)

    Cybersecurity

  • BlueCross BlueShield Venture PartnersVC firm · Chicago, IL

    Seed to Series B · checks $3.7M–$11.1M (est.)

    HealthcareB2B Software

  • Anorak VenturesVC firm · Los Angeles, CA

    Pre-seed to Series B · checks $350K–$1.05M (est.)

    Developer ToolsMedia, Gaming & CreatorAI & ML