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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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  • Fuel Venture CapitalVC firm · Miami, FL

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

    AI & MLCybersecurityClimate & Energy

  • Alpha Annex TelemedSyndicate · New York, NY

    Seed to Growth · checks $3.85M–$7.7M (est.)

    HealthcareAI & MLCybersecurityReal Estate & PropTech

  • CentanaVC firm · New York, NY

    Series B, Growth · checks $6M–$18M (est.)

    B2B SoftwareAI & MLFintech

  • M13 SoVC firm · Santa Monica, CA

    Seed to Series B · checks $4M–$12M (est.)

    E-commerce & RetailConsumer

  • ARMRA Capital PartnersVC firm · Boerne, TX

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

    Sector focus not yet verified

  • CantosSyndicate · San Francisco, CA

    Pre-seed to Series B · checks $800K–$3.05M (est.)

    Biotech & PharmaAI & MLHardware & RoboticsClimate & Energy

  • CrosslinkVC firm · Menlo Park, CA

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

    InsurtechAI & MLCybersecurity

  • Play Ventures Investments VCCVC firm

    Seed, Series B

    Media, Gaming & Creator

  • NewViewVC firm · Burlingame, CA

    Seed to Growth · checks $2.02M–$49.6M (est.)

    B2B SoftwareAI & ML

  • Construct CapitalVC firm · Washington, DC

    Seed to Series B · checks $1.5M–$4.5M (est.)

    Hardware & RoboticsIndustrial & ManufacturingMobility & LogisticsFintech+1

  • Banner VCVC firm · Austin, TX

    Seed to Series B · checks $2.2M–$6.6M (est.)

    Space

  • avraVC firm · Hillsborough, CA

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

    Sector focus not yet verified

  • CIV TNCVC firm · Venice, CA

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

    Sector focus not yet verified

  • NeoVC firm · San Francisco, CA

    Seed to Series B · checks $2.77M–$8.35M (est.)

    Sector focus not yet verified

  • Polaris PartnersVC firm · Boston, MA

    Seed to Growth · checks $5M–$15M (est.)

    Biotech & PharmaHealthcareMedia, Gaming & CreatorFintech+1

  • PeakSpanVC firm · New York, NY

    Series A to Growth · checks $50K–$200K (est.)

    B2B SoftwareAI & ML

  • Smith Point CapitalVC firm · San Francisco, CA

    Series B, Growth · checks $4.5M–$13.5M (est.)

    AI & MLB2B SoftwareDeveloper Tools

  • DFJ GrowthVC firm · San Mateo, CA

    Seed to Growth

    AI & ML

  • Matter Venture PartnersVC firm · Los Altos, CA

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

    CybersecurityAI & ML

  • Third Rock VenturesVC firm · Boston, MA

    Series A to Growth · checks $7.5M–$22.5M (est.)

    Biotech & PharmaHealthcare

  • Overlook CapitalVC firm · Austin, TX

    Seed to Series B · checks $1M–$3M (est.)

    Deep TechFintech

  • Alpine Space VenturesVC firm · Los Angeles, CA

    Seed to Series B · checks $950K–$2.85M (est.)

    Space

  • Accelerator VenturesAccelerator · Jackson, WY

    Pre-seed to Series B · checks $400K–$1.05M (est.)

    Media, Gaming & CreatorB2B SoftwareE-commerce & RetailEducation

  • PlaygroundVC firm · Palo Alto, CA

    Seed to Series B · checks $4.75M–$14.3M (est.)

    Biotech & Pharma

  • Atlas VentureVC firm · Boston, MA

    Series B, Growth · checks $4M–$12M (est.)

    Biotech & Pharma

  • Transformation CapitalVC firm · Boston, MA

    Pre-seed, Series B · checks $150K–$450K (est.)

    HealthcareClimate & Energy

  • FirstMark CapitalVC firm · New York, NY

    Series A to Growth · checks $7.42M–$22.3M (est.)

    HealthcareInsurtechB2B SoftwareAI & ML

  • Evantic ChampionsVC firm · Beverly Hills, CA

    Series B

    CybersecurityBiotech & PharmaHealthcare

  • MarathonVC firm · Beverly Hills, CA

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

    Sector focus not yet verified

  • Blumberg CapitalVC firm · Sunny Isles Beach, FL

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

    HealthcareAI & ML

  • Hanabi CapitalVC firm · Palo Alto, CA

    Seed to Series B · checks $5M–$15M (est.)

    Sector focus not yet verified

  • Safar PartnersVC firm · Cambridge, MA

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

    HealthcareAI & MLIndustrial & ManufacturingClimate & Energy

  • WaverleyVC firm · Palo Alto, CA

    Pre-seed to Series B · checks $500K–$1.5M (est.)

    Climate & EnergyMedia, Gaming & CreatorAI & ML

  • Craft VenturesVC firm · San Francisco, CA

    Seed to Growth

    AI & MLCybersecurity

  • Enlightened Hospitality InvestmentsVC firm · New York, NY

    Series B · checks $3.25M–$9.75M (est.)

    Food & AgricultureConsumerInsurtech

  • Elephant PartnersVC firm · Boston, MA

    Series A to Growth · checks $7M–$21M (est.)

    B2B SoftwareE-commerce & RetailConsumer

  • Theory VenturesVC firm · Portola Valley, CA

    Seed to Series B · checks $1M–$3M (est.)

    AI & MLB2B SoftwareDeep Tech

  • PelionVC firm · Salt Lake City, UT

    Series A to Growth · checks $2.48M–$7.4M (est.)

    AI & MLCybersecurity

  • Picture CapitalVC firm · Oakland, NJ

    Seed to Series B · checks $4M–$12M (est.)

    Sector focus not yet verified

  • CRVVC firm · Palo Alto, CA

    Seed to Growth

    AI & MLCybersecurity