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5 Series B Deep Tech investors in San Francisco

As of August 10, 2026, DryPowder lists 5 Series B Deep Tech venture funds in San Francisco. None of the 5 publishes a check size yet. None has filed a verified SEC Form D in the last 90 days.

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Which Series B Deep Tech funds in San Francisco are writing checks right now?

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funds listed
5
filed an SEC Form D in the last 90 days
0
last updated, 2026
Aug 10

All 5 Series B Deep Tech funds in San Francisco

  1. AgFunder
    SeedSeries ASeries B

    Investing in deeptech and foundational technologies that remove structural constraints to sustainable scale in food, agriculture, and planetary…

    Partners not yet listed
  2. Ironfire Ventures
    SeedSeries ASeries B

    Invest in startups from seed to Series B across Artificial Intelligence, Lifestyle consumption upgrades, and Frontier Technology, partnering with…

    Partners not yet listed
  3. Maven Ventures
    SeedSeries ASeries B

    Invest in technical founders building software that will improve millions of consumers' lives. Back bold founders with a vision worth fighting for.

    Partners not yet listed
  4. Bain Capital Ventures
    SeedSeries ASeries BGrowth

    Use tightly focused expertise and an unparalleled global network to help founders realize their potential across all stages, from incubation to…

    Partners not yet listed
  5. Piva Capital
    SeedSeries ASeries B

    Piva Capital invests in people, companies, and breakthrough technologies at the inflection of scientific breakthrough and mass market impact to usher…

    Partners not yet listed

How this list is built

DryPowder lists every fund with a public profile tagged Series B and Deep Tech and headquartered in San Francisco. Funds whose largest published check is $5M or less come first; inside each group, funds with a verified SEC Form D in the last 30 days lead, then profile quality decides. Form D dates come from SEC EDGAR, and SPV and single-deal filings are dropped. Check sizes are what each fund publishes; the median uses only the 0 funds that publish one.

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Frequently asked questions

How many Series B Deep Tech VCs in San Francisco are there?

As of August 10, 2026, DryPowder lists 5 Series B Deep Tech venture funds in San Francisco with a public profile. The first 5 on this page are AgFunder, Ironfire Ventures, Maven Ventures, Bain Capital Ventures and Piva Capital.

Which Series B Deep Tech VCs in San Francisco are actively investing right now?

None of the 5 filed a verified SEC Form D in the last 90 days. A Form D is filed when a fund starts raising; SPVs and single-deal vehicles are not counted.

How does DryPowder build this list?

A fund is listed when its public profile is tagged Series B and Deep Tech and its headquarters is San Francisco. Funds whose largest published check is $5M or less come first; within each group, funds that filed a Form D in the last 30 days lead, then profile quality decides. Form D dates come from SEC EDGAR, with SPVs excluded. Data as of August 10, 2026.

Sources

Updated