41 Series B deep tech investors in the US
We list 41 Series B deep tech investors in the US as of November 2026: 39 have an SEC filing on file and 2 were checked on the firm's own website or an official register, and the list was last checked on 7 Nov 2026. The cities with the most head offices on this list are San Francisco (5), New York (5) and Palo Alto (4).
Top 5 Series B deep tech investors in the US, ranked by recent fund activity
Among firms with a published profile and a dated fund or deal in the last 24 months. The rule: Activity score out of 100: recency of the latest fund filing or dated deal (30: full marks within 3 months, then stepping down at 6, 12 and 24 months), share of the observed portfolio in this sector (20; half of that when the sector is stated only), stage focus (15: all of it when Series B is the only stage the firm states, split evenly when it states more), stated focus on the US (15: full marks when the firm names the US as where it invests, half when it says global), size of the fund on file on a log scale (12) and completeness of the public record (8). Stage and regional focus are our research, not an SEC figure. It is a measure of activity and fit, not of quality or returns. The same rule orders the whole list; it is repeated in the method box.
Madrona
Type: VC firm · HQ: Seattle, WA · Stages: Pre-seed, Seed, Series A, Series B, Growth · Focus: Deep Tech, AI, Biotech, Consumer · Latest activity: New deal, Oct 2026 · Fund size on file: $490M (SEC Form D, 2025)
Dated new deal in Oct 2026; $490M fund on file (SEC Form D, 2025); states deep tech as a focus; backs pre-seed, seed, Series A; names the US as where it invests; 8 named decision-makers on file.
Energy Impact Partners
Type: VC firm · HQ: United States (London office) · Stages: Seed, Series A, Series B, Growth · Focus: Deep Tech, Energy, Climate Tech, AI · Latest activity: Portfolio news, Nov 2026 · Fund size or assets: $4.5B (own site)
Portfolio news dated Nov 2026; $4.5B on file (own site); 10% of its observed portfolio is deep tech; backs seed, Series A, Series B; names the US as where it invests; 8 named decision-makers on file.
Bison Ventures
Type: VC firm · HQ: San Francisco, CA · Stages: Pre-seed, Seed, Series A, Series B · Focus: Deep Tech, AI, Healthtech, Energy · Latest activity: New fund, Oct 2026 · Fund size on file: $160M (SEC Form D, 2025)
Latest fund filing dated Oct 2026; $160M fund on file (SEC Form D, 2025); 8% of its observed portfolio is deep tech; backs pre-seed, seed, Series A; names the US as where it invests; 2 named decision-makers on file.
Massive VC
Type: VC firm · HQ: Boulder, CO · Stages: Seed, Series A, Series B · Focus: Deep Tech, Space, AI, Energy · Latest activity: New fund, May 2026 · Fund size on file: $30M (SEC Form D, 2026)
Latest fund filing dated May 2026; $30M fund on file (SEC Form D, 2026); 26% of its observed portfolio is deep tech; backs seed, Series A, Series B; names the US as where it invests; 3 named decision-makers on file.
Autotech Ventures
Type: VC firm · HQ: Menlo Park, CA · Stages: Pre-seed, Seed, Series A, Series B · Focus: Deep Tech, Mobility, AI, Logistics · Latest activity: New fund, Aug 2026 · Fund size on file: $25M (SEC Form D, 2026)
Latest fund filing dated Aug 2026; $25M fund on file (SEC Form D, 2026); 7% of its observed portfolio is deep tech; backs pre-seed, seed, Series A; names the US as where it invests; 8 named decision-makers on file.
First 20 of 41 Series B deep tech investors in the US
| Investor | Type | HQ | Stagesour research | Focusour research | Latest fund or deal | Fund sizeas filed or stated | Checked | Contacts |
|---|---|---|---|---|---|---|---|---|
| Madrona | VC firm | Seattle, WA | Pre-seed, Seed, Series A, Series B, Growth | Deep Tech, AI, Biotech, Consumer | New deal, Oct 2026 | $490M (SEC Form D, 2025) | 5 Nov 2026 | 8 names · Unlock |
| Energy Impact Partners | VC firm | United States (London office) | Seed, Series A, Series B, Growth | Deep Tech, Energy, Climate Tech, AI | Portfolio news, Nov 2026 | $4.5B (own site) | 5 Nov 2026 | 8 names · Unlock |
| Bison Ventures | VC firm | San Francisco, CA | Pre-seed, Seed, Series A, Series B | Deep Tech, AI, Healthtech, Energy | New fund, Oct 2026 | $160M (SEC Form D, 2025) | 4 Nov 2026 | 2 names, firm email · Unlock |
| Massive VC | VC firm | Boulder, CO | Seed, Series A, Series B | Deep Tech, Space, AI, Energy | New fund, May 2026 | $30M (SEC Form D, 2026) | 4 Nov 2026 | 3 names · Unlock |
| Autotech Ventures | VC firm | Menlo Park, CA | Pre-seed, Seed, Series A, Series B | Deep Tech, Mobility, AI, Logistics | New fund, Aug 2026 | $25M (SEC Form D, 2026) | 4 Nov 2026 | 8 names · Unlock |
| Earthshot Ventures | VC firm | San Francisco, CA | Pre-seed, Seed, Series A, Series B | Deep Tech, AI, Energy, Industrial Tech | New fund, Oct 2026 | $77M (SEC Form D, 2026) | 4 Nov 2026 | 8 names, firm email · Unlock |
| Geodesic | VC firm | Foster City, CA | Series B, Any stage | Deep Tech, AI, Developer Tools, Fintech | New deal, Oct 2026 | $500M (SEC Form D, 2021) | 5 Nov 2026 | 8 names, firm email · Unlock |
| Cerberus Ventures | VC firm | New York, NY | Pre-seed, Seed, Series A, Series B | Deep Tech, AI, Industrial Tech, Quantum | New fund, Jun 2026 | $75M (SEC Form D, 2024) | 4 Nov 2026 | 8 names · Unlock |
| Access Ventures | VC firm | New York, NY | Series B, Growth, Late stage | Deep Tech, AI, Generalist, SaaS | New fund, Aug 2026 | $6M (SEC Form D, 2026) | 4 Nov 2026 | 2 names · Unlock |
| Liquid 2 Ventures | VC firm | San Francisco, CA | Pre-seed, Seed, Series B, Growth | Deep Tech, AI, Mobility, SaaS | New fund, Aug 2026 | $200M (SEC Form D, 2026) | 4 Nov 2026 | 8 names, firm email · Unlock |
| Infinite | VC firm | West Palm Beach, FL | Pre-seed, Seed, Series A, Series B, Growth | Deep Tech, AI, Energy, Crypto and Web3 | New fund, Oct 2026 | $100M (SEC Form D, 2026) | 5 Nov 2026 | 6 names · Unlock |
| Greenfield Partners | VC firm | New York, NY | Series A, Series B, Growth | Deep Tech, AI, Cybersecurity, Fintech | New fund, Jul 2026 | 4 Nov 2026 | 8 names · Unlock | |
| Calculus VC | VC firm | Foster City, CA | Series A, Series B | Deep Tech, AI, Healthtech, Industrial Tech | New deal, Aug 2026 | $1M (SEC Form D, 2025) | 4 Nov 2026 | 1 name, firm email · Unlock |
| Overlap Holdings | VC firm | Hicksville, NY | Seed, Series A, Series B | Deep Tech, AI, Energy, Climate Tech | New fund, Oct 2026 | $16M (SEC Form D, 2023) | 4 Nov 2026 | 8 names · Unlock |
| Paladin Capital Group | VC firm | Washington | Series A, Series B, Growth | Deep Tech, Cybersecurity, AI, Healthtech | Portfolio news, Oct 2026 | 7 Nov 2026 | 5 names · Unlock | |
| Angelsdeck | VC firm | Sacramento, CA | Seed, Series A, Series B | Deep Tech, Fintech, AI, Healthtech | Portfolio news, Jan 2026 | $33M (SEC Form ADV) | 5 Nov 2026 | LinkedIn page · Unlock |
| Celesta Capital | VC firm | San Mateo, CA | Seed, Series A, Series B | Deep Tech, AI, Healthtech, Biotech | New fund, Sep 2025 | $102M (SEC Form D, 2024) | 4 Nov 2026 | 8 names, firm email · Unlock |
| Denver Angels | VC firm | Denver, CO | Pre-seed, Seed, Series A, Series B, Growth | Deep Tech, AI, Logistics, Legal Tech | New deal, Apr 2026 | $202k (SEC Form D, 2023) | 5 Nov 2026 | 8 names · Unlock |
| OUP | VC firm | Bala Cynwyd, PA | Pre-seed, Seed, Series A, Series B, Growth, Any stage | Deep Tech, Biotech, Healthtech, Climate Tech | $785M (SEC Form ADV) | 5 Nov 2026 | 8 names, firm email · Unlock | |
| Carat Partners | VC firm | Old Tappan, NJ | Seed, Series A, Series B | Deep Tech, Energy, AI, Space | New fund, Oct 2025 | $350M (SEC Form D, 2023) | 4 Nov 2026 | 7 names, firm email · Unlock |
You are seeing 20 of 41. The full list adds 21 more investors and 221 named decision-makers.
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How these 41 break down
By US state
| US state | On this list | Share |
|---|---|---|
| California | 18 | 44% |
| New York | 6 | 15% |
| Colorado | 3 | 7% |
| Florida | 2 | 5% |
| Illinois | 2 | 5% |
Method and limits
- Source
- 39 of the 41 rows carry an SEC filing (Form D or Form ADV). All 41 have a website we checked. Filing date and fund size are SEC data where a filing exists. Stage, sector and check size are our research.
- Inclusion rule
- Organizations that back startups. Individuals, buyout funds and firms we found to be inactive are left out. Sector: the firm states deep tech as a focus on its own site, or we observed it in the firm's portfolio. Stage: the firm states that it invests at Series B.
- Order
- Firms with a published profile come first. Activity score out of 100: recency of the latest fund filing or dated deal (30: full marks within 3 months, then stepping down at 6, 12 and 24 months), share of the observed portfolio in this sector (20; half of that when the sector is stated only), stage focus (15: all of it when Series B is the only stage the firm states, split evenly when it states more), stated focus on the US (15: full marks when the firm names the US as where it invests, half when it says global), size of the fund on file on a log scale (12) and completeness of the public record (8). Stage and regional focus are our research, not an SEC figure. It is a measure of activity and fit, not of quality or returns.
- Last refreshed
- November 2026. Rows on this list were checked between 4 Nov 2026 and 7 Nov 2026.
- Fill rates
- Of 41 rows: stage 41, sector 41, fund size 35, website 41. In the paid file: named decision-makers on 35 rows, firm email on 15, LinkedIn page on 25, check size on 7.
- Corrections
- Email [email protected] or use the update form. We act within 5 working days.
Questions
How many Series B deep tech investors in the US are there?
We list 41 as of November 2026. 26 of the 41 have a fund filing or a dated deal in the last 12 months. The cities with the most are San Francisco (5), New York (5) and Palo Alto (4).
Which Series B deep tech investors in the US raised a new fund in the last 12 months?
16 of the 41 have a fund filing dated in the last 12 months. The most recent on this list are Bison Ventures (Oct 2026), Overlap Holdings (Oct 2026) and Earthshot Ventures (Oct 2026).
What is the typical fund size of Series B deep tech investors in the US?
The median fund size on file for this list is $75M, across the 25 firms with a size on an SEC Form D. The fund on file is each firm's main fund, which is not always its newest. The other 16 do not disclose a size there.
How do I contact Series B deep tech investors in the US?
The paid file holds 221 named decision-makers across 35 of these 41 and a firm email for 15. We publish the address a firm lists itself, never a personal email. Each free row links to a profile with the firm's website.
Where does the data on Series B deep tech investors in the US come from?
39 of the 41 rows have an SEC filing on file (Form D or Form ADV) and 2 were checked on the firm's own website or an official register. Filing date and fund size come from the filing. Stage, sector and check size are our research. Rows on this list were last checked on 7 Nov 2026 at the latest. The whole file is re-verified twice a year.
Broader lists
Deep tech venture capital firms in the US (322)Series B investors in the US (165)Series B deep tech investors (113)
Related lists
Seed deep tech investors in the US (205)Series B AI investors in the US (126)Pre-seed deep tech investors in the US (114)Series B SaaS investors in the US (108)Series A deep tech investors in the US (73)Series B healthtech investors in the US (69)Series B fintech investors in the US (59)Growth-stage deep tech investors in the US (43)Series B cybersecurity investors in the US (37)Series B medtech investors in the US (36)Series B biotech investors in the US (34)Series B energy investors in the US (29)Series B industrial tech investors in the US (29)Series B consumer investors in the US (29)Series B hardware investors in the US (28)Series B B2B investors in the US (27)Series B climate tech investors in the US (27)Series B developer tools investors in the US (21)
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