49 venture capital firms in Connecticut, including 43 in Fairfield County
We list 49 venture capital firms in Connecticut as of November 2026: each has an SEC filing on file, and the list was last checked on 6 Nov 2026. The cities with the most head offices on this list are Westport (13), Greenwich (11) and Stamford (9). 43 of the 49 are in Fairfield County, so this page is also our list of venture capital firms in Fairfield County.
Top 10 venture capital firms in Connecticut, 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 (50: full marks within 3 months, then stepping down at 6, 12 and 24 months), size of the fund on file on a log scale (35) and completeness of the public record (15). 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.
NSV
Type: VC firm · HQ: Greenwich, CT · Stages: Seed, Late stage · Focus: Healthtech, AI, Semiconductor, Mobility · Latest activity: Portfolio news, Oct 2026 · Private fund assets: $990M (SEC Form ADV)
Portfolio news dated Oct 2026; $990M on file (SEC Form ADV); backs seed, late stage; 5 named decision-makers on file.
Altai Ventures
Type: VC firm · HQ: Westport, CT · Stages: Seed, Series A · Focus: Insurtech, Fintech, AI, SaaS · Latest activity: New fund, Oct 2026 · Fund size on file: $100M (SEC Form D, 2025)
Latest fund filing dated Oct 2026; $100M fund on file (SEC Form D, 2025); backs seed, Series A; 8 named decision-makers on file.
Decisive Point VENTURES
Type: VC firm · HQ: Greenwich, CT · Focus: AI, Energy, Defense Tech, Robotics · Latest activity: New fund, Nov 2026 · Fund size on file: $60M (SEC Form D, 2023)
Latest fund filing dated Nov 2026; $60M fund on file (SEC Form D, 2023); 8 named decision-makers on file.
Tamarack Global
Type: VC firm · HQ: Greenwich, CT · Focus: Defense Tech, Energy, AI, Industrial Tech · Latest activity: New fund, Sep 2026 · Fund size on file: $50M (SEC Form D, 2025)
Latest fund filing dated Sep 2026; $50M fund on file (SEC Form D, 2025); 5 named decision-makers on file.
Samaritan Partners
Type: VC firm · HQ: Darien, CT · Stages: Seed · Focus: Impact, Healthtech · Latest activity: New fund, Aug 2026 · Fund size on file: $10M (SEC Form D, 2023)
Latest fund filing dated Aug 2026; $10M fund on file (SEC Form D, 2023); backs seed; 1 named decision-maker on file.
Fairview Private Markets
Type: Fund manager · HQ: West Hartford, CT · Latest activity: New fund, Aug 2026 · Fund size on file: $108M (SEC Form D, 2021)
Latest fund filing dated Aug 2026; $108M fund on file (SEC Form D, 2021); 8 named decision-makers on file.
Outsiders Fund
Type: VC firm · HQ: Norwalk, CT · Stages: Seed, Series A · Focus: AI, Cybersecurity, Industrial Tech, Mobility · Latest activity: New fund, Jan 2026 · Fund size on file: $150M (SEC Form D, 2025)
Latest fund filing dated Jan 2026; $150M fund on file (SEC Form D, 2025); backs seed, Series A; 8 named decision-makers on file.
Vesey Ventures
Type: VC firm · HQ: Westport, CT · Stages: Pre-seed, Seed, Series A · Focus: Fintech, AI, Cybersecurity, SaaS · Latest activity: New fund, May 2026 · Fund size on file: $77M (SEC Form D, 2021)
Latest fund filing dated May 2026; $77M fund on file (SEC Form D, 2021); backs pre-seed, seed, Series A; 3 named decision-makers on file.
Hash3
Type: VC firm · HQ: Ridgefield, CT · Stages: Pre-seed, Seed · Focus: Crypto and Web3, Fintech, AI, SaaS · Latest activity: New fund, Dec 2025 · Fund size on file: $28M (SEC Form D, 2022)
Latest fund filing dated Dec 2025; $28M fund on file (SEC Form D, 2022); backs pre-seed, seed; 2 named decision-makers on file.
Acadian Ventures
Type: VC firm · HQ: Madison, CT · Stages: Pre-seed, Seed, Series A · Focus: Future of Work, AI, SaaS · Latest activity: New fund, Sep 2025 · Fund size on file: $60M (SEC Form D, 2025)
Latest fund filing dated Sep 2025; $60M fund on file (SEC Form D, 2025); backs pre-seed, seed, Series A; 8 named decision-makers on file.
First 24 of 49 venture capital firms in Connecticut
| Investor | Type | HQ | Stagesour research | Focusour research | Latest fund or deal | Fund sizeas filed or stated | Checked | Contacts |
|---|---|---|---|---|---|---|---|---|
| NSV | VC firm | Greenwich, CT | Seed, Late stage | Healthtech, AI, Semiconductor, Mobility | Portfolio news, Oct 2026 | $990M (SEC Form ADV) | 5 Nov 2026 | 5 names · Unlock |
| Altai Ventures | VC firm | Westport, CT | Seed, Series A | Insurtech, Fintech, AI, SaaS | New fund, Oct 2026 | $100M (SEC Form D, 2025) | 4 Nov 2026 | 8 names · Unlock |
| Decisive Point VENTURES | VC firm | Greenwich, CT | AI, Energy, Defense Tech, Robotics | New fund, Nov 2026 | $60M (SEC Form D, 2023) | 4 Nov 2026 | 8 names, firm email · Unlock | |
| Tamarack Global | VC firm | Greenwich, CT | Defense Tech, Energy, AI, Industrial Tech | New fund, Sep 2026 | $50M (SEC Form D, 2025) | 4 Nov 2026 | 5 names · Unlock | |
| Samaritan Partners | VC firm | Darien, CT | Seed | Impact, Healthtech | New fund, Aug 2026 | $10M (SEC Form D, 2023) | 4 Nov 2026 | 1 name · Unlock |
| Fairview Private Markets | Fund manager | West Hartford, CT | New fund, Aug 2026 | $108M (SEC Form D, 2021) | 4 Nov 2026 | 8 names · Unlock | ||
| Outsiders Fund | VC firm | Norwalk, CT | Seed, Series A | AI, Cybersecurity, Industrial Tech, Mobility | New fund, Jan 2026 | $150M (SEC Form D, 2025) | 4 Nov 2026 | 8 names, firm email · Unlock |
| Vesey Ventures | VC firm | Westport, CT | Pre-seed, Seed, Series A | Fintech, AI, Cybersecurity, SaaS | New fund, May 2026 | $77M (SEC Form D, 2021) | 5 Nov 2026 | 3 names, firm email · Unlock |
| Hash3 | VC firm | Ridgefield, CT | Pre-seed, Seed | Crypto and Web3, Fintech, AI, SaaS | New fund, Dec 2025 | $28M (SEC Form D, 2022) | 4 Nov 2026 | 2 names, firm email · Unlock |
| Acadian Ventures | VC firm | Madison, CT | Pre-seed, Seed, Series A | Future of Work, AI, SaaS | New fund, Sep 2025 | $60M (SEC Form D, 2025) | 4 Nov 2026 | 8 names · Unlock |
| Mamba Growth | VC firm | Riverside, CT | Growth | New deal, Jul 2025 | $103M (SEC Form D, 2024) | 5 Nov 2026 | 1 name · Unlock | |
| Story Ventures | VC firm | Westport, CT | Pre-seed, Seed | Healthtech, AI, Fintech, Deep Tech | $455M (SEC Form ADV) | 5 Nov 2026 | 4 names, firm email · Unlock | |
| Regeneron Ventures | Corporate VC | Greenwich, CT | Healthtech, Biotech, Medtech | $479M (SEC Form ADV) | 5 Nov 2026 | firm email · Unlock | ||
| 6th Man Ventures | VC firm | Westport, CT | Seed, Series A | Crypto and Web3, Fintech, Developer Tools, AI | New deal, Jan 2026 | 4 Nov 2026 | 2 names, firm email · Unlock | |
| Red Beard Ventures | VC firm | Westport, CT | Seed | Crypto and Web3, Gaming, Media, Robotics | New fund, Sep 2025 | $26M (SEC Form D, 2022) | 4 Nov 2026 | 4 names · Unlock |
| OAK Management Corporation | VC firm | Wilton, CT | Growth, Any stage | Healthtech, Biotech, Fintech, Consumer | $117M (SEC Form ADV) | 5 Nov 2026 | 8 names · Unlock | |
| TF Technology Investments | VC firm | Trumbull, CT | AI, Developer Tools, Media, Energy | New fund, May 2025 | $12M (SEC Form D, 2025) | 5 Nov 2026 | 4 names · Unlock | |
| AF Ventures | VC firm | Greenwich, CT | Growth | Healthtech, Food and Beverage, Consumer, CPG | $119M (SEC Form ADV) | 5 Nov 2026 | firm email · Unlock | |
| Wheelhouse360 | VC firm | Stamford, CT | Logistics, Consumer, Media, Healthtech | $53M (SEC Form ADV) | 5 Nov 2026 | 4 names, firm email · Unlock | ||
| Max Ventures | VC firm | Old Greenwich, CT | Pre-seed, Seed | New fund, Sep 2024 | $50M (SEC Form D, 2023) | 5 Nov 2026 | 3 names · Unlock | |
| HighCape Capital | VC firm | Westport, CT | Growth | Biotech, Healthtech, Proptech, Medtech | $48M (SEC Form ADV) | 5 Nov 2026 | 7 names · Unlock | |
| M28Capital | VC firm | Stamford, CT | Healthtech, Biotech, Medtech | $113M (SEC Form ADV) | 5 Nov 2026 | No contact on file | ||
| Interactive Venture Partners | Corporate VC | Greenwich, CT | Pre-seed, Seed, Series A | AI, Healthtech, Generalist, SaaS | $20M (SEC Form ADV) | 5 Nov 2026 | 5 names, firm email · Unlock | |
| Oak HC/FT | VC firm | Stamford, CT | Seed, Series A, Series B, Growth | Fintech, Healthtech, AI, Insurtech | New fund, Jul 2025 | 4 Nov 2026 | 5 names, firm email · Unlock |
You are seeing 24 of 49. The full list adds 25 more firms and 144 named decision-makers.
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43 venture capital firms in Fairfield County
16 of the 43 have a fund filing or a dated deal in the last 12 months; the median fund size on file is $50M (SEC Form D, 22 firms); the most recent fund filings are from Decisive Point VENTURES (Nov 2026), Altai Ventures (Oct 2026) and Tamarack Global (Sep 2026); of the 22 with a stage on file, seed (15), growth-stage (8) and Series A (6); the count covers the metro area, by city: Westport (13), Greenwich (11) and Stamford (9); the paid file holds 121 named decision-makers for them.
The first 5 in list order: NSV, Altai Ventures, Decisive Point VENTURES, Tamarack Global and Samaritan Partners. They are ranked with the rest of the list, by the same rule.
How these 49 break down
By city
| City | On this list | Share |
|---|---|---|
| Westport | 13 | 27% |
| Greenwich | 11 | 22% |
| Stamford | 9 | 18% |
| Darien | 2 | 4% |
| Norwalk | 2 | 4% |
| Wilton | 2 | 4% |
By stage
| Stage | On this list | Share |
|---|---|---|
| Pre-Seed | 7 | 14% |
| Seed | 16 | 33% |
| Series A | 7 | 14% |
| Growth | 8 | 16% |
Stage is our research. A firm can back more than one stage.
Full lists, each with its own row count: Seed investors in Connecticut (17)
By sector
| Sector | On this list | Share |
|---|---|---|
| AI | 16 | 33% |
| SaaS | 16 | 33% |
| Healthtech | 15 | 31% |
| Fintech | 10 | 20% |
| Biotech | 7 | 14% |
| Deep Tech | 6 | 12% |
| Medtech | 6 | 12% |
| Consumer | 5 | 10% |
| Energy | 4 | 8% |
| Crypto and Web3 | 4 | 8% |
| Media | 4 | 8% |
| Mobility | 3 | 6% |
Sector is our research. A firm can carry more than one sector.
Full lists, each with its own row count: AI investors in Connecticut (17)SaaS investors in Connecticut (17)Healthtech investors in Connecticut (16)
By type
| Type | On this list | Share |
|---|---|---|
| VC firm | 46 | 94% |
| Corporate VC | 2 | 4% |
Method and limits
- Source
- All 49 rows carry an SEC filing (Form D or Form ADV). 33 of the 49 have a website we checked; the other 16 rest on the filing or register entry alone. 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. This list holds VC firms, fund managers and corporate venture arms; accelerators and angel networks are in their own lists. Place: head office in Connecticut.
- Order
- Firms with a published profile come first. Activity score out of 100: recency of the latest fund filing or dated deal (50: full marks within 3 months, then stepping down at 6, 12 and 24 months), size of the fund on file on a log scale (35) and completeness of the public record (15). 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 6 Nov 2026.
- Fill rates
- Of 49 rows: stage 23, sector 27, fund size 43, website 33. In the paid file: named decision-makers on 37 rows, firm email on 13, LinkedIn page on 11, check size on 3.
- Corrections
- Email [email protected] or use the update form. We act within 5 working days.
Questions
How many VC firms are in Connecticut?
We list 49 as of November 2026. 18 of the 49 have a fund filing or a dated deal in the last 12 months. By type: VC firm (46), Corporate VC (2) and Fund manager (1).
Which cities in Connecticut have the most VC firms?
Westport (13), Greenwich (11) and Stamford (9).
Which Connecticut VC funds filed with the SEC in the last 12 months?
15 of the 49 have a fund filing dated in the last 12 months. The most recent on this list are Decisive Point VENTURES (Nov 2026), Altai Ventures (Oct 2026) and Tamarack Global (Sep 2026).
What stages do venture capital firms in Connecticut back?
Of the 23 with a stage on file, seed (16), growth-stage (8) and pre-seed (7). A firm can back more than one stage, and 26 rows have no stage on file yet.
Where does the data on venture capital firms in Connecticut come from and how often is it updated?
All 49 rows have an SEC filing on file (Form D or Form ADV). 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 6 Nov 2026 at the latest. The whole file is re-verified twice a year.
Can I download the list of venture capital firms in Connecticut as a spreadsheet?
Yes. The file holds all 49 rows in Excel and CSV, with 144 named decision-makers and 13 firm emails, for $49 one-time. 24 rows are free on this page.
Broader lists
Narrower lists
Seed investors in Connecticut (17)AI investors in Connecticut (17)SaaS investors in Connecticut (17)Healthtech investors in Connecticut (16)
Related lists
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