Greenfield Partners

Venture capital firm

Strategy

Geographies
Greenwich, Connecticut, USA

Recent changes

  1. Jun 25, 2026Invested in Patronus AI (Series B, $50M) TechCrunch
  2. May 19, 2026New fund: Greenfield Partners Fund IV SEC EDGAR Form D

Funds

1
FundVintageSizeStrategySource
Greenfield Partners Fund IV2026—Flagship
As of May 19, 2026SEC EDGAR Form D

Portfolio

2 total

Recent Investment Activity

2

Track record: led 1 and participated in 0 of 1 tracked venture round · 1 in the last 12 months · led 1 Series B

DateCompanyEventRoleAmountValuationInvestorsSource
Oct 5, 2026RobCosecondaryParticipated$40M$1B
Sequoia CapitalLeadunverifiedLightspeed Venture PartnersLeadunverifiedGreenfield PartnersunverifiedKindred VenturesunverifiedLingotto Investment ManagementunverifiedPromus VenturesunverifiedCherry VenturesEuropean Tech Collective
Tech Funding News
Jun 25, 2026Patronus AISeries BLed$50M—Pulse story

Sector / Stage Activity

By sector (portfolio)
AI infra
1 · 50%
Robotics
1 · 50%

Co-Investors

7

Similar Firms

overlapping sector, stage or region

Latest Pulse

  1. Patronus AI Lands $50M to Build Digital Worlds That Stress-Test AI AgentsPatronus AI raised a $50 million Series B led by Greenfield Partners, with Lightspeed, Notable Capital, Datadog and Samsung participating, bringing total funding to $70 million. The startup builds simulated digital environments -- replicas of websites and internal systems -- where AI agents are stress-tested before deployment, and counts nearly all frontier labs among its customers after 15x revenue growth.→

Greenfield Partners FAQ

What companies has Greenfield Partners invested in?

Greenfield Partners' portfolio includes RobCo, Patronus AI.

Who does Greenfield Partners co-invest with most?

In the rounds Value Add tracks, Greenfield Partners most often invests alongside Lightspeed Venture Partners (2 shared deals), Datadog (1 shared deal), Kindred Ventures (1 shared deal), Lingotto Investment Management (1 shared deal), Notable Capital (1 shared deal).

Sources & methodologyshow
Where these figures come from

Figures are labelled Reported (a source states it), Estimated, Derived (computed from other facts) or Rumored (in talks / unconfirmed). Rumors never replace a confirmed figure. Each figure keeps its own as-of date; history is preserved rather than overwritten.

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