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.406 Ventures Fund

Boston, MA · Invests in US · Website

Check size

$1M-$5M

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Thesis

Only invest where we have a true unfair advantage. Partner with founders in healthcare, data+AI, and cybersecurity to build category-defining powerhouses. We deliver value far beyond capital through deep domain expertise and extensive networks.

Likely not a fit for

No spray-and-pray investing. No generalist approach. No companies outside healthcare, data/AI, or cybersecurity without clear fit.

How they invest

Lead or follow
Usually leads
Typical decision
~2 weeks
Warm intro
Preferred
Involvement
Takes a board seat
Fund status
Actively deploying
Decision process
Partnership vote

Partners & team

6 contacts on file

GB

Graham Brooks

Partner · Primary contact

RR

Rebecca Redfield

Partner

LD

Liam Donohue

Co-Founder and Managing Partner

PA

Payal Agrawal Divakaran

Partner

GD

Greg Dracon

Partner

KT

Kathryn Taylor Reddy

Principal

Portfolio

Abacus InsightsHealthcare Digital

Abacus Insights manages healthcare data by breaking down data silos to make a real impact for our customers. Our platform standardizes data across the healthcare ecosystem by providing a highly secure unified data infrastructure that minimizes change management and maximizes analytics enablement to reduce costs and improve outcomes.

AristaMDHealthcare Digital

AristaMD is a technology-enabled clinical services provider that connects primary care physicians with specialists to improve access to specialty care and enhance patient outcomes while reducing costs.

AscellusHealthcare Digital

Ascellus provides work-focused cognitive behavioral therapy and behavioral health care services to support recovering workers in overcoming emotional distress and psychosocial factors that hinder recovery.

Better Life PartnersHealthcare Digital

Better Life Partners provides addiction treatment services, including medication-assisted treatment, group therapy, and mental health support, focusing on helping individuals overcome substance use disorders.

BobsledDeveloper Tools Infra

Bobsled is a modern data fulfillment platform that helps teams share, deliver, and customize datasets across clouds, regions, and tools—without the complexity of traditional pipelines.

Business Intelligence AdvisorsEnterprise Software

Business Intelligence Advisors (BIA) provides a range of services including professional development, expert analyst research, automated research, advisory services, due diligence, and special projects, focusing on markets such as public equity and private equity.

ChaosSearchEnterprise Software

ChaosSearch provides a platform for live analytics on streaming data at scale, enabling users to optimize their data stacks and replace traditional log analytics solutions.

ClosedLoopHealthcare Digital

ClosedLoop is an AI-powered analytics platform focused on improving health outcomes through predictive analytics tailored for various healthcare stakeholders including providers, payers, and life sciences.

Cortica CareHealthcare Digital

Cortica Care provides expert, all-in-one care for children with autism and developmental differences, including ABA therapy, medical services, and family support.

Diana HealthHealthcare Digital

Comprehensive Women’s Healthcare | In-Person & Virtual Care

EquipHealthcare Digital

Equip is transforming the landscape of eating disorder treatment with a 100% virtual, evidence-based treatment model designed to achieve full recovery for everyone affected by an eating disorder.

Genesis ComputingEnterprise Software

Genesis Computing delivers AI data agents with advanced built-in skills to automate critical data workflows, enhancing the data lifecycle and employee experiences in complex industries.

Recent activity

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Research briefRead more
.406 Ventures Fund Research Investment Thesis and Philosophy .406 Ventures models its investing philosophy after Ted Williams' legendary .406 batting average, believing that they should only swing at deals where they have a true unfair advantage rather than chasing every opportunity. The firm is selective and domain-focused, leveraging deep industry expertise and extensive networks to partner with early-stage companies in carefully chosen sectors. The firm emphasizes that they deliver value far beyond capital. With over 100 years of collective experience as founders, operators, and investors, the team understands the challenges of building companies and provides hands-on partnership, particularly during seed and Series A rounds when they can materially impact growth trajectories. Investment Focus Areas .406 Ventures invests across three primary sectors with deep, domain-specific expertise: Healthcare From disrupting care delivery to leveraging technology, the US healthcare system is desperate for new ideas that .406 is helping bring to life. The firm has a portfolio spanning virtual care, mental health, behavioral health, value-based care models, and healthcare data/interoperability. They focus on companies addressing systemic inefficiencies in healthcare delivery, payment structures, and care coordination. Data + AI AI is redefining the boundaries of human potential, transforming how we create, execute, and disrupt. .406 invests in builders accelerating this seismic shift in intelligence. This includes data infrastructure, AI/ML platforms, LLM applications, data management, analytics, and agentic AI solutions. Cybersecurity Protecting the digital world from continually evolving threats is critical. .406 invests in innovators keeping businesses secure, resilient, and one step ahead. This spans identity and access management, application security, threat detection, and emerging AI-powered security solutions. Stage Focus and Check Size .406 Ventures is laser-focused on early-stage investments where they can provide the most partnership value: Primary Focus: Seed and Series A rounds Stage Philosophy: They excel at being the first institutional investor and leading or co-leading rounds Check Size Inference: Based on portfolio analysis, typical checks range from $1M-$5M at seed stage with participation in Series A follow-ons Fund Size: Recent fund deployments suggest multi-hundred million dollar funds with capacity for significant checks Lead Tendency .406 Ventures demonstrates a strong lead tendency. Across their portfolio, the firm frequently leads seed and Series A rounds, particularly in healthcare where they have deep domain expertise and operational networks. They co-lead when appropriate and participate in later-stage follow-ons for existing portfolio companies. Recent Activity and Fund Status The firm is actively deploying capital from recent funds: Notable Recent Investments (2025-2026): Portfolio companies like Genesis Computing (agentic AI data engineer), Mindgard (AI security testing), and Promethium (data fabric with agentic AI) reflect recent deployment activity Latest Investments: Additions to healthcare portfolio (Diana Health for women's health, OncoveryCare for cancer survivorship) and emerging AI companies Fund Status: Actively deploying, with strong momentum in early-stage healthcare and AI infrastructure Portfolio and Exits .406 has built an impressive portfolio over nearly 20 years with numerous successful exits: Notable Exits: Iora Health (full-risk primary care model, acquired by One Medical) AbleTo (virtual mental health intervention, acquired by Optum) Corvus (AI-powered cyber insurance, acquired by Travelers) AuthAir (authentication solutions, acquired by LogMeIn) Carbon Black (advanced threat protection, acquired by VMware) Active Portfolio: 80+ active companies spanning healthcare, data+AI, and cybersecurity. Several have achieved significant scale with $50M+ ARR. Team .406 Ventures has a dedicated, experienced team with deep domain expertise. Leadership includes Liam Donohue (Co-Founder, 30+ years as venture investor and founder, $405M+ invested), Graham Brooks, Payal Agrawal Divakaran, and Greg Dracon as Partners. Investment team includes Kathryn Taylor Reddy and Kevin Wang as Principals, with strong operational support infrastructure. Investment Approach The firm's approach centers on: Selectivity: Only investing where they have unfair advantage (the .406 metaphor) Partnership: "Our team becomes an extension of yours" Patience: Support companies throughout lifecycles Domain Depth: Deep networks in healthcare, data/AI, cybersecurity Founder-Centric: People and teams are critical beyond capital Competitive Differentiation Domain expertise in three carefully chosen sectors Operational network with 100+ years collective founder/operator experience plus 22+ Executives in Residence Patient capital from multi-hundred million funds 20-year track record with strong exits Relationship-oriented approach Company-creation platform capability

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