Startup & Investor Directory

Arcturus

Developing carbon-infused copper and aluminum conductors for improved electrical performance.

Aresmgmt

Global alternative investment manager; new Opportunistic Credit strategy raised $9.8B+ including $8.3B+ Ares Special Opportunities Fund III; $17B+ deployed since inception

Arianetworks

AI-native networking with Deep Networking architecture for large-scale compute; microsecond telemetry and probabilistic decisions for AI clusters scaling to 100K+ GPUs

Arinna

Ultralight transition metal dichalcogenide solar panels for spacecraft; targeting on-orbit hardware before end of 2026; Stanford founders

Arize AI

AI observability and evaluation platform

Arkenstone Defense

Building operational infrastructure for commercial technology companies seeking to sell into the U.S. federal government.

Arkeus

Building AI-powered sensing systems for autonomous defense platforms.

Arm

Arm powers smartphones, cloud infrastructure, automotive systems, and AI compute.

Armada

Building modular AI infrastructure for edge computing.

Armadin

Agentic attacker swarm platform with custom AI models for 24/7 enterprise red-teaming; founded by Mandiant CEO Kevin Mandia; 60+ employees in first 6 months and Fortune 100 relationships

Armorcode

Unified exposure management platform processing 200B+ findings/year across hundreds of integrations; Anya framework powers Agentic AI Platform for AI agents, shadow AI apps, MCP servers; cumulative $81M

Arpio

A cloud disaster recovery and cyber resilience company.

Array Ventures

Array Ventures backs AI, data, and enterprise software startups at the pre-seed and seed stages.

ARTAN Bio

Developing engineered suppressor tRNA therapies for diseases caused by nonsense mutations.

Artemispower

AI platform for distributed energy contractors (formerly Monalee, originally vertically integrated solar/battery installer 2019): design, proposals, financing, contracts; 27x growth in 9 months; 100+ installers; partners GoodLeap, Dynamic SLR (72% cost reduction)

Artemissecurity

AI-native security platform building per-customer dynamic models across users, machines, cloud workloads, and applications to reconstruct attack narratives

Artinenergy

Renewable infrastructure platform: utility-scale solar, battery storage, green hydrogen, e-methanol; 56 operational solar plants and ~$2.7B contract base; ~$4B late-stage US pipeline (TX, NE)

Artis

AI-powered brand management and digital presence services for high-end residential design and construction professionals.

Arvinas

PROTAC protein degradation pharma; clinical-stage Nasdaq-listed; ABO/lead programs in liver, CNS including ALS; partnerships incl Pfizer

Arycs-tech

Coherent optical connectivity for AI infrastructure: silicon photonics plus coherent DSP optimized for bandwidth-per-watt and predictable latency in data centers

Aryon Security

Aryon Security is a cloud security company building a preventive enforcement platform for enterprise cloud environments.

Ascend-cp

Cross-border early-stage VC for medtech, mobility, deep tech with offices in US, UK, Luxembourg, Beijing, Singapore; cumulative $1.361B+ across Fund I ($570M deployed) + Fund II ($791M oversubscribed); >$100M returns and top quartile performance

Ascendia Autism Care

Clinician-led autism services platform

Aseon Labs

Building robotic micro-depots for robotaxi fleets

Askchapter

AI-native Medicare navigation platform evaluating plans across every U.S. zip code; less than a year after $75M Series D, doubled valuation

Assort Health

Healthcare AI company that develops AI agents for scheduling, intake, referrals, payments, patient engagement, and healthcare workflow automation.

Assured

Building AI-native infrastructure for healthcare provider operations