How many investments has Grey Street Partners made?

Grey Street Partners has 8 tracked investments.

What stage does Grey Street Partners invest at?

Grey Street Partners invests at the Seed, Growth stages.

What is Grey Street Partners's typical check size?

Grey Street Partners typically writes checks of $50K.

What sectors does Grey Street Partners focus on?

Grey Street Partners focuses on AdTech, Advanced Manufacturing, AI & Machine Learning, Biotech, Climate Tech, Cloud Computing, Consumer, Crypto & Web3, Cybersecurity, E-commerce, EdTech, Energy, Enterprise Software, Fintech, Gaming, Healthtech, IoT, Medical Devices, Mobility & Transportation, PropTech, Quantum Computing, Robotics, SaaS, Semiconductors, Space Tech.

Where is Grey Street Partners located?

Grey Street Partners is headquartered in Melbourne, AU.

Grey Street Partners

Institutional investor

Melbourne · Seed–Growth · 7 people tracked

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Investment thesis

Grey Street Partners invests in listed companies positioned for long-term, secular growth, operating on the principle that earnings growth (driven by revenue, margin, and free cash flow expansion) is the primary long-term driver of share prices. The firm uses an active, fundamental bottom-up stock selection process, assessing financial health, management quality, competitive positioning, growth catalysts, and valuation to find quality, undervalued businesses regardless of economic conditions. It emphasizes capital preservation over short-term volatility, adopts a business-owner mindset with deep management engagement and rigorous due diligence, and runs a high-conviction portfolio of a smaller number of well-understood positions.

Source: firm website, verified Oct 2, 2026.

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Stage

Seed–Growth

Check

$50K

Melbourne, AU

Instruments

Equity

Tracked investments

Team · 7 people

from the firm's website & public directories

Daniel Reaper· Founding Partner & Portfolio Manager

Brings nearly a decade in Private Wealth and Funds Management, focusing on disruptive, structurally growing businesses across GSP's thematic areas. Holds a Business degree in Economics and Finance and an MBA.

Huw Davies· Founding Partner & Portfolio Manager

Has over 20 years in financial services, including roles at HSBC and Deutsche Bank, specializing in green energy transition, digital transformation, consumer trends, and healthcare. Holds a Master of Banking & Finance and a Professional Diploma in Stockbroking.

Christopher Ryan· Investment Committee Member

A financial services executive with over 40 years in Asia-Pacific, having held senior roles at MSCI, Perpetual, Fidelity International, ING, and HSBC. He founded First Harbour Capital Partners in Hong Kong and co-founded the DigFin media platform.

David Wylie· Investment Committee Member

Has over 20 years in equity markets, brokerage, and institutional distribution, including as CEO of Lonsec Stockbroking and co-head of wholesale broking at Ord Minnett. He now leads AWAG Portfolio Services as Managing Director.

Julian Mitchell· Investment Committee Member

An investment manager with over 35 years in global and Australian equities who co-founded DMP Asset Management and grew it to $1 billion AUM. Since 2015 he has been Executive Director and Portfolio Manager at Citadel Fund Managers, focused on small- and mid-cap growth stocks.

Mariana Reaper· Accounts & Office Administration

A bookkeeper with a decade of experience in accounts management, payroll, and bank reconciliation across the building, art gallery, and finance industries.

Alex McLean

What they invest in

from 8 of 8 portfolio companies

AI & Machine Learning ×4Advanced Manufacturing ×3Enterprise Software ×3Biotech ×2Developer Tools ×2Healthtech ×2Robotics ×2Data & Infrastructure ×1

HQs:United States×7Canada×1

Investments · 8 tracked

founders shown can be your intro path

AxionOrbital Spaceaxionorbital.space in 𝕏Seed

AxionOrbital Space develops AI models that convert synthetic aperture radar data into optical-like imagery, enabling continuous Earth observation regardless of cloud cover or time of day.

Advanced ManufacturingSpace TechSan Francisco, US

Dhenenjay Yadav(Founder)in Atharva Peshkar(Founder)in

Co-investorsPioneer Y Combinator Blast.Club CCL Investments SaRL Character Founders Future +5 more

General Trajectorygeneraltrajectory.com in 𝕏Seed

General Trajectory develops artificial intelligence applications for physical-world challenges, with focus areas including autonomous systems and scientific research.

Advanced ManufacturingAI & Machine LearningRoboticsSan Francisco, US

Joshua Belofsky(Founder)in

Co-investorsY Combinator

hiloophiloop.ai in 𝕏Seed

hiloop provides snapshottable, forkable compute infrastructure with built-in observability for AI agents that propose, run, and verify experiments (autoresearch).

AI & Machine LearningData & InfrastructureDeveloper ToolsEnterprise SoftwareSan Francisco, US

Karan Brar(Founder/CEO)in Thomas Boser(Founder/CTO)in

Co-investorsRedbud Trail Group Transpose Platform Management Vela Partners Y Combinator Andreessen Horowitz AV Capital +11 more

Kopra Biokopra.bio inSeed

Kopra Bio develops cancer immunotherapy technology that converts cancer cells into biofactories to produce their own destruction.

BiotechHealthtechMedical DevicesSan Francisco, US

Alexander Haddad(Founder)in

Co-investorsBoutique Venture Partners Chamaeleon Lexi Ventures Metaplanet Mythos Ventures Management, Llc Noxo Capital +14 more

Mosaicmosaic.inc in 𝕏Seed

Mosaic offers a tool that aggregates and centralizes AI coding sessions in one place, distributed via a Homebrew package for developers and AI agents.

AI & Machine LearningDeveloper ToolsEnterprise SoftwareSan Francisco, US

Shubham Patil(Founder)in Dorsa Rohani(Founder)in

Co-investorsVela Partners Y Combinator Brightstone Venture Capital Foxmont Capital Partners General Catalyst OurCrowd +1 more

Splash Inc.splash9.com in 𝕏Seed

Splash9 manufactures autonomous surface vessels (ASVs) for maritime applications including coastal defense, harbor patrols, seabed mapping, and infrastructure security.

Advanced ManufacturingDefense TechHardwareRoboticsLos Angeles, US

Ivan Avanesov(Founder)in Marcell Veszpremi(Founder)in

Co-investorsSterling Road Ubiquity Ventures Y Combinator 468 Capital Accomplice Acies Investments +9 more

Talking Computerstalkingcomputers.ai in 𝕏Seed

Talking Computers uses AI-driven agents to optimize machine learning training and inference infrastructure, working across multi-week engagements to run parallel experiments and improve performance on customer workloads, including GPU kernel acceleration and model latency.

AI & Machine LearningEnterprise SoftwareToronto, CA

Zayaan Mulla(Founder)in Parsa Bahraminejad(Founder)in

Co-investorsPioneer Y Combinator General Advance Northside Ventures Perpetual VC Robinhood

TareBiotarebio.com inSeed

TareBio operates a platform for developing personalized and population-level vaccines against cancer and infectious diseases by analyzing immune cells already responding to a disease and reverse-engineering the antigens that activate them.

BiotechHealthtechSan Francisco, US

Eta Atolia(Founder)in

Co-investorsY Combinator CCL Investments SaRL Doomers Media LLC DTA Capital Advisors, LLC Eight Capital

Portfolio news

latest coverage across their companies

TareBio: Vaccines for any cancer or infection in weeks

TareBio · ycombinator.com · Aug 4, 2026

hiloop: we run thousands of experiments to improve your models

hiloop · ycombinator.com · Jul 29, 2026

Talking Computers: The AI Communication Lab

Talking Computers · ycombinator.com · Mar 4, 2026

AxionOrbital Space : SOTA Foundation Models for 24/7 Earth Observation

AxionOrbital Space · ycombinator.com · Jan 6, 2026

🤖 General Trajectory - A Foundation Model for Humanoid Robots

General Trajectory · ycombinator.com · Jan 5, 2026

Frequently asked questions

How many investments has Grey Street Partners made?: Grey Street Partners has 8 tracked investments.
What stage does Grey Street Partners invest at?: Grey Street Partners invests at the Seed, Growth stages.
What is Grey Street Partners's typical check size?: Grey Street Partners typically writes checks of $50K.
What sectors does Grey Street Partners focus on?: Grey Street Partners focuses on AdTech, Advanced Manufacturing, AI & Machine Learning, Biotech, Climate Tech, Cloud Computing, Consumer, Crypto & Web3, Cybersecurity, E-commerce, EdTech, Energy, Enterprise Software, Fintech, Gaming, Healthtech, IoT, Medical Devices, Mobility & Transportation, PropTech, Quantum Computing, Robotics, SaaS, Semiconductors, Space Tech.
Where is Grey Street Partners located?: Grey Street Partners is headquartered in Melbourne, AU.

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