# 55 Foundry

55 Foundry is a Private Equity based in Manhattan Beach, United States.

## Overview

- **Organization type:** Private Equity
- **Headquarters:** Manhattan Beach, United States
- **Region:** North America
- **Address:** Manhattan Beach, CA, United States
- **Assets under management:** Undisclosed
- **Website:** 55foundry.com
- **LinkedIn:** https://linkedin.com/company/55foundry

## Regulatory record

- **Reports private funds:** No

## About

55 Foundry is a software and services company based in Manhattan Beach, California. It operates in the consumer and enterprise products industry. The company commercializes consumer and enterprise products.

## Sectors

- Enterprise Software
- AI/ML
- Cybersecurity
- Industrial Tech
- FinTech

## People

- Brian Noble — Managing Partner

## Questions

### Who runs investment decisions at 55 Foundry?

Brian Noble is the Managing Partner and sole decision-maker. He sources, evaluates, and approves every investment. Noble's background combines venture investing with an operating stint as a software CEO, which he leverages when advising portfolio founders on go-to-market and technical hiring.

### How does 55 Foundry source proprietary deal flow?

The firm's origination relies almost entirely on Brian Noble's personal network of technical founders, former colleagues, and co-investors. He targets platform shifts in enterprise infrastructure — data orchestration, AI tooling, cybersecurity — where founder quality is the primary selection filter and cold-inbound deals rarely advance.

### Does 55 Foundry participate in fund commitments or only direct deals?

55 Foundry invests exclusively through direct equity and converts in Seed and Series A rounds. It does not act as a fund-of-funds or allocate to other venture managers. The firm reserves significant capital — sometimes writing follow-on checks up to $5 million — for its best-performing companies in later rounds.

### What investment stages does 55 Foundry typically target?

The firm targets pre-revenue to early-revenue companies at the Seed and Series A stages. Check sizes start between $1 million and $3 million. In selected cases — such as Astronomer's 2023 growth round — 55 Foundry has followed its position into later-stage financings led by growth-equity firms.

### Which sectors does 55 Foundry explicitly avoid?

The firm avoids consumer internet, hardware, biotech, and capital-intensive cleantech. Its focus is purely enterprise software, AI/ML infrastructure, cybersecurity, and adjacent developer-tooling markets. Consumer-adjacent or physical-product startups fall outside the investment mandate.

### What is 55 Foundry's known posture on co-investments alongside external GPs?

55 Foundry routinely co-invests alongside larger venture firms and growth-stage managers. For example, it joined Bain Capital Ventures in Astronomer's 2023 Series C. Co-investment rights are negotiated at the Seed and Series A stage, allowing the firm to participate in insider rounds when syndicate partners lead subsequent financings.

## Related profiles

- [50K Ventures](https://altss.com/profile/50k-ventures)
- [5Digital Ventures](https://altss.com/profile/5digital-ventures)

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Last updated: 2026-06-03T20:00:00.000Z

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