Investors / United States / Walden Catalyst
Walden Catalyst
Venture capital · San Francisco, CA, United States · North America
Walden Catalyst is a venture firm led by Lip-Bu Tan and Young Sohn that makes early-stage investments. It focuses on data, deep tech, AI, cloud, fintech, and digital biology across the US, Europe, and Israel.
Invests inAI & Machine LearningCybersecurity
Your fit with Walden Catalyst
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See how your round matches what it backs, point by point.
Or find every investor that fitsWalden Catalyst lists 36 checked portfolio companies on its own site and is named in 12 funding rounds, 8 of them as lead. Its most frequent entry is Seed, 33% of the companies with a known first round. Its largest themes are AI & Machine Learning (40%), Cybersecurity (20%) and Enterprise Software (13%). 71% of its companies are based in United States. It invests most often alongside A&E Investments, Cambium Capital and Samsung Catalyst Fund.
Counts come from funding rounds that name Walden Catalyst, complete from mid-2025: earlier rounds appear only when they were reported later. Round amounts and full round histories are on Fundup AI.
Round figures show recent activity, not Walden Catalyst's whole history. Rounds on record name 12 companies; its own site lists 36. Funding rounds are complete from mid-2025, so counts and the yearly trend undercount a firm that invested before then. The portfolio, themes and places come from its own site and are not affected.
Entry stage
share of companies by the stage of its first roundShow as a table
| Value | |
|---|---|
| Pre-seed | 0% |
| Seed | 33% |
| Series A | 33% |
| Series B | 17% |
| Growth | 17% |
Activity by year
rounds it joined, last 10 yearsShow as a table
| Total | Rounds it led | |
|---|---|---|
| '17 | 0 | 0 |
| '18 | 0 | 0 |
| '19 | 0 | 0 |
| '20 | 0 | 0 |
| '21 | 0 | 0 |
| '22 | 0 | 0 |
| '23 | 0 | 0 |
| '24 | 1 | 1 |
| '25 | 3 | 2 |
| '26 | 8 | 5 |
Investor profile
percentile among all firmsShow as a table
| Measure | Percentile of all firms | Value |
|---|---|---|
| Portfolio size | 74th | 36 companies |
| Recent activity | 94th | 9 rounds in 12 months |
| Early stage | 64th | 33% of entries at pre-seed or seed |
| Evidence | 96th | 28% of companies confirmed by a round |
| Sector focus | 74th | 40% in its largest sector |
| Reach | 84th | 6 countries |
Investment themes
share of its checked companiesThis firmAll checked companies
Show as a table
| This firm | All checked companies | |
|---|---|---|
| AI & Machine Learning | 40% | 18% |
| Cybersecurity | 20% | 4% |
| Enterprise Software | 13% | 8% |
| Healthcare & Biotech | 12% | 15% |
| Industrial & Manufacturing | 7% | 7% |
| Robotics & Hardware | 5% | 1% |
| Space & Defense | 2% | 3% |
| Human Resources | 2% | 1% |
Invests most often with
firms sharing its portfolio companiesShow as a table
| Share | |
|---|---|
| A&E Investments | 9 |
| Cambium Capital | 7 |
| Samsung Catalyst Fund | 6 |
| Bessemer Venture Partners | 4 |
| Celesta Capital | 4 |
| Intel Capital | 3 |
| Pitango | 3 |
| Archerman Capital | 2 |
Its portfolio companies
where they are based, and what their own sites showSite status
- Site answers2981%
- No longer answers00%
- Points to another company719%
- Parked or sold domain00%
A site that stops answering three checks in a row is counted as no longer answering; that is not proof of closure. A site that points to another company is often an acquisition.
Co-investor network
who it backs companies with, and who they back togetherCompare Walden Catalyst head to head
portfolio size, rounds, entry stages, themes and the companies both backThree or more firms at once: portfolio overlap.
Recent portfolio activity
when companies last raised with Walden Catalyst| Date | Company | Stage |
|---|---|---|
| 27 Oct 2026 | Series A Led | |
| 22 Sept 2026 | Series C+ | |
| 15 Sept 2026 | Series B Led | |
| 22 Jun 2026 | Series C+ | |
| 5 May 2026 | Seed Led | |
| 5 May 2026 | Seed | |
| 21 Apr 2026 | Seed Led | |
| 12 Feb 2026 | Series B Led |
Round details for Walden Catalyst
Amounts, full round histories and every co-investor in Walden Catalyst's rounds are on Fundup AI. VCinfo covers investors and their portfolios.
Portfolio
36 companies checked against their own sites| Company | What it does | Themes | First round with it | Evidence |
|---|---|---|---|---|
| 3DGS manufactures glass substrates for advanced packaging of semiconductors and other electronics. | Industrial & ManufacturingAI & Machine Learning | Portfolio page | ||
| AI21 trains specialized models for clients using their data to create customized AI solutions | AI & Machine LearningEnterprise Software | Portfolio page | ||
| Amperesand develops and manufactures medium voltage solid state transformers for critical power infrastructure | Industrial & ManufacturingAI & Machine Learning | Nov 2025Series A | Page + round | |
| Portfolio page | ||||
| Artera develops and provides AI-powered precision medicine and cancer therapy tests | Healthcare & Biotech | Portfolio page | ||
| Portfolio page | ||||
Industrial & ManufacturingRobotics & Hardware | Portfolio page | |||
Healthcare & Biotech | Portfolio page | |||
| Darktrace provides cybersecurity solutions using artificial intelligence | CybersecurityAI & Machine Learning | Portfolio page | ||
| Empower Semiconductor develops power delivery solutions for AI and HPC applications | AI & Machine LearningHuman Resources | Sept 2025Series A | Page + round | |
| Genome Medical provides genetic services and counseling to patients and families with rare diseases | Healthcare & Biotech | Portfolio page | ||
| The company provides a platform to protect organizations from hiring fraudsters using AI-powered verification and detection tools | CybersecurityAI & Machine Learning | Feb 2024Seed | Funding round | |
| Graphcore accelerates machine learning in the cloud | AI & Machine LearningCybersecurity | Portfolio page | ||
| Greenstone Biosciences leverages human iPSC-based New Approach Methodologies and Artificial Intelligence technologies for drug discovery | Healthcare & Biotech | Portfolio page | ||
| Habana Labs develops artificial intelligence processors and deep learning accelerators | AI & Machine LearningCybersecurity | Portfolio page | ||
| Hyperbolic provides a platform for accessing and managing global AI compute resources, including GPUs and Kubernetes clusters | AI & Machine LearningCybersecurity | Oct 2026Series A | Funding round | |
| Hyperbolic provides a platform for accessing and managing global AI compute resources, including GPUs and Kubernetes clusters | AI & Machine LearningCybersecurity | Portfolio page | ||
| IonQ develops and provides quantum computing technology and services to tackle complex challenges and protect critical data. | Healthcare & BiotechAI & Machine Learning | Portfolio page | ||
AI & Machine LearningCybersecurity | Portfolio page | |||
AI & Machine LearningSpace & Defense | Portfolio page |
About this data
site last read 5 Nov 2026- Site
- waldencatalyst.com
- Last read
- 5 Nov 2026
- Watching since
- 5 Nov 2026
- Rounds since
- 15 Feb 2024
- Companies checked
- 36
Rates come from what VCinfo has observed since observation_start. Firms tend to remove companies that closed, so early rates understate reality. A company leaving a portfolio page does not mean it closed or exited. An unreachable site means our checks failed, nothing more.
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