
Greybull Stewardship
5900 Doyle Street, Emeryville, CA, 94608, United States
Overview
Greybull Stewardship, LP is an investment fund that invests in great businesses to hold the investments -- not to ‘exit’. Greybull Stewardship is building a portfolio of outstanding businesses and managers; providing stable, long-term, and non-distracting ownership; and allowing the financial performance and competitive advantages of those businesses to compound over time.
- Total investments
- 3
- Lead investments
- 1
- Investments · 12mo
- 0
- Active investors
- 1
Investment portfolio
- Yourway Learning
Led · Equity · Aug 2025
Yourway Learning is an AI-powered K-12 education company offering educator-first, research-backed AI solutions. Its platform includes Yourway Spark, a real-time AI student environment currently in limited district pilots. The company reports that over 53% of educators in recent state pilots said AI reduced workload and supported high-dosage tutoring. The $9 million equity round will accelerate the rollout of Yourway Spark, deepen integrations with district systems, and expand targeted professional development and customer success. Yourway’s tools aim to streamline lesson planning, differentiation, grading, and communications while personalizing learning at scale using research-backed frameworks. The company positions itself as a strategic, policy-aligned partner for districts seeking responsible AI adoption rather than a generic vendor.
- D-Tools
Participated · Series C · Aug 2025
D-Tools provides business management software tailored to the systems integration market, offering the on-premise System Integrator (SI) product and the cloud-based D-Tools Cloud platform. Its software helps integrators manage sales, system design, project documentation, procurement, installation, and service management. The company serves more than 8,000 companies across over 90 countries. Led by CEO Mason Myers and based in Concord, CA, D-Tools intends to use new capital to expand operations and accelerate development. The article does not disclose revenue figures or other financial metrics.
- Custodia Bank
Participated · Series A · Apr 2021
Avanti Financial Group provides a regulated bridge to the U.S. dollar payments system and custody services for digital assets designed to meet institutional custody standards. The company intends to use recent funding to meet required regulatory capital for launch and to fund engineering build and other operating expenses. Avanti has raised a total of $44M since inception, including a $37M Series A disclosed in this article. Backers include a global mix of institutional investors, cryptocurrency companies, family offices, multiple Avanti executives and directors, and individual investors prominent in crypto, tech and asset management. Leadership is headed by founder and CEO Caitlin Long. Avanti is required to comply with U.S. laws including the Bank Secrecy Act and federal KYC/AML rules and will also comply with Wyoming’s special purpose depository institution and digital asset statutes, which require 100% reserved fiat deposits and heightened consumer protections.
Team
Mason Myers
Founder and CEO
LinkedIn