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Galatyn Private Equity
Al G. Hill Jr. founded A.G. Hill Partners in 2009 to manage family assets originating from the Hunt oil and gas fortune. The office serves multiple branches...
Galatyn Private Equity
Al G. Hill Jr. founded A.G. Hill Partners in 2009 to manage family assets originating from the Hunt oil and gas fortune. The office serves multiple branches including the Washburne and Summers families. The firm allocates across real estate, private equity, venture capital, direct investments, and public securities. It participates in buyouts, growth equity, and early-stage venture alongside co-investors such as Fortress Investment Group and Petro-Hunt LLC in the 2023 PureWest Energy acquisition. Geographic reach centers on North America with primary activity in Texas and selected holdings in Missouri, Arizona, North Carolina, and Colorado. Portfolio assets include Highland Park Village in Dallas and The Shops at Clearfork in Fort Worth. Joseph D. O'Brien III serves as President and CEO. The team includes approximately a dozen professionals based in Dallas. In April 2025 Mandy de Turck Norris was promoted to President while retaining the CFO title. The firm provides accounting, legal, and family-office services to the newly formed Starhill Holdings, LLC and Gillon Capital, LLC vehicles. A.G. Hill Partners operates as a service provider to affiliated family offices created for separate branches after the 2025 restructuring. This structure separates investment management from branch-specific administration while retaining shared operational support.
General information
Firm type
Single Family Office
Year founded
2009
Location
Region
North America
Country
United States
City
Dallas
Corporate office
Dallas, TX, United States
Principals
Al G. Hill Jr.
Founder
Joseph D. O'Brien III
President and CEO
Mandy de Turck Norris
President and CFO
Sector focus
Frequently asked questions
Who runs investment decisions at A.G. Hill Partners?
Joseph D. O'Brien III serves as President and CEO. Mandy de Turck Norris holds the dual role of President and CFO following her April 2025 promotion.
How does A.G. Hill Partners source proprietary deal flow?
The firm leverages long-standing Texas real estate relationships and energy-sector networks including membership in The Energy Council. Co-investment opportunities arise through partnerships such as the PW Consortium.
Does A.G. Hill Partners participate in fund commitments or only direct deals?
The firm uses both approaches. It commits to external funds while also executing direct co-investments and SPVs, as shown in the 2023 PureWest Energy transaction.
What investment stages does A.G. Hill Partners typically target?
The firm covers buyouts, middle-market transactions, growth equity, and early-stage venture capital.
Where does the underlying wealth come from?
The capital originates from the Hunt family fortune through Al G. Hill Jr., eldest grandson of H.L. Hunt.
How is A.G. Hill Partners related to Gillon Capital, LLC and Starhill Holdings, LLC?
A.G. Hill Partners provides shared services to both entities, which were established in April 2025 to serve the Washburne and Summers family branches respectively.
Does A.G. Hill Partners maintain philanthropic structures?
The family supports The Trinity Family Foundation along with gifts to Southern Methodist University and other Texas institutions.
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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