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Rosemore Inc.
Rosemore Inc. was formed in 1931 by the original founders of the American Oil Company to consolidate and expand their holdings. Henry A. Rosenberg Jr.
Rosemore Inc.
Rosemore Inc. was formed in 1931 by the original founders of the American Oil Company to consolidate and expand their holdings. Henry A. Rosenberg Jr. and Frank B. Rosenberg now serve as co-chairmen, with Frank also acting as CIO. The underlying wealth originated in oil refining and marketing through Crown Central Petroleum. Primary operations today center on oil and gas exploration, production, and transportation through Tema Oil and Gas Company and Gateway Gathering and Marketing Company. The firm also holds real estate assets including properties at 100 Light Street and 1 North Charles Street in Baltimore plus acreage in the Permian Basin. Investment activity spans direct holdings in energy infrastructure, private credit, and real estate across North America. The firm maintains an operational office in Houston and participates in local networks such as the Center Club and the National Aquarium in Baltimore. Henry A. Rosenberg Jr. holds emeritus board status at the Center Club. Two family foundations, the Henry and Ruth Blaustein Rosenberg Foundation and the Rosemore Family Foundation Inc., sit alongside the office. Rosemore Inc. integrates operating-company management with investment deployment under the same principals, a structure that ties day-to-day energy operations directly to capital allocation decisions.
General information
Firm type
Single Family Office
Year founded
1931
Location
Region
North America
Country
United States
City
Baltimore
Corporate office
Baltimore, MD, United States
Additional offices
Houston, TX, United States
Principals
Henry A. Rosenberg Jr.
Co-Chairman
Frank B. Rosenberg
Co-Chairman and CIO
Sector focus
Frequently asked questions
Who runs investment decisions at Rosemore Inc.?
Frank B. Rosenberg holds the roles of Co-Chairman and CIO.
Where does the underlying wealth come from?
The Rosenberg family built its fortune through oil refining and marketing, principally via Crown Central Petroleum.
Does Rosemore Inc. participate in fund commitments or only direct deals?
The firm deploys through direct holdings in operating subsidiaries and a diversified portfolio that includes real assets and marketable securities.
Which sectors receive the largest allocations?
Energy exploration, production, and midstream infrastructure form the core of current operations.
How is Rosemore Inc. related to the Blaustein family?
Rosemore manages wealth associated with the Blaustein/Rosenberg families.
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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