Stonewin International, LLC

Stonewin International, LLC, a Delaware-registered foreign-owned limited liability company, is a specialized petroleum supplier delivering aviation turbine fuel, diesel fuel, marine gas oil, and related refined petroleum products to the Department of Defense's Defense Logistics Agency (DLA) Energy as a prime contractor. Stonewin operates exclusively in the full-and-open federal contracting space with no small business set-asides across its entire federal footprint, reflecting its foreign-owned status and scale as a larger commercial entity.

Since entering federal contracting in December 2020, Stonewin has captured 549 prime awards—100 percent of its federal portfolio—from a single customer agency: DLA Energy. The vendor's combined potential value across all awards stands at $189.3 million, with $36.5 million obligated to date, representing approximately 19 percent execution against ceiling. Activity has grown sharply: three awards in 2022, ten in 2023, 157 in 2024, and 284 in 2025, with 93 awards already recorded in the first four months of 2026. This trajectory reflects rapid scaling of delivery orders under a expanding portfolio of indefinite delivery vehicle agreements.

Stonewin's concrete capability centers on fuel logistics and petroleum product supply. Representative work includes a $12.3 million single-award aviation turbine fuel contract (May 1, 2025 through November 30, 2029) under the DLA Energy Foreign End-Use Program for Caribbean military installations including Guantanamo Bay, Curacao, and Andros Island, with performance originating from Leipsic, Delaware; an $8.4 million single-award diesel fuel contract (September 26, 2024 through September 30, 2027) for Africa Command operations across Djibouti, Somalia, Sao Tome, and Burkina Faso; and a $6.8 million marine gas oil contract (December 11, 2024 through March 31, 2029) for global DLA Energy operations. Delivery orders across the portfolio consistently employ fixed-price pricing with economic price adjustment mechanisms tied to petroleum market indices, with individual order values typically ranging from approximately $1,400 to over $2 million. All work is performed at or distributed from the company's Leipsic, Delaware hub, which serves as the logistics nexus for supply across Eastern Europe, Africa, South America, the Caribbean, and other strategic global regions.

Stonewin's customer concentration is absolute: DLA Energy accounts for all 549 awards and the entire $189.3 million in combined potential value. The five largest parent indefinite delivery vehicles generate the bulk of transactional volume: contract SPE60524D9403 carries 417 task orders ($13.8 million potential value), SPE60523D9403 carries 29 task orders ($370 thousand), SPE60824D0355 carries 19 task orders ($2.8 million), SPE60521D1011 carries 13 task orders ($331 thousand), and SPE60525D1258 carries 11 task orders ($3.9 million). The NAICS footprint is narrow: all 549 awards fall under Petroleum Refineries; 360 awards carry PSC codes for Liquid Propellants and Fuels (Petroleum Base), and 189 carry PSC codes for Fuel Oils. Stonewin has no documented subcontract position in the federal space.

Stonewin International headquarters in Dover, Delaware and maintains corporate status as a for-profit foreign-owned entity with tax-exempt designation in its structure reporting. The vendor does not hold a government-wide acquisition contract (GWAC), a General Services Administration (GSA) Schedule, or any other multi-agency vehicle; all work flows exclusively through DLA Energy single-award and multiple-award indefinite delivery vehicles. The company's entire federal footprint is concentrated in fuel supply to military installations and contingency operations, with no diversification into services, IT, construction, or other federal market segments.