Verified Nov 2026
Metal Fabrication
·
East Alton, Illinois
·
Since
Winchester Ammunition manufactures ammunition for hunting, sport shooting, military, law enforcement, and industrial use. The company is headquartered in East Alton, Illinois, and operates in the United States, with an estimated 1,000 to 5,000 employees and estimated annual revenue of $1 to 5 billion. It is a subsidiary of Olin Corporation and serves the automotive, electric-vehicle, military-defense, industrial-equipment, and consumer-goods industries. In September 2026, the company was reported to have received a $788 million U.S. Army ammunition contract.
Winchester Ammunition at a glance
Revenue
$1-5B
Est. band
Employees
1,000-5,000
Headquarters
East Alton, Illinois
Certifications
ISO 9001 · ITAR registered
Import activity
1446
Industries
Automotive
Electric Vehicles
Military & Defense
Industrial Equipment
Consumer Goods
Sourcing and import activity
From US customs bill-of-lading records
US sea imports
1446
Named foreign suppliers
50
Top origins
France · Germany · Belgium · Italy
Shared foreign counterparties do not establish that these companies buy from Winchester Ammunition.
What this tells a buyer
Winchester was reported to have been awarded a $788 million U.S. Army ammunition contract in September 2026, according to public reporting.
The company holds ISO 9001 certification and is registered under ITAR, and its facilities include a plant in East Alton, Illinois, with additional sites in Manitowoc, Wisconsin, and Oxford, Mississippi.
Winchester is part of Olin Corporation and opened a new office in Clayton, Missouri, in November 2025.
Source: US customs bill-of-lading records and public filings · Last verified Nov 05, 2026
Overview
Winchester Ammunition manufactures ammunition for hunting, sport shooting, military, law enforcement, and industrial use. The company is headquartered in East Alton, Illinois, and operates in the United States, with an estimated 1,000 to 5,000 employees and estimated annual revenue of $1 to 5 billion. It is a subsidiary of Olin Corporation and serves the automotive, electric-vehicle, military-defense, industrial-equipment, and consumer-goods industries. In September 2026, the company was reported to have received a $788 million U.S. Army ammunition contract.
At a glance
Attribute | Detail |
|---|---|
Headquarters | East Alton, Illinois |
Employees | 1,000-5,000 |
Revenue | $1-5B (estimated) |
Primary capability | Metal Fabrication |
Certifications | ISO 9001 · ITAR registered |
What Winchester Ammunition makes
The company holds ISO 9001 certification and is registered under ITAR, and its facilities include a plant in East Alton, Illinois, with additional sites in Manitowoc, Wisconsin, and Oxford, Mississippi.
Certifications
Winchester Ammunition is associated with the following certifications in public sources. Confirm the certified scope for the specific plant producing your part:
ISO 9001 — flippingbook.com
ITAR registered — winchester.com
Trade and customs footprint
Winchester was reported to have been awarded a $788 million U.S. Army ammunition contract in September 2026, according to public reporting. US customs bill-of-lading records list 1446 inbound shipments across 50 foreign suppliers, with top origins including France · Germany · Belgium · Italy.
Latest developments
2026-09-21 — Winchester Ammunition Awarded US Army Contract | Winchester Ammunition (winchester.com)
2026-09-15 — Winchester Bags $788 Million Army Ammo Contract (guns.com)
2026-02-11 — Topping Out Marks Progress on New Ammunition Facility at Lake City Plant | JE Dunn Construction (jedunn.com)
2026-01-20 — St. Louis Business 500: Q&A with Brett Flaugher, Olin Corporation/Winchester Ammunition | St. Louis Magazine (stlmag.com)
2025-11-24 — Winchester Announces Opening of State-of-the-Art Office in Clayton, Missouri | Winchester Ammunition (winchester.com)
2025-11-06 — Winchester’s 6.8 mm Lake City Ammo Project on Schedule | An Official Journal Of The NRA (shootingillustrated.com)
Facilities
Winchester Ammunition is headquartered in East Alton, Illinois. Public sources also reference these locations:
Manitowoc, Wisconsin — winchester.com
Oxford, Mississippi — winchester.com
Company details
Winchester is part of Olin Corporation and opened a new office in Clayton, Missouri, in November 2025. Winchester Ammunition has an estimated 1,000-5,000 employees, and is headquartered in East Alton, Illinois.
Frequently asked questions
What does Winchester Ammunition make?
Winchester Ammunition manufactures ammunition for hunting, sport shooting, military, law enforcement, and industrial use. The company is headquartered in East Alton, Illinois, and operates in the United States, with an estimated 1,000 to 5,000 employees and estimated annual revenue of $1 to 5 billion. It is a subsidiary of Olin Corporation and serves the automotive, electric-vehicle, military-defense, industrial-equipment, and consumer-goods industries. In September 2026, the company was reported to have received a $788 million U.S. Army ammunition contract.
Where is Winchester Ammunition headquartered?
Winchester Ammunition is headquartered in East Alton, Illinois (600 Powder Mill Rd, East Alton, Illinois, 62024-1273).
How big is Winchester Ammunition?
Winchester Ammunition has an estimated 1,000-5,000 employees, with revenue in the $1-5B range (estimated).
What certifications does Winchester Ammunition hold?
Winchester Ammunition lists ISO 9001 · ITAR registered on its website. Confirm the certified scope for the specific plant producing your part.
Does Winchester Ammunition import from overseas suppliers?
US customs bill-of-lading records show 1446 inbound shipments for Winchester Ammunition, with top origins including France · Germany · Belgium · Italy.
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