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Private company

Oregon Steel Mills

Logo: Evraz, Public domain, via Wikimedia Commons3

American steel producer

Oregon Steel Mills (OSM), a subsidiary of Orion Steel Companies, is an American steelmaker owned by Atlas Holdings. The company was founded in 1926 in Portland, Oregon, United States.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1926Founded1

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Oregon Steel Mills (OSM), a subsidiary of Orion Steel Companies, is an American steelmaker owned by Atlas Holdings. The company was founded in 1926 in Portland, Oregon, United States.2

Corporate structure

Oregon Steel Mills sits at the top of its group. 2 entities, 1 country on record. Switch between the flow chart and the network, and select any entity to see its details.

Built from subsidiaries, stakes and holdings from Wikidata (CC0); major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

Subsidiaries and ownership

Subsidiaries

From Wikidata.1

Timeline

  1. 1926Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

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