M.A. Hanna Company
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| Fate | Merged with Geon Company, August 2000, to form PolyOne Corporation |
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| Founded | Mahoning Valley 1840 |
| Founder | Daniel F. Rhodes Marcus Hanna |
| Headquarters | Cleveland, Ohio, United States |
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Number of employees
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7,149 |
| Parent | PolyOne Corporation |
| Subsidiaries | Hanna Coal & Ore Company (liquidized 1965) |
M. A. Hanna Company was an iron ore processing company located in Cleveland, Ohio, United States.
The origins of the M. A. Hanna Co. are with Daniel F. Rhodes. In the 1840s Rhodes had founded Rhodes & Company which mined coal in the Mahoning Valley. Marcus Hanna, the national Republican political figure, then married into the Rhodes family setting the stage for a change. It became Hanna Mining in 1885. In the mid-1860s the company expanded into iron ore mining in the area around Lake Superior.
Incorporation took place in 1922 and was named as the M.A. Hanna Company. In 1929 the Hanna Company transferred its blast furnaces, coke ovens, and other materials to National Steel Corporation for stock in NSC. Hanna's bituminous coal properties were put into the newly formed Consolidation Coal Company in 1945 in return for CCC stock.
In the early 1950s the company began diversification under George Humphrey producing high-grade iron ore pellets and establishing Iron Ore Company of Canada. Hanna also acquired interests in mineral companies in Latin America as well as beginning the mining of nickel in Oregon and silicon in Washington.
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