This
year
CompanyRevenue (millions) (1)Local staff (2)
Year founded
Type of business
Top executive
2017
2016
% change
1
Medical Mutual of Ohio, Cleveland
(216) 687-7000 / medmutual.com
$3,137.0
$3,000.0
5%
1,933
1934
Health insurance company
Rick A. Chiricosta, chairman, president, CEO
2
Aleris, Beachwood
(216) 910-3400 / aleris.com
$2,857.0
$2,664.0
7%
200
2004
Aluminum rolled products manufacturer serving industries including automotive, aerospace and construction
Sean M. Stack, chairman, CEO
3
Swagelok Co., Solon
(440) 248-4600 / swagelok.com
$2,000.0
$2,000.0
0%
4,535
1947
Provider of fluid system products, assemblies, services and training
Arthur F. Anton, chairman, CEO
RESEARCHED BY Chuck Soder (csoder@crain.com)

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