This
year
Company
Revenue (millions)Local staff (1)
Year founded
Type of business
Top executive
2017
2016
% change
1
Medical Mutual of Ohio
2060 E. 9th St., 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
25825 Science Park Drive, Suite 400, 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.
29500 Solon Road, 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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