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Investor Contacts

Effective January 25, 2010, EQ Shareowner Services became Olin’s transfer agent and registrar.
Please use the following information to contact EQ Shareowner Services with any questions you may have concerning your Olin common stock. For written inquires:

EQ Shareowner Services
PO Box 64874
St.Paul, MN 55164-0874

or

EQ Shareowner Services
1110 Centre Pointe Curve, Suite 101
MAC N9173-010
Mendota Heights, MN 55120

By Phone:

(800) 468-9716

or

(651) 450-4064

Online:

www.shareowneronline.com/UserManagement/ContactUs

PO Box 64874
St. Paul, MN 55164-0874

or

EQ Shareowner Services
1110 Centre Pointe Curve, Suite 101
MAC N9173-010
Mendota Heights, MN 55120

Phone:

+1.800.468.9716

or

+1.651.450.4064

www.shareowneronline.equiniti.com