OLIN Corp — Director's Dealing 2013

May 21, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: OLIN CORP (OLN)
CIK: 0000074303
Period of Report: 2013-05-20

Reporting Person: Curley Stephen C (Vice President and Treasurer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-05-20	Common Stock $1 par value	M	3200	$18.52	Acquired	28287	Direct
2013-05-20	Common Stock $1 par value	S	3200	$25.0564	Disposed	25087	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-05-20	Employee Stock Option Right to Buy	$18.52	M	3200	Disposed	2014-02-11	Common Stock (3200)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock $1 par value	2087.4332	Indirect

Footnotes

F1: This transaction was executed in multiple trades ranging from $25.05 to $25.07. The price reported above reflects the average weighted sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2: The figure represents shares of Olin Common Stock held under the Olin Common Stock Fund of the Olin Corporation Contributing Employee Ownership Plan (CEOP), a tax conditioned plan reflecting transactions exempt under Rule 16b-3, as reported by the CEOP Plan Administrator as of March 31, 2013.

F3: The option for 9,600 shares vested in three equal annual installments on February 12, 2005, 2006 and 2007.