OLIN Corp — Director's Dealing 2013

May 2, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: OLIN CORP (OLN)
CIK: 0000074303
Period of Report: 2013-04-30

Reporting Person: Greer GBruce (VP,Strategic Plan.&Info. Tech.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-04-30	Common Stock $1 par value	M	5333	$20.68	Acquired	9503	Direct
2013-04-30	Common Stock $1 par value	M	11500	$16.52	Acquired	21003	Direct
2013-04-30	Common Stock $1 par value	M	3000	$14.28	Acquired	24003	Direct
2013-04-30	Common Stock $1 par value	S	19833	$24.1948	Disposed	4170	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-04-30	Employee Stock Option Right to Buy	$20.68	M	5333	Acquired	2016-02-08	Common Stock (5333)	Direct
2013-04-30	Employee Stock Option Right to Buy	$16.52	M	11500	Acquired	2017-02-12	Common Stock (11500)	Direct
2013-04-30	Employee Stock Option Right to Buy	$14.28	M	3000	Acquired	2019-02-05	Common Stock (3000)	Direct

Footnotes

F1: This transaction was executed in multiple trades ranging from $24.12 to $24.27. 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 option vested in three equal annual installments on February 9, 2007, 2008 and 2009.

F3: The option vested in three equal annual installments on February 13, 2008, 2009 and 2010.

F4: The option vested in three equal annual installments on February 5, 2010, 2011 and 2012.