OLIN Corp — Director's Dealing 2011

May 16, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: OLIN CORP (OLN)
CIK: 0000074303
Period of Report: 2011-05-12

Reporting Person: OConnor John MB (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-05-12	Common Stock $1 par value	A	1039	$24.08	Acquired	9892	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-05-12	Phantom Stock Units	$0	A	2700	Acquired		Common Stock (2700)	Direct

Footnotes

F1: Shares of common stock granted under the Amended and Restated 1997 Stock Plan for Non-employee Directors, the Company's formula director compensation plan.

F2: Phantom shares of common stock are also credited periodically to a deferred stock account under the Amended and Restated 1997 Stock Plan for Non-employee directors and are settled in common stock or cash following the date the reporting person ceases to be a director.

F3: Security converts to common stock on a one-for-one basis.