OLIN Corp — Director's Dealing 2010

Apr 30, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: OLIN CORP (OLN)
CIK: 0000074303
Period of Report: 2010-04-28

Reporting Person: PAIN GEORGE H (Vice President)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-04-28	Phantom Stock Units	$	I	14146.8158	Disposed		Common Stock (14146.8158)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock $1 par value	12453.48	Direct
Common Stock $1 par value	463.4865	Indirect

Footnotes

F1: Fractional amount represents shares held under the Olin Corporation dividend reinvestment plan.

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 April 23, 2010.

F3: Each phantom unit is the economic equivalent of one share of Olin Corporation common stock. Shares are payable following termination of employment and may be transferred by the reporting person into an alternative investment account at any time.

F4: Phantom shares transferred to cash account in a multi-fund benefit plan.