a. and b.

The 2012 annual meeting of the shareholders (the "meeting") of the Company was held on April 26, 2012. Of the 80,135,791 shares of Common Stock entitled to vote at such meeting, 71,748,422 shares were present for purposes of a quorum. The voting results for each of the three proposals submitted for vote by the shareholders are set forth below.

Proposal 1 - Three Class III Directors were elected at the meeting, for a term of three years, as follows:

                 Votes For    Votes Withheld
Donald W. Bogus  56,995,196     2,206,728

Philip J. Schulz 58,361,221      840,703

Vincent J. Smith 57,026,560     2,175,364

There were 12,546,498 shares non-voted by brokers related to the election of the Class III directors listed above.

The shareholder votes at the meeting on proposals 2 and 3 were as set forth below:

                             Votes For    Votes Against   Abstentions   Broker Non-Votes
Proposal 2 - Conduct an      55,763,115   2,687,554       751,255       12,546,498
advisory vote to approve the
compensation for named
executive officers

Proposal 3 - Ratification of 70,463,827 1,109,415 175,180 0 the appointment of KPMG LLP
as the Company's independent
registered public accounting
firm for 2012

c. and d.

Not applicable.

In accordance with General Instruction B.2., of Form 8-K, the following information shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. Olin disclaims any intention or obligation to update or revise this information.

Attached as Exhibit 99.1 and incorporated herein by reference, is a copy of the slides which will be presented at the Barclays Capital Chemical ROC Stars Conference in New York City on May 3, 2012.

Exhibit No. Exhibit
99.1 Presentation slides for meeting on May 3, 2012.