Olin Corporation Performance Share Program as amended through January 24, 2019

One-half (1/2) of the total target Performance Share Award shall be designated in TSR Performance Shares, and the remaining one-half in Net Income Performance Shares.

The number of target TSR Performance Shares for each Participant shall be adjusted based upon a comparison of Olin’s TSR during the Performance Cycle with the TSR of the Performance Share Comparison Group over the same period, in accordance with the following chart:

The number of target Net Income Performance Shares for each Participant shall be adjusted based upon a comparison of Olin’s actual Net Income for the relevant Performance Cycle with the target Net Income established by the Committee for such Performance Cycle, in accordance with the following chart:

The Company shall use linear interpolation to determine the number of additional Net Income Performance Shares for performance between 60% and 100% and for 100% and 140% of the Net Income Goal. For example, if the Net Income Goal for a three-year Performance Cycle is $300 million, and a Participant’s target number of Net Income Performance Shares is 10,000, the Participant would receive the number of Net Income Performance Shares set forth below opposite the relevant Net Income for that Performance Cycle:

As soon as practicable in the calendar year following the end of the Performance Cycle, the Company shall calculate the number of Performance Shares that vested (the “Final Share Number”) for all

Except as otherwise provided by the Committee, the LTIP, this Program or the Performance Share Award certificate, an interest in a Performance Share Award shall vest only if the Participant is an employee of the Company or a subsidiary on the last day of the relevant Performance Cycle.

If a Participant’s employment with the Company or a subsidiary terminates for cause or without the Company’s consent (other than as the result of the Participant’s death, disability or retirement) before a Performance Share Award has vested, his or her Performance Share Award shall terminate and all rights under such Award shall be forfeited.

If a Participant’s employment with the Company or a subsidiary terminates as the result of his or her disability, (as that term is defined in Section 409A of the Code or any successor provision), or retirement under any of the Company’s retirement plans before a Performance Share Award has vested, the Participant shall be entitled to a pro rata Performance Share Award, payable solely in cash at the time that the Performance Share Award would otherwise be payable under Section 5. The cash payment shall be equal to the Final Share Number calculated in accordance with Sections 3 and 5 of this Program, multiplied by the Fair Market Value on the last day of the relevant Performance Cycle, multiplied by a fraction with a numerator equal to the number of months during the Performance Cycle the Participant was employed by the Company or a subsidiary (rounded up to the nearest whole month) and a denominator of 36.

If a Participant’s employment with the Company or a subsidiary terminates as the result of his or her death before a Performance Share Award has vested, the Participant shall be entitled to a pro rata Performance Share Award, payable solely in cash within ninety (90) days of the Participant’s death. The cash payment shall be equal to the Participant’s target number of Performance Shares, as the case may be, multiplied by the Fair Market Value on the date of the Participant’s death (or the next trading day, if the Common Stock was not traded on such date), multiplied by a fraction with a numerator equal to the number of months during the Performance Cycle the Participant was employed by the Company or a subsidiary (rounded up to the nearest whole month) and a denominator of 36.

If a Participant’s employment with the Company or a subsidiary terminates for any other reason, the Company shall determine the portion, if any, of the Performance Share Award that shall not be forfeited, and the form of payment (cash or shares or a combination) that the Participant shall receive. That determination shall be made by the Committee in the case of any officer, and by the Chairman of the Board, President, Chief Executive Officer, or any Vice President, in the case of any non-officer employee. Notwithstanding this Section 4, payment shall be made pursuant to Section 5.

As soon as is administratively practicable after the determination of the Final Share Number, but not later than the last day of the calendar year following the Performance Cycle, the Company will (i) issue to each Participant a number of shares of the Common Stock equal to one-half of the Final Share Number, rounded down to the nearest whole share if such number is not a whole number, and (ii) pay the Participant in cash an amount equal to the Fair Market Value of one-half of the Final Share Number of shares of Common Stock on the last day of the Performance Cycle, rounded up to the nearest whole share if such number is not a whole number.

No dividends or dividend equivalents shall be paid on any Performance Shares.

In calculating the number of Performance Shares, all percentages and percentile numbers will be rounded to the nearest one-hundredth of a percent.

By acceptance of the Performance Share Award, each Participant agrees that such Award is special compensation, and that any amount paid will not affect:

the amount of any pension under any pension or retirement plan in which he or she participates as an employee of Olin,

the amount of coverage under any group life insurance plan in which he or she participates as an employee of Olin, or

the benefits under any other benefit plan of any kind heretofore or hereafter in effect, under which the availability or amount of benefits is related to compensation.

The Company will withhold from the distribution of any cash pursuant to Performance Share Awards the amount necessary to satisfy the Participant’s federal, state and local withholding tax requirements. It is the Company’s intention that all income tax liability on Performance Share Awards be deferred in accordance with the applicable requirements of Code Section 409A, until the Participant actually receives such shares or payment thereof.

To the extent any provision of the Program (or any Performance Share Award) or action by the Board of Directors or Committee would subject any Participant to liability for interest or additional taxes under Code Section 409A, it will be deemed null and void, to the extent permitted by law and deemed advisable by the Committee. It is intended that the Program (and any Performance Share Award) will comply with Code Section 409A, and the Program (and any Performance Share Award) shall be interpreted and construed on a basis consistent with such intent. The Program (and any Performance Share Award) may be amended in any respect deemed necessary (including retroactively) by the Committee in order to preserve compliance with Code Section 409A. The preceding shall not be construed as a guarantee of any particular tax effect for Program benefits or Performance Share Awards. Except as specifically provided in the LTIP, a Participant (or beneficiary) is solely responsible and liable for the satisfaction of all taxes and penalties that may be imposed on the Participant (or beneficiary) in connection with any distributions to such Participant (or beneficiary) under the Program (including any taxes and penalties under Code Section 409A), and neither Olin nor any Affiliate shall have any obligation to indemnify or otherwise hold a Participant (or beneficiary) harmless from any or all of such taxes or penalties.