OLN

SEC source: 0001209191-16-150447 · doc4.xml · nonDerivative · entry 2

Fischer John E. · CIK 0001294077 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 156,506

SEC source: 0001209191-16-150447 · doc4.xml · nonDerivative · entry 1

Fischer John E. · CIK 0001294077 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 166,778

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-16-150050 · doc4.xml · derivative · entry 4

OKeefe Thomas J · CIK 0001520055 · SVP, Ammunition

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,417

Underlying: Common Stock · 6,833 shares

Expires 2017-02-13

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: The option vested in three equal annual installments on February 13, 2008, 2009 and 2010.

SEC source: 0001209191-16-150050 · doc4.xml · nonDerivative · entry 2

OKeefe Thomas J · CIK 0001520055 · SVP, Ammunition

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 37,850

SEC source: 0001209191-16-150050 · doc4.xml · nonDerivative · entry 1

OKeefe Thomas J · CIK 0001520055 · SVP, Ammunition

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,514

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-16-150053 · doc4.xml · derivative · entry 4

Slater Todd A · CIK 0001328189 · VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 13,500 shares

Expires 2017-02-13

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: The option vested in three equal annual installments on February 13, 2008, 2009 and 2010.

SEC source: 0001209191-16-150053 · doc4.xml · nonDerivative · entry 2

Slater Todd A · CIK 0001328189 · VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 55,221

SEC source: 0001209191-16-150053 · doc4.xml · nonDerivative · entry 1

Slater Todd A · CIK 0001328189 · VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 64,436

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-16-149896 · doc4.xml · derivative · entry 3

BOGUS DONALD W · CIK 0001108970 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,174

Underlying: Common Stock · 520 shares

Expires not disclosed

F1 · security: Shares of common stock for meeting fees which the reporting person elected to defer under the Amended and Restated 1997 Stock Plan for Non-employee Directors. 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.

F2 · derivative.exercise_price: Security converts to common stock on a one-for-one basis.

F2 · price: Security converts to common stock on a one-for-one basis.

F1 · derivative.exercise_date: Shares of common stock for meeting fees which the reporting person elected to defer under the Amended and Restated 1997 Stock Plan for Non-employee Directors. 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.

F1 · derivative.expiration_date: Shares of common stock for meeting fees which the reporting person elected to defer under the Amended and Restated 1997 Stock Plan for Non-employee Directors. 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.

SEC source: 0001209191-16-149864 · doc4.xml · derivative · entry 4

Ennico Dolores J · CIK 0001463368 · VP, Human Resources

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,750

Underlying: Common Stock · 13,500 shares

Expires 2017-02-13

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: The option vested in three equal annual installments on February 13, 2008, 2009 and 2010.

SEC source: 0001209191-16-149864 · doc4.xml · nonDerivative · entry 2

Ennico Dolores J · CIK 0001463368 · VP, Human Resources

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,014

SEC source: 0001209191-16-149864 · doc4.xml · nonDerivative · entry 1

Ennico Dolores J · CIK 0001463368 · VP, Human Resources

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,287

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-16-149233 · doc4.xml · nonDerivative · entry 1

Dawson Pat D · CIK 0001654933 · Pres, Epoxy & International

10b5-1 filing: Not disclosed

Ownership: Indirect · Family Trust

Disclosed balance after: 40,000

F1 · price: This transaction was executed in multiple trades ranging from $22.515 to $22.539. The price reported above reflects the average weighted purchase 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.

SEC source: 0001209191-16-146546 · doc4.xml · derivative · entry 3

VARILEK JAMES A · CIK 0001654938 · President, CAV & Services

10b5-1 filing: Not disclosed

Ownership: Indirect · By Dow ESOP Trustee

Disclosed balance after: 0

Underlying: Olin Common Stock · 3,542.28 shares

Expires not disclosed

F2 · derivative.exercise_price: Each unit represents one share of Olin common stock. These phantom stock units were in a unitized stock fund, the Olin Stock Fund, held by The Dow Chemical Company (Dow) Employees' Savings Plan (CEOP), a tax conditioned plan. The phantom stock units were acquired in transactions exempt under Rule 16b-3, including 6.28 units acquired since the date of the reporting person's last ownership report. On the transaction date, Dow liquidated the Olin Stock Fund, and replaced the investment with an investment unrelated to Olin. Conversion price is the per share price reported by Dow for plan level transactions in the CEOP.

F2 · kind: Each unit represents one share of Olin common stock. These phantom stock units were in a unitized stock fund, the Olin Stock Fund, held by The Dow Chemical Company (Dow) Employees' Savings Plan (CEOP), a tax conditioned plan. The phantom stock units were acquired in transactions exempt under Rule 16b-3, including 6.28 units acquired since the date of the reporting person's last ownership report. On the transaction date, Dow liquidated the Olin Stock Fund, and replaced the investment with an investment unrelated to Olin. Conversion price is the per share price reported by Dow for plan level transactions in the CEOP.

F2 · price: Each unit represents one share of Olin common stock. These phantom stock units were in a unitized stock fund, the Olin Stock Fund, held by The Dow Chemical Company (Dow) Employees' Savings Plan (CEOP), a tax conditioned plan. The phantom stock units were acquired in transactions exempt under Rule 16b-3, including 6.28 units acquired since the date of the reporting person's last ownership report. On the transaction date, Dow liquidated the Olin Stock Fund, and replaced the investment with an investment unrelated to Olin. Conversion price is the per share price reported by Dow for plan level transactions in the CEOP.

F2 · derivative.exercise_date: Each unit represents one share of Olin common stock. These phantom stock units were in a unitized stock fund, the Olin Stock Fund, held by The Dow Chemical Company (Dow) Employees' Savings Plan (CEOP), a tax conditioned plan. The phantom stock units were acquired in transactions exempt under Rule 16b-3, including 6.28 units acquired since the date of the reporting person's last ownership report. On the transaction date, Dow liquidated the Olin Stock Fund, and replaced the investment with an investment unrelated to Olin. Conversion price is the per share price reported by Dow for plan level transactions in the CEOP.

F2 · derivative.expiration_date: Each unit represents one share of Olin common stock. These phantom stock units were in a unitized stock fund, the Olin Stock Fund, held by The Dow Chemical Company (Dow) Employees' Savings Plan (CEOP), a tax conditioned plan. The phantom stock units were acquired in transactions exempt under Rule 16b-3, including 6.28 units acquired since the date of the reporting person's last ownership report. On the transaction date, Dow liquidated the Olin Stock Fund, and replaced the investment with an investment unrelated to Olin. Conversion price is the per share price reported by Dow for plan level transactions in the CEOP.

SEC source: 0001209191-16-141066 · doc4.xml · derivative · entry 2

Benoist Gray G · CIK 0001373207 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,637.357

Underlying: Common Stock · 76.431 shares

Expires not disclosed

F1 · security: Dividend equivalents credited to the reporting person's account under the Amended and Restated 1997 Stock Plan for Non-employee Directors at $19.785 per share as of 9/9/2016 in exempt transactions.

F2 · derivative.exercise_price: Security converts to common stock on a one-for-one basis.

F2 · price: Security converts to common stock on a one-for-one basis.

F1 · derivative.exercise_date: Dividend equivalents credited to the reporting person's account under the Amended and Restated 1997 Stock Plan for Non-employee Directors at $19.785 per share as of 9/9/2016 in exempt transactions.

F1 · derivative.expiration_date: Dividend equivalents credited to the reporting person's account under the Amended and Restated 1997 Stock Plan for Non-employee Directors at $19.785 per share as of 9/9/2016 in exempt transactions.

SEC source: 0001209191-16-141071 · doc4.xml · derivative · entry 2

SCHULZ PHILIP J · CIK 0001256906 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,637.357

Underlying: Common Stock · 76.431 shares

Expires not disclosed

F1 · security: Dividend equivalents credited to the reporting person's account under the Amended and Restated 1997 Stock Plan for Non-employee Directors at $19.785 per share as of 9/9/2016 in exempt transactions.

F2 · derivative.exercise_price: Security converts to common stock on a one-for-one basis.

F2 · price: Security converts to common stock on a one-for-one basis.

F1 · derivative.exercise_date: Dividend equivalents credited to the reporting person's account under the Amended and Restated 1997 Stock Plan for Non-employee Directors at $19.785 per share as of 9/9/2016 in exempt transactions.

F1 · derivative.expiration_date: Dividend equivalents credited to the reporting person's account under the Amended and Restated 1997 Stock Plan for Non-employee Directors at $19.785 per share as of 9/9/2016 in exempt transactions.

SEC source: 0001209191-16-141068 · doc4.xml · derivative · entry 2

ROMPALA RICHARD M · CIK 0001220620 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,295.157

Underlying: Common Stock · 103.029 shares

Expires not disclosed

F1 · security: Dividend equivalents credited to the reporting person's account under the Amended and Restated 1997 Stock Plan for Non-employee Directors at $19.785 per share as of 9/9/2016 in exempt transactions.

F2 · derivative.exercise_price: Security converts to common stock on a one-for-one basis.

F2 · price: Security converts to common stock on a one-for-one basis.

F1 · derivative.exercise_date: Dividend equivalents credited to the reporting person's account under the Amended and Restated 1997 Stock Plan for Non-employee Directors at $19.785 per share as of 9/9/2016 in exempt transactions.

F1 · derivative.expiration_date: Dividend equivalents credited to the reporting person's account under the Amended and Restated 1997 Stock Plan for Non-employee Directors at $19.785 per share as of 9/9/2016 in exempt transactions.

SEC source: 0001209191-16-146498 · doc4a.xml · derivative · entry 2

VARILEK JAMES A · CIK 0001654938 · President, CAV & Services

10b5-1 filing: Not disclosed

Ownership: Indirect · By Dow ESOP Trustee

Disclosed balance after: 1,905

Underlying: Olin Common Stock · 1,905 shares

Expires not disclosed

F2 · derivative.exercise_price: Phantom stock units in unitized stock fund held by Dow in its 401(k) plan (ESOP), received in exchange for Splitco common stock in connection with the Merger. Each unit represents one share of Olin common stock. These phantom units were originally reported as shares of stock by the reporting person, and this amendment clarifies the nature of the securities held in the Dow ESOP.

F2 · price: Phantom stock units in unitized stock fund held by Dow in its 401(k) plan (ESOP), received in exchange for Splitco common stock in connection with the Merger. Each unit represents one share of Olin common stock. These phantom units were originally reported as shares of stock by the reporting person, and this amendment clarifies the nature of the securities held in the Dow ESOP.

F2 · derivative.exercise_date: Phantom stock units in unitized stock fund held by Dow in its 401(k) plan (ESOP), received in exchange for Splitco common stock in connection with the Merger. Each unit represents one share of Olin common stock. These phantom units were originally reported as shares of stock by the reporting person, and this amendment clarifies the nature of the securities held in the Dow ESOP.

F2 · derivative.expiration_date: Phantom stock units in unitized stock fund held by Dow in its 401(k) plan (ESOP), received in exchange for Splitco common stock in connection with the Merger. Each unit represents one share of Olin common stock. These phantom units were originally reported as shares of stock by the reporting person, and this amendment clarifies the nature of the securities held in the Dow ESOP.

SEC source: 0001209191-16-146498 · doc4a.xml · nonDerivative · entry 1

VARILEK JAMES A · CIK 0001654938 · President, CAV & Services

10b5-1 filing: Not disclosed

Ownership: Indirect · By Family Trust

Disclosed balance after: 6,778

F1 · price: Shares received in exchange for Blue Cube Splitco Inc. (Splitco) common stock, in connection with the merger of a wholly owned subsidiary of issuer into Splitco (the Merger). Splitco stock was acquired in the exchange offer (Exchange Offer) made by The Dow Chemical Company (Dow). Under the terms of the Merger, each share of Splitco common stock was converted into the right to receive 0.87482759 shares of Olin common stock. The number of shares of Splitco common stock and number of shares of Olin common stock reported represent estimates subject to change as a result of the final proration factor to be announced by Dow. The reporting person undertakes to amend this report upon the determination of the final proration factor. The closing price of Olin's common stock on the effective date of the Merger was $17.94 per share.

SEC source: 0001209191-16-155481 · doc4a.xml · nonDerivative · entry 1

SAMPSON JOHN MAURICE · CIK 0001655048 · VP - M&E, CAV/EPOXY/GCO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,454

F1 · shares: The number of shares reported in this column reflects the results of the final proration factor announced by The Dow Chemical Company and supersedes the estimated number of shares reported in the filing made by the reporting person on October 7, 2015.

F2 · price: Shares received in exchange for Blue Cube Splitco Inc. (Splitco) common stock, in connection with the merger of a wholly owned subsidiary of issuer into Splitco (the Merger). Splitco stock was acquired in the exchange offer (Exchange Offer) made by The Dow Chemical Company (Dow). Under the terms of the Merger, each share of Splitco common stock converted into the right to receive 0.87482759 shares of Olin common stock.

F3 · balance_after: Due to a clerical error, 10,523 of these shares were incorrectly reported as indirectly owned by the Dow ESOP Trustee and the total ownership was overstated by 1,931 shares in the original filing and in the two Form 4s filed by the reporting person after November 5, 2015.

SEC source: 0001209191-17-060649 · doc4a.xml · nonDerivative · entry 1

SAMPSON JOHN MAURICE · CIK 0001655048 · SVP, Business Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,931.31

F1 · shares: Due to a clerical error, 0.31 shares were inadvertently excluded from this figure in the filing made by the reporting person on October 7, 2015 and all subsequent Form 4 filings.

F2 · price: Shares received in exchange for Blue Cube Splitco Inc. (Splitco) common stock, in connection with the merger of a wholly owned subsidiary of issuer into Splitco (the Merger). Splitco stock was acquired in the exchange offer (Exchange Offer) made by The Dow Chemical Company (Dow). Under the terms of the Merger, each share of Splitco common stock converted into the right to receive 0.87482759 shares of Olin common stock.