FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * VARILEK JAMES A   2. Issuer Name and Ticker or Trading Symbol OLIN CORP [OLN] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President, CAV & Services (Last) (First) (Middle) OLIN CORPORATION, 190 CARONDELET PLAZA, SUITE 1530 3. Date of Earliest Transaction (Month/Day/Year) 10/05/2015 (Street) CLAYTON, MO 63105 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock $1 par value 10/05/2015   A   6,778 A (1) 6,778 I By Family Trust Common Stock $1 par value 10/05/2015   A   1,905 A (1) 1,905 I By Dow ESOP Trustee

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
VARILEK JAMES A OLIN CORPORATION 190 CARONDELET PLAZA, SUITE 1530 CLAYTON, MO 63105			President, CAV & Services

Signatures

/s/ T. E. Murphy, Attorney-in-Fact		10/07/2015
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	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. 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.

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