OLN Olin Corp

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                                                                                   
OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response... 0.5                       
Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940                       

1. Name and Address of Reporting Person * Sumner R Nichole	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) VP & Controller
(Last)          (First)          (Middle) C/O OLIN CORPORATION, 190 CARONDELET PLZ, STE 1530	3. Date of Earliest Transaction (MM/DD/YYYY) 5/24/2021
(Street) CLAYTON, MO 63105 (City)        (State)        (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. 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	5/24/2021		M		6807	A	$27.65	15431	D
Common Stock $1 par value	5/24/2021		S		6807	D	$48	8624	D
Common Stock $1 par value	5/25/2021		M		693	A	$27.65	9317	D
Common Stock $1 par value	5/25/2021		S		693	D	$48	8624	D
Common Stock $1 par value								8657.4753 (1)	I	By ESOP Trustee

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. 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		7. Title and Amount of Securities Underlying Derivative Security (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
Employee Stock Options (Right to Buy)	$27.65	5/24/2021		M			6807	5/5/2015 (2)	5/4/2024	Common Stock $1 par value	6807.0	$0	693	D
Employee Stock Options (Right to Buy)	$27.65	5/25/2021		M			693	5/5/2015 (2)	5/4/2024	Common Stock $1 par value	693.0	$0	0	D

Explanation of Responses:
(1)	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 15, 2021.
(2)	The option vested in three equal annual installments on May 5, 2015, 2016 and 2017.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Sumner R Nichole C/O OLIN CORPORATION 190 CARONDELET PLZ, STE 1530 CLAYTON, MO 63105			VP & Controller

Signatures
/s/ T. E. Murphy, Attorney-in-Fact		5/26/2021
**Signature of Reporting Person		Date