Olin (OLN) VP & Controller Nichole Sumner exercises options and sells 4,750 shares

Rhea-AI Filing Summary

Olin Corporation vice president and controller Nichole Sumner reported option exercises and share sales. On February 3, 2026, she exercised employee stock options for 4,750 shares of common stock at $13.14 per share, then sold 4,750 shares of common stock the same day at a weighted average price of $22.4939 per share. After these transactions, she directly owned 24,771 shares of Olin common stock and indirectly held 9,452.6705 shares through the Olin Corporation Retirement Savings Plan as of February 3, 2026.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Sumner R Nichole

(Last) (First) (Middle)

C/O OLIN CORPORATION

190 CARONDELET PLZ, STE 1530

(Street)

CLAYTON MO 63105

(City) (State) (Zip)

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

3. Date of Earliest Transaction (Month/Day/Year)
02/03/2026

4. If Amendment, Date of 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

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	02/03/2026		M		4,750	A	$13.14	29,521	D
Common Stock	02/03/2026		S		4,750	D	$22.4939(1)	24,771	D
Common Stock								9,452.6705(2)	I	By RSP Trustee

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 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: 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)	$13.14	02/03/2026		M			4,750	02/12/2017(3)	02/12/2026	Common Stock	4,750	$0	0	D

Explanation of Responses:

1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.48 to $22.52, inclusive. The reporting person undertakes to provide to Olin Corporation, any security holder of Olin Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote 1 to this Form 4.

2. The figure represents shares of Olin Common Stock held under the Olin Corporation Retirement Savings Plan (RSP), a tax conditioned plan reflecting transactions exempt under Rule 16b-3, as reported by the RSP Plan Administrator as of February 3, 2026.

3. The option vested in three equal annual installments on February 12, 2017, 2018 and 2019.

Remarks:

	/s/ E.C. Tanner, Attorney-in-Fact	02/05/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did Nichole Sumner report at Olin (OLN)?

Nichole Sumner, Olin’s vice president and controller, reported exercising employee stock options for 4,750 shares and selling 4,750 common shares on February 3, 2026. These transactions are disclosed in a Form 4 insider trading report filed with the Securities and Exchange Commission.

At what prices did Nichole Sumner exercise and sell Olin (OLN) shares?

She exercised employee stock options for 4,750 Olin common shares at $13.14 per share, then sold 4,750 shares at a weighted average price of $22.4939 per share. The sale occurred in multiple trades between $22.48 and $22.52 per share.

How many Olin (OLN) shares does Nichole Sumner own after this Form 4?

After the reported transactions, Nichole Sumner directly owned 24,771 shares of Olin common stock. She also indirectly held 9,452.6705 additional shares through the Olin Corporation Retirement Savings Plan as reported by the plan administrator as of February 3, 2026.

What happened to Nichole Sumner’s employee stock options in this Olin (OLN) filing?

She exercised 4,750 employee stock options with a $13.14 exercise price, converting them into 4,750 shares of Olin common stock. The options, which vested in three annual installments beginning February 12, 2017, were fully exercised, leaving zero derivative securities from this grant.

What does the weighted average sale price mean in the Olin (OLN) Form 4?

The weighted average price of $22.4939 reflects multiple sale transactions of Olin shares executed between $22.48 and $22.52 per share. The insider notes a willingness to provide detailed trade-by-trade pricing information to the company, shareholders, or SEC staff upon request.