Olin (NYSE: OLN) awards stock units to chief legal officer Angela Castle

Rhea-AI Filing Summary

OLIN Corp reported that Angela M. Castle, its VP & Chief Legal Officer, acquired equity awards on February 18, 2026. She received 16,007 restricted stock units, each representing a contingent right to one share of Olin common stock, and a separate award of 26 shares of common stock, both at no cash cost.

The restricted stock units vest in three annual installments beginning on February 18, 2027, tying part of her compensation to Olin’s future performance and continued service. Following these awards, she directly holds 1,530 shares of common stock. Separately, 2.4123 shares are held indirectly under the Olin Corporation Retirement Savings Plan by the RSP trustee as of February 20, 2026.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Castle Angela M

Role VP & Chief Legal Officer

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	16,007	$0.00	--
Grant/Award	Common Stock	26	$0.00	--
holding	Common Stock	--	--	--

Holdings After Transaction: Restricted Stock Units — 16,007 shares (Direct); Common Stock — 1,530 shares (Direct); Common Stock — 2.412 shares (Indirect, By RSP Trustee)

Footnotes (1)

1. The figure represents shares of Olin Common Stock held under the Olin Corporation Retirement Savings Plan, a tax conditioned plan reflecting transactions exempt under Rule 16b-3, as reported by the RSP Plan Administrator as of February 20, 2026. Each restricted stock unit represents a contingent right to receive one share of Olin Common Stock. These restricted stock units vest in three annual installments beginning on February 18, 2027.

Form 4 Insider Transactions: What Each Field Means →

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Castle Angela M

(Last) (First) (Middle)

16290 KATY FREEWAY

600

(Street)

HOUSTON TX 77094

(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 & Chief Legal Officer

3. Date of Earliest Transaction (Month/Day/Year)
02/18/2026

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	02/18/2026		A		26	A	$0	1,530	D
Common Stock								2.4123(1)	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
Restricted Stock Units	(2)	02/18/2026		A		16,007		(3)	(3)	Common Stock	16,007	$0	16,007	D

Explanation of Responses:

1. The figure represents shares of Olin Common Stock held under the Olin Corporation Retirement Savings Plan, a tax conditioned plan reflecting transactions exempt under Rule 16b-3, as reported by the RSP Plan Administrator as of February 20, 2026.

2. Each restricted stock unit represents a contingent right to receive one share of Olin Common Stock.

3. These restricted stock units vest in three annual installments beginning on February 18, 2027.

Remarks:

	/s/ E.C Tanner, Attorney-in-Fact	02/20/2026
	** 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 equity awards did Angela M. Castle report at Olin (OLN)?

Angela M. Castle reported receiving 16,007 restricted stock units and 26 shares of Olin common stock on February 18, 2026. These awards are equity-based compensation, granted at no cash cost, and increase her direct and incentive-linked stake in the company.

How do Angela M. Castle’s Olin (OLN) restricted stock units vest?

The 16,007 restricted stock units vest in three annual installments beginning on February 18, 2027. Each unit represents a contingent right to receive one share of Olin common stock, aligning a portion of her compensation with long-term company performance and continued employment.

How many Olin (OLN) common shares does Angela M. Castle hold after these transactions?

After the February 18, 2026 awards, Angela M. Castle directly holds 1,530 shares of Olin common stock. In addition, 2.4123 shares are held indirectly for her benefit under the Olin Corporation Retirement Savings Plan, as reported by the plan administrator.

What is the significance of the Olin Corporation Retirement Savings Plan in this Form 4?

The Retirement Savings Plan holds 2.4123 shares of Olin common stock for Angela M. Castle, reported as indirect ownership by the RSP trustee as of February 20, 2026. These plan-held shares are part of her overall beneficial interest in the company’s stock.

Did Angela M. Castle buy or sell Olin (OLN) stock on the market in this filing?

No market purchases or sales are reported. The Form 4 shows equity awards classified as acquisitions through grants: 16,007 restricted stock units and 26 shares of common stock. There are no open-market buy or sell transactions disclosed in this filing.