[Form 4] Solstice Advanced Materials Inc. Insider Trading Activity

Rhea-AI Filing Summary

Solstice Advanced Materials Inc. senior vice president Mawson Simon reported several equity compensation moves. On February 24, 2026, he received a grant of 6,048 restricted stock units (RSUs), each representing a right to one common share, with vesting from 2027 to 2029 subject to continued employment. On February 23, 2026, earlier RSUs vested and 2,045 common shares were issued upon RSU conversion, while 952 shares were withheld at $79.29 per share to cover taxes. The filing also shows multiple RSU awards and stock options that vest in stages between 2026 and 2029, tying a portion of his compensation to future service and the company’s share performance.

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^*

Mawson Simon

(Last) (First) (Middle)

C/O SOLSTICE ADVANCED MATERIALS INC.

115 TABOR ROAD

(Street)

MORRIS PLAINS NJ 07950

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Solstice Advanced Materials Inc. [ SOLS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Elec & Spec Materials

3. Date of Earliest Transaction (Month/Day/Year)
02/23/2026

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	02/23/2026		M		2,045	A	(1)	2,209(2)	D
Common Stock	02/23/2026		F		952(3)	D	$79.29	1,257	D

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	(1)	02/23/2026		M			2,045	(4)	(4)	Common Stock	2,045	$0	0	D
Restricted Stock Units	(1)	02/24/2026		A		6,048		(5)	(5)	Common Stock	6,048	$0	6,048	D
Restricted Stock Units	(1)							(6)	(6)	Common Stock	19,724		19,724	D
Restricted Stock Units	(1)							(7)	(7)	Common Stock	2,036		2,036	D
Restricted Stock Units	(1)							(8)	(8)	Common Stock	4,755		4,755	D
Restricted Stock Units	(1)							(9)	(9)	Common Stock	1,939		1,939	D
Restricted Stock Units	(1)							(10)	(10)	Common Stock	6,779		6,779	D
Restricted Stock Units	(1)							(11)	(11)	Common Stock	6,884		6,884	D
Stock Option (Right to buy)	$43.65							(12)	06/12/2032	Common Stock	2,507		2,507	D
Stock Option (Right to buy)	$46.03							(13)	02/22/2033	Common Stock	4,833		4,833	D
Stock Option (Right to buy)	$46.79							(14)	02/28/2034	Common Stock	7,691		7,691	D
Stock Option (Right to buy)	$50.59							(15)	03/02/2035	Common Stock	9,312		9,312	D

Explanation of Responses:

1. Each restricted stock unit ("RSU") represents a contingent right to receive one share of Solstice Advanced Materials Inc. (the "Issuer") common stock.

2. Includes shares received in connection with the spin-off of the Issuer from Honeywell International Inc.

3. Represents shares withheld for taxes upon vesting of RSUs.

4. The RSUs vested on February 23, 2026.

5. The RSUs will vest 33% on each of February 24, 2027 and February 24, 2028, and 34% on February 24, 2029, subject to continued employment.

6. The RSUs will vest in equal installments on each of October 30, 2028 and October 30, 2029, subject to continued employment.

7. The RSUs will vest on March 1, 2027, subject to continued employment.

8. The RSUs will vest 2,342 on August 1, 2026 and 2,413 on August 1, 2027, subject to continued employment.

9. The RSUs will vest on March 3, 2028, subject to continued employment

10. The RSUs will vest 2,237 on March 3, 2027, 2,237 on March 3, 2028 and 2,305 on March 3, 2029, subject to continued employment.

11. The RSUs will vest in equal installments on each of March 17, 2027 and March 17, 2028, subject to continued employment.

12. Options vest and become exercisable on June 13, 2026.

13. Options vest and become exercisable in equal installments on each of February 23, 2026 and February 23, 2027.

14. Options vest and become exercisable in three equal installments on each of March 1, 2026, March 1, 2027 and March 1, 2028.

15. Options vest and become exercisable in four equal installments on each of March 3, 2026, March 3, 2027, March 3, 2028 and March 3, 2029.

Remarks:

	/s/ Jay Shah for Simon Mawson	02/25/2026
	** Signature of Reporting Person	Date
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