(SXI)

Role: President/CEO/Chairman, Director
Signature: /s/ Alan J. Glass
Issuer symbol: SXI
Transactions as of: 17 Feb 2026
Net transactions value: -$3,839,150
Form type: 4
Filing time: 18 Feb 2026, 14:01:45 UTC
Previous filing: 17 Oct 2025
Next filing: 12 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Dunbar David A.	President/CEO/Chairman, Director	23 KEEWAYDIN DRIVE, SUITE 300, SALEM	/s/ Alan J. Glass	18 Feb 2026	0001595316

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SXI	Common Stock	Sale	$2,559,800	-10,000	-9.6%	$255.98	93,973	17 Feb 2026	Trustee of Trust	F1, F2
transaction	SXI	Common Stock	Sale	$1,279,350	-5,000	-5.3%	$255.87	88,973	17 Feb 2026	Trustee of Trust	F1, F2
holding	SXI	Common Stock						1,430	17 Feb 2026	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

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).

Explanation of Responses:

Id	Content
F1	Sale of stock pursuant to existing 10b5-1 trading plan dated November 12, 2025.
F2	The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $252.78 to $260.81, inclusive. The reporting person undertakes to provide to the staff of the Securities and Exchange Commission, the Corporation or any security holder of the Corporation, upon request, full information regarding the number of shares sold at each separate price.

Content

Sale of stock pursuant to existing 10b5-1 trading plan dated November 12, 2025.

The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $252.78 to $260.81, inclusive. The reporting person undertakes to provide to the staff of the Securities and Exchange Commission, the Corporation or any security holder of the Corporation, upon request, full information regarding the number of shares sold at each separate price.