Michael J. Running - Nov 12, 2025 Form 4 Insider Report for PLEXUS CORP (PLXS)

Role: Regional President - AMER
Signature: /s/ Michael J. Running, by Kate A. Gitter, Attorney-in-Fact
Stock symbol: PLXS
Transactions as of: Nov 12, 2025
Transactions value $: -$86,282
Form type: 4
Date filed: 11/14/2025, 05:11 PM
Previous filing: Jun 2, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Running Michael J.	Regional President - AMER	ONE PLEXUS WAY, NEENAH	/s/ Michael J. Running, by Kate A. Gitter, Attorney-in-Fact	2025-11-14	0002002072

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	PLXS	Common Stock, $.01 par value	Options Exercise		+1.26K	+199.21%		1.89K	Nov 12, 2025	Direct	F1
transaction	PLXS	Common Stock, $.01 par value	Tax liability	-$86.3K	-590	-31.3%	$146.24	1.3K	Nov 12, 2025	Direct

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	PLXS	Performance Stock Units	Award		+345	+20.54%		2.03K	Nov 12, 2025	Common Stock, $.01 par value	345		Direct	F1
transaction	PLXS	Performance Stock Units	Options Exercise		-1.26K	-61.98%		770	Nov 12, 2025	Common Stock, $.01 par value	1.26K		Direct	F1

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

Explanation of Responses:

Id	Content
F1	Based on Company performance during the three-year performance period, 138% of the portion of the Performance Stock Units ("PSUs") granted in fiscal 2023 related to economic return goals vested. The three-year performance period for the portion of the PSUs that vests based on the relative total shareholder return ("TSR") of the Company's common stock as compared to companies in the S&P 400 Index has yet to conclude. As previously disclosed, the reporting person had the opportunity to earn up to 200% of the targeted amount based on ER originally reported and has the opportunity to earn up to 150% of the targeted amount based on TSR originally reported.

Content

Based on Company performance during the three-year performance period, 138% of the portion of the Performance Stock Units ("PSUs") granted in fiscal 2023 related to economic return goals vested. The three-year performance period for the portion of the PSUs that vests based on the relative total shareholder return ("TSR") of the Company's common stock as compared to companies in the S&P 400 Index has yet to conclude. As previously disclosed, the reporting person had the opportunity to earn up to 200% of the targeted amount based on ER originally reported and has the opportunity to earn up to 150% of the targeted amount based on TSR originally reported.