Michael J. Running - 12 Nov 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
Issuer symbol: PLXS
Transactions as of: 12 Nov 2025
Net transactions value: -$86,282
Form type: 4
Filing time: 14 Nov 2025, 17:11:06 UTC
Previous filing: 02 Jun 2025
Next filing: 03 Feb 2026
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	14 Nov 2025	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		+1,255	+199%		1,885	12 Nov 2025	Direct	F1
transaction	PLXS	Common Stock, $.01 par value	Tax liability	$86,282	-590	-31%	$146.24	1,295	12 Nov 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	+21%		2,025	12 Nov 2025	Common Stock, $.01 par value	345		Direct	F1
transaction	PLXS	Performance Stock Units	Options Exercise		-1,255	-62%		770	12 Nov 2025	Common Stock, $.01 par value	1,255		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.