PLXS

EX-99.1

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Plexus Announces Fiscal Third Quarter Financial Results

NEENAH, WI – July 29, 2026 - Plexus Corp. (NASDAQ: PLXS) today announced financial results for our fiscal third quarter ended July 4, 2026, and guidance for our fiscal fourth quarter ending October 3, 2026.

•Reports record fiscal third quarter 2026 revenue of $1.305 billion, GAAP operating margin of 4.7% and GAAP diluted EPS of $1.58.

•Reports fiscal third quarter 2026 non-GAAP operating margin of 6.3% and non-GAAP diluted EPS of $2.32, excluding $0.74 of stock-based compensation expense.

•Initiates fiscal fourth quarter 2026 revenue guidance of $1.330 billion to $1.380 billion with GAAP diluted EPS of $2.18 to $2.34, including $0.29 of stock-based compensation expense. Fiscal fourth quarter non-GAAP EPS guidance of $2.47 to $2.63 excludes stock-based compensation expense.

Three Months Ended

July 4, 2026July 4, 2026Oct 3, 2026

Q3F26 Results

Q3F26 Guidance

Q4F26 Guidance

Summary GAAP Items

Revenue (in billions)$1.305$1.200 to $1.250$1.330 to $1.380

Operating margin4.7 %4.1% to 4.5%5.5% to 5.9%

Diluted EPS$1.58$1.25 to $1.41$2.18 to $2.34

Summary Non-GAAP Items (1)

Adjusted operating margin (2)6.3 %5.9% to 6.3%6.1% to 6.5%

Adjusted EPS (3)$2.32$2.02 to $2.18$2.47 to $2.63

Return on invested capital (ROIC)14.9 %

Economic return 5.9 %

(1)Refer to Non-GAAP Supplemental Information tables for additional information regarding non-GAAP financial measures.

(2) Excludes stock-based compensation expense of approximately 160 bps for Q3F26 results, 180 bps for Q3F26 guidance and 60 bps for Q4F26 guidance.

(3) Excludes stock-based compensation expense, net of tax, of $0.74 for Q3F26 results, $0.77 for Q3F26 guidance and $0.29 for Q4F26 guidance.

Fiscal Third Quarter 2026 Information

•Won 31 manufacturing programs during the quarter representing $255 million in annualized revenue when fully ramped into production.

•Purchased $20.6 million of our shares at an average price of $258.75 per share under our 2026 Share Repurchase Program, leaving $21.4 million available under our existing $100.0 million authorization.

Todd Kelsey, President and Chief Executive Officer, commented, “Plexus generated record quarterly revenue in the fiscal third quarter by capturing strengthening end market demand and successfully launching numerous new programs. Fiscal third quarter revenue of $1.305 billion exceeded guidance, increasing 12% sequentially and 28% year over year. In addition, non-GAAP operating margin of 6.3% met the high end of guidance, non-GAAP EPS of $2.32 exceeded guidance and we again delivered healthy working capital efficiency.”

Mr. Kelsey added, “Our go-to-market team continued to drive strong performance with quarterly manufacturing wins of $255 million in annualized revenue. This result included significant wins for our Aerospace/Defense market sector as well as a new partnership in our Industrial market sector manufacturing a battery energy storage system for data centers. Furthermore, we expanded our funnel of qualified manufacturing opportunities to $4.5 billion, a record level, supporting the potential to sustain robust long-term revenue growth.”

David Abuhl, Senior Vice President and Chief Financial Officer, commented, “Driven by continued progress on our working capital initiatives, our cash cycle of 62 days exceeded expectations. This outstanding result is the best quarterly cash cycle performance in over five years. In support of accelerating revenue growth, we had a slight usage of free cash flow in the quarter, which was better than our expectations. While we expect to maintain cash cycle days in the low-to-mid 60s for the fiscal fourth quarter, further working capital investments are required to support our substantial revenue growth projections. As such, we now expect a usage of free cash flow for fiscal 2026 with a return to meaningful free cash flow generation in early fiscal 2027.”

Mr. Abuhl continued, “Our favorable cash cycle days, prudent capital expenditures and strong operating performance produced a return on invested capital of 14.9% in the quarter, up 110 basis points versus the prior quarter and 590 basis points above our cost of capital. This result represented the highest return in nearly five years.”

Mr. Kelsey continued, “For our fiscal fourth quarter, we forecast continued revenue growth led by strength in our Healthcare/Life Sciences and Industrial market sectors, including our semiconductor capital equipment subsector. We are guiding revenue of $1.330 to $1.380 billion, up 4% sequentially and 28% year over year at the midpoint, non-GAAP operating margin of 6.1% to 6.5% and non-GAAP EPS of $2.47 to $2.63. For fiscal 2026, we now anticipate generating in excess of 20% revenue growth due to Plexus’ success in launching numerous new programs and our market share gains combined with improved end market demand. Additionally, we expect to deliver this considerable

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Plexus Announces Fiscal Second Quarter Financial Results

NEENAH, WI – April 29, 2026 - Plexus Corp. (NASDAQ: PLXS) today announced financial results for our fiscal second quarter ended April 4, 2026, and guidance for our fiscal third quarter ending July 4, 2026.

•Reports record fiscal second quarter 2026 revenue of $1.164 billion, GAAP operating margin of 5.3% and GAAP diluted EPS of $1.82.

•Reports fiscal second quarter 2026 non-GAAP operating margin of 6.0% and non-GAAP diluted EPS of $2.05, excluding $0.23 of stock-based compensation expense.

•Initiates fiscal third quarter 2026 revenue guidance of $1.200 billion to $1.250 billion with GAAP diluted EPS of $1.25 to $1.41, including $0.77 of stock-based compensation expense. Fiscal third quarter non-GAAP EPS guidance of $2.02 to $2.18 excludes stock-based compensation expense.

Three Months Ended

Apr 4, 2026Apr 4, 2026Jul 4, 2026

Q2F26 Results

Q2F26 Guidance

Q3F26 Guidance

Summary GAAP Items

Revenue (in billions)$1.164$1.110 to $1.150$1.200 to $1.250

Operating margin5.3 %4.9% to 5.3%4.1% to 4.5%

Diluted EPS$1.82$1.53 to $1.68$1.25 to $1.41

Summary Non-GAAP Items (1)

Adjusted operating margin (2)6.0 %5.6% to 6.0%5.9% to 6.3%

Adjusted EPS (3)$2.05$1.80 to $1.95$2.02 to $2.18

Return on invested capital (ROIC)13.8 %

Economic return 4.8 %

(1)Refer to Non-GAAP Supplemental Information tables for additional information regarding non-GAAP financial measures.

(2) Excludes stock-based compensation expense of approximately 70 bps for Q2F26 results and Q2F26 guidance and 180 bps for Q3F26 guidance.

(3) Excludes stock-based compensation expense, net of tax, of $0.23 for Q2F26 results, $0.27 for Q2F26 guidance and $0.77 for Q3F26 guidance.

Fiscal Second Quarter 2026 Information

•Won 30 manufacturing programs during the quarter representing a record $355 million in annualized revenue when fully ramped into production.

•Generated free cash flow of $16.0 million.

•Purchased $20.6 million of our shares at an average price of $189.22 per share under our 2026 Share Repurchase Program, leaving $42.0 million available under our existing $100.0 million authorization.

Todd Kelsey, President and Chief Executive Officer, commented, “Our momentum is accelerating broadly. For the fiscal second quarter, we increased revenue significantly year-over-year, delivered record manufacturing wins, expanded our efficiency efforts and generated robust profitability. We produced record revenue of $1.164 billion, which exceeded our guidance range and increased 19% year-over-year with significant contributions from all market sectors. In addition, non-GAAP operating margin of 6.0% met the high end of guidance, while non-GAAP EPS of $2.05 exceeded guidance.”

Mr. Kelsey added, “Our go-to-market team achieved record quarterly manufacturing wins of $355 million in annualized revenue. This included broad-based programs in aerospace and defense, expanded relationships and share gains in surgical and imaging platforms, a new engagement in data center power solutions and continued share gains in semiconductor capital equipment. While achieving this tremendous wins result, we also expanded our funnel of qualified manufacturing opportunities.”

Patrick Jermain, Executive Vice President and Chief Financial Officer, commented, “Our fiscal second quarter cash cycle of 64 days represented a better-than-expected sequential improvement of 5 days, the benefit of continued progress on working capital initiatives and stronger-than-guided revenue. Our favorable cash cycle combined with our strong operating performance produced a fiscal second quarter return on invested capital of 13.8%, which exceeded our cost of capital by 480 basis points. We also delivered $16 million in free cash flow for the fiscal second quarter, a result that surpassed our projections. We are strategically increasing working capital investments in support of accelerating revenue growth, with an expectation to maintain cash cycle days consistent with our recent performance. As a result, we now expect to generate fiscal 2026 free cash flow in the range of $50 to $75 million.”

Mr. Kelsey continued, “We anticipate continued strong performance for our fiscal third quarter from program ramps, improved end-market demand and our sustained focus on operational efficiency. We are guiding revenue of $1.200 to $1.250 billion, representing 5% sequential and 20% year-over-year growth at the midpoint, non-GAAP operating margin of 5.9% to 6.3% and non-GAAP EPS of $2.02 to $2.18.”

Mr. Kelsey concluded, “Plexus’ consistent focus on redefining excellence through our unmatched quality and delivery is shaping our decision-making and sustaining our tremendous momentum. Leveraging this momentum, and our excellent financial performance year to date, we now expect Plexus to deliver mid-teens or greater fiscal 2026 revenue growth, with robust operating performance.”

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Quarterly Comparison

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): January 28, 2026

PLEXUS CORP.

(Exact name of registrant as specified in its charter)

Wisconsin001-1442339-1344447 (State or other jurisdiction of incorporation)(Commission File Number)(IRS Employer Identification No.)

One Plexus Way Neenah, Wisconsin 54956 (Address of principal executive offices) (Zip Code) Telephone Number (920) 969-6000 (Registrant’s telephone number, including Area Code) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, $0.01 par valuePLXSThe Nasdaq Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company    ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.    ☐

Item 2.02    Results of Operations and Financial Condition.

On January 28, 2026, Plexus Corp. (“we” or the “Company”) announced results for the fiscal first quarter ended January 3, 2026. A copy of the Company’s related press release is furnished as Exhibit 99.1 to this report.

Item 9.01    Financial Statements and Exhibits

(d) The following exhibits are filed herewith:

Exhibit NumberDescription 99.1Press release issued by Plexus Corp., dated January 28, 2026

104Cover Page Interactive Data File (the cover page tags are embedded within the Inline XBRL document)

* * * * *

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: January 28, 2026

PLEXUS CORP.

(Registrant) By: /s/ Patrick J. Jermain

Patrick J. Jermain Executive Vice President and Chief Financial Officer