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PLEXUS CONFIDENTIAL FISCAL THIRD QUARTER 2026 HIGHLIGHTS July 29, 2026 1
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PLEXUS CONFIDENTIAL Some of the statements made and information provided during our call as well as information included in the supporting materials will be forward looking statements, including, without limitation, those regarding revenue, gross margin, selling and administrative expense, operating margin, other income and expense, taxes, cash cycle, capital allocation and future business outlook. Forward-looking statements are not guarantees since there are inherent difficulties in predicting future results, and actual results could differ materially from those expressed or implied in the forward-looking statements. For a list of factors that could cause actual results to differ materially from those discussed, please refer to the Company’s periodic SEC filings, particularly the risk factors in our Form 10-K filing for the fiscal year ended September 27, 2025, as supplemented by the Safe Harbor and Fair Disclosure statement in our press release detailing our quarterly results. SAFE HARBOR AND FAIR DISCLOSURE STATEMENT 2
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PLEXUS CONFIDENTIAL OUR VISION WE HELP CREATE THE PRODUCTS THAT BUILD A BETTER WORLD OUR MISSION THE LEADER IN HIGHLY COMPLEX PRODUCTS AND DEMANDING REGULATORY ENVIRONMENTS FISCAL THIRD QUARTER THEMES F26 Y/Y revenue growth forecast of 20%+. F27 revenue growth expected to exceed 9-12% goal. F26 operating margin of >6% with an expectation for continued operating margin expansion in F27. Sustained robust working capital efficiency with significant revenue growth. 3
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PLEXUS CONFIDENTIAL FINANCIAL RESULTS *Excludes stock-based compensation expense ● Record revenue exceeded guidance ● 12% sequential and 28% year-over-year revenue growth ● 6.3% non-GAAP operating margin ● Non-GAAP EPS of $2.32 exceeded guidance 4
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PLEXUS CONFIDENTIAL WINS AND FUNNEL HIGHLIGHTS ● Strong Q3F26 wins of $255 million, with continued robust win activity in Aerospace/Defense ● Record funnel of qualified manufacturing opportunities 5 * *Inclusive of sustaining services
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PLEXUS CONFIDENTIAL SUSTAINABILITY | Q3F26 HIGHLIGHTS ● ASM Supplier Performance Award for Overall Supplier Excellence and ASM PRISM Sustainability Award for Circularity ● Gold Award for Renewable Energy at the Positive Impact Awards in Malaysia for Plexus’ commitment to renewable energy ● Annual Sustainability Report showcases commitment to innovating responsibly and establishes Plexus’ greenhouse gas emission reduction targets INNOVATING RESPONSIBLY FOR AND THROUGH OUR PEOPLE, OUR SOLUTIONS & OUR OPERATIONS - BUILT ON A FOUNDATION OF TRUST & TRANSPARENCY - 6 DELIVERING EXCELLENCE CELEBRATING OUR GOLD AWARD FOR RENEWABLE ENERGY
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PLEXUS CONFIDENTIAL FINANCIAL GUIDANCE ● Q4F26 revenue of $1.330 billion to $1.380 billion ● Q4F26 non-GAAP EPS of $2.47 to $2.63 ● F26 revenue growth of 20%+ ● F26 non-GAAP operating margin of 6%+ ● Disciplined working capital efficiency *Excludes stock-based compensation expense **Represents midpoint of guidance 7
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PLEXUS CONFIDENTIAL MARKET SECTOR PERFORMANCE - AEROSPACE/DEFENSE ● Wins highlights: ○ European and U.S. defense and security communications solution ○ Submarine electronics system ○ Continued robust engineering wins Q4F26 Expectations Approximately flat ● Q3F26 beat guidance on broad demand strength and strong Plexus operational performance ● F26 revenue growth of 20%+ led by robust defense demand ● F27 revenue growth well in excess of 9-12% on broad-based demand strength and program ramps 8 Q3F26 vs. Q2F26 + 10%
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PLEXUS CONFIDENTIAL MARKET SECTOR PERFORMANCE - HEALTHCARE/LIFE SCIENCES Q4F26 Expectations Approximately flat Q3F26 vs. Q2F26 + 2% ● Q3F26 beat guidance ● Program ramps continue for Q4F26 ● High teens F26 revenue growth ● Mid-single digit F27 revenue growth as program ramp activity normalizes 9 ● Wins highlights: ○ Robotic surgical instruments in support of an existing customer program ○ Global footprint drove market share gain with long-standing imaging partner ○ Expanded relationship with leading patient monitoring company
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PLEXUS CONFIDENTIAL ● Q3F26 beat guidance ● Robust Q4F26 outlook on continued semicap and industrial demand expansion and program ramps ● F26 revenue growth of 20%+ ● F27 revenue growth well in excess of 9-12% on broad-based subsector demand strength MARKET SECTOR PERFORMANCE - INDUSTRIAL Q4F26 Expectations Up high single to low double digits Q3F26 vs. Q2F26 + 23% 10 ● Wins highlights: ○ New customer supporting battery energy storage systems for data centers ○ Follow-on award with vehicle imaging and inspection customer
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PLEXUS CONFIDENTIAL Record Funnel 11 QUALIFIED MANUFACTURING FUNNEL TRENDS * *Inclusive of sustaining services
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PLEXUS CONFIDENTIAL INCOME STATEMENT Q3F25 Q2F26 Q3F26 Actual Q3F26 Guidance Revenue $1.018 billion $1.164 billion $1.305 billion $1.200 billion to $1.250 billion Gross margin 10.1% 10.2% 10.1% 9.9% to 10.2% Selling & administrative expense * $49.7 million $57.3 million $70.1 million $69.0 to $70.0 million GAAP operating margin * 5.3% 5.3% 4.7% 4.1% to 4.5% Non-GAAP operating margin 6.0% 6.0% 6.3% 5.9% to 6.3% Non-operating expense $3.8 million $4.0 million $4.8 million Approximately $5.4 million GAAP diluted EPS * $1.64 $1.82 $1.58 $1.25 to $1.41 Non-GAAP diluted EPS $1.90 $2.05 $2.32 $2.02 to $2.18 *Includes stock-based compensation expense12
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PLEXUS CONFIDENTIAL CASH FLOW AND BALANCE SHEET Q3F25 Q2F26 Q3F26 Free cash flow $13.2 million $16.0 million ($0.7) million Share repurchases $18.4 million $20.6 million $20.6 million Cash balance $238 million $303 million $315 million Total debt $143 million $234 million $275 million Return on invested capital 14.1% 13.8% 14.9% Cash cycle days 69 days 64 days 62 days 13
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PLEXUS CONFIDENTIAL WORKING CAPITAL TRENDS Q3F25 Q4F25 Q1F26 Q2F26 Q3F26 Days in Accounts Receivable 59 57 58 55 56 Days in Contract Assets 13 13 13 12 13 Days in Inventory 128 118 124 120 116 Days in Accounts Payable 72 70 71 74 76 Days in Advanced Payments 59 55 55 49 47 Net Cash Cycle Days 69 63 69 64 62 14
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PLEXUS CONFIDENTIAL FISCAL FOURTH QUARTER 2026 GUIDANCE Q4F25 Q3F26 Q4F26 Guidance Revenue $1.058 billion $1.305 billion $1.330 billion to $1.380 billion GAAP diluted EPS * $1.87 $1.58 $2.18 to $2.34 Non-GAAP diluted EPS $2.14 $2.32 $2.47 to $2.63 Gross margin 9.9% 10.1% 10.0% to 10.3% Selling & administrative expense * $51.7 million $70.1 million $57.5 to $58.5 million GAAP operating margin * 5.0% 4.7% 5.5% to 5.9% Non-GAAP operating margin 5.8% 6.3% 6.1% to 6.5% Depreciation and amortization $19.3 million $18.9 million Approximately $20 million Non-operating expense $3.4 million $4.8 million Approximately $6.3 million Non-GAAP effective tax rate (2%) 18% 12% to 14% Diluted weighted average shares outstanding 27.4 million 27.3 million 27.2 million Cash cycle days 63 62 62 to 66 days *Includes stock-based compensation expense15
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PLEXUS CONFIDENTIAL Q&A Thank you. 16