PVC BUBBLEGUM 38 57130GNS SUPER FUCHSIA 3 PP FR 8-6 LMS-1000

Geon(TM) MB2855 GRAY 38 Hard SIENNA 3 PP FR 8-6 LMS-1000

38 SSJ LDPE RASPBERRY X GT-26261-002-3 PP FR 8-6 LMS-1000

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You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. I N V E S T O R D A Y A G E N D A M A Y 1 0 , 2 0 1 8 PolyOne Corporation 5 8:00 WELCOME BREAKFAST 9:00 Introduction: Bob Patterson 9:45 Investing for Growth: Michael Garratt Commercial Resources Innovation Service 10:15 SEGMENT REVIEWS PolyOne Distribution: Scott Horn Specialty Engineered Materials: Michael Garratt BREAK (10 MINUTES) SEGMENT REVIEWS (CONTINUED) Performance Products & Solutions: Don Wiseman Color, Additives & Inks: Mark Crist 11:40 Mergers & Acquisitions: Joel Rathbun 12:00 Financial Review: Brad Richardson 12:20 Conclusion/Q&A: Bob Patterson 1:00 LUNCH Bradley C. Investor Day Deck - Web Investor Day Forward �Looking �Statements Factors that could cause actual results to differ materially from those implied by these forward-looking statements include, but are not limited to: USE OF �NON-GAAP�MEASURES Investor Day Agenda May 10, 2018 The Leaders Behind the Team Introduction Historic Past Sustainability AT PolyOne Safety First the PolyOne Academy Sustainably Impacting diverse End Markets Products and Portfolio Optimization OUR PLANET Sustainability AT PolyOne Adjusted EPS Expansion Early years defined by Specialty �mix improvement Commodity Pruning �Held Organic Sales Flat Investment in Commercial Resources Driving Results Sustainable Path to Double-Digit EPS Growth Raising the Bar�ROIC drives shareholder return Commercial Excellence STRATEGIC INVESTMENT IN 3 KEY AREAS Key Commercial Investments New Resources Fueling the Future Aligning with trends for Growth Innovation 3 Horizons of Development 3 Horizons of Development 3 Horizons of Development Innovation Pipeline Innovation Drives Earnings Growth IQ DESIGN LABS 3D Printing�Bringing New ideas to life LSS CUSTOMER FIRST The Evolving Customer Relationship Slide Number 37 Inspired future Innovating with PolyOne PolyOne Distribution DISTRIBUTION Service is our business Service is our business Key Commercial Investments Growth through Inside Sales Growth through Multiple Sales Channels New Resources Fueling the Future Inspired future Specialty Engineered Materials Specialty Engineered Materials Specialty Engineered Materials Capitalizing on the global market STRATEGIC INVESTMENT IN 3 KEY AREAS Key Commercial Investments New Resources Fueling the Future growth Through Service Innovation Spotlight: Composites Composites Refresher Strategic Investment History COMPOSITES in Transportation Slide Number 61 Inspired future Performance Products �& Solutions Performance Products & Solutions Performance Products & Solutions STRATEGIC INVESTMENT IN 3 KEY AREAS Key Commercial Investments New Resources Fueling the Future Growth Through Service Growth Through Service Innovation Spotlight: �Flame Retardant�Polymers FLAME RETARDANT �DRIVERS Flame Retardant Performance Spectrum LED Solutions Inspired future Color Additives�& Inks COLOR, ADDITIVES & INKS Color, Additives & Inks Capitalizing on the global market STRATEGIC INVESTMENT IN 3 KEY AREAS Key Commercial Investments New Resources Fueling the Future Growth Through Service Innovation Spotlight: Additive & Colorant�Technologies Barrier Technologies Fiber Colorants Strategic Investment History Slide Number 88 Slide Number 89 COLORMATRIX SELECT™ Enabling the Customer Slide Number 92 Inspired future M&A Review Over a decade of successful specialty acquisitions Invest-to-Grow Strategy Invest-to-Grow Playbook Invest-to-Grow Proof of performance Invest-to-Grow Proof of performance Invest-to-Grow Driving the future Invest-to-Grow Driving the future Strong Pipeline�driven by fragmented Market Summary Financial Review Adjusted EPS Expansion Strategic cash deployment Proof of Performance �Expanding Margins & ROIC Investment in Commercial Resources Driving Results Sustainable Path to Double-Digit EPS Growth ROIC drives shareholder return ROIC drives shareholder return Conclusion Investor Presentation - May 2018 Non-GAAP Investor Presentation - March 2018

The new patent-pending sensor weighs 38% less than the legacy metal design and is easier to assemble.

Achieved 21st consecutive quarter of strong double-digit adjusted EPS growth Adjusted earnings per share increased 38% to $0.36 for the fourth quarter of 2014, from $0.26 in the fourth quarter of 2013. Attachment 3

You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. Forward Looking Statements POLYONE CORPORATION 3  This presentation includes the use of both GAAP (generally accepted accounting principles) and non-GAAP financial measures. PolyOne �Investor Presentation Slide Number 2 Slide Number 3 Slide Number 4 Slide Number 5 Slide Number 6 Slide Number 7 Slide Number 8 Slide Number 9 Slide Number 10 Slide Number 11 Slide Number 12 Slide Number 13 Slide Number 14 Slide Number 15 Slide Number 16 Slide Number 17 Slide Number 18 Slide Number 19 Slide Number 20 Slide Number 21 Slide Number 22 Slide Number 23 Slide Number 24 Slide Number 25 Slide Number 26 Slide Number 27 Slide Number 28 Slide Number 29 Slide Number 30 Slide Number 31 Slide Number 32 Investor Presentation - March 2018 r4.pdf Investor Presentation - March 2018

You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. U S E O F N O N - G A A P M E A S U R E S PolyOne Corporation 3 • This presentation includes the use of both GAAP (generally accepted accounting principles) and non-GAAP financial measures. Investor Presentation for Website PolyOne investor presentation Forward Looking Statements USE OF �NON-GAAP�MEASURES Vision Safety First PolyOne�2017 Revenue | $3.2 billion Proof of Performance Sustainable Path to Double-Digit EPS Growth Investment in Commercial Resources driving growth The Evolving Customer Relationship Slide Number 11 New Resources Fueling the Future Aligning with trends for Growth Innovation 3 Horizons of Development Innovation Pipeline Innovation Spotlight: Composites Composites Refresher Strategic Investment History COMPOSITES in Transportation Invest-to-Grow M&A Strategy Invest-to-Grow M&A Playbook Invest-to-Grow Proof of performance Invest-to-Grow Driving the future Strong Pipeline�driven by fragmented Market Returning cash to shareholders�Over $1 Billion since 2011 ROIC drives shareholder return Why Invest In PolyOne?

Figure 6 provides an illustration of appropriate venting. 12 11 10 9 8 7 6 5 4 3 2 1 Figure 5. Runner system with cold slug well. 3 12 4 6 7 8 9 10 1112 13 1415 16 5 2 3 4 5 6 7 8 9 10 11 12 1314 15 16 1 Figure 4. Runner system with cold slug well. 3 12 4 6 7 8 9 10 1112 13 1415 16 5 2 3 4 5 6 7 8 9 10 11 12 1314 15 16 1 Figure 4.