$ D O L L A R S 2007 2008 2009 2010 2011 .25 .50 .75 1.00 1.25 ADJUSTED EARNINGS PER SHARE^ 278% INCREASE SINCE 2007 % O F O P E R A T IN G I N C O M E 2007 2008 2009 2010 2011 20 40 60 80 100 OPERATING MIX SHIFT* JOINT VENTURES PP&S DISTRIBUTION SPECIALT Y P E R C E N TA G E 2007 2008 2009 2010 2011 1.5 3.0 4.5 6.0 7.5 ADJUSTED RETURN ON SALES∆ *Operating Income excludes Corporate Charges OPERATIONAL PERFORMANCE SPECIALTY PLATFORM OPERATING INCOME $ M IL L IO N S 20 40 60 80 100 2007 2008 2009 2010 2011 192% INCREASE SINCE 2007 91% INCREASE SINCE 2007 ^EPS excluding special items and equity income from SunBelt SAFETY — INJURY INCIDENCE RATEº 2007 2008 2009 2010 2011 .25 .50 .75 1.0 1.25 “WORLD-CLASS” PERFORMANCE IN JU R Y IN C ID E N C E R A T E ºNumber of injuries per 100 full-time associates P E R C E N TA G E 2007 2008 2009 2010 2011 4 8 12 16 20 WORKING CAPITAL† — PERCENTAGE OF SALES “BEST-IN-CLASS” WORKING CAPITAL MANAGEMENT † Working capital is defined as accounts receivable plus inventories minus accounts payable ∆Operating income as a percentage of sales, excluding special items and equity income from SunBelt United States Securities and Exchange Commission Washington, DC 20549 FORM 10-K Í ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2011 ‘ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to .

Patterson President and Chief Executive Officer March 16, 2015 Operating Income Mix Shift*^ % o f O p erating Inco m e SPECIALTY DISTRIBUTION PP&S JV's *Operating Income excludes Corporate charges and special items ^2005–2009 has not been restated for subsequent changes in accounting principles or discontinued operations 100 80 60 40 20 0 '05 '06 '07 '08 '09 '10 '11 '12 '13 '14 PROOF OF PERFORMANCE Our values, strategy, and execution are clearly evident in our financial performance.

OnColor™ PProTint™ Colorants for Clarified PP PP Inhaler Roll Cap

which impacted Color, Additives and Inks (Color) and Specialty Engineered Materials (SEM), and a decline in construction related sales, which primarily impacted Performance Products and Solutions (PPS) in

This unique technology is ideal for highly chromatic multi-layered PE, PP or PET based products including multi-layer blow molded containers and durable, weatherable lawn and garden products.

PP

Produced with ingredients tested to European Pharmacopeia protocols, the range is targeted for use in the production of PP and PE pharma containers for parenteral, ocular, and nasal drugs. 

Watch to learn how Cesa™ Unify™ A4R helps bring incompatible polymers, such as PP and PE, together by forming them into a homogenous polymer mixture that increases mechanical properties based on polymer modification.

PP Inhaler Roll Cap

OnColor™ PProTint™ Colorants for Clarified PP PP Inhaler Roll Cap