Avantor Results Presentation Deck

Q3 adjusted P&L USD in millions Reported Revenue Core organic growth Adj. Gross Profit Adj. Gross Profit % Adj. EBITDA Adj. EBITDA % Adj. Earnings Per Share Free Cash Flow Adj. Net Leverage Navantor™ Q3'23 $1,720.2 -7.9% $578.6 33.6% $317.8 18.5% $0.25 $193.0 3.9X² Q3'22 $1,856.5 7.8% $650.7 35.0% $384.0 20.7% $0.34 $219.3 3.6X² - - - - - COMMENTS Inventory destocking and cautious spending impacting end market demand Biomaterials & higher education delivering strong year over year growth Unfavorable mix from continued headwinds in bioproduction and AT/AM Continued volume-related under absorption Reflects lower gross profit and negative fixed cost leverage Persistent inflation partially offset by productivity and SG&A cost controls Flow through of adj. EBITDA performance Interest and tax expense in line with expectations FCF conversion of >110% in Q3 2023; -95% YTD¹ Positive impact from working capital initiatives Paid down >$650M of debt year to date Adj. net leverage impacted by reduction in TTM adjusted EBITDA Note: Organic growth is reported revenue growth excluding the impacts from changes in foreign currency exchange rates. Core organic growth is organic growth net of COVID-19 impact. 1. Conversion: Free Cash Flow / Adj. Net Income. 2. Represents Adj. Net Leverage as of September 30, 2023 and September 30, 2022, respectively. 4

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