Executive Summary
                Quest Diagnostics reported solid year-over-year revenue growth in QQ3 2025, supported by stronger testing volumes and favorable mix, with revenue of $2.816 billion, up 13.18% versus the prior-year period. The quarter delivered an EBITDA of $386 million and operating income of $386 million, underscoring a mid-teens margin profile (operating margin ~13.7%) despite ongoing cost pressures. Net income totaled $245 million with basic EPS of $2.18 (diluted $2.16), reflecting a positive but modest net profit expansion on a year-over-year basis (YoY net income +8.4%), tempered by a QoQ decline of roughly 12.8% in net income and a similar drop in reported earnings per share. The company continues to generate healthy operating cash flow (operating cash flow per share of $5.03) and free cash flow per share of $3.74, supporting a payout ratio of 36.3% and a modest dividend yield (~0.42%). Liquidity remains adequate (current ratio ~1.13; quick ratio ~1.04) with a lean but manageable leverage profile (debt ratio ~0.39; interest coverage ~5.6x).            
        Key Performance Indicators
Revenue
2.82B
                                                    
                                QoQ: 1.99% | YoY:13.18%                            
                                            Gross Profit
949.00M
                                                            33.70% margin
                                                    
                                QoQ: 0.53% | YoY:17.02%                            
                                            Operating Income
386.00M
                                                    
                                QoQ: -9.18% | YoY:16.97%                            
                                            Net Income
245.00M
                                                    
                                QoQ: -12.81% | YoY:8.41%                            
                                            EPS
2.18
                                                    
                                QoQ: -13.15% | YoY:8.46%                            
                                            Revenue Trend
Margin Analysis
Key Insights
- Revenue: $2.816B, YoY +13.18%, QoQ +1.99%
 - Gross Profit: $0.949B, Margin 33.70%, YoY +17.02%, QoQ +0.53%
 - Operating Income: $0.386B, Margin 13.70%, YoY +16.97%, QoQ -9.18%
 - Net Income: $0.245B, Margin 8.70%, YoY +8.41%, QoQ -12.81%
 - EPS (GAAP): $2.18; Diluted: $2.16; YoY +8.46%, QoQ -13.15%