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The series is stated in the current share scale after splits; dividends are not included in the price
| Date | Open | High | Low | Close | Volume, shares |
|---|---|---|---|---|---|
| September 15, 2026 | 238.39 | 248.65 | 237.21 | 247.08 | 1m |
| September 14, 2026 | 237.49 | 239.78 | 234.67 | 237.89 | 974,700 |
| September 11, 2026 | 233.20 | 235.12 | 229.33 | 235.02 | 996,800 |
| September 10, 2026 | 236.32 | 236.48 |
Based on reports through December 31, 2025
Quest Diagnostics is the second national medical laboratory network, living by the same laws of utilisation.
Samples are collected at thousands of draw sites and shipped to large laboratories running automated lines. Fixed costs are high and variable costs low — so each additional test adds almost entirely to profit, while a fall in volume hurts disproportionately.
The company is expanding direct patient access: some tests can be ordered without a doctor's referral and paid for personally, bypassing the insurer. That changes the customary dependence on reimbursement rates, though it remains a small share so far. Risks: government programmes revising fee schedules, competition and technician labour costs. Quest pays a dividend and buys back stock.
Address:500 PLAZA DRIVE, SECAUCUS, NJ, 07094, US
| 131m |
| CELCCelcuity Inc. | 84.54 | +236.70 % | 74m |
| BLLNBillionToOne, Inc. | 110.26 | +641.80 % | 71m |
| GRALGRAIL, Inc. | 78.77 | +487.30 % | 59m |
| RDNTRadNet, Inc. | 77.20 | +187.40 % | 57m |
| 228.57 |
| 231.14 |
| 1m |
| September 09, 2026 | 233.58 | 236.24 | 232.43 | 235.46 | 791,100 |
| September 08, 2026 | 233.61 | 237.56 | 231.52 | 235.50 | 728,900 |
| September 04, 2026 | 235.38 | 238.92 | 235.38 | 237.14 | 798,700 |
| September 03, 2026 | 242.00 | 242.00 | 236.35 | 239.40 | 1m |
| September 02, 2026 | 238.03 | 242.84 | 236.27 | 240.80 | 1m |
| September 01, 2026 | 242.72 | 243.72 | 235.63 | 236.22 | 813,400 |
| August 31, 2026 | 241.99 | 242.64 | 239.40 | 240.30 | 1m |
| August 28, 2026 | 245.17 | 245.28 | 242.27 | 242.76 | 639,900 |
| August 27, 2026 | 242.83 | 247.19 | 242.44 | 244.61 | 839,800 |
| August 26, 2026 | 244.11 | 246.00 | 243.49 | 245.00 | 811,000 |
| August 25, 2026 | 243.93 | 245.78 | 241.79 | 244.51 | 709,200 |
| August 24, 2026 | 243.97 | 246.00 | 242.46 | 243.87 | 837,700 |
| August 21, 2026 | 240.33 | 244.70 | 239.43 | 244.39 | 1m |
| August 20, 2026 | 239.86 | 245.68 | 237.53 | 241.30 | 1m |
| August 19, 2026 | 238.10 | 242.39 | 237.38 | 241.76 | 924,000 |
| August 18, 2026 | 238.01 | 239.38 | 236.07 | 236.25 | 693,600 |