Quest Diagnostics Incorporated DGX

Open calendar →

Quest Diagnostics Incorporated Common Stock · Company · NYSE · Healthcare / Diagnostics & Research

Paper trade (simulated — no real money)

Fill: USD 241.8900 · FX 1 USD = 1.277900 SGD · about SGD 309.1112 per unit

Sign in to place simulated trades. USD fills are converted into the SGD portfolio at the displayed rate.

Announcement types: (default: consequential filings)
Results & current reports
Capital markets
Ownership & governance

USD closing-price chart (daily close from yfinance · Last year)

USD 183.23 → 241.89 · 32.0%
247.450210.470173.490 1 2 3 4 5,6 7 8 9 10 11 12 13 14,15 16 17,18 Oct 25Jan 26Apr 26Jul 26Oct 26

Numbered dotted lines mark the filtered filings under Announcement Events below.

Price & SEC Filing History 23 Oct 2025 — 24 Oct 2026 (Last year)

Daily NYSE prices are sourced from yfinance. Yellow highlighting marks an intraday rise or a gap up between adjacent trading sessions. SEC acceptance times are converted to US Eastern time: pre-market filings appear below that day’s OHLCV row; filings accepted after the 09:30 ET open appear above it. The SEC does not publish an exact first-public-availability timestamp, so acceptance time is the best available proxy.

Weekend
239.6300 244.3000 240.5400 241.8900 933,364
18 · 8-K After market open · 10:49 ET 8-K ↗ 17 · 8-K After market open · 10:53 ET CURRENT REPORT ↗
226.5000 246.0000 226.2200 243.2800 1,686,000
235.3400 240.5600 223.5000 238.9300 1,205,100
236.0000 237.2900 234.0600 237.1200 1,103,700
234.4000 235.9900 233.8200 234.9100 864,600
Weekend
Weekend
239.6700 240.7500 233.5600 235.0000 799,600
235.8500 239.1700 235.5700 239.1500 1,002,700
231.3200 234.9700 231.3200 233.4300 1,201,400
233.1300 234.3300 230.2300 230.4600 1,010,100
228.6600 234.6400 228.6600 232.6300 865,200
Weekend
Weekend
227.8600 232.1800 227.8600 230.9700 775,400
228.1600 231.0800 226.3600 230.8100 941,900
228.5100 229.8000 226.8100 227.0600 927,400
16 · 8-K After-hours · 20:30 ET CURRENT REPORT ↗
229.9200 232.0900 225.7800 228.3900 1,783,900
232.9300 233.6500 229.9600 232.2200 1,014,100
Weekend
Weekend
230.5800 233.4800 228.8300 233.3300 1,100,800
232.7400 233.3300 230.4700 231.0900 992,200
233.3300 236.9700 230.8400 233.0700 1,093,400
235.4600 237.6200 230.9800 231.9700 1,536,900
234.2700 238.1000 233.8100 237.6200 1,030,800
Weekend
Weekend
236.3700 238.2500 235.4800 236.3200 741,700
234.0800 237.2900 233.5500 236.5900 926,900
235.1200 238.6200 231.9200 233.0000 1,129,600
228.5900 237.2900 227.2400 234.7600 2,719,200
247.1300 248.8400 243.9300 244.8800 907,600
Weekend
Weekend
246.5200 247.6300 244.8900 246.4500 1,924,800
248.2800 248.7000 246.2600 247.4500 989,500
245.4700 248.5700 244.8500 247.0800 948,700
238.3900 248.6500 237.2100 247.0800 1,373,500
237.4900 239.7800 234.6700 237.8900 974,700
Weekend
Weekend
233.2000 235.1200 229.3300 235.0200 996,800
236.3200 236.4800 228.5700 231.1400 1,090,500
233.5800 236.2400 232.4300 235.4600 791,100
233.6100 237.5600 231.5200 235.5000 728,900
No trading
Weekend
Weekend
235.3800 238.9200 235.3800 237.1400 798,700
242.0000 242.0000 236.3500 239.4000 1,043,300
238.0300 242.8400 236.2700 240.8000 1,144,100
242.7200 243.7200 235.6300 236.2200 813,400
241.9900 242.6400 239.4000 240.3000 1,358,100
Weekend
Weekend
245.1700 245.2800 242.2700 242.7600 639,900
242.8300 247.1900 242.4400 244.6100 839,800
244.1100 246.0000 243.4900 245.0000 811,000
243.9300 245.7800 241.7900 244.5100 709,200
243.9700 246.0000 242.4600 243.8700 837,700
Weekend
Weekend
240.3300 244.7000 239.4300 244.3900 1,263,100
239.8600 245.6800 237.5300 241.3000 1,139,400
238.1000 242.3900 237.3800 241.7600 924,000
238.0100 239.3800 236.0700 236.2500 693,600
233.9400 237.1700 233.0000 235.5200 614,200
Weekend
Weekend
235.8200 237.7000 233.6900 234.4000 541,800
239.1000 240.0000 235.6500 236.0400 549,000
234.4600 238.5100 232.2800 237.7700 686,800
236.3500 239.9200 235.5100 237.5000 847,000
236.5300 239.3300 235.8500 237.6300 856,100
Weekend
Weekend
236.3400 239.3800 236.3400 238.3500 574,500
237.6600 238.8800 235.3200 238.5000 642,200
234.2200 236.6700 232.5600 235.8400 674,200
231.9500 234.5500 229.7600 233.7200 903,600
232.8400 233.4400 230.5400 231.9500 839,200
Weekend
Weekend
234.0000 235.2900 232.0100 233.0100 872,500
230.9100 235.6100 229.0100 234.3000 947,700
235.1100 237.8400 233.0000 235.2200 964,500
235.1800 240.1300 233.9800 235.9400 1,611,900
225.9500 231.9500 224.9700 231.8400 1,143,200
Weekend
Weekend
228.0000 233.2100 223.4200 227.8600 1,542,100
15 · 10-Q After market open · 12:16 ET 10-Q ↗
228.0900 237.7800 220.0000 227.9000 3,758,400
14 · 8-K Pre-market · 02:46 ET 8-K ↗
207.1300 212.3000 205.4100 209.8300 1,834,000
206.1600 208.0100 204.1000 206.8400 691,900
208.6100 211.0000 205.6100 207.6600 822,900
Weekend
Weekend
210.9500 214.4000 209.4100 210.6800 955,500
201.0000 209.5600 201.0000 209.4100 991,700
204.6800 206.4100 201.1200 201.7700 1,193,200
202.8000 208.5200 201.1300 206.0000 865,900
207.4800 210.7600 207.0100 207.3500 568,900
Weekend
Weekend
208.2500 209.8600 207.0300 207.4400 614,800
210.2000 210.2000 206.3400 208.0500 621,100
210.7400 210.7400 207.2300 208.2100 773,700
216.8900 219.2000 212.1200 212.3800 981,100
215.6400 216.5200 212.5700 213.4500 745,900
Weekend
Weekend
No trading
217.0700 217.4100 214.9400 215.7200 869,700
213.6700 216.8700 211.4000 216.0200 1,004,100
212.8900 214.2100 210.6700 211.9500 847,800
207.9700 212.7600 206.9800 212.6400 786,300
Weekend
Weekend
207.9700 209.8900 206.5500 209.8800 1,349,700
203.1400 207.8500 203.1400 206.2400 632,400
198.4100 205.7600 198.4100 203.1100 1,135,600
195.7800 197.7900 194.1500 197.1800 988,000
194.1300 195.1600 192.9000 193.5800 904,800
Weekend
Weekend
No trading
196.6900 197.4400 192.8300 195.0000 1,292,200
200.0000 201.0400 196.5000 197.7600 754,200
203.0300 204.7000 199.6600 201.0400 1,020,300
202.2500 203.2000 200.3700 202.1800 1,009,300
Weekend
Weekend
205.5300 205.9600 202.3800 203.0600 898,800
204.0700 207.5000 202.5400 203.8300 1,079,900
203.3500 207.3000 202.9700 203.7800 786,600
197.9000 204.8400 196.9900 204.5300 747,100
202.0800 202.0800 196.7000 197.2100 821,700
Weekend
Weekend
197.4100 201.5400 197.3100 200.2900 816,200
194.9900 201.9900 194.9900 196.1200 735,900
193.0000 195.2100 192.3800 193.6700 648,100
192.9300 193.3100 191.0200 193.1600 678,300
194.1400 196.4800 191.8500 192.2000 609,500
Weekend
Weekend
196.5900 197.3800 194.3000 194.9000 1,264,300
194.0300 196.8000 193.9100 196.2000 653,700
194.2600 196.3200 192.5700 193.9900 597,200
194.2600 194.6900 192.3500 192.8800 869,400
No trading
Weekend
Weekend
193.9900 196.9200 193.9600 195.2100 871,300
13 · 8-K After-hours · 16:48 ET 8-K ↗
192.7300 193.8300 188.8800 193.8200 474,000
191.8700 194.8500 190.4000 193.7500 948,700
189.2400 191.1800 187.0600 190.3900 794,600
187.6400 191.1600 187.2500 189.8400 926,100
Weekend
Weekend
189.1600 189.8800 186.4300 186.6100 1,081,500
190.9200 192.8000 187.1400 187.9400 768,100
188.8100 191.1100 187.5100 190.8500 693,100
191.2100 192.3000 189.4700 190.1800 754,900
187.3600 190.4500 187.1300 189.8100 620,700
Weekend
Weekend
12 · 8-K After-hours · 16:15 ET FORM 8-K ↗
191.7100 192.2000 186.2300 187.3900 762,500
188.1900 190.9900 187.9000 190.8400 739,900
190.8900 192.6200 188.4900 189.1300 898,600
191.3900 191.7000 189.1800 190.8400 613,800
190.6100 193.5000 190.4100 191.5000 567,500
Weekend
Weekend
11 · 8-K After-hours · 16:15 ET FORM 8-K ↗
194.5000 196.3400 192.2100 192.6700 692,000
190.2400 195.8700 189.9200 194.2000 1,110,000
193.8500 194.4900 187.5000 189.3200 1,399,900
10 · 424B2 After-hours · 17:22 ET 424B2 ↗
198.5900 198.7800 194.2700 195.0500 909,100
195.9100 198.0000 195.6100 196.6300 702,900
9 · 424B2 Pre-market · 08:47 ET 424B2 ↗
Weekend
Weekend
199.9900 200.0700 194.4600 196.2700 1,038,900
205.2800 205.6600 196.9600 199.5300 1,263,400
8 · 10-Q After-hours · 16:12 ET 10-Q ↗
205.3700 207.0000 198.7100 204.0000 1,609,400
203.2500 209.7900 202.1300 205.0400 2,426,100
7 · 8-K Pre-market · 06:48 ET 8-K ↗
194.2200 196.7700 191.6300 196.3100 1,964,300
Weekend
Weekend
190.2300 196.4500 190.2300 195.0200 1,000,100
191.2200 194.2700 191.1500 191.4600 987,200
193.1700 194.2800 191.0400 191.4200 877,700
192.2700 194.2600 191.1600 194.1600 885,500
191.0300 193.1300 189.7200 192.9100 899,000
Weekend
Weekend
197.6600 197.6600 190.1200 191.5100 1,044,200
197.9300 199.4100 196.5500 197.8200 718,400
196.1800 198.8900 194.0200 198.8100 799,300
199.4900 201.0000 195.7000 196.8100 908,800
6 · DEFA14A After-hours · 16:33 ET DEFA14A ↗ 5 · DEF 14A After-hours · 16:32 ET DEF 14A ↗
196.8700 199.2200 196.5700 198.9600 477,800
Weekend
Weekend
No trading
196.6600 199.1400 196.0600 198.0200 520,000
195.5100 198.8600 194.0900 197.6900 587,300
194.8600 198.9500 192.7300 195.9800 1,268,700
196.6700 197.5600 194.7200 197.1600 865,500
Weekend
Weekend
197.9300 198.6300 194.5700 195.5100 976,300
196.2400 198.8800 195.0000 198.1500 706,200
196.7700 197.7200 194.2800 196.4600 679,600
194.5800 197.0300 193.8100 196.0800 759,200
197.3300 202.9100 195.2300 195.6000 881,100
Weekend
Weekend
194.0700 196.8300 192.7900 195.2600 2,030,100
195.0100 197.2100 193.9100 194.1600 806,600
197.0700 201.4900 194.8800 195.2300 694,200
200.7000 200.7000 197.1800 198.6100 795,400
200.9800 201.8800 198.8600 198.9400 777,200
Weekend
Weekend
202.8400 205.0000 199.0900 199.7000 663,100
4 · 8-K After-hours · 16:30 ET CURRENT REPORT ↗
200.3400 203.0000 199.9700 200.8800 772,800
199.9900 201.7100 198.3700 200.5600 646,700
203.1500 204.3900 198.8700 200.9000 675,900
198.2500 202.4800 195.3900 201.5800 819,600
Weekend
Weekend
203.7600 203.7800 199.0100 199.2100 1,055,700
206.2100 206.2100 203.4700 203.9800 604,100
208.1400 209.7600 207.1100 208.4500 508,300
207.7300 209.8300 203.8900 208.3600 779,500
212.5200 213.2600 209.4300 210.2500 922,400
Weekend
Weekend
211.0900 213.5000 208.9700 211.9100 1,058,700
3 · 10-K After-hours · 16:38 ET 10-K ↗
208.6700 211.5600 208.0900 211.1000 783,700
209.5200 210.6900 206.1300 207.8000 798,300
207.8100 209.9000 206.3600 209.5400 882,100
201.9900 207.7200 201.9900 207.4300 783,100
Weekend
Weekend
204.3600 204.4200 200.9400 202.4100 642,000
204.8300 205.0900 202.0000 202.4400 815,300
205.2700 206.7500 203.1700 204.3900 871,700
207.9900 208.9300 202.8300 205.4900 971,200
No trading
Weekend
Weekend
207.4800 209.3900 204.5800 206.8700 1,354,600
211.8000 213.2000 206.8100 206.8600 1,671,500
207.0400 210.3800 201.9900 209.3200 1,431,200
194.7200 207.0500 191.9000 205.3500 2,307,900
2 · 8-K Pre-market · 06:53 ET 8-K ↗
190.0000 191.7800 187.5800 191.2500 1,925,500
Weekend
Weekend
193.2000 193.6000 189.9400 190.7100 1,099,500
190.0000 193.4600 188.6500 192.3000 1,635,500
185.3400 189.8000 185.1300 189.2300 1,337,500
184.7800 189.1300 184.6900 185.1700 807,900
186.0100 186.9300 182.3600 185.0000 1,003,800
Weekend
Weekend
183.8200 187.1900 183.8200 187.0300 1,164,100
182.1700 183.9700 181.6800 182.3500 635,700
183.0200 183.5800 181.6300 182.7400 838,900
181.5100 184.3900 181.4800 184.2400 667,900
182.1400 183.7900 181.3700 182.5300 681,900
Weekend
Weekend
181.9400 182.4400 179.7300 181.0200 848,900
185.1100 185.4700 182.0100 182.1600 1,754,200
189.0200 189.7500 184.4300 184.6500 1,140,300
187.6900 191.0700 186.8300 188.9500 1,482,000
No trading
Weekend
Weekend
189.4000 190.9600 188.7500 189.4900 1,132,500
187.1500 190.9900 186.4300 190.2600 1,245,600
180.5000 187.1000 179.8300 186.7700 1,498,900
176.8600 180.4200 175.4700 179.9600 1,069,600
1 · 8-K After-hours · 16:37 ET CURRENT REPORT ↗
175.8100 176.0600 173.5100 175.9400 695,200
Weekend
Weekend
177.5200 178.3000 174.4300 174.4400 942,400
178.1900 180.6600 176.7000 177.7400 870,100
181.1500 181.2300 177.7000 178.1400 767,300
173.3800 181.2200 173.3800 180.4600 1,165,400
173.4600 174.4900 171.1800 173.4900 748,800
Weekend
Weekend
173.3100 173.8100 172.0300 173.7900 683,200
No trading
175.4900 175.7300 173.3900 173.5300 645,300
175.3000 176.3700 175.0300 175.4900 732,800
175.7200 176.3500 174.6300 175.5200 632,000
Weekend
Weekend
176.4700 176.7300 175.6500 175.9400 402,700
No trading
175.7400 176.2600 175.1300 175.9200 296,500
176.5500 176.5500 174.4800 175.0800 652,500
176.0000 177.2400 175.6300 176.3400 704,300
Weekend
Weekend
175.8000 176.8300 174.5900 176.0600 1,580,900
179.1900 179.8000 176.0300 176.1500 973,800
178.3300 179.2300 177.0200 179.1000 1,652,300
184.8400 184.8400 178.5200 178.6600 1,338,900
183.2500 184.8100 182.9600 184.1100 951,900
Weekend
Weekend
182.1600 183.0100 181.2300 182.5600 1,139,000
179.6400 182.0600 179.5100 181.5700 685,600
180.0000 180.9900 178.9500 179.5100 1,071,100
181.7100 182.7700 178.6100 179.6200 846,500
182.2900 183.5000 181.2300 181.8200 980,700
Weekend
Weekend
183.2000 184.1900 182.0800 182.5100 738,200
182.3100 185.1200 182.2500 184.1800 1,044,900
183.2700 184.1600 182.2100 182.6100 1,057,300
183.8000 184.8900 182.2100 182.5500 1,177,500
188.5000 189.3900 183.6600 183.7700 1,175,700
Weekend
Weekend
190.1200 190.2600 188.9400 189.1800 379,700
No trading
191.4400 192.2600 189.2200 189.6900 869,600
191.7600 193.3500 190.7300 192.3500 1,207,300
192.7500 192.7500 189.7400 190.5800 2,285,300
Weekend
Weekend
188.1100 193.7600 187.8000 191.2500 1,769,800
187.1400 188.7700 186.2500 187.6100 1,104,400
185.3400 187.6800 184.1800 185.9600 874,600
187.3500 188.1600 184.3500 185.3200 1,368,400
187.0100 189.2600 185.0900 186.1900 1,086,500
Weekend
Weekend
186.8900 188.8900 186.1200 186.9500 923,900
185.6000 190.4700 184.5000 187.5800 1,412,000
188.3600 189.0700 186.8100 186.8500 1,076,600
184.9800 191.3100 184.8400 188.8500 1,293,700
178.2000 184.5900 175.7700 184.3100 1,592,600
Weekend
Weekend
177.1400 180.5900 176.0900 179.5000 1,020,700
177.9900 178.9800 175.6700 176.5100 830,200
177.8100 179.3900 176.8500 178.2600 784,900
179.3500 180.0400 176.2700 178.0300 1,059,500
175.7800 179.1500 174.3600 178.8400 1,106,900
Weekend
Weekend
174.3300 176.8100 174.3300 175.9500 966,200
175.2400 178.8800 174.9100 175.7500 1,427,000
178.3000 178.7600 174.7000 174.7800 1,014,800
179.8000 180.6300 177.1700 178.2800 1,434,000
181.3700 182.1600 179.7400 180.2600 900,900
Weekend
Weekend
183.9900 184.7300 181.9400 182.1800 867,100
181.9600 183.3800 179.5300 183.2300 1,230,900

Announcement Events

Each title opens the filing on the SEC website. Registered users can summarise the filing and up to seven relevant exhibits linked within the same SEC submission.

18 8-K 8-K (opens SEC filing in a new tab) After market open · 10:49 ET Summarise
17 8-K CURRENT REPORT (opens SEC filing in a new tab) After market open · 10:53 ET Summarise
16 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 20:30 ET Summarise
15 10-Q 10-Q (opens SEC filing in a new tab) After market open · 12:16 ET Summarise
14 8-K 8-K (opens SEC filing in a new tab) Pre-market · 02:46 ET Summarise
13 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:48 ET Summarise
12 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:15 ET Summarise
11 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:15 ET Summarise
10 424B2 424B2 (opens SEC filing in a new tab) After-hours · 17:22 ET Summarise
9 424B2 424B2 (opens SEC filing in a new tab) Pre-market · 08:47 ET Summarise
8 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:12 ET Summarise
7 8-K 8-K (opens SEC filing in a new tab) Pre-market · 06:48 ET Summarise
6 DEFA14A DEFA14A (opens SEC filing in a new tab) After-hours · 16:33 ET Summarise
5 DEF 14A DEF 14A (opens SEC filing in a new tab) After-hours · 16:32 ET Summarise
4 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 16:30 ET Summarise
3 10-K 10-K (opens SEC filing in a new tab) After-hours · 16:38 ET Summarise
2 8-K 8-K (opens SEC filing in a new tab) Pre-market · 06:53 ET Summarise
1 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 16:37 ET Summarise