Quest Diagnostics Incorporated DGX
Open calendar →Quest Diagnostics Incorporated Common Stock · Company · NYSE
USD closing-price chart (daily close from yfinance · Last year)
USD 178.24 → 209.83 · 17.7%
Numbered dotted lines mark the filtered filings under Announcement Events below.
Price & SEC Filing History 22 Jul 2025 — 23 Jul 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.
Date
Open
High
Low
Close
Volume
No data yet
18 · 8-K
Pre-market · 02:46 ET
8-K ↗
207.1300
212.3000
205.4125
209.8300
1,833,371
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
17 · 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
16 · 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
15 · 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
14 · 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
13 · 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
12 · 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
11 · 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
10 · DEFA14A
After-hours · 16:33 ET
DEFA14A ↗
9 · 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
8 · 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
7 · 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
6 · 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
5 · 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
184.8800
186.4600
180.8400
181.1700
1,583,200
195.0800
197.5500
179.8600
184.6400
2,889,900
4 · 8-K
Pre-market · 06:50 ET
8-K ↗
3 · 10-Q
Pre-market · 06:31 ET
10-Q ↗
190.6900
191.8700
189.5000
190.4100
1,491,100
Weekend
Weekend
187.6100
190.0800
187.0500
189.5100
983,900
187.5000
188.7100
186.2800
186.8200
1,056,600
185.5600
188.1100
185.1900
187.3500
1,071,900
182.8200
185.7000
182.7700
185.3900
718,500
182.7100
184.2400
181.8200
182.7800
809,300
Weekend
Weekend
182.3000
184.3300
181.4200
184.0700
737,000
181.0500
182.7900
180.9800
181.4400
538,700
181.5200
181.6200
178.5400
180.8900
745,300
179.7700
184.4800
178.7600
181.8900
1,110,600
178.0000
179.6300
177.3900
178.4300
844,000
Weekend
Weekend
179.9400
180.6800
178.2500
179.3300
1,395,200
180.8300
182.0000
177.7900
180.9600
1,029,700
190.6800
190.9800
181.8100
182.0700
1,781,900
188.8800
191.4900
188.8800
190.5800
780,500
188.9900
189.4800
187.7600
188.8400
528,000
Weekend
Weekend
186.2900
189.2300
185.1700
188.9900
550,500
186.7100
187.2600
183.6200
185.3900
657,800
186.4900
187.9200
185.9800
186.8200
748,100
184.7200
187.9600
184.7200
186.9700
775,000
183.3200
185.5100
182.9000
184.6900
976,000
Weekend
Weekend
183.6900
185.0000
183.2600
183.6000
1,435,600
180.8400
184.1300
180.7100
183.3300
667,800
181.1500
183.4600
180.5200
182.2500
662,900
180.4800
181.5900
179.6600
180.1600
549,500
182.3700
183.2700
180.5800
180.6200
642,200
Weekend
Weekend
183.2400
185.0500
182.5100
182.9100
454,100
180.2800
184.1400
180.0000
183.4600
598,500
181.9200
182.1100
179.7700
180.1400
652,100
182.1700
183.3800
181.1700
182.6800
435,500
183.5000
183.5000
180.9100
182.5300
438,500
Weekend
Weekend
180.2000
183.7800
180.2000
183.4900
556,200
180.5400
180.8400
179.3800
180.1100
585,700
178.3400
179.6200
177.0400
179.5100
689,500
180.9000
182.0100
178.3100
178.7000
1,109,200
No trading
Weekend
Weekend
179.5600
182.3500
179.0600
181.6400
731,500
179.5100
179.7100
178.1300
179.2000
560,000
180.5400
180.8900
179.4500
179.7600
597,100
178.7700
180.3700
178.3900
180.3600
1,044,400
177.2200
179.1900
176.9700
178.6600
753,400
Weekend
Weekend
185.0000
185.6200
179.9300
180.2300
947,800
183.5100
185.2600
182.8400
183.7200
1,074,600
183.3400
184.9700
182.4400
184.4000
957,800
179.0800
183.3700
179.0500
182.8300
784,700
180.2300
180.4400
178.8400
178.9500
808,500
Weekend
Weekend
178.9400
180.3700
177.2700
179.7700
810,200
178.8400
178.8400
177.2900
178.4400
679,500
178.8700
179.4700
177.5900
179.0400
928,500
177.3600
178.8700
175.5600
178.6800
763,200
177.0900
178.5500
177.0400
178.3600
653,200
Weekend
Weekend
174.6500
177.2500
174.5800
176.9600
616,300
173.5900
174.4700
172.7000
174.2700
898,400
172.8600
175.4800
171.7900
173.0000
994,300
172.6000
174.5800
171.9100
173.2700
744,200
170.5300
172.7300
170.5300
172.4400
788,400
Weekend
Weekend
168.2400
171.9100
167.9600
170.8500
1,421,100
166.7600
170.1400
166.7600
167.4100
941,400
167.4000
169.7500
166.7500
168.7300
1,094,000
168.7200
169.6200
167.0300
167.9300
810,700
167.5900
168.7600
165.7800
167.8500
1,086,600
Weekend
Weekend
172.6000
173.0400
167.1600
168.5500
1,877,500
172.5300
175.7600
170.4700
171.9000
2,114,200
2 · 10-Q
After-hours · 16:25 ET
10-Q ↗
179.6300
180.8900
168.3200
170.4800
3,086,500
170.6300
178.8600
170.0300
178.2400
2,697,900
1 · 8-K
Pre-market · 06:48 ET
8-K ↗
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.