DGX
Quest Diagnostics, Inc.
NYSE · Healthcare · Medical - Diagnostics & Research · US
$251.82
−0.43%Price chart
Oct 1Oct 6Oct 9Oct 14Oct 19Oct 22Oct 27Oct 30
Key dataOct 30, 2026
Open$254.48
From 52W high−0.43%
Volume915435.00
Market cap$27.70B
P/E (TTM)24.7x
P/S (TTM)2.3x
Div yield1.34%
Key dataOct 30, 2026
Open
$254.48
From 52W high
−0.43%
Volume
915435.00
Market cap
$27.70B
ValuationView details →
P/E (Fwd)
21.7x
EV/EBITDA
14.6x
P/E (TTM)
24.7x
RSI (14)
68.2
MomentumView details →
1D Return
−0.43%
YTD Return
+45.09%
SummaryUpdated Sep 1, 2026
Quest Diagnostics Incorporated (NYSE:DGX) is one of the largest clinical laboratory testing companies in the United States, founded in 1967 and headquartered in Secaucus, New Jersey. The company went public in 1996 and has grown through both organic expansion and strategic acquisitions to become a dominant player in the diagnostic testing industry. Quest operates a nationwide network of laboratories and patient service centers, providing essential diagnostic information services to healthcare providers, patients, and other stakeholders across the healthcare ecosystem.
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QUEST DIAGNOSTICS INC confirmed that a cyberattack compromised personal and health data stored in its systems, with the number of affected patients unspecified.8d agoQUEST DIAGNOSTICS INC disclosed unauthorized access to its Quanum Lab Services Manager, with certain patient records believed to have been accessed; the scope remains under investigation.9d agoQUEST DIAGNOSTICS INC shares fell in pre-market trading.9d ago