DGX
Quest Diagnostic (DGX)
NYSE
$262.19+$3.50 (+1.35%)
Price as of Nov 12, 2026 8:56 AM EST
  • $28.6B
    Market Cap
  • 40.78%
    1-Year Change
  • Diagnostics & Research
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
VANGUARD GROUP INC
13.04%
14.4M
+140,450 (+0.98%)
Dec 31, 2025
BLACKROCK FUNDING, INC. /DE
9.17%
10.1M
-13,469 (-0.13%)
Dec 31, 2024
BLACKROCK INC.
9.11%
10.1M
-641,170 (-6.37%)
Jun 30, 2024
BLACKROCK, INC.
8.40%
9.3M
+103,119 (+1.11%)
Jun 30, 2026
ABRDN INC.
7.60%
8.4M
+8.4M (+100.00%)
Dec 31, 2010
VANGUARD CAPITAL MANAGEMENT LLC
6.55%
7.2M
+87,722 (+1.21%)
Jun 30, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
5.55%
6.1M
+49,645 (+0.81%)
Jun 30, 2026

Current Ownership Distribution

  • Institutions2.0B (65.36%)
  • Mutual Funds1.0B (34.56%)
  • Insiders2.3M (0.08%)
  • Other0 (0.00%)

Insider Transactions

  • 0.08% (2.3M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 6
    Number of InsiderSelling (last 12 months)
  • $351.5M
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
Doherty Catherine T.
Executive Vice President
Exempt
Nov 03, 2026
$2.7M
22,105
$121.81
0
Ramachandran Subu
SVP, Regional Businesses
Award
Nov 03, 2026
$0.00
1,386
$0.00
1,386
Doherty Catherine T.
Executive Vice President
Award
Nov 03, 2026
$0.00
4,827
$0.00
71,949
Ramachandran Subu
SVP, Regional Businesses
Award
Nov 03, 2026
$0.00
352
$0.00
2,832
Doherty Catherine T.
Executive Vice President
Exempt
Nov 03, 2026
$2.7M
22,105
$121.81
94,054
Doherty Catherine T.
Executive Vice President
Sell
Nov 03, 2026
$937,135.35
3,818
$245.45
90,236
Doherty Catherine T.
Executive Vice President
Sell
Nov 03, 2026
$1.5M
5,990
$246.26
84,246
Doherty Catherine T.
Executive Vice President
Sell
Nov 03, 2026
$284,278.01
1,151
$246.98
83,095
Doherty Catherine T.
Executive Vice President
Sell
Nov 03, 2026
$585,689.00
2,358
$248.38
80,737
Doherty Catherine T.
Executive Vice President
Sell
Nov 03, 2026
$749,208.11
3,004
$249.40
77,733
Doherty Catherine T.
Executive Vice President
Sell
Nov 03, 2026
$720,654.55
2,877
$250.49
74,856
Doherty Catherine T.
Executive Vice President
Sell
Nov 03, 2026
$730,350.61
2,907
$251.24
71,949
MAIN TIMOTHY L
Small
Oct 21, 2026
$4,246.87
18
$235.94
22,478
CARTER ROBERT B
Small
Oct 21, 2026
$2,359.30
10
$235.93
3,874
KUPPUSAMY KARTHIK
SVP, Clinical Solutions
Small
Oct 21, 2026
$7,786.15
33
$235.94
13,619
Plewman Patrick
SVP for Diagnostic Services
Small
Oct 21, 2026
$9,673.54
41
$235.94
15,334
WENTWORTH TIMOTHY C
Award
Oct 01, 2026
$0.00
135
$0.00
477
Davis J. E.
CEO and President
Sell
Sep 01, 2026
$2.4M
10,000
$242.72
122,423
PREVOZNIK MICHAEL E
SVP & General Counsel
Exempt
Aug 28, 2026
$2.5M
22,677
$112.17
0
PREVOZNIK MICHAEL E
SVP & General Counsel
Exempt
Aug 28, 2026
$2.5M
22,677
$112.17
60,234
PREVOZNIK MICHAEL E
SVP & General Counsel
Sell
Aug 28, 2026
$3.9M
16,010
$242.88
44,224
PREVOZNIK MICHAEL E
SVP & General Counsel
Sell
Aug 28, 2026
$1.5M
6,237
$243.63
37,987
PREVOZNIK MICHAEL E
SVP & General Counsel
Sell
Aug 28, 2026
$105,141.36
430
$244.51
37,557
PREVOZNIK MICHAEL E
SVP & General Counsel
Gift
Aug 28, 2026
$0.00
1,000
$0.00
36,557
DELANEY MARK E
SVP & Chief Commercial Officer
Sell
Jul 28, 2026
$376,288.00
1,600
$235.18
10,335
DELANEY MARK E
SVP & Chief Commercial Officer
Small
Jul 22, 2026
$7,031.44
34
$206.81
11,935
KUPPUSAMY KARTHIK
SVP, Clinical Solutions
Small
Jul 22, 2026
$7,651.86
37
$206.81
13,557
CARTER ROBERT B
Small
Jul 22, 2026
$2,274.84
11
$206.80
3,864
MAIN TIMOTHY L
Small
Jul 22, 2026
$4,343.01
21
$206.81
22,460
Gregg Vicky B
Award
Jul 22, 2026
$14,890.18
72
$206.81
18,386