DGX
Quest Diagnostic (DGX)
NYSE
$246.43-$0.02 (-0.008%)
Price as of Sep 18, 2026 7:33 PM EDT
  • $27.3B
    Market Cap
  • 36.59%
    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

  • Institutions1.9B (65.33%)
  • Mutual Funds1.0B (34.59%)
  • 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)
  • 7
    Number of InsiderSelling (last 12 months)
  • $245.6M
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
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
Lassiter Wright III
Small
Jul 22, 2026
$1,240.88
6
$206.81
10,323
SAMAD SAMER ABDUL
Executive Vice President & CFO
Award
Jul 22, 2026
$21,094.31
102
$206.81
33,478
Plewman Patrick
SVP for Diagnostic Services
Small
Jul 22, 2026
$9,513.12
46
$206.81
15,293
Gregg Vicky B
Award
Jul 22, 2026
$14,890.18
72
$206.81
18,386
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
WENTWORTH TIMOTHY C
Award
Apr 01, 2026
$0.00
198
$0.00
198
WENTWORTH TIMOTHY C
Award
Mar 09, 2026
$0.00
215
$0.00
215
PREVOZNIK MICHAEL E
SVP & General Counsel
Sell
Mar 05, 2026
$799,682.38
3,878
$206.21
37,557
Doherty Catherine T.
EVP, Regional Businesses
Sell
Mar 05, 2026
$1.1M
5,558
$206.21
67,122
SAMAD SAMER ABDUL
Executive Vice President & CFO
Award
Mar 04, 2026
$2.9M
13,947
$204.86
40,988
Davis J. E.
CEO and President
Award
Mar 04, 2026
$10.6M
51,652
$204.86
168,837
PREVOZNIK MICHAEL E
SVP & General Counsel
Award
Mar 04, 2026
$1.5M
7,232
$204.86
44,789
KUPPUSAMY KARTHIK
SVP, Clinical Solutions
Award
Mar 04, 2026
$1.3M
6,200
$204.86
16,069
SAMAD SAMER ABDUL
Executive Vice President & CFO
In Kind
Mar 04, 2026
$1.6M
7,720
$204.86
33,268
DEPPE MICHAEL J
SVP, Corp. Controller & CAO
Award
Mar 04, 2026
$301,758.78
1,473
$204.86
35,946
PREVOZNIK MICHAEL E
SVP & General Counsel
In Kind
Mar 04, 2026
$687,100.44
3,354
$204.86
41,435
Doherty Catherine T.
EVP, Regional Businesses
Award
Mar 04, 2026
$2.3M
11,364
$204.86
78,486
Davis J. E.
CEO and President
In Kind
Mar 04, 2026
$5.4M
26,414
$204.86
142,423
KUPPUSAMY KARTHIK
SVP, Clinical Solutions
Sell
Mar 04, 2026
$538,372.08
2,628
$204.86
13,441