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Quest Diagnostics
DGX

1,005 hedge funds and large institutions have $20B invested in Quest Diagnostics in 2025 Q3 according to their latest regulatory filings, with 114 funds opening new positions, 358 increasing their positions, 343 reducing their positions, and 82 closing their positions.

New
Increased
Maintained
Reduced
Closed

39% more first-time investments, than exits

New positions opened: 114 | Existing positions closed: 82

2% more funds holding

Funds holding: 990 → 1,005 (+15)

4% more repeat investments, than reductions

Existing positions increased: 358 | Existing positions reduced: 343

4% more capital invested

Capital invested by funds: $19.3B → $20B (+$680M)

2.39% less ownership

Funds ownership: 96.25% → 93.86% (-2.4%)

12% less call options, than puts

Call options by funds: $98.2M | Put options by funds: $112M

25% less funds holding in top 10

Funds holding in top 10: 4 → 3 (-1)

Holders
1,005
Holders Change
+15
Holders Change %
+1.52%
% of All Funds
13.19%
Holding in Top 10
3
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-25%
% of All Funds
0.04%
New
114
Increased
358
Reduced
343
Closed
82
Calls
$98.2M
Puts
$112M
Net Calls
-$13.7M
Net Calls Change
+$30.8M

Top Buyers

Rank Fund Capital Flow
1
Boston Partners
Boston Partners
Massachusetts
+$177M
2
EIG
EdgePoint Investment Group
Ontario, Canada
+$151M
3
Pacer Advisors
Pacer Advisors
Pennsylvania
+$77M
4
Goldman Sachs
Goldman Sachs
New York
+$74.2M
5
Marshall Wace
Marshall Wace
United Kingdom
+$62.5M

Top Sellers

Rank Fund Capital Flow
1
AllianceBernstein
AllianceBernstein
Tennessee
-$108M
2
Victory Capital Management
Victory Capital Management
Texas
-$82.6M
3
Royal Bank of Canada
Royal Bank of Canada
Ontario, Canada
-$73.8M
4
UBS AM
UBS AM
Illinois
-$55.9M
5
UBS Group
UBS Group
Switzerland
-$55.8M
Name Holding Trade Value Shares
Change 		Change in
Stake
HDIM
951
Hanson & Doremus Investment Management
Vermont
$4K +$3.37K +19 New
MAFA
952
MJT & Associates Financial Advisory
Minnesota
$3.81K – – –
HWA
953
Heartwood Wealth Advisors
Virginia
$3.62K +$3.37K +19 New
DPW
954
DiNuzzo Private Wealth
Pennsylvania
$3.45K -$177 -1 -5%
WPA
955
Wealth Preservation Advisors
Tennessee
$3.24K +$177 +1 +6%
BFS
956
Bare Financial Services
Pennsylvania
$3.24K +$3.02K +17 New
ATC
957
Adirondack Trust Company
New York
$3.05K – – –
JFA
958
JNBA Financial Advisors
Minnesota
$2.86K – – –
DF
959
DecisionPoint Financial
Arizona
$2.73K – – –
VWA
960
Valued Wealth Advisors
Utah
$2.67K – – –
BWAM
961
Boyd Watterson Asset Management
Ohio
$2.48K – – –
BWL
962
Bogart Wealth LLC
Virginia
$2.37K +$532 +3 +33%
AWM
963
Activest Wealth Management
Florida
$2.29K +$355 +2 +20%
MAM
964
Marquette Asset Management
Minnesota
$2.29K +$2.13K +12 New
AP
965
Aspect Partners
Virginia
$2.1K – – –
TIM
966
Tortoise Investment Management
New York
$2.1K +$710 +4 +57%
CCM
967
Cloud Capital Management
Washington
$2K +$2.66K +15 New
TPBG
968
Turning Point Benefit Group
Maryland
$1.82K +$1.77K +10 New
RWM
969
Rialto Wealth Management
New York
$1.72K +$355 +2 +29%
JGIA
970
Jackson Grant Investment Advisers
Connecticut
$1.72K – – –
BHWM
971
Bay Harbor Wealth Management
Maryland
$1.72K +$355 +2 +29%
FC
972
Financial Consulate
Maryland
$1.52K +$1.42K +8 New
Q1WB
973
Quest 10 Wealth Builders
Virginia
$1.52K +$1.42K +8 New
CWP
974
Clark Wealth Partners
Illinois
$1.39K +$355 +2 +33%
NRG
975
Nemes Rush Group
Michigan
$1.33K – – –
37 38
39
40 41

DGX Hedge Fund Activity: Q3 2025 in Review

1,005 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in Quest Diagnostics (DGX) for Q3 2025, worth a combined $20B — up 3.5% from $19.3B a quarter earlier.

Buyers outnumbered sellers: 114 funds opened new DGX positions and 82 closed out — a net gain of 32 holders — while 358 added to existing stakes and 343 trimmed.

The largest buyer was Boston Partners, adding an estimated $177M. The largest seller was AllianceBernstein, cutting an estimated $108M.

  • 1,005 institutional investors held Quest Diagnostics (DGX) as of Q3 2025, up from 990 in Q2 2025.
  • Funds reported $20B of Quest Diagnostics stock for Q3 2025, up 3.5% quarter-over-quarter.
  • 114 funds opened new Quest Diagnostics positions in Q3 2025 and 82 closed out, a net change of +32 holders.
  • The largest Quest Diagnostics buyer in Q3 2025 was Boston Partners, an estimated $177M added.
  • The largest Quest Diagnostics seller in Q3 2025 was AllianceBernstein, an estimated $108M sold.

Based on aggregated 13F filings for Q3 2025.