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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
WWA
976
Wealth Watch Advisors
Colorado
$1.33K +$1.24K +7 New
KFI
977
Key Financial Inc
Pennsylvania
$1.27K – – –
SC
978
SouthState Corp
Florida
$1.14K -$710 -4 -40%
RWS
979
Retirement Wealth Solutions
Wisconsin
$1.14K +$1.06K +6 New
HIA
980
HFM Investment Advisors
New Jersey
$1.14K -$177 -1 -14%
PWA
981
Principia Wealth Advisory
Texas
$1.14K -$177 -1 -14%
APW
982
Aventura Private Wealth
Florida
$1.14K – – –
GA
983
Guerra Advisors
Florida
$1.14K +$1.06K +6 New
PMAM
984
Picton Mahoney Asset Management
Ontario, Canada
$1K – – –
KG
985
Kilter Group
New York
$953 – – –
LCM
986
Logan Capital Management
Pennsylvania
$953 – – –
RPA
987
Redwood Park Advisors
California
$763 – – –
EP
988
Essential Partners
California
$762 – – –
IWP
989
IAG Wealth Partners
Wisconsin
$762 – – –
CJ
990
Caitlin John
Michigan
$617 +$532 +3 New
SFCL
991
Strengthening Families & Communities LLC
Massachusetts
$574 – – –
WA
992
WestEnd Advisors
North Carolina
$572 -$177 -1 -25%
ACA
993
American Capital Advisory
Idaho
$572 +$355 +2 +200%
AT
994
Avalon Trust
New Mexico
$572 +$532 +3 New
HFS
995
Hughes Financial Services
Virginia
$553 – – –
PAM
996
Palisade Asset Management
Minnesota
$382 +$355 +2 New
SA
997
Seneschal Advisors
Washington
$382 +$355 +2 New
CWM
998
Copia Wealth Management
Oregon
$381 – – –
CIA
999
Cape Investment Advisory
Georgia
$381 +$355 +2 New
DWM
1000
Dogwood Wealth Management
Kansas
$381 +$355 +2 New
38 39
40
41 42

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.