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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
OC
926
Oakworth Capital
Alabama
$9.53K – – –
SC
927
Solstein Capital
California
$9.34K -$11.7K -66 -57%
FFO
928
Fortitude Family Office
Arizona
$9.34K +$532 +3 +7%
ZBNA
929
Zions Bancorporation, National Association
Utah
$8.96K +$2.13K +12 +34%
SVCP
930
Silicon Valley Capital Partners
California
$8.84K – – –
LWCFA
931
Loring Wolcott & Coolidge Fiduciary Advisors
Massachusetts
$8.79K – – –
BCWM
932
Bartlett & Co Wealth Management
Ohio
$8.77K – – –
DJSG
933
D.J. St. Germain
Massachusetts
$7.81K – – –
ACM
934
Anfield Capital Management
California
$7.62K – – –
WIM
935
Westside Investment Management
California
$7.1K – – –
SA
936
Scarborough Advisors
Maryland
$7.05K – – –
CMA
937
Cedar Mountain Advisors
Oregon
$6.29K – – –
MAM
938
Meeder Asset Management
Ohio
$6.29K +$355 +2 +6%
HAP
939
Harbor Asset Planning
Massachusetts
$6.13K – – –
EWP
940
Elevation Wealth Partners
California
$6.1K +$5.68K +32 New
HBW
941
Hazlett, Burt & Watson
West Virginia
$6K +$5.86K +33 New
HNW
942
High Note Wealth
Minnesota
$5.91K – – –
CIAS
943
CBIZ Investment Advisory Services
Ohio
$5.91K +$5.32K +30 +3,000%
PWA
944
Physician Wealth Advisors
Utah
$5.72K +$3.37K +19 +173%
CTC
945
Cetera Trust Company
Minnesota
$5.72K – – –
TFM
946
TFC Financial Management
Massachusetts
$5.53K -$532 -3 -9%
FFA
947
Frazier Financial Advisors
Ohio
$5.35K – – –
BOJHT
948
Bank of Jackson Hole Trust
Wyoming
$4.96K – – –
WA
949
Westfuller Advisors
New York
$4.96K +$4.61K +26 New
HHMI
950
Howard Hughes Medical Institute
Maryland
$4.57K +$177 +1 +4%
36 37
38
39 40

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.