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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
PWM
726
Perigon Wealth Management
California
$243K +$9.76K +55 +5%
PFM
727
Patton Fund Management
Texas
$241K – – –
BAAM
728
Baker Avenue Asset Management
California
$241K +$224K +1,265 New
GSEP
729
Golden State Equity Partners
California
$240K -$13K -73 -5%
CAL
730
Capital Advisors Ltd
Ohio
$240K -$7.81K -44 -3%
RCM
731
Radnor Capital Management
Pennsylvania
$240K – – –
HCM
732
Howard Capital Management
Georgia
$240K +$223K +1,257 New
CCA
733
Checchi Capital Advisers
California
$239K -$40.6K -229 -15%
SW
734
SteelPeak Wealth
California
$239K -$2.43M -13,705 -92%
OAM
735
Oppenheimer Asset Management
New York
$238K +$3.37K +19 +2%
MA
736
Mutual Advisors
Nebraska
$238K -$8.16K -46 -3%
CFG
737
Citizens Financial Group
Rhode Island
$237K +$17K +96 +8%
BFO
738
Biltmore Family Office
North Carolina
$236K – – –
BMCM
739
Bryn Mawr Capital Management
Pennsylvania
$236K -$131K -738 -37%
ONST
740
Old North State Trust
North Carolina
$233K +$217K +1,224 New
LNB
741
Ledyard National Bank
$233K -$29.1K -164 -12%
VCM
742
Versant Capital Management
Arizona
$233K +$174K +978 +402%
IC
743
Inscription Capital
Texas
$232K -$428K -2,412 -66%
CAMG
744
CWA Asset Management Group
Florida
$232K +$216K +1,217 New
IWM
745
IHT Wealth Management
Illinois
$231K -$5.32K -30 -2%
C
746
Certuity
Florida
$231K +$215K +1,211 New
CCFCSB
747
Cape Cod Five Cents Savings Bank
Massachusetts
$230K – – –
NFA
748
Northern Financial Advisors
Michigan
$230K +$214K +1,205 New
BEAM
749
Baker Ellis Asset Management
Washington
$229K – – –
PCM
750
Perkins Capital Management
Minnesota
$229K – – –
28 29
30
31 32

DGX Hedge Fund Activity: Q3 2025 in Review

1,005 of the 7,620 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.