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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
QWM
776
Quadcap Wealth Management
Texas
$209K -$10.1K -57 -5%
SMA
777
Sage Mountain Advisors
Georgia
$208K +$194K +1,094 New
IAS
778
Insigneo Advisory Services
Florida
$208K +$194K +1,093 New
MHIC
779
Marble Harbor Investment Counsel
Massachusetts
$206K +$192K +1,080 New
VCA
780
Verdence Capital Advisors
Maryland
$206K +$202K +1,141 New
SWP
781
Significant Wealth Partners
Illinois
$205K +$191K +1,077 New
MWM
782
Maridea Wealth Management
New York
$205K +$191K +1,076 New
BRWA
783
B. Riley Wealth Advisors
Florida
$203K +$189K +1,066 New
O
784
Ossiam
France
$202K +$10.8K +61 +6%
IPWA
785
International Private Wealth Advisors
California
$201K -$17K -96 -8%
IRC
786
Investors Research Corp
Georgia
$201K +$7.99K +45 +4%
ST
787
Smithfield Trust
Pennsylvania
$193K – – –
WTC
788
WhitTier Trust Company
Nevada
$190K – – –
MA
789
Montag & Associates
Georgia
$181K – – –
AUB
790
Atlantic Union Bankshares
Virginia
$181K +$88.7K +500 +111%
CT
791
Clearstead Trust
Maine
$181K +$177 +1 +0.1%
SWM
792
Spire Wealth Management
Virginia
$180K -$12.2K -69 -7%
WSC
793
Wellington Shields & Co
New York
$172K +$160K +900 New
SAM
794
Smartleaf Asset Management
Massachusetts
$171K +$41.5K +234 +35%
LS
795
Livforsakringsbolaget Skandia
Sweden
$169K -$35.5K -200 -18%
WBC
796
Westpac Banking Corp
Australia
$164K -$2.13K -12 -1%
C
797
Covestor
United Kingdom
$159K -$65.3K -368 -31%
Simplex Trading
798
Simplex Trading
Illinois
$154K +$144K +811 New
EDRH
799
Edmond de Rothschild Holding
Switzerland
$145K +$55.4K +312 +69%
HFS
800
Hantz Financial Services
Michigan
$145K +$52K +293 +62%
30 31
32
33 34

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.