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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

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

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
ACM
1076
Aster Capital Management
United Arab Emirates
– -$4.13K -23 Closed
TSMHT
1077
Thurston Springer Miller Herd & Titak
Indiana
– -$3.23K -18 Closed
HWA
1078
HHM Wealth Advisors
Tennessee
– -$1.98K -11 Closed
WCM
1079
WealthTrak Capital Management
Virginia
– -$1.08K -6 Closed
SRCM
1080
Signature Resources Capital Management
California
– -$898 -5 Closed
HWP
1081
Highline Wealth Partners
California
– -$719 -4 Closed
SC
1082
Stephens Consulting
Michigan
– -$719 -4 Closed
TIM
1083
Total Investment Management
Arizona
– -$719 -4 Closed
AT
1084
Arlington Trust
Alabama
– -$539 -3 Closed
T
1085
Transce3nd
Texas
– -$539 -3 Closed
CA
1086
Crewe Advisors
Utah
– -$360 -2 Closed
LFA
1087
LGT Financial Advisors
Texas
– -$180 -1 Closed
40 41 42 43
44

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.