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Quest Diagnostics

1,062 hedge funds and large institutions have $20.1B invested in Quest Diagnostics in 2026 Q1 according to their latest regulatory filings, with 121 funds opening new positions, 349 increasing their positions, 381 reducing their positions, and 87 closing their positions.

New
Increased
Maintained
Reduced
Closed

139% more call options, than puts

Call options by funds: $96.9M | Put options by funds: $40.5M

100% more funds holding in top 10

Funds holding in top 10: 24 (+2)

39% more first-time investments, than exits

New positions opened: 121 | Existing positions closed: 87

9% more capital invested

Capital invested by funds: $18.4B → $20.1B (+$1.67B)

1% more funds holding

Funds holding: 1,0481,062 (+14)

8% less repeat investments, than reductions

Existing positions increased: 349 | Existing positions reduced: 381

2.22% less ownership

Funds ownership: 95.55%93.33% (-2.2%)

Holders
1,062
Holders Change
+14
Holders Change %
+1.34%
% of All Funds
13.08%
Holding in Top 10
4
Holding in Top 10 Change
+2
Holding in Top 10 Change %
+100%
% of All Funds
0.05%
New
121
Increased
349
Reduced
381
Closed
87
Calls
$96.9M
Puts
$40.5M
Net Calls
+$56.4M
Net Calls Change
+$39M
Name Holding Trade Value Shares
Change
Change in
Stake
DM
1076
Deerfield Management
New York
-$3.19M -18,392 Closed
ACM
1077
Aquatic Capital Management
Illinois
-$3.15M -18,178 Closed
DTL
1078
Dynamic Technology Lab
Singapore
-$2.92M -16,840 Closed
EGM
1079
Engineers Gate Manager
New York
-$2.52M -14,526 Closed
ET
1080
Entropy Technologies
New York
-$1.97M -11,380 Closed
MC
1081
Machina Capital
France
-$1.84M -10,613 Closed
FRM
1082
Fox Run Management
Connecticut
-$1.68M -9,690 Closed
TM
1083
Taproot Management
New York
-$1.66M -9,594 Closed
SM
1084
Sciencast Management
New Jersey
-$1.32M -7,588 Closed
OTL
1085
Oak Thistle LLC
New York
-$1.24M -7,132 Closed
PCM
1086
Prelude Capital Management
New York
-$1.19M -6,886 Closed
PCM
1087
Polymer Capital Management
New York
-$1.18M -6,817 Closed
QCM
1088
Qsemble Capital Management
New York
-$1.15M -6,645 Closed
PS
1089
Pensionfund Sabic
Netherlands
-$1.11M -6,400 Closed
VI
1090
Versor Investments
New York
-$951K -5,482 Closed
GPFA
1091
Game Plan Financial Advisors
Ohio
-$926K -5,338 Closed
ECM
1092
ExodusPoint Capital Management
New York
-$833K -4,802 Closed
LAM
1093
LECAP Asset Management
United Kingdom
-$780K -4,497 Closed
HSA
1094
Hussman Strategic Advisors
Maryland
-$729K -4,200 Closed
Lido Advisors
1095
Lido Advisors
California
-$739K -3,914 Closed
FFM
1096
Forum Financial Management
Illinois
-$617K -3,557 Closed
AWM
1097
Axxcess Wealth Management
California
-$602K -3,468 Closed
MM
1098
MQS Management
New York
-$557K -3,209 Closed
VF
1099
Virtu Financial
New York
-$527K -3,038 Closed
MUAMU
1100
Mitsubishi UFJ Asset Management (UK)
United Kingdom
-$521K -3,000 Closed