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Quest Diagnostics

1,048 hedge funds and large institutions have $18.4B invested in Quest Diagnostics in 2025 Q4 according to their latest regulatory filings, with 148 funds opening new positions, 350 increasing their positions, 345 reducing their positions, and 90 closing their positions.

New
Increased
Maintained
Reduced
Closed

64% more first-time investments, than exits

New positions opened: 148 | Existing positions closed: 90

30% more call options, than puts

Call options by funds: $74.8M | Put options by funds: $57.4M

4% more funds holding

Funds holding: 1,0051,048 (+43)

1.7% more ownership

Funds ownership: 93.86%95.55% (+1.7%)

1% more repeat investments, than reductions

Existing positions increased: 350 | Existing positions reduced: 345

8% less capital invested

Capital invested by funds: $20B → $18.4B (-$1.56B)

33% less funds holding in top 10

Funds holding in top 10: 32 (-1)

Holders
1,048
Holders Change
+43
Holders Change %
+4.28%
% of All Funds
12.75%
Holding in Top 10
2
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-33.33%
% of All Funds
0.02%
New
148
Increased
350
Reduced
345
Closed
90
Calls
$74.8M
Puts
$57.4M
Net Calls
+$17.5M
Net Calls Change
+$31.2M
Name Holding Trade Value Shares
Change
Change in
Stake
Twin Tree Management
1076
Twin Tree Management
Texas
-$543K -2,850 Closed
SPA
1077
Sherbrooke Park Advisers
New York
-$490K -2,571 Closed
BJL
1078
Brighton Jones LLC
Washington
-$486K -2,548 Closed
BBA
1079
Baader Bank Aktiengesellschaft
Germany
-$444K -2,331 Closed
TI
1080
TrueMark Investments
Illinois
-$439K -2,301 Closed
AAMU
1081
APG Asset Management US
New York
-$419K -2,300 Closed
RCM
1082
Requisite Capital Management
Texas
-$429K -2,249 Closed
EFI
1083
EHP Funds Inc
Canada
-$419K -2,200 Closed
RCAG
1084
Rehmann Capital Advisory Group
Michigan
-$317K -1,694 Closed
DC
1085
Davenport & Co
Virginia
-$322K -1,688 Closed
BC
1086
Bayforest Capital
United Kingdom
-$309K -1,619 Closed
MG
1087
Marex Group
-$286K -1,500 Closed
SWP
1088
Stratos Wealth Partners
Ohio
-$282K -1,479 Closed
Caisse de Depot et Placement du Quebec (CDPQ)
1089
Caisse de Depot et Placement du Quebec (CDPQ)
Quebec, Canada
-$266K -1,396 Closed
NP
1090
NorthRock Partners
Minnesota
-$260K -1,363 Closed
FMLI
1091
Fukoku Mutual Life Insurance
Japan
-$255K -1,339 Closed
PCMH
1092
Polymer Capital Management (HK)
Hong Kong
-$254K -1,331 Closed
CFG
1093
Citizens Financial Group
Rhode Island
-$237K -1,241 Closed
BMCM
1094
Bryn Mawr Capital Management
Pennsylvania
-$236K -1,238 Closed
CAMG
1095
CWA Asset Management Group
Florida
-$232K -1,217 Closed
NFA
1096
Northern Financial Advisors
Michigan
-$230K -1,205 Closed
PCM
1097
Perkins Capital Management
Minnesota
-$229K -1,200 Closed
WS
1098
Wedbush Securities
California
-$221K -1,157 Closed
VCA
1099
Verdence Capital Advisors
Maryland
-$206K -1,141 Closed
OFS
1100
OneAscent Financial Services
Alabama
-$217K -1,139 Closed