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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
SLAM
151
Swiss Life Asset Management
$10.4M +$1.85M +9,528 +22%
New York State Common Retirement Fund
152
New York State Common Retirement Fund
New York
$10.4M
Royal London Asset Management
153
Royal London Asset Management
United Kingdom
$10.1M +$1.4M +7,193 +16%
AG
154
AIA Group
Hong Kong
$9.87M -$928K -4,777 -9%
AQR Capital Management
155
AQR Capital Management
Connecticut
$9.85M -$3.29M -16,950 -25%
Vontobel Holding
156
Vontobel Holding
Switzerland
$9.85M -$2.04M -10,498 -17%
Millennium Management
157
Millennium Management
New York
$9.83M +$340K +1,750 +4%
CC
158
Casdin Capital
New York
$9.8M
PP
159
Prudential plc
United Kingdom
$9.66M
HCM
160
Hilton Capital Management
New York
$9.64M +$279K +1,435 +3%
National Bank of Canada
161
National Bank of Canada
Quebec, Canada
$9.6M -$9.88M -50,830 -51%
Nomura Asset Management
162
Nomura Asset Management
Japan
$9.57M +$79.5K +409 +0.8%
Lazard Asset Management
163
Lazard Asset Management
New York
$9.52M -$5.29M -27,248 -36%
Asset Management One
164
Asset Management One
Japan
$9.27M +$388K +1,997 +4%
National Pension Service
165
National Pension Service
South Korea
$9.23M +$718K +3,697 +9%
HA
166
Heartland Advisors
Wisconsin
$9.21M -$248K -1,277 -3%
KOCAA
167
Knights of Columbus Asset Advisors
Connecticut
$9.17M +$135K +693 +2%
TAF
168
Tredje AP-fonden
Sweden
$9.13M +$6.48M +33,372 +252%
Calamos Advisors
169
Calamos Advisors
Illinois
$8.53M +$8.45M +43,506 New
RAM
170
Resona Asset Management
Japan
$8.5M -$28K -144 -0.3%
Commonwealth Equity Services
171
Commonwealth Equity Services
Massachusetts
$8.4M -$591K -3,042 -7%
MSV
172
MN Services Vermogensbeheer
Netherlands
$8.3M
AGP
173
Artia Global Partners
Florida
$8M
Neuberger Berman Group
174
Neuberger Berman Group
New York
$7.97M -$616K -3,169 -7%
CBU
175
CIBC Bancorp USA
Illinois
$7.79M +$7.73M +39,761 New