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Quest Diagnostics

1,061 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, 380 reducing their positions, and 87 closing their positions.

New
Increased
Maintained
Reduced
Closed

more call options, than puts

Call options by funds: $ | Put options by funds: $

more funds holding in top 10

Funds holding in top 10:

more first-time investments, than exits

New positions opened: | Existing positions closed:

more capital invested

Capital invested by funds: $ → $

1% more funds holding

Funds holding: 1,0471,061 (+14)

8% less repeat investments, than reductions

Existing positions increased: 349 | Existing positions reduced: 380

2.22% less ownership

Funds ownership: 95.54%93.32% (-2.2%)

Holders
1,061
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
4
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$96.9M
Puts
$40.5M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
MDSL
51
M.D. Sass LLC
New York
$58.7M
Schroder Investment Management Group
52
Schroder Investment Management Group
United Kingdom
$58.2M
Citigroup
53
Citigroup
New York
$56.3M
BNP Paribas Financial Markets
54
BNP Paribas Financial Markets
France
$53M
Sumitomo Mitsui Trust Group
55
Sumitomo Mitsui Trust Group
Japan
$51.9M
RhumbLine Advisers
56
RhumbLine Advisers
Massachusetts
$51.6M
VLKIM
57
Van Lanschot Kempen Investment Management
Netherlands
$50.2M
Mitsubishi UFJ Asset Management
58
Mitsubishi UFJ Asset Management
Japan
$49.3M
VGA
59
Vanguard Global Advisers
Pennsylvania
$47.5M
ECSS
60
Eurizon Capital SGR SpA
$47.2M
Acadian Asset Management
61
Acadian Asset Management
Massachusetts
$46.9M
California Public Employees Retirement System
62
California Public Employees Retirement System
California
$46.6M
CCMG
63
Clark Capital Management Group
Pennsylvania
$46.1M
QCM
64
Quantinno Capital Management
New York
$45.3M
BNP Paribas Asset Management
65
BNP Paribas Asset Management
France
$45.3M
VAM
66
Vanguard Asset Management
$44.4M
SG Americas Securities
67
SG Americas Securities
New York
$42.6M
NAMI
68
Nomura Asset Management International
Pennsylvania
$41.6M
Bank of Montreal
69
Bank of Montreal
Ontario, Canada
$41.2M
Marshall Wace
70
Marshall Wace
United Kingdom
$39.3M
Royal Bank of Canada
71
Royal Bank of Canada
Ontario, Canada
$38.9M
HSBC Holdings
72
HSBC Holdings
United Kingdom
$38.2M
VOYA Investment Management
73
VOYA Investment Management
Georgia
$36.5M
CI
74
Conning Inc
Connecticut
$34.5M
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
75
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Ontario, Canada
$33.5M