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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
TG
201
TCW Group
California
$6.05M
ATC
202
Argent Trust Co
Tennessee
$5.98M
BTW
203
Boston Trust Walden
Massachusetts
$5.96M
AM
204
Atwater Malick
Pennsylvania
$5.94M
ASRS
205
Arizona State Retirement System
Arizona
$5.93M
TAIM
206
Te Ahumairangi Investment Management
New Zealand
$5.92M
CNB
207
Czech National Bank
Czech Republic
$5.87M
TFA
208
Toth Financial Advisory
Virginia
$5.83M
Zurich Cantonal Bank
209
Zurich Cantonal Bank
Switzerland
$5.75M
ILCM
210
Ivy Lane Capital Management
Florida
$5.68M
SOMRS
211
State of Michigan Retirement System
Michigan
$5.63M
TCA
212
Teewinot Capital Advisers
New York
$5.61M
N
213
Natixis
France
$5.52M
OAM
214
Occidental Asset Management
California
$5.43M
SIA
215
SGL Investment Advisors
Montana
$5.36M
Rockefeller Capital Management
216
Rockefeller Capital Management
New York
$5.34M
SFA
217
Sequoia Financial Advisors
Ohio
$5.3M
TSW
218
Thompson Siegel & Walmsley
Virginia
$5.26M
Mariner
219
Mariner
Kansas
$5.26M
WorldQuant Millennium Advisors
220
WorldQuant Millennium Advisors
New York
$5.24M
Capital Fund Management (CFM)
221
Capital Fund Management (CFM)
France
$5.21M
CYG
222
Clean Yield Group
Vermont
$5.16M
MIM
223
MetLife Investment Management
New Jersey
$5.04M
COPPSERS
224
Commonwealth of Pennsylvania Public School Employees Retirement System
Pennsylvania
$5.02M
SA
225
Sanctuary Advisors
Indiana
$5M