Twin Tree Management’s Quest Diagnostics DGX Stock Holding History

Twin Tree Management’s Portfolio DGX Stock Details DGX Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-6,400	Closed	-$1.22M	–	1484
2025 Q3	$1.22M	Buy	+6,400	New	+$1.14M	0.01%	1150
2021 Q4	–	Sell	-5,000	Closed	-$727K	–	1628
2021 Q3	$727K	Buy	+5,000	New	+$732K	﹤0.01%	1239
2017 Q1	–	Sell	-13,400	Closed	-$1.23M	–	1061
2016 Q4	$1.23M	Buy	+13,400	New	+$1.15M	0.01%	736
2016 Q3	–	Sell	-7,100	Closed	-$578K	–	1178
2016 Q2	$578K	Buy	+7,100	New	+$541K	0.01%	800
2015 Q4	–	Sell	-9,000	Closed	-$553K	–	1420
2015 Q3	$553K	Buy	9,000 +6,400	+246%	+$447K	0.01%	743
2015 Q2	$189K	Buy	+2,600	New	+$192K	﹤0.01%	1077

Other funds holding DGX

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

EIG

EdgePoint Investment Group Toronto, Ontario, Canada $13.2B AUM 32.43% 1-Year Est. Return

Twin Tree Management's DGX Position: Q2 2026 in Review

Twin Tree Management opened a new position in Quest Diagnostics (DGX) in Q2 2026: 2,097 shares worth $444K. The stake represents 0.01% of the portfolio and ranks #1050 among its holdings. This is a return to the name: Twin Tree Management previously reported a position in DGX as recently as Q3 2025.

Twin Tree Management first reported a position in DGX in Q1 2015 and has held it in 22 quarters since. The position peaked at $29.4M in Q4 2021. 1,107 funds tracked by Wall St. Rank hold DGX as of Q2 2026.

Twin Tree Management held 2,097 shares of Quest Diagnostics worth $444K as of Q2 2026.
Quest Diagnostics was a new Twin Tree Management position in Q2 2026.
Quest Diagnostics made up 0.01% of Twin Tree Management's portfolio in Q2 2026, its #1050 holding.
Twin Tree Management first reported a position in Quest Diagnostics in Q1 2015 and has held it in 22 quarters since.
Twin Tree Management's Quest Diagnostics position peaked at $29.4M in Q4 2021.
1,107 funds tracked by Wall St. Rank held Quest Diagnostics as of Q2 2026.

Based on Twin Tree Management's 13F filing for Q2 2026, filed 12 Aug 2026.