Mariner
DGX icon

Mariner’s Quest Diagnostics DGX Stock Holding History

Mariner’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
2026
Q2 		$4.13M Sell
19,498
-7,344
-27% -$1.44M ﹤0.01% 1117
2026
Q1 		$5.26M Sell
26,842
-18,800
-41% -$3.65M 0.01% 1040
2025
Q4 		$7.92M Buy
45,642
+7,342
+19% +$1.34M 0.01% 814
2025
Q3 		$7.3M Sell
38,300
-10,900
-22% -$1.93M 0.01% 754
2025
Q2 		$8.84M Sell
49,200
-3,172
-6% -$551K 0.01% 644
2025
Q1 		$8.86M Buy
52,372
+219
+0.4% +$36K 0.01% 597
2024
Q4 		$7.87M Buy
52,153
+2,380
+5% +$370K 0.01% 629
2024
Q3 		$7.73M Buy
49,773
+241
+0.5% +$36K 0.01% 612
2024
Q2 		$6.78M Sell
49,532
-4,444
-8% -$609K 0.01% 629
2024
Q1 		$7.18M Buy
53,976
+1,715
+3% +$223K 0.01% 608
2023
Q4 		$7.21M Buy
52,261
+8,119
+18% +$1.07M 0.02% 573
2023
Q3 		$5.38M Sell
44,142
-1,235
-3% -$165K 0.01% 621
2023
Q2 		$6.38M Buy
45,377
+2,484
+6% +$342K 0.02% 565
2023
Q1 		$6.07M Buy
42,893
+2,294
+6% +$328K 0.02% 567
2022
Q4 		$6.35M Buy
40,599
+3,675
+10% +$528K 0.02% 527
2022
Q3 		$4.53M Buy
36,924
+713
+2% +$93.9K 0.02% 536
2022
Q2 		$4.82M Buy
36,211
+23,580
+187% +$3.21M 0.02% 501
2022
Q1 		$1.73M Buy
12,631
+1,184
+10% +$165K 0.01% 761
2021
Q4 		$1.98M Buy
+11,447
New +$1.74M 0.01% 661
2019
Q3 		– Sell
-6,238
Closed -$635K – 763
2019
Q2 		$635K Buy
6,238
+228
+4% +$21.9K 0.01% 642
2019
Q1 		$540K Buy
+6,010
New +$521K 0.01% 643

Other funds holding DGX

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Morgan Stanley
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

Mariner's DGX Position: Q2 2026 in Review

Mariner reduced its Quest Diagnostics (DGX) stake by 27% in Q2 2026, selling an estimated $1.44M and leaving 19,498 shares worth $4.13M. The position accounts for ﹤0.01% of the portfolio, ranked #1117.

Mariner first reported a position in DGX in Q1 2019 and has held it in 21 quarters since. The position peaked at $8.86M in Q1 2025. 1,107 funds tracked by Wall St. Rank hold DGX as of Q2 2026.

  • Mariner held 19,498 shares of Quest Diagnostics worth $4.13M as of Q2 2026.
  • Mariner sold 7,344 Quest Diagnostics shares in Q2 2026, an estimated $1.44M.
  • Quest Diagnostics made up ﹤0.01% of Mariner's portfolio in Q2 2026, its #1117 holding.
  • Mariner first reported a position in Quest Diagnostics in Q1 2019 and has held it in 21 quarters since.
  • Mariner's Quest Diagnostics position peaked at $8.86M in Q1 2025.
  • 1,107 funds tracked by Wall St. Rank held Quest Diagnostics as of Q2 2026.

Based on Mariner's 13F filing for Q2 2026, filed 13 Aug 2026.