Mariner
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Mariner’s Idexx Laboratories IDXX Stock Holding History

Mariner’s Portfolio IDXX Stock Details IDXX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		– Sell
-3,016
Closed -$1.69M – 3722
2026
Q1 		$1.69M Sell
3,016
-11,475
-79% -$7.36M ﹤0.01% 1616
2025
Q4 		$9.81M Sell
14,491
-4,812
-25% -$3.28M 0.01% 713
2025
Q3 		$12.3M Buy
19,303
+636
+3% +$386K 0.02% 556
2025
Q2 		$10M Buy
18,667
+3,304
+22% +$1.58M 0.01% 598
2025
Q1 		$6.45M Buy
15,363
+1,895
+14% +$823K 0.01% 717
2024
Q4 		$5.57M Sell
13,468
-2,365
-15% -$1.04M 0.01% 756
2024
Q3 		$8M Buy
15,833
+1,135
+8% +$551K 0.01% 599
2024
Q2 		$7.16M Sell
14,698
-258
-2% -$130K 0.01% 610
2024
Q1 		$8.07M Buy
14,956
+503
+3% +$275K 0.02% 567
2023
Q4 		$8.02M Buy
14,453
+2,646
+22% +$1.24M 0.02% 538
2023
Q3 		$5.16M Buy
11,807
+282
+2% +$141K 0.01% 632
2023
Q2 		$5.79M Sell
11,525
-687
-6% -$329K 0.02% 598
2023
Q1 		$6.1M Buy
12,212
+439
+4% +$210K 0.02% 565
2022
Q4 		$4.8M Buy
11,773
+2,570
+28% +$998K 0.02% 618
2022
Q3 		$3M Buy
+9,203
New +$3.38M 0.01% 646
2019
Q3 		– Sell
-777
Closed -$214K – 846
2019
Q2 		$214K Buy
+777
New +$191K ﹤0.01% 1020

Other funds holding IDXX

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
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
BAMCO Inc
BAMCO Inc New York $66.6B AUM 7.35% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $609B AUM 40.19% 1-Year Est. Return
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $225B AUM 49.49% 1-Year Est. Return

Mariner's IDXX Position: Q2 2026 in Review

Mariner sold out of Idexx Laboratories (IDXX) in Q2 2026, closing a stake of 3,016 shares — an estimated $1.69M sold.

Mariner first reported a position in IDXX in Q2 2019 and held it in 16 quarters. The position peaked at $12.3M in Q3 2025. 1,302 funds tracked by Wall St. Rank hold IDXX as of Q2 2026.

  • Mariner reported no remaining Idexx Laboratories position as of Q2 2026 after selling out during the quarter.
  • Mariner sold 3,016 Idexx Laboratories shares in Q2 2026, an estimated $1.69M.
  • Mariner first reported a position in Idexx Laboratories in Q2 2019 and held it in 16 quarters.
  • Mariner's Idexx Laboratories position peaked at $12.3M in Q3 2025.
  • 1,302 funds tracked by Wall St. Rank held Idexx Laboratories as of Q2 2026.

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