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
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 $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
BAMCO Inc
BAMCO Inc New York $33.1B AUM 11.16% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $544B AUM 28.31% 1-Year Est. Return
Fundsmith LLP
Fundsmith LLP London, United Kingdom $12.8B AUM 6.9% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Mariner's IDXX Position: Q1 2026 in Review

Mariner reduced its Idexx Laboratories (IDXX) stake by 79% in Q1 2026, selling an estimated $7.36M and leaving 3,016 shares worth $1.69M. The position accounts for ﹤0.01% of the portfolio, ranked #1616.

Mariner first reported a position in IDXX in Q2 2019 and has held it in 16 quarters since. The position peaked at $12.3M in Q3 2025. 1,311 funds tracked by Wall St. Rank hold IDXX as of Q1 2026.

  • Mariner held 3,016 shares of Idexx Laboratories worth $1.69M as of Q1 2026.
  • Mariner sold 11,475 Idexx Laboratories shares in Q1 2026, an estimated $7.36M.
  • Idexx Laboratories made up ﹤0.01% of Mariner's portfolio in Q1 2026, its #1616 holding.
  • Mariner first reported a position in Idexx Laboratories in Q2 2019 and has held it in 16 quarters since.
  • Mariner's Idexx Laboratories position peaked at $12.3M in Q3 2025.
  • 1,311 funds tracked by Wall St. Rank held Idexx Laboratories as of Q1 2026.

Based on Mariner's 13F filing for Q1 2026, filed 13 May 2026.