Marshall Wace’s Idexx Laboratories IDXX Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $27.7M | Buy |
49,295
+48,068
| +3,918% | +$30.8M | 0.03% | 583 |
|
|
2025
Q4 | $830K | Buy |
1,227
+727
| +145% | +$495K | ﹤0.01% | 2023 |
|
|
2025
Q3 | $319K | Sell |
500
-19,500
| -98% | -$11.8M | ﹤0.01% | 2403 |
|
|
2025
Q2 | $10.7M | Sell |
20,000
-90,549
| -82% | -$43.3M | 0.01% | 812 |
|
|
2025
Q1 | $46.4M | Sell |
110,549
-96,565
| -47% | -$41.9M | 0.06% | 288 |
|
|
2024
Q4 | $85.6M | Buy |
207,114
+178,841
| +633% | +$78.4M | 0.1% | 184 |
|
|
2024
Q3 | $14.3M | Buy |
28,273
+7,773
| +38% | +$3.78M | 0.02% | 624 |
|
|
2024
Q2 | $9.99M | Buy |
20,500
+500
| +3% | +$251K | 0.01% | 733 |
|
|
2024
Q1 | $10.8M | Sell |
20,000
-28,287
| -59% | -$15.5M | 0.02% | 722 |
|
|
2023
Q4 | $26.8M | Buy |
48,287
+28,287
| +141% | +$13.3M | 0.05% | 394 |
|
|
2023
Q3 | $8.75M | Sell |
20,000
-31,983
| -62% | -$15.9M | 0.02% | 685 |
|
|
2023
Q2 | $26.1M | Sell |
51,983
-247,165
| -83% | -$118M | 0.05% | 386 |
|
|
2023
Q1 | $150M | Buy |
+299,148
| New | +$143M | 0.32% | 61 |
|
|
2022
Q4 | – | Sell |
-31,553
| Closed | -$10.3M | – | 3156 |
|
|
2022
Q3 | $10.3M | Buy |
+31,553
| New | +$11.6M | 0.02% | 865 |
|
|
2022
Q1 | – | Sell |
-2,942
| Closed | -$1.94M | – | 3631 |
|
|
2021
Q4 | $1.94M | Sell |
2,942
-8,987
| -75% | -$5.64M | ﹤0.01% | 2069 |
|
|
2021
Q3 | $7.42M | Sell |
11,929
-22,249
| -65% | -$15M | 0.03% | 730 |
|
|
2021
Q2 | $21.6M | Buy |
34,178
+12,985
| +61% | +$7.17M | 0.1% | 217 |
|
|
2021
Q1 | $10.4M | Buy |
+21,193
| New | +$10.6M | 0.05% | 429 |
|
|
2020
Q2 | – | Sell |
-271
| Closed | -$65K | – | 1740 |
|
|
2020
Q1 | $65K | Sell |
271
-77,688
| -100% | -$20.3M | ﹤0.01% | 1387 |
|
|
2019
Q4 | $20.4M | Buy |
77,959
+5,355
| +7% | +$1.41M | 0.14% | 169 |
|
|
2019
Q3 | $19.7M | Sell |
72,604
-172,676
| -70% | -$48.1M | 0.16% | 153 |
|
|
2019
Q2 | $67.5M | Sell |
245,280
-15,996
| -6% | -$3.94M | 0.56% | 21 |
|
|
2019
Q1 | $58.4M | Buy |
261,276
+102,660
| +65% | +$21.2M | 0.55% | 24 |
|
|
2018
Q4 | $29.5M | Buy |
158,616
+151,351
| +2,083% | +$31M | 0.3% | 62 |
|
|
2018
Q3 | $1.81M | Sell |
7,265
-203,268
| -97% | -$49.3M | 0.02% | 698 |
|
|
2018
Q2 | $45.9M | Buy |
+210,533
| New | +$43.4M | 0.69% | 29 |
|
|
2018
Q1 | – | Sell |
-11,132
| Closed | -$1.74M | – | 605 |
|
|
2017
Q4 | $1.74M | Buy |
11,132
+151
| +1% | +$23.8K | 0.07% | 197 |
|
|
2017
Q3 | $1.7M | Buy |
+10,981
| New | +$1.74M | 0.08% | 180 |
|
|
2016
Q3 | – | Sell |
-150,094
| Closed | -$13.9M | – | 1031 |
|
|
2016
Q2 | $13.9M | Buy |
+150,094
| New | +$12.9M | 0.12% | 193 |
|
|
2015
Q4 | – | Sell |
-19,374
| Closed | -$1.44M | – | 1042 |
|
|
2015
Q3 | $1.44M | Sell |
19,374
-178,905
| -90% | -$12.8M | 0.02% | 540 |
|
|
2015
Q2 | $12.7M | Buy |
+198,279
| New | +$13.7M | 0.17% | 143 |
|
Other funds holding IDXX
VCM
VPM
Marshall Wace's IDXX Position: Q1 2026 in Review
Marshall Wace increased its Idexx Laboratories (IDXX) stake by 3,918% in Q1 2026, buying an estimated $30.8M and bringing the position to 49,295 shares worth $27.7M. The position accounts for 0.03% of the portfolio, ranked #583.
Marshall Wace first reported a position in IDXX in Q2 2015 and has held it in 31 quarters since. The position peaked at $150M in Q1 2023. 1,311 funds tracked by Wall St. Rank hold IDXX as of Q1 2026.
- Marshall Wace held 49,295 shares of Idexx Laboratories worth $27.7M as of Q1 2026.
- Marshall Wace bought 48,068 Idexx Laboratories shares in Q1 2026, an estimated $30.8M.
- Idexx Laboratories made up 0.03% of Marshall Wace's portfolio in Q1 2026, its #583 holding.
- Marshall Wace first reported a position in Idexx Laboratories in Q2 2015 and has held it in 31 quarters since.
- Marshall Wace's Idexx Laboratories position peaked at $150M in Q1 2023.
- 1,311 funds tracked by Wall St. Rank held Idexx Laboratories as of Q1 2026.
Based on Marshall Wace's 13F filing for Q1 2026, filed 15 May 2026.