IDEXX Laboratories, Inc.
US ˙ NasdaqGS ˙ US45168D1046

SecurityIDXX / IDEXX Laboratories, Inc.
InstitutionPrudential Plc
Latest Disclosed Ownership42,050 shares
Latest Disclosed Value $ 23,627,474
Prudential Plc reports 18.68% decrease in ownership of IDXX / IDEXX Laboratories, Inc.

On May 14, 2026 - Prudential Plc filed a 13F-HR form disclosing ownership of 42,050 shares of IDEXX Laboratories, Inc. (US:IDXX) valued at $23,627,474 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 51,709 shares of IDEXX Laboratories, Inc.. This represents a change in shares of -18.68% during the quarter. The current value of the position is $23,578,696 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F IDEXX LABS COM 45168D104 42,050 -9,659 -18.68 23,627 -32.46 0.1019
2026-02-11 2025-12-31 13F IDEXX LABS COM 45168D104 51,709 5,507 11.92 34,983 18.51 0.2774
2025-11-14 2025-09-30 13F IDEXX LABS COM 45168D104 46,202 -3,556 -7.15 29,518 10.60 0.2169
2025-08-12 2025-06-30 13F IDEXX LABS COM 45168D104 49,758 -11,128 -18.28 26,687 4.37 0.1609
2025-05-13 2025-03-31 13F IDEXX LABS COM 45168D104 60,886 8,214 15.59 25,569 17.42 0.1280
2025-02-13 2024-12-31 13F IDEXX LABS COM 45168D104 52,672 1,835 3.61 21,777 -15.21 0.1095
2024-11-13 2024-09-30 13F IDEXX LABS COM 45168D104 50,837 -13,235 -20.66 25,684 -17.72 0.1290
2024-08-07 2024-06-30 13F IDEXX LABS COM 45168D104 64,072 5,086 8.62 31,216 -1.99 0.2105
2024-05-14 2024-03-31 13F IDEXX LABS COM 45168D104 58,986 48,925 486.28 31,848 470.34 0.2427
2024-02-14 2023-12-31 13F IDEXX LABS COM 45168D104 10,061 41 0.41 5,584 27.46 0.0567
2023-11-13 2023-09-30 13F IDEXX LABS COM 45168D104 10,020 5,506 121.98 4,381 93.25 0.0487
2023-08-14 2023-06-30 13F IDEXX LABS COM 45168D104 4,514 -510 -10.15 2,267 -9.75 0.0265
2023-05-12 2023-03-31 13F IDEXX LABS COM 45168D104 5,024 -1,518 -23.20 2,512 -5.85 0.0295
2023-02-09 2022-12-31 13F IDEXX LABS COM 45168D104 6,542 -631 -8.80 2,669 14.16 0.0335
2022-11-14 2022-09-30 13F IDEXX LABS COM 45168D104 7,173 2,667 59.19 2,337 47.91 0.0370
2022-08-12 2022-06-30 13F IDEXX LABS COM 45168D104 4,506 503 12.57 1,580 -27.85 0.0286
2022-05-13 2022-03-31 13F IDEXX LABS COM 45168D104 4,003 1,874 88.02 2,190 56.21 0.0317
2022-02-11 2021-12-31 13F IDEXX LABS COM 45168D104 2,129 2,129 1,402 0.0192
2019-11-12 2019-09-30 13F IDEXX LABS COM 45168D104 0 -1,266 -100.00 0 -100.00
2019-10-04 2019-06-30 13F/A-1 IDEXX LABS COM 45168D104 1,266 1,266 348 0.0011
2019-08-14 2019-06-30 13F IDEXX LABS COM 45168D104 1,266 1,266 348
2017-05-15 2017-03-31 13F IDEXX LABORATORIES COM USD0.10 45168D104 0 -6,200 -100.00 0 -100.00
2017-02-09 2016-12-31 13F IDEXX LABORATORIES COM USD0.10 45168D104 6,200 0 0.00 727 4.01 0.0026
2016-11-14 2016-09-30 13F IDEXX LABORATORIES COM USD0.10 45168D104 6,200 0 0.00 699 21.35 0.0026
2016-08-09 2016-06-30 13F IDEXX LABORATORIES COM USD0.10 45168D104 6,200 0 0.00 576 18.52 0.0023
2016-05-13 2016-03-31 13F IDEXX LABORATORIES COM USD0.10 45168D104 6,200 0 0.00 486 7.52 0.0020
2016-02-12 2015-12-31 13F IDEXX LABORATORIES COM USD0.10 45168D104 6,200 0 0.00 452 -1.74 0.0018
2015-11-13 2015-09-30 13F IDEXX LABORATORIES COM USD0.10 45168D104 6,200 0 0.00 460 15.58 0.0020
2015-08-14 2015-06-30 13F IDEXX LABORATORIES COM USD0.10 45168D104 6,200 0 0.00 398 -58.46 0.0015
2015-05-15 2015-03-31 13F IDEXX LABORATORIES COM USD0.10 45168D104 6,200 6,200 958 0.0042
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.