IDEXX Laboratories, Inc.
US ˙ NasdaqGS ˙ US45168D1046

SecurityIDXX / IDEXX Laboratories, Inc.
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership31,292 shares
Latest Disclosed Value $ 17,583,313
Advisor Group Holdings, Inc. reports 1.11% increase in ownership of IDXX / IDEXX Laboratories, Inc.

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 31,292 shares of IDEXX Laboratories, Inc. (US:IDXX) valued at $17,582,662 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 30,948 shares of IDEXX Laboratories, Inc.. This represents a change in shares of 1.11% during the quarter. The current value of the position is $17,591,111 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)
2026-05-15 2026-03-31 13F IDEXX LABS COM 45168D104 31,292 344 1.11 17,583 -16.02 0.0150
2026-02-17 2025-12-31 13F IDEXX LABS COM 45168D104 30,948 14,538 88.59 20,938 98.78 0.0306
2025-11-14 2025-09-30 13F IDEXX LABS COM 45168D104 16,410 3,952 31.72 10,534 66.87 0.0147
2025-09-04 2025-06-30 13F/A-1 DEXX LABS COM 45168D104 12,458 1,710 15.91 6,312 39.86 0.0112
2025-08-13 2025-06-30 13F DEXX LABS COM 45168D104 13,620 2,872 5,893 0.0068
2025-05-12 2025-03-31 13F IDEXX LABS COM 45168D104 10,748 -5,055 -31.99 4,514 4.69 0.0101
2025-06-06 2024-12-31 13F/A-1 IDEXX LABS COM 45168D104 15,803 -3,331 -17.41 4,312 -55.40 0.0097
2025-02-07 2024-12-31 13F IDEXX LABS COM 45168D104 20,888 1,754 7,659 0.0195
2024-11-13 2024-09-30 13F IDEXX LABS COM 45168D104 19,134 -1,119 -5.53 9,667 -2.03 0.0218
2024-08-13 2024-06-30 13F IDEXX LABS COM 45168D104 20,253 578 2.94 9,867 -7.12 0.0233
2024-05-10 2024-03-31 13F IDEXX LABS COM 45168D104 19,675 -8,484 -30.13 10,623 -32.00 0.0237
2024-02-12 2023-12-31 13F IDEXX LABS COM 45168D104 28,159 -14,971 -34.71 15,621 -17.17 0.0273
2023-11-13 2023-09-30 13F IDEXX LABS COM 45168D104 43,130 9,125 26.83 18,860 10.40 0.0279
2023-08-21 2023-06-30 13F/A-1 IDEXX LABS COM 45168D104 34,005 363 1.08 17,084 1.78 0.0307
2023-08-10 2023-06-30 13F IDEXX LABS COM 45168D104 42,025 8,383 17,076 0.0046
2023-05-12 2023-03-31 13F IDEXX LABS COM 45168D104 33,642 1,508 4.69 16,786 28.04 0.0316
2023-02-10 2022-12-31 13F IDEXX LABS COM 45168D104 32,134 -2,103 -6.14 13,109 17.53 0.0265
2022-11-14 2022-09-30 13F IDEXX LABS COM 45168D104 34,237 1,319 4.01 11,154 -3.40 0.0255
2022-08-10 2022-06-30 13F IDEXX LABS COM 45168D104 32,918 1,802 5.79 11,547 -31.68 0.0255
2022-05-04 2022-03-31 13F IDEXX LABS COM 45168D104 31,116 -131 -0.42 16,902 -17.82 0.0328
2022-02-03 2021-12-31 13F IDEXX LABS COM 45168D104 31,247 -2,175 -6.51 20,567 -1.06 0.0389
2021-11-05 2021-09-30 13F IDEXX LABS COM 45168D104 33,422 1,597 5.02 20,787 3.42 0.0433
2021-08-02 2021-06-30 13F IDEXX LABS COM 45168D104 31,825 -6,455 -16.86 20,100 7.35 0.0435
2021-05-13 2021-03-31 13F IDEXX LABS COM 45168D104 38,280 1,524 4.15 18,724 1.94 0.0450
2021-02-10 2020-12-31 13F IDEXX LABS COM 45168D104 36,756 5,810 18.77 18,368 52.27 0.0490
2020-11-12 2020-09-30 13F IDEXX LABS COM 45168D104 30,946 1,535 5.22 12,063 24.22 0.0361
2020-08-14 2020-06-30 13F IDEXX LABS COM 45168D104 29,411 -24,698 -45.64 9,711 74.91 0.0326
2020-05-18 2020-03-31 13F IDEXX LABS COM 45168D104 54,109 54,109 5,552 0.0227
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.