IDEXX Laboratories, Inc.
US ˙ NasdaqGS ˙ US45168D1046

SecurityIDXX / IDEXX Laboratories, Inc.
InstitutionNatixis Advisors, L.p.
Latest Disclosed Ownership64,462 shares
Latest Disclosed Value $ 36,221
Natixis Advisors, L.p. reports 16.04% decrease in ownership of IDXX / IDEXX Laboratories, Inc.

On May 13, 2026 - Natixis Advisors, L.p. filed a 13F-HR form disclosing ownership of 64,462 shares of IDEXX Laboratories, Inc. (US:IDXX) valued at $36,220,553 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 76,773 shares of IDEXX Laboratories, Inc.. This represents a change in shares of -16.04% during the quarter. The current value of the position is $36,145,777 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-13 2026-03-31 13F IDEXX LABS COM 45168D104 64,462 -12,311 -16.04 36 -29.41 0.0504
2026-02-10 2025-12-31 13F IDEXX LABS COM 45168D104 76,773 30,528 66.01 52 75.86 0.0736
2025-11-13 2025-09-30 13F IDEXX LABS INC COM 45168D104 46,245 -1,163 -2.45 30 16.00 0.0431
2025-08-13 2025-06-30 13F IDEXX LABS COM 45168D104 47,408 -353 -0.74 25 25.00 0.0403
2025-05-08 2025-03-31 13F IDEXX LABS COM 45168D104 47,761 2,590 5.73 20 11.11 0.0371
2025-02-10 2024-12-31 13F IDEXX LABS COM 45168D104 45,171 1,997 4.63 19 -14.29 0.0349
2024-11-06 2024-09-30 13F IDEXX LABS COM 45168D104 43,174 3,206 8.02 22 10.53 0.0425
2024-08-01 2024-06-30 13F IDEXX LABS COM 45168D104 39,968 -15,083 -27.40 19 -34.48 0.0423
2024-04-25 2024-03-31 13F IDEXX LABS COM 45168D104 55,051 -5,368 -8.88 30 -12.12 0.0683
2024-02-06 2023-12-31 13F IDEXX LABS COM 45168D104 60,419 9,396 18.42 34 50.00 0.0883
2023-11-13 2023-09-30 13F IDEXX LABS COM 45168D104 51,023 -5,163 -9.19 22 -21.43 0.0682
2023-08-15 2023-06-30 13F IDEXX LABS COM 45168D104 56,186 5,386 10.60 28 12.00 0.0871
2023-05-11 2023-03-31 13F IDEXX LABS COM 45168D104 50,800 24,018 89.68 25 150.00 0.0874
2023-01-27 2022-12-31 13F IDEXX LABS COM 45168D104 26,782 -3,932 -12.80 11 -99.90 0.0413
2022-11-14 2022-09-30 13F IDEXX LABS COM 45168D104 30,714 -406 -1.30 10,007 -8.32 0.0423
2022-08-12 2022-06-30 13F IDEXX LABS COM 45168D104 31,120 13,587 77.49 10,915 13.79 0.0480
2022-05-12 2022-03-31 13F IDEXX LABS COM 45168D104 17,533 915 5.51 9,592 -12.34 0.0366
2022-02-08 2021-12-31 13F IDEXX LABS COM 45168D104 16,618 -6,053 -26.70 10,942 -22.39 0.0418
2021-11-15 2021-09-30 13F IDEXX LABS COM 45168D104 22,671 -74,060 -76.56 14,099 -76.92 0.0580
2021-08-12 2021-06-30 13F IDEXX LABS COM 45168D104 96,731 259 0.27 61,090 29.41 0.2851
2021-05-05 2021-03-31 13F IDEXX LABS COM 45168D104 96,472 -10,813 -10.08 47,205 -11.98 0.2464
2021-02-12 2020-12-31 13F IDEXX LABS COM 45168D104 107,285 13,858 14.83 53,629 46.02 0.3089
2020-11-12 2020-09-30 13F IDEXX LABS COM 45168D104 93,427 -3,408 -3.52 36,727 14.88 0.2311
2020-08-11 2020-06-30 13F IDEXX LABS COM 45168D104 96,835 28,819 42.37 31,971 94.05 0.2122
2020-04-27 2020-03-31 13F IDEXX LABS COM 45168D104 68,016 50,055 278.69 16,476 251.30 0.1343
2020-02-10 2019-12-31 13F IDEXX LABS COM 45168D104 17,961 1,815 11.24 4,690 6.81 0.0331
2019-11-12 2019-09-30 13F IDEXX LABORATORIES COM 45168D104 16,146 239 1.50 4,391 0.25 0.0349
2019-08-12 2019-06-30 13F IDEXX LABORATORIES INDX TRCK FD UNIT 45168D104 15,907 1,182 8.03 4,380 33.01 0.0358
2019-05-15 2019-03-31 13F/A-1 IDEXX LABORATORIES COM 45168D104 14,725 14,725 3,293 0.0288
2019-05-15 2019-03-31 13F IDEXX LABORATORIES COM 45168D104 14,725 14,725 3,293
2019-02-13 2018-12-31 13F/A-1 IDEXX LABS COM 45168D104 0 -12,036 -100.00 0 -100.00
2018-11-13 2018-09-30 13F IDEXX LABS COM 45168D104 12,036 12,036 3,005 0.0265
2018-08-14 2018-06-30 13F/A-1 IDEXX LABS COM 45168D104 0 -10,797 -100.00 0 -100.00
2018-05-10 2018-03-31 13F IDEXX LABS COM 45168D104 10,797 10,797 2,066 0.0204
2017-07-27 2017-06-30 13F IDEXX LABS COM 45168D104 0 -11,797 -100.00 0 -100.00
2017-05-12 2017-03-31 13F IDEXX LABS COM 45168D104 11,797 -1,718 -12.71 1,824 15.08 0.0202
2017-02-07 2016-12-31 13F IDEXX LABS COM 45168D104 13,515 115 0.86 1,585 4.90 0.0191
2016-11-04 2016-09-30 13F IDEXX LABS COM 45168D104 13,400 348 2.67 1,511 24.67 0.0196
2016-08-01 2016-06-30 13F IDEXX LABS COM 45168D104 13,052 -11,286 -46.37 1,212 -36.41 0.0168
2016-05-06 2016-03-31 13F IDEXX LABS COM 45168D104 24,338 2,635 12.14 1,906 20.40 0.0285
2016-02-12 2015-12-31 13F IDEXX LABS COM 45168D104 21,703 -392 -1.77 1,583 -3.53 0.0259
2015-11-12 2015-09-30 13F IDEXX LABS COM 45168D104 22,095 2,223 11.19 1,641 28.71 0.0285
2015-08-14 2015-06-30 13F IDEXX LABS COM 45168D104 19,872 19,872 0.00 1,275 0.0216
2014-11-03 2014-09-30 13F IDEXX LABS COM 45168D104 0 -8,606 -100.00 0 -100.00
2014-08-13 2014-06-30 13F IDEXX LABS COM 45168D104 8,606 522 6.46 1,150 17.23 0.0165
2014-05-13 2014-03-31 13F IDEXX LABS COM 45168D104 8,084 274 3.51 981 18.05 0.0151
2014-02-12 2013-12-31 13F IDEXX LABS COM 45168D104 7,810 730 10.31 831 17.71 0.0136
2013-10-30 2013-09-30 13F IDEXX LABS COM 45168D104 7,080 1,368 23.95 706 37.89 0.0130
2013-07-19 2013-06-30 13F IDEXX LABS COM 45168D104 5,712 5,712 512 0.0102
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.