IDEXX Laboratories, Inc.
DE ˙ XTRA ˙ US45168D1046
470,40 € ↓ -12,40 (-2,57%)
2026-06-03
AKTIENPREIS
SecurityDE:IX1 / IDEXX Laboratories, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership135,876 shares
Latest Disclosed Value $ 91,927,093
Sei Investments Co reports 31.41% increase in ownership of IX1 / IDEXX Laboratories, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 135,876 shares of IDEXX Laboratories, Inc. (DE:IX1) valued at $79,052,657 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 103,396 shares of IDEXX Laboratories, Inc.. This represents a change in shares of 31.41% during the quarter. The current value of the position is $63,916,070 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)
2026-02-13 2025-12-31 13F IDEXX LABS COM 45168D104 135,876 32,480 31.41 91,927 39.15 0.0907
2025-11-13 2025-09-30 13F IDEXX LABS COM 45168D104 103,396 -17,191 -14.26 66,062 2.14 0.0710
2025-08-14 2025-06-30 13F IDEXX LABS COM 45168D104 120,587 56,692 88.73 64,678 141.04 0.0750
2025-05-14 2025-03-31 13F/A-1 IDEXX LABS COM 45168D104 63,895 29,439 85.44 26,833 88.39 0.0345
2025-05-13 2025-03-31 13F IDEXX LABS COM 45168D104 37,832 3,376 15,725 0.0171
2025-02-11 2024-12-31 13F IDEXX LABS COM 45168D104 34,456 -31,743 -47.95 14,244 -57.42 0.0183
2024-11-12 2024-09-30 13F IDEXX LABS COM 45168D104 66,199 -130,609 -66.36 33,450 -65.12 0.0434
2024-08-13 2024-06-30 13F IDEXX LABS COM 45168D104 196,808 39,455 25.07 95,885 12.86 0.1358
2024-05-07 2024-03-31 13F IDEXX LABS COM 45168D104 157,353 -418 -0.26 84,960 -2.99 0.1245
2024-02-14 2023-12-31 13F IDEXX LABS COM 45168D104 157,771 -23,985 -13.20 87,575 10.19 0.1406
2023-11-14 2023-09-30 13F IDEXX LABS COM 45168D104 181,756 24,194 15.36 79,476 0.44 0.1428
2023-08-11 2023-06-30 13F IDEXX LABS COM 45168D104 157,562 17,663 12.63 79,130 13.11 0.1380
2023-05-12 2023-03-31 13F IDEXX LABS COM 45168D104 139,899 -28,487 -16.92 69,960 1.84 0.1300
2023-02-10 2022-12-31 13F IDEXX LABS COM 45168D104 168,386 25,970 18.24 68,697 48.05 0.1527
2022-11-14 2022-09-30 13F IDEXX LABS COM 45168D104 142,416 26,032 22.37 46,401 13.90 0.1035
2022-08-15 2022-06-30 13F IDEXX LABS COM 45168D104 116,384 7,829 7.21 40,738 -31.61 0.0880
2022-05-13 2022-03-31 13F IDEXX LABS COM 45168D104 108,555 43,478 66.81 59,570 38.89 0.1197
2022-02-14 2021-12-31 13F IDEXX LABS COM 45168D104 65,077 -3,322 -4.86 42,889 0.71 0.0805
2021-11-12 2021-09-30 13F IDEXX LABS COM 45168D104 68,399 48,199 238.61 42,588 232.72 0.0894
2021-08-06 2021-06-30 13F IDEXX LABS COM 45168D104 20,200 -3,983 -16.47 12,800 5.17 0.0284
2021-05-12 2021-03-31 13F IDEXX LABS COM 45168D104 24,183 -3,342 -12.14 12,171 -13.05 0.0307
2021-02-08 2020-12-31 13F IDEXX LABS COM 45168D104 27,525 -1,536 -5.29 13,998 21.34 0.0362
2020-12-04 2020-09-30 13F/A-1 IDEXX LABS COM 45168D104 29,061 6,057 26.33 11,536 51.83 0.0334
2020-11-06 2020-09-30 13F IDEXX LABS COM 45168D104 37,343 14,339 14,792 35,615.8472
2020-08-17 2020-06-30 13F/A-1 IDEXX LABS COM 45168D104 23,004 -97 -0.42 7,598 36.04 0.0236
2020-08-11 2020-06-30 13F IDEXX LABS COM 45168D104 23,293 192 7,552 20,485.2020
2020-05-14 2020-03-31 13F IDEXX LABS COM 45168D104 23,101 -2,876 -11.07 5,585 -17.76 0.0205
2020-02-06 2019-12-31 13F IDEXX LABS COM 45168D104 25,977 -21,742 -45.56 6,791 -47.71 0.0203
2019-11-12 2019-09-30 13F IDEXX LABS COM 45168D104 47,719 -8,585 -15.25 12,987 -16.20 0.0332
2019-08-14 2019-06-30 13F IDEXX LABS COM 45168D104 56,304 -19,406 -25.63 15,498 -8.52 0.0506
2019-05-15 2019-03-31 13F IDEXX LABS COM 45168D104 75,710 36,579 93.48 16,941 95.49 0.0569
2019-02-13 2018-12-31 13F IDEXX LABS COM 45168D104 39,131 2,382 6.48 8,666 -6.21 0.0309
2018-11-08 2018-09-30 13F IDEXX LABS COM 45168D104 36,749 -11,074 -23.16 9,240 -11.36 0.0335
2018-08-03 2018-06-30 13F IDEXX LABS COM 45168D104 47,823 -174 -0.36 10,424 13.48 0.0354
2018-05-11 2018-03-31 13F IDEXX LABS COM 45168D104 47,997 -7,809 -13.99 9,186 5.26 0.0352
2018-02-08 2017-12-31 13F IDEXX LABS COM 45168D104 55,806 12,360 28.45 8,727 29.17 0.0303
2017-11-06 2017-09-30 13F IDEXX LABS COM 45168D104 43,446 4,102 10.43 6,756 6.38 0.0240
2017-07-31 2017-06-30 13F IDEXX LABS COM 45168D104 39,344 19,067 94.03 6,351 102.58 0.0253
2017-05-05 2017-03-31 13F IDEXX LABS COM 45168D104 20,277 8,792 76.55 3,135 132.74 0.0137
2017-02-02 2016-12-31 13F IDEXX LABS COM 45168D104 11,485 223 1.98 1,347 6.15 0.0065
2016-11-04 2016-09-30 13F IDEXX LABS COM 45168D104 11,262 1,737 18.24 1,269 43.39 0.0064
2016-08-11 2016-06-30 13F IDEXX LABS COM 45168D104 9,525 2,640 38.34 885 64.19 0.0053
2016-05-10 2016-03-31 13F/A-1 IDEXX LABS COM 45168D104 6,885 5,926 617.94 539 670.00 0.0034
2016-02-03 2015-12-31 13F IDEXX LABS COM 45168D104 959 316 49.14 70 45.83 0.0004
2015-11-02 2015-09-30 13F/A-1 IDEXX LABS COM 45168D104 643 -265 -29.19 48 -18.64 0.0004
2015-10-30 2015-09-30 13F DIREXION SHS ETF TR COM 45168D104 643 48
2015-08-07 2015-06-30 13F/A-1 IDEXX LABS COM 45168D104 908 386 73.95 59 -24.36 0.0005
2015-08-04 2015-06-30 13F IDEXX LABS COM 45168D104 908 386 59 0.0005
2015-05-14 2015-03-31 13F/A-1 IDEXX LABS COM 45168D104 522 -909 -63.52 78 -63.03 0.0007
2015-05-01 2015-03-31 13F IDEXX LABS COM 45168D104 522 78
2015-02-10 2014-12-31 13F IDEXX LABS COM 45168D104 1,431 1,431 211 0.0019
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.