PARNASSUS INVESTMENTS, LLC
Position in IDXX — Idexx Laboratories Inc /De
CIK 948669
San Francisco, CA
Position in IDXX
as of Mar 31, 2026
· filed May 12, 2026
Position Value
$18,378,860
-$4,387,051 QoQ
Shares Held
32,709
-2.8% QoQ
Ownership
0.041%
of shares outstanding
% of Portfolio
0.06%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in IDXX Over Time
Shares Held
Position Value (USD)
Position in Diagnostics & Research
Healthcare · as of Mar 31, 2026PARNASSUS INVESTMENTS, LLC holds $1,610,890,284 across 6 Diagnostics & Research names. IDXX ranks #4 (1.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | DHR |
Danaher Corp /De/
|
3,974,829 | $753,627,578 | |
| 2 | TMO |
Thermo Fisher Scientific Inc.
|
1,504,651 | $739,581,106 | |
| 3 | A |
Agilent Technologies, Inc.
|
586,689 | $66,870,812 | |
| 4 | IDXX |
Idexx Laboratories Inc /De
This page
|
32,709 | $18,378,860 | |
| 5 | MTD |
Mettler Toledo International Inc/
|
13,864 | $17,485,276 | |
| 6 | NTRA |
Natera, Inc.
|
74,737 | $14,946,652 |
All Filings in IDXX
Export CSV
25 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $18,378,860 | 32,709 | Shares | Sole | 2026-05-12 | |
| 2025-12-31 | $22,765,911 | 33,651 | Shares | Sole | 2026-02-12 | |
| 2025-09-30 | $21,004,786 | 32,877 | Shares | Sole | 2025-10-24 | |
| 2025-06-30 | $17,826,332 | 33,237 | Shares | Sole | 2025-08-06 | |
| 2025-03-31 | $15,392,427 | 36,653 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $19,988,583 | 48,347 | Shares | Sole | 2025-02-10 | |
| 2024-09-30 | $24,747,191 | 48,983 | Shares | Sole | 2024-11-08 | |
| 2024-06-30 | $23,864,517 | 48,983 | Shares | Sole | 2024-08-06 | |
| 2024-03-31 | $26,447,391 | 48,983 | Shares | Sole | 2024-05-09 | |
| 2023-12-31 | $27,188,014 | 48,983 | Shares | Sole | 2024-02-12 | |
| 2023-09-30 | $21,418,796 | 48,983 | Shares | Sole | 2023-11-08 | |
| 2023-06-30 | $24,600,732 | 48,983 | Shares | Sole | 2023-07-31 | |
| 2023-03-31 | $24,495,418 | 48,983 | Shares | Sole | 2023-05-01 | |
| 2022-12-31 | $25,454,664 | 62,395 | Shares | Sole | 2023-01-30 | |
| 2022-09-30 | $20,328,291 | 62,395 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $21,883,798 | 62,395 | Shares | Sole | 2022-08-05 | |
| 2022-03-31 | $34,133,808 | 62,395 | Shares | Sole | 2022-05-11 | |
| 2021-12-31 | $41,084,611 | 62,395 | Shares | Sole | 2022-02-11 | |
| 2021-09-30 | $38,803,450 | 62,395 | Shares | Sole | 2021-11-16 | |
| 2021-06-30 | $45,009,305 | 71,268 | Shares | Sole | 2021-08-05 | |
| 2021-03-31 | $34,872,145 | 71,268 | Shares | Sole | 2021-05-06 | |
| 2020-12-31 | $35,624,735 | 71,268 | Shares | Sole | 2021-02-10 | |
| 2020-09-30 | $28,016,163 | 71,268 | Shares | Sole | 2020-11-13 | |
| 2020-06-30 | $24,068,994 | 72,901 | Shares | Sole | 2020-08-12 | |
| 2020-03-31 | $17,659,538 | 72,901 | Shares | Sole | 2020-05-01 | |
| No filing history on record for this holder in this stock. | ||||||