PARNASSUS INVESTMENTS, LLC
Position in TMO — Thermo Fisher Scientific Inc.
CIK 948669
San Francisco, CA
Position in TMO
as of Mar 31, 2026
· filed May 12, 2026
Position Value
$739,581,106
-$177,749,086 QoQ
Shares Held
1,504,651
-5.0% QoQ
Ownership
0.405%
of shares outstanding
% of Portfolio
2.22%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2022
17 quarters on record
Voting authority
Sole 96.66726702737046.ToString("F0")%
Shared 0.ToString("F0")%
None 3.3327329726295334.ToString("F0")%
Common Shares in TMO 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. TMO ranks #2 (45.9% 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.
This page
|
1,504,651 | $739,581,106 | |
| 3 | A |
Agilent Technologies, Inc.
|
586,689 | $66,870,812 | |
| 4 | IDXX |
Idexx Laboratories Inc /De
|
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 TMO
Export CSV
17 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $739,581,106 | 1,504,651 | Shares | Sole | 2026-05-12 | |
| 2025-12-31 | $917,330,192 | 1,583,105 | Shares | Sole | 2026-02-12 | |
| 2025-09-30 | $1,015,448,057 | 2,093,621 | Shares | Sole | 2025-10-24 | |
| 2025-06-30 | $877,925,508 | 2,165,258 | Shares | Sole | 2025-08-06 | |
| 2025-03-31 | $706,806,465 | 1,420,431 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $734,022,160 | 1,410,957 | Shares | Sole | 2025-02-10 | |
| 2024-09-30 | $697,666,545 | 1,127,870 | Shares | Sole | 2024-11-08 | |
| 2024-06-30 | $643,529,971 | 1,163,707 | Shares | Sole | 2024-08-06 | |
| 2024-03-31 | $797,561,354 | 1,372,243 | Shares | Sole | 2024-05-09 | |
| 2023-12-31 | $735,825,684 | 1,386,284 | Shares | Sole | 2024-02-12 | |
| 2023-09-30 | $629,132,865 | 1,242,928 | Shares | Sole | 2023-11-08 | |
| 2023-06-30 | $660,807,853 | 1,266,522 | Shares | Sole | 2023-07-31 | |
| 2023-03-31 | $724,116,109 | 1,256,339 | Shares | Sole | 2023-05-01 | |
| 2022-12-31 | $618,048,748 | 1,122,317 | Shares | Sole | 2023-01-30 | |
| 2022-09-30 | $570,626,789 | 1,125,075 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $522,771,180 | 962,250 | Shares | Sole | 2022-08-05 | |
| 2022-03-31 | $552,948,219 | 936,169 | Shares | Sole | 2022-05-11 | |
| No filing history on record for this holder in this stock. | ||||||