ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
Position in TMO — Thermo Fisher Scientific Inc.
CIK 1164508
BOSTON, MA
Position in TMO
as of Mar 31, 2026
· filed May 14, 2026
Position Value
$311,811,394
-$190,868,434 QoQ
Shares Held
634,369
-26.9% QoQ
Ownership
0.171%
of shares outstanding
% of Portfolio
0.18%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
24 quarters on record
Voting authority
Sole 81.18319148634312.ToString("F0")%
Shared 0.ToString("F0")%
None 18.816808513656877.ToString("F0")%
Common Shares in TMO Over Time
Shares Held
Position Value (USD)
Position in Diagnostics & Research
Healthcare · as of Mar 31, 2026ARROWSTREET CAPITAL, LIMITED PARTNERSHIP holds $2,675,072,774 across 18 Diagnostics & Research names. TMO ranks #3 (11.7% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | DHR |
Danaher Corp /De/
|
3,639,630 | $690,073,848 | |
| 2 | IDXX |
Idexx Laboratories Inc /De
|
838,839 | $471,335,245 | |
| 3 | TMO |
Thermo Fisher Scientific Inc.
This page
|
634,369 | $311,811,394 | |
| 4 | NTRA |
Natera, Inc.
|
1,191,732 | $238,334,482 | |
| 5 | MEDP |
Medpace Holdings, Inc.
|
395,769 | $190,044,316 | |
| 6 | MTD |
Mettler Toledo International Inc/
|
134,906 | $170,143,447 | |
| 7 | IQV |
Iqvia Holdings Inc.
|
992,190 | $169,208,082 | |
| 8 | A |
Agilent Technologies, Inc.
|
1,439,782 | $164,106,352 |
All Filings in TMO
Export CSV
24 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $311,811,394 | 634,369 | Shares | Defined | 2026-05-14 | |
| 2025-12-31 | $502,679,828 | 867,512 | Shares | Defined | 2026-02-13 | |
| 2025-09-30 | $614,095,947 | 1,266,125 | Shares | Defined | 2025-11-13 | |
| 2025-06-30 | $490,993,408 | 1,210,954 | Shares | Defined | 2025-08-13 | |
| 2025-03-31 | $326,393,753 | 655,936 | Shares | Defined | 2025-05-14 | |
| 2024-12-31 | $192,113,135 | 369,285 | Shares | Defined | 2025-02-12 | |
| 2024-09-30 | $127,625,218 | 206,323 | Shares | Defined | 2024-11-14 | |
| 2024-06-30 | $16,561,797 | 29,949 | Shares | Defined | 2024-08-14 | |
| 2024-03-31 | $2,099,911 | 3,613 | Shares | Defined | 2024-05-15 | |
| 2023-12-31 | $3,534,530 | 6,659 | Shares | Defined | 2024-02-14 | |
| 2023-09-30 | $143,529,059 | 283,559 | Shares | Defined | 2023-11-14 | |
| 2023-06-30 | $319,845,272 | 613,024 | Shares | Defined | 2023-08-14 | |
| 2023-03-31 | $392,899,325 | 681,679 | Shares | Defined | 2023-05-15 | |
| 2022-12-31 | $361,970,189 | 657,303 | Shares | Defined | 2023-02-14 | |
| 2022-09-30 | $265,254,790 | 522,989 | Shares | Defined | 2022-11-14 | |
| 2022-06-30 | $262,830,171 | 483,784 | Shares | Defined | 2022-08-15 | |
| 2022-03-31 | $246,638,901 | 417,572 | Shares | Defined | 2022-05-13 | |
| 2021-12-31 | $91,901,634 | 137,734 | Shares | Defined | 2022-02-14 | |
| 2021-09-30 | $4,156,425 | 7,275 | Shares | Defined | 2021-11-12 | |
| 2021-06-30 | $30,273,749 | 60,011 | Shares | Defined | 2021-08-13 | |
| 2021-03-31 | $15,743,284 | 34,496 | Shares | Defined | 2021-05-14 | |
| 2020-12-31 | $64,024,721 | 137,457 | Shares | Defined | 2021-02-12 | |
| 2020-09-30 | $4,801,530 | 10,875 | Shares | Defined | 2020-11-12 | |
| 2020-03-31 | $22,761,736 | 80,260 | Shares | Defined | 2020-05-15 | |
| No filing history on record for this holder in this stock. | ||||||