RENAISSANCE TECHNOLOGIES LLC
Position in TMO — Thermo Fisher Scientific Inc.
CIK 1037389
NEW YORK, NY
Position in TMO
as of Mar 31, 2026
· filed May 14, 2026
Position Value
$68,304,974
-$117,780,893 QoQ
Shares Held
138,964
-69.7% QoQ
Ownership
0.038%
of shares outstanding
% of Portfolio
0.11%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
13 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in TMO Over Time
Shares Held
Position Value (USD)
Position in Diagnostics & Research
Healthcare · as of Jun 30, 2026RENAISSANCE TECHNOLOGIES LLC holds $627,204,743 across 15 Diagnostics & Research names.
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | MEDP |
Medpace Holdings, Inc.
|
415,588 | $220,091,248 | |
| 2 | ILMN |
Illumina, Inc.
|
826,642 | $145,348,462 | |
| 3 | DHR |
Danaher Corp /De/
|
760,636 | $144,885,945 | |
| 4 | IDXX |
Idexx Laboratories Inc /De
|
109,784 | $57,794,688 | |
| 5 | CDNA |
CareDx, Inc.
|
1,242,959 | $35,424,331 | |
| 6 | BLLN |
BillionToOne, Inc.
|
96,600 | $11,590,068 | |
| 7 | CSTL |
Castle Biosciences Inc
|
371,200 | $8,853,120 | |
| 8 | ICLR |
Icon PLC
|
4,500 | $781,695 |
All Filings in TMO
Export CSV
13 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $68,304,974 | 138,964 | Shares | Sole | 2026-05-14 | |
| 2025-06-30 | $186,085,867 | 458,950 | Shares | Sole | 2025-08-13 | |
| 2025-03-31 | $77,249,414 | 155,244 | Shares | Sole | 2025-05-14 | |
| 2024-12-31 | $94,340,589 | 181,344 | Shares | Sole | 2025-02-13 | |
| 2024-09-30 | $30,279,620 | 48,951 | Shares | Sole | 2024-11-13 | |
| 2024-06-30 | $130,424,497 | 235,849 | Shares | Sole | 2024-08-09 | |
| 2023-06-30 | $171,418,875 | 328,546 | Shares | Sole | 2023-08-11 | |
| 2022-03-31 | $18,841,735 | 31,900 | Shares | Sole | 2022-05-13 | |
| 2021-06-30 | $30,946,207 | 61,344 | Shares | Sole | 2021-08-13 | |
| 2021-03-31 | $147,202,630 | 322,544 | Shares | Sole | 2021-05-13 | |
| 2020-12-31 | $32,997,718 | 70,844 | Shares | Sole | 2021-02-10 | |
| 2020-06-30 | $69,539,205 | 191,917 | Shares | Sole | 2020-08-13 | |
| 2020-03-31 | $35,851,861 | 126,417 | Shares | Sole | 2020-05-14 | |
| No filing history on record for this holder in this stock. | ||||||