Citadel Advisors (Ken Griffin) — TMO Trade History
Quarter-by-quarter changes in the THERMO FISHER SCIENTIFIC INC position · CUSIP 883556102
Currently held · 4.5 YearsFirst seen: 2015 Q4
| Quarter | Filed | Activity | Shares | Δ Shares | Δ % | Value | % Port. |
|---|---|---|---|---|---|---|---|
| 2026 Q2 | 2026-09-02 | Reduce | 574,992 | -289,497 | -33.5% | $288.3M | 0.03% |
| 2026 Q1 | 2026-05-15 | Add | 864,489 | 174,084 | +25.2% | $424.9M | 0.07% |
| 2025 Q4 | 2026-02-17 | Add | 690,405 | 340,704 | +97.4% | $400.1M | 0.06% |
| 2025 Q3 | 2025-11-14 | Reduce | 349,701 | -747,122 | -68.1% | $169.6M | 0.03% |
| 2025 Q2 | 2025-08-14 | Add | 1,096,823 | 976,250 | +809.7% | $444.7M | 0.08% |
| 2025 Q1 | 2025-05-15 | Reduce | 120,573 | -219,367 | -64.5% | $60.0M | 0.01% |
| 2024 Q4 | 2025-02-14 | Add | 339,940 | 173,754 | +104.6% | $176.8M | 0.03% |
| 2024 Q3 | 2024-11-14 | Reduce | 166,186 | -816,508 | -83.1% | $102.8M | 0.02% |
| 2024 Q2 | 2024-08-14 | Add | 982,694 | 882,024 | +876.2% | $543.4M | 0.11% |
| 2024 Q1 | 2024-05-15 | Reduce | 100,670 | -428,205 | -81.0% | $58.5M | 0.01% |
| 2023 Q4 | 2024-02-14 | Add | 528,875 | 281,915 | +114.2% | $280.7M | 0.06% |
| 2023 Q3 | 2023-11-14 | Add | 246,960 | 121,162 | +96.3% | $125.0M | 0.03% |
| 2023 Q2 | 2023-08-14 | Reduce | 125,798 | -111,917 | -47.1% | $65.6M | 0.01% |
| 2023 Q1 | 2023-05-15 | Add | 237,715 | 86,060 | +56.7% | $137.0M | 0.03% |
| 2022 Q4 | 2023-02-14 | Add | 151,655 | 120,973 | +394.3% | $83.5M | 0.02% |
| 2022 Q3 | 2022-11-14 | Reduce | 30,682 | -242,002 | -88.7% | $15.6M | 0.00% |
| 2022 Q2 | 2022-08-15 | Add | 272,684 | 241,031 | +761.5% | $148.1M | 0.04% |
| 2022 Q1 | 2022-05-16 | New | 31,653 | 31,653 | — | $18.7M | 0.00% |
| 2021 Q3 | 2022-03-11 | Sold out | — | -23,281 | -100.0% | — | — |
| 2021 Q4 | 2022-02-14 | Reduce | 23,281 | -358,431 | -93.9% | $15.5M | 0.00% |
| 2021 Q2 | 2021-08-16 | Add | 381,712 | 155,110 | +68.5% | $192.6M | 0.04% |
| 2021 Q1 | 2021-05-21 | Add | 226,602 | 124,572 | +122.1% | $103.4M | 0.03% |
| 2020 Q4 | 2021-02-16 | Add | 102,030 | 75,824 | +289.3% | $47.5M | 0.01% |
| 2020 Q3 | 2020-11-16 | Reduce | 26,206 | -12,260 | -31.9% | $11.6M | 0.00% |
| 2020 Q2 | 2020-08-14 | Reduce | 38,466 | -350,677 | -90.1% | $13.9M | 0.01% |
| 2020 Q1 | 2020-05-15 | Add | 389,143 | 382,268 | +5560.3% | $110.4M | 0.05% |
| 2019 Q4 | 2020-02-14 | New | 6,875 | 6,875 | — | $2.2M | 0.00% |
| 2019 Q2 | 2020-02-14 | — | — | — | — | — | — |
| 2018 Q4 | 2019-11-14 | Sold out | — | -16,810 | -100.0% | — | — |
| 2019 Q3 | 2019-11-14 | New | 16,810 | 16,810 | — | $4.9M | 0.00% |
| 2018 Q2 | 2019-08-14 | — | — | — | — | — | — |
| 2018 Q3 | 2019-05-15 | Sold out | — | -729,227 | -100.0% | — | — |
| 2019 Q1 | 2019-05-15 | New | 729,227 | 729,227 | — | $199.6M | 0.10% |
| 2018 Q1 | 2019-02-14 | Sold out | — | -249,101 | -100.0% | — | — |
| 2017 Q4 | 2018-02-09 | Reduce | 249,101 | -595,354 | -70.5% | $47.3M | 0.03% |
| 2017 Q3 | 2017-11-09 | Add | 844,455 | 700,283 | +485.7% | $159.8M | 0.12% |
| 2017 Q2 | 2017-08-11 | Reduce | 144,172 | -77,948 | -35.1% | $25.2M | 0.02% |
| 2017 Q1 | 2017-05-12 | Reduce | 222,120 | -420,555 | -65.4% | $34.1M | 0.03% |
| 2016 Q4 | 2017-02-10 | Reduce | 642,675 | -137,325 | -17.6% | $90.7M | 0.09% |
| 2015 Q4 | 2017-01-31 | New | 780,000 | 780,000 | — | $110.6M | 0.12% |
Share counts are split-adjusted. Time held counts consecutive quarters ending with the latest filing; more than ten years shows as ">10 Years".
13F data shows quarter-end positions, is delayed by up to 45 days and covers only long positions in US-listed securities; short positions, most derivatives and non-US assets are not reported.