Citadel Advisors’s Thermo Fisher Scientific TMO Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $144M | Buy |
293,600
+6,200
| +2% | +$3.36M | 0.02% | 607 |
|
|
2025
Q4 | $167M | Sell |
287,400
-57,200
| -17% | -$32.3M | 0.03% | 572 |
|
|
2025
Q3 | $167M | Sell |
344,600
-15,000
| -4% | -$6.98M | 0.03% | 556 |
|
|
2025
Q2 | $146M | Buy |
359,600
+75,000
| +26% | +$31.4M | 0.03% | 536 |
|
|
2025
Q1 | $142M | Buy |
284,600
+20,600
| +8% | +$11.2M | 0.03% | 506 |
|
|
2024
Q4 | $137M | Sell |
264,000
-47,300
| -15% | -$26M | 0.02% | 563 |
|
|
2024
Q3 | $193M | Buy |
311,300
+54,900
| +21% | +$32.5M | 0.04% | 376 |
|
|
2024
Q2 | $142M | Buy |
256,400
+18,300
| +8% | +$10.5M | 0.03% | 496 |
|
|
2024
Q1 | $138M | Sell |
238,100
-200,800
| -46% | -$113M | 0.03% | 532 |
|
|
2023
Q4 | $233M | Sell |
438,900
-31,400
| -7% | -$15.2M | 0.05% | 293 |
|
|
2023
Q3 | $238M | Sell |
470,300
-91,100
| -16% | -$48.5M | 0.05% | 261 |
|
|
2023
Q2 | $293M | Buy |
561,400
+137,600
| +32% | +$74.3M | 0.06% | 182 |
|
|
2023
Q1 | $244M | Buy |
423,800
+2,000
| +0.5% | +$1.13M | 0.05% | 247 |
|
|
2022
Q4 | $232M | Sell |
421,800
-406,200
| -49% | -$215M | 0.05% | 286 |
|
|
2022
Q3 | $420M | Buy |
828,000
+480,100
| +138% | +$269M | 0.1% | 120 |
|
|
2022
Q2 | $189M | Sell |
347,900
-32,200
| -8% | -$17.7M | 0.05% | 292 |
|
|
2022
Q1 | $225M | Sell |
380,100
-39,700
| -9% | -$22.8M | 0.05% | 301 |
|
|
2021
Q4 | $280M | Sell |
419,800
-2,800
| -0.7% | -$1.75M | 0.06% | 232 |
|
|
2021
Q3 | $241M | Buy |
422,600
+126,300
| +43% | +$69.3M | 0.05% | 282 |
|
|
2021
Q2 | $149M | Buy |
296,300
+149,300
| +102% | +$70.4M | 0.03% | 465 |
|
|
2021
Q1 | $67.1M | Sell |
147,000
-233,200
| -61% | -$111M | 0.02% | 813 |
|
|
2020
Q4 | $177M | Buy |
380,200
+155,000
| +69% | +$72.7M | 0.05% | 301 |
|
|
2020
Q3 | $99.4M | Buy |
225,200
+54,600
| +32% | +$22.6M | 0.03% | 469 |
|
|
2020
Q2 | $61.8M | Sell |
170,600
-27,400
| -14% | -$9.18M | 0.02% | 665 |
|
|
2020
Q1 | $56.2M | Buy |
198,000
+1,600
| +0.8% | +$505K | 0.03% | 588 |
|
|
2019
Q4 | $63.8M | Buy |
196,400
+7,600
| +4% | +$2.3M | 0.03% | 639 |
|
|
2019
Q3 | $55M | Buy |
188,800
+800
| +0.4% | +$229K | 0.03% | 700 |
|
|
2019
Q2 | $55.2M | Buy |
188,000
+88,800
| +90% | +$24.5M | 0.03% | 673 |
|
|
2019
Q1 | $27.2M | Sell |
99,200
-28,800
| -23% | -$7.17M | 0.01% | 1088 |
|
|
2018
Q4 | $28.6M | Sell |
128,000
-12,000
| -9% | -$2.82M | 0.02% | 961 |
|
|
2018
Q3 | $34.2M | Buy |
140,000
+66,900
| +92% | +$15.4M | 0.02% | 990 |
|
|
2018
Q2 | $15.1M | Sell |
73,100
-12,800
| -15% | -$2.72M | 0.01% | 1556 |
|
|
2018
Q1 | $17.7M | Buy |
85,900
+15,900
| +23% | +$3.34M | 0.01% | 1231 |
|
|
2017
Q4 | $13.3M | Sell |
70,000
-4,300
| -6% | -$824K | 0.01% | 1451 |
|
|
2017
Q3 | $14.1M | Buy |
74,300
+2,600
| +4% | +$471K | 0.01% | 1319 |
|
|
2017
Q2 | $12.5M | Buy |
71,700
+700
| +1% | +$118K | 0.01% | 1286 |
|
|
2017
Q1 | $10.9M | Sell |
71,000
-9,300
| -12% | -$1.42M | 0.01% | 1376 |
|
|
2016
Q4 | $11.3M | Sell |
80,300
-21,300
| -21% | -$3.14M | 0.01% | 1262 |
|
|
2016
Q3 | $16.2M | Buy |
101,600
+32,900
| +48% | +$5.07M | 0.02% | 1001 |
|
|
2016
Q2 | $10.2M | Sell |
68,700
-30,700
| -31% | -$4.53M | 0.01% | 1237 |
|
|
2016
Q1 | $14.1M | Buy |
99,400
+6,500
| +7% | +$871K | 0.02% | 965 |
|
|
2015
Q4 | $13.2M | Buy |
92,900
+34,800
| +60% | +$4.64M | 0.01% | 1081 |
|
|
2015
Q3 | $7.1M | Sell |
58,100
-17,000
| -23% | -$2.21M | 0.01% | 1599 |
|
|
2015
Q2 | $9.74M | Buy |
75,100
+14,800
| +25% | +$1.93M | 0.01% | 1495 |
|
|
2015
Q1 | $8.1M | Buy |
60,300
+16,700
| +38% | +$2.15M | 0.01% | 1622 |
|
|
2014
Q4 | $5.46M | Sell |
43,600
-16,500
| -27% | -$2.01M | 0.01% | 1900 |
|
|
2014
Q3 | $7.31M | Buy |
60,100
+24,900
| +71% | +$3.03M | 0.01% | 1640 |
|
|
2014
Q2 | $4.15M | Sell |
35,200
-18,400
| -34% | -$2.17M | ﹤0.01% | 2004 |
|
|
2014
Q1 | $6.45M | Buy |
53,600
+36,200
| +208% | +$4.3M | 0.01% | 1565 |
|
|
2013
Q4 | $1.94M | Sell |
17,400
-14,700
| -46% | -$1.46M | ﹤0.01% | 2585 |
|
|
2013
Q3 | $2.96M | Sell |
32,100
-15,600
| -33% | -$1.41M | ﹤0.01% | 2035 |
|
|
2013
Q2 | $4.04M | Buy |
+47,700
| New | +$3.97M | 0.01% | 1767 |
|
Other funds holding TMO
VCM
Citadel Advisors's TMO Position: Q1 2026 in Review
Citadel Advisors increased its Thermo Fisher Scientific (TMO) stake by 25% in Q1 2026, buying an estimated $94.5M and bringing the position to 864,489 shares worth $425M. The position accounts for 0.07% of the portfolio, ranked #216.
Citadel Advisors first reported a position in TMO in Q2 2013 and has held it in 50 quarters since. The position peaked at $543M in Q2 2024. 2,587 funds tracked by Wall St. Rank hold TMO as of Q1 2026.
- Citadel Advisors held 864,489 shares of Thermo Fisher Scientific worth $425M as of Q1 2026.
- Citadel Advisors bought 174,084 Thermo Fisher Scientific shares in Q1 2026, an estimated $94.5M.
- Thermo Fisher Scientific made up 0.07% of Citadel Advisors's portfolio in Q1 2026, its #216 holding.
- Citadel Advisors first reported a position in Thermo Fisher Scientific in Q2 2013 and has held it in 50 quarters since.
- Citadel Advisors's Thermo Fisher Scientific position peaked at $543M in Q2 2024.
- 2,587 funds tracked by Wall St. Rank held Thermo Fisher Scientific as of Q1 2026.
Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.