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 | $97.1M | Sell |
197,600
-154,100
| -44% | -$83.6M | 0.02% | 828 |
|
|
2025
Q4 | $204M | Buy |
351,700
+59,100
| +20% | +$33.4M | 0.03% | 479 |
|
|
2025
Q3 | $142M | Sell |
292,600
-7,000
| -2% | -$3.26M | 0.02% | 650 |
|
|
2025
Q2 | $121M | Buy |
299,600
+163,700
| +120% | +$68.4M | 0.02% | 644 |
|
|
2025
Q1 | $67.6M | Sell |
135,900
-106,000
| -44% | -$57.4M | 0.01% | 925 |
|
|
2024
Q4 | $126M | Sell |
241,900
-18,200
| -7% | -$10M | 0.02% | 613 |
|
|
2024
Q3 | $161M | Buy |
260,100
+24,500
| +10% | +$14.5M | 0.03% | 456 |
|
|
2024
Q2 | $130M | Sell |
235,600
-109,200
| -32% | -$62.6M | 0.03% | 541 |
|
|
2024
Q1 | $200M | Buy |
344,800
+64,100
| +23% | +$36M | 0.04% | 368 |
|
|
2023
Q4 | $149M | Sell |
280,700
-58,300
| -17% | -$28.2M | 0.03% | 475 |
|
|
2023
Q3 | $172M | Sell |
339,000
-79,500
| -19% | -$42.4M | 0.04% | 368 |
|
|
2023
Q2 | $218M | Buy |
418,500
+63,000
| +18% | +$34M | 0.05% | 291 |
|
|
2023
Q1 | $205M | Sell |
355,500
-61,700
| -15% | -$34.8M | 0.05% | 317 |
|
|
2022
Q4 | $230M | Sell |
417,200
-32,700
| -7% | -$17.3M | 0.05% | 291 |
|
|
2022
Q3 | $228M | Buy |
449,900
+49,700
| +12% | +$27.8M | 0.05% | 265 |
|
|
2022
Q2 | $217M | Sell |
400,200
-263,800
| -40% | -$145M | 0.06% | 255 |
|
|
2022
Q1 | $392M | Buy |
664,000
+274,100
| +70% | +$157M | 0.08% | 152 |
|
|
2021
Q4 | $260M | Sell |
389,900
-31,700
| -8% | -$19.8M | 0.05% | 257 |
|
|
2021
Q3 | $241M | Buy |
421,600
+192,400
| +84% | +$106M | 0.05% | 283 |
|
|
2021
Q2 | $116M | Buy |
229,200
+56,500
| +33% | +$26.7M | 0.03% | 588 |
|
|
2021
Q1 | $78.8M | Sell |
172,700
-100,700
| -37% | -$48.1M | 0.02% | 717 |
|
|
2020
Q4 | $127M | Buy |
273,400
+113,600
| +71% | +$53.3M | 0.03% | 429 |
|
|
2020
Q3 | $70.6M | Sell |
159,800
-36,500
| -19% | -$15.1M | 0.02% | 648 |
|
|
2020
Q2 | $71.1M | Buy |
196,300
+1,300
| +0.7% | +$436K | 0.03% | 583 |
|
|
2020
Q1 | $55.3M | Buy |
195,000
+58,500
| +43% | +$18.4M | 0.02% | 594 |
|
|
2019
Q4 | $44.3M | Sell |
136,500
-52,900
| -28% | -$16M | 0.02% | 841 |
|
|
2019
Q3 | $55.2M | Buy |
189,400
+102,600
| +118% | +$29.4M | 0.03% | 697 |
|
|
2019
Q2 | $25.5M | Sell |
86,800
-16,600
| -16% | -$4.57M | 0.01% | 1200 |
|
|
2019
Q1 | $28.3M | Buy |
103,400
+39,000
| +61% | +$9.71M | 0.01% | 1068 |
|
|
2018
Q4 | $14.4M | Sell |
64,400
-10,600
| -14% | -$2.49M | 0.01% | 1514 |
|
|
2018
Q3 | $18.3M | Sell |
75,000
-22,600
| -23% | -$5.2M | 0.01% | 1474 |
|
|
2018
Q2 | $20.2M | Buy |
97,600
+20,400
| +26% | +$4.33M | 0.01% | 1309 |
|
|
2018
Q1 | $15.9M | Sell |
77,200
-23,100
| -23% | -$4.85M | 0.01% | 1309 |
|
|
2017
Q4 | $19M | Buy |
100,300
+25,000
| +33% | +$4.79M | 0.01% | 1186 |
|
|
2017
Q3 | $14.2M | Buy |
75,300
+7,100
| +10% | +$1.29M | 0.01% | 1310 |
|
|
2017
Q2 | $11.9M | Buy |
68,200
+33,000
| +94% | +$5.54M | 0.01% | 1329 |
|
|
2017
Q1 | $5.41M | Sell |
35,200
-34,400
| -49% | -$5.26M | ﹤0.01% | 1959 |
|
|
2016
Q4 | $9.82M | Sell |
69,600
-14,700
| -17% | -$2.17M | 0.01% | 1375 |
|
|
2016
Q3 | $13.4M | Buy |
84,300
+23,200
| +38% | +$3.58M | 0.01% | 1121 |
|
|
2016
Q2 | $9.03M | Buy |
61,100
+23,300
| +62% | +$3.44M | 0.01% | 1333 |
|
|
2016
Q1 | $5.35M | Sell |
37,800
-17,600
| -32% | -$2.36M | 0.01% | 1696 |
|
|
2015
Q4 | $7.86M | Buy |
55,400
+8,200
| +17% | +$1.09M | 0.01% | 1453 |
|
|
2015
Q3 | $5.77M | Buy |
47,200
+900
| +2% | +$117K | 0.01% | 1807 |
|
|
2015
Q2 | $6.01M | Buy |
46,300
+9,100
| +24% | +$1.19M | 0.01% | 1892 |
|
|
2015
Q1 | $5M | Sell |
37,200
-1,200
| -3% | -$155K | ﹤0.01% | 2032 |
|
|
2014
Q4 | $4.81M | Buy |
38,400
+3,500
| +10% | +$426K | ﹤0.01% | 2017 |
|
|
2014
Q3 | $4.25M | Sell |
34,900
-9,200
| -21% | -$1.12M | ﹤0.01% | 2132 |
|
|
2014
Q2 | $5.2M | Buy |
44,100
+400
| +0.9% | +$47.1K | 0.01% | 1805 |
|
|
2014
Q1 | $5.25M | Sell |
43,700
-44,900
| -51% | -$5.34M | 0.01% | 1749 |
|
|
2013
Q4 | $9.87M | Buy |
88,600
+33,500
| +61% | +$3.33M | 0.01% | 1218 |
|
|
2013
Q3 | $5.08M | Sell |
55,100
-8,600
| -14% | -$778K | 0.01% | 1582 |
|
|
2013
Q2 | $5.39M | Buy |
+63,700
| New | +$5.3M | 0.01% | 1502 |
|
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.