Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionAqr Capital Management Llc
ManagerCliff Asness
Latest Disclosed Ownership125,682 shares
Latest Disclosed Value $ 61,387,001
Aqr Capital Management Llc reports 13.17% decrease in ownership of TMO / Thermo Fisher Scientific Inc.

On May 15, 2026 - Aqr Capital Management Llc filed a 13F-HR form disclosing ownership of 125,682 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $61,387,001 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 144,752 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -13.17% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 125,682 -19,070 -13.17 61,387 -26.81 0.0052
2026-02-17 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 144,752 -10,856 -6.98 83,877 15.80 0.0440
2025-11-14 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 155,608 46,918 43.17 72,433 64.36 0.0464
2025-08-14 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 108,690 -100,575 -48.06 44,069 -56.95 0.0365
2025-05-15 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 209,265 -11,937 -5.40 102,357 -11.05 0.1054
2025-02-14 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 221,202 9,797 4.63 115,076 -11.04 0.1482
2024-11-14 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 211,405 113,253 115.39 129,350 138.31 0.1786
2024-08-14 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 98,152 15,009 18.05 54,278 12.83 0.0832
2024-05-15 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 83,143 -25,752 -23.65 48,106 -16.77 0.0819
2024-02-14 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 108,895 -48,844 -30.97 57,800 -27.61 0.1088
2023-11-14 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 157,739 -20,937 -11.72 79,843 -14.01 0.1649
2023-08-14 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 178,676 -47,989 -21.17 92,849 -28.13 0.1974
2023-05-15 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 226,665 16,194 7.69 129,183 11.80 0.2836
2023-02-14 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 210,471 -34,081 -13.94 115,546 -6.84 0.2633
2022-11-14 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 244,552 -31,617 -11.45 124,034 -15.83 0.3024
2022-08-15 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 276,169 -434,559 -61.14 147,361 -64.90 0.3330
2022-05-16 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 710,728 -235,464 -24.89 419,791 -33.51 0.7967
2022-02-14 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 946,192 -167,591 -15.05 631,338 -0.79 1.1444
2021-11-15 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,113,783 49,310 4.63 636,338 18.50 1.1797
2021-08-16 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,064,473 -38,546 -3.49 536,995 6.95 0.9291
2021-05-17 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,103,019 302,402 37.77 502,099 35.86 0.8213
2021-02-16 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 800,617 125,124 18.52 369,565 24.60 0.6552
2020-11-16 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 675,493 125,333 22.78 296,595 52.86 0.5013
2020-08-17 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 550,160 -15,058 -2.66 194,036 21.05 0.3139
2020-05-15 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 565,218 -675,845 -54.46 160,295 -60.20 0.2696
2020-02-14 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,241,063 -417,282 -25.16 402,762 -16.53 0.4579
2019-11-14 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,658,345 -483,126 -22.56 482,512 -22.37 0.5683
2019-08-14 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,141,471 598,230 38.76 621,561 48.65 0.6935
2019-05-14 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,543,241 -372,305 -19.44 418,141 -2.46 0.4436
2019-02-14 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,915,546 416,123 27.75 428,680 17.13 0.4967
2018-11-15 2018-09-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 1,499,423 624,602 71.40 365,979 101.96 0.3501
2018-11-14 2018-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 874,821 0 181,210
2018-08-14 2018-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 874,821 427,284 95.47 181,210 96.12 0.1825
2018-05-15 2018-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 447,537 60,971 15.77 92,398 25.88 0.0996
2018-02-14 2017-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 386,566 180,385 87.49 73,401 88.16 0.0770
2017-11-14 2017-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 206,181 22,468 12.23 39,009 21.71 0.0466
2017-08-14 2017-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 183,713 16,760 10.04 32,052 24.99 0.0424
2017-05-15 2017-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 166,953 -3,440 -2.02 25,644 6.66 0.0341
2017-02-14 2016-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 170,393 1,368 0.81 24,042 -10.57 0.0332
2016-11-14 2016-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 169,025 -58,761 -25.80 26,885 -20.12 0.0412
2016-08-15 2016-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 227,786 52,097 29.65 33,658 35.30 0.0594
2016-07-29 2016-03-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 175,689 -72,607 -29.24 24,876 -29.37 0.0447
2016-05-16 2016-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 175,689 24,876
2016-02-16 2015-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 248,296 -31,793 -11.35 35,221 2.84 0.0617
2015-11-16 2015-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 280,089 58,622 26.47 34,249 19.18 0.0684
2015-08-14 2015-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 221,467 88,374 66.40 28,738 60.73 0.0570
2015-05-15 2015-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 133,093 -52,984 -28.47 17,880 -23.31 0.0409
2015-04-22 2014-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 186,077 16,543 9.76 23,314 13.00 0.0488
2015-02-17 2014-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 186,077 23,314
2014-11-14 2014-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 169,534 -79,940 -32.04 20,632 -29.91 0.0567
2014-08-14 2014-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 249,474 -44,000 -14.99 29,438 -16.58 0.0793
2014-05-15 2014-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 293,474 54,400 22.75 35,287 32.55 0.1065
2014-02-14 2013-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 239,074 26,037 12.22 26,621 35.61 0.0795
2013-11-14 2013-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 213,037 -122,971 -36.60 19,631 -30.96 0.0692
2013-08-14 2013-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 336,008 -316,986 -48.54 28,436 -31.72 0.1009
2013-05-29 2012-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 652,994 652,994 41,648 0.1783
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.