Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionNinety One UK Ltd
Latest Disclosed Ownership637,262 shares
Latest Disclosed Value $ 313,233,367
Ninety One UK Ltd reports 28.59% decrease in ownership of TMO / Thermo Fisher Scientific Inc.

On April 24, 2026 - Ninety One UK Ltd filed a 13F-HR form disclosing ownership of 637,262 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $313,233,367 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 27, 2026 disclosing 892,461 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -28.59% 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)
2026-04-24 2026-03-31 13F Thermo Fisher Scientific Common Stock 883556102 637,262 -255,199 -28.59 313,233 -39.43 0.7263
2026-01-27 2025-12-31 13F Thermo Fisher Scientific Common Stock 883556102 892,461 56,862 6.80 517,137 27.60 1.1087
2025-11-13 2025-09-30 13F/A-1 Thermo Fisher Scientific Common Stock 883556102 835,599 29,806 3.70 405,282 24.05 0.8752
2025-10-21 2025-09-30 13F Thermo Fisher Scientific Common Stock 883556102 835,599 29,806 405,282 0.8917
2025-07-18 2025-06-30 13F Thermo Fisher Scientific Common Stock 883556102 805,793 236,748 41.60 326,717 15.38 0.7667
2025-04-30 2025-03-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 569,045 61,655 12.15 283,157 7.27 0.7878
2025-01-27 2024-12-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 507,390 -15,987 -3.05 263,960 -18.47 0.7062
2024-11-12 2024-09-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 523,377 16,602 3.28 323,745 15.52 0.8641
2024-07-22 2024-06-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 506,775 -32,842 -6.09 280,247 -10.64 0.7738
2024-04-25 2024-03-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 539,617 10,020 1.89 313,631 11.57 0.8807
2024-01-31 2023-12-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 529,597 763 0.14 281,105 5.02 0.8364
2023-10-10 2023-09-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 528,834 -240,735 -31.28 267,680 -33.33 0.8466
2023-07-19 2023-06-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 769,569 7,940 1.04 401,523 -8.53 1.1717
2023-04-28 2023-03-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 761,629 -74,945 -8.96 438,980 -4.71 1.3675
2023-02-07 2022-12-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 836,574 82,385 10.92 460,693 20.44 1.4770
2022-11-14 2022-09-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 754,189 -86,481 -10.29 382,517 -16.25 1.2617
2022-08-15 2022-06-30 13F THERMO FIER SCIENTIFIC Common Stock 883556102 840,670 324,943 63.01 456,719 49.93 1.3580
2022-05-26 2022-03-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 515,727 -13,090 -2.48 304,614 -13.67 0.7759
2022-02-11 2021-12-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 528,817 -26,633 -4.79 352,848 11.19 0.8375
2021-11-02 2021-09-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 555,450 23,613 4.44 317,345 18.28 0.8103
2021-08-12 2021-06-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 531,837 10,769 2.07 268,296 12.82 0.6952
2021-05-07 2021-03-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 521,068 -329,519 -38.74 237,805 -39.98 0.6760
2021-02-05 2020-12-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 850,587 24,403 2.95 396,186 8.61 1.2186
2020-11-12 2020-09-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 826,184 900 0.11 364,777 21.99 1.3192
2020-09-04 2020-06-30 13F/A-1 THERMO FISHER SCIENTIFIC Common Stock 883556102 825,284 -46,501 -5.33 299,033 20.95 1.0595
2020-08-14 2020-06-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,404,194 532,409 456,181 1,513,018.7720
2020-05-12 2020-03-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 871,785 -532,409 -37.92 247,238 -45.80 1.0400
2020-02-07 2019-12-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,404,194 -60,362 -4.12 456,181 6.94 1.5130
2019-11-14 2019-09-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,464,556 -4,216 -0.29 426,581 -1.11 1.6604
2019-07-30 2019-06-30 13F THERMO FIER SCIENTIFIC Common Stock 883556102 1,468,772 5,477 0.37 431,349 7.69 1.6414
2019-04-24 2019-03-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,463,295 -181,109 -11.01 400,533 8.84 1.5868
2019-02-08 2018-12-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,644,404 -14,000 -0.84 368,001 -9.09 1.5869
2018-11-13 2018-09-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,658,404 194,923 13.32 404,783 33.53 1.5102
2018-08-10 2018-06-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,463,481 75,675 5.45 303,145 5.80 1.5060
2018-05-14 2018-03-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,387,806 -750,446 -35.10 286,526 -29.43 1.5349
2018-02-13 2017-12-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 2,138,252 -35,129 -1.62 406,011 -1.26 1.6683
2017-11-13 2017-09-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 2,173,381 475,970 28.04 411,204 38.85 1.8053
2017-08-11 2017-06-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,697,411 463,245 37.54 296,147 56.22 1.4103
2017-05-12 2017-03-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,234,166 -636 -0.05 189,568 8.80 0.9363
2017-02-10 2016-12-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,234,802 102,537 9.06 174,231 -3.26 0.9100
2016-11-14 2016-09-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,132,265 838 0.07 180,098 7.73 0.8774
2016-08-12 2016-06-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,131,427 9,404 0.84 167,180 5.23 0.8649
2016-05-12 2016-03-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,122,023 -612,494 -35.31 158,867 -35.43 0.8592
2016-02-16 2015-12-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,734,517 35,989 2.12 246,041 18.46 1.4043
2015-10-30 2015-09-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,698,528 -20,837 -1.21 207,696 -6.91 1.3031
2015-08-11 2015-06-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,719,365 -7,744 -0.45 223,105 -3.84 1.2725
2015-05-14 2015-03-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,727,109 91,402 5.59 232,020 13.22 1.3560
2015-02-13 2014-12-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,635,707 115,575 7.60 204,937 10.78 1.2522
2014-11-10 2014-09-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,520,132 -2,386 -0.16 185,000 2.97 1.0897
2014-08-13 2014-06-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,522,518 114,246 8.11 179,657 6.10 1.0425
2014-05-12 2014-03-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,408,272 -20,853 -1.46 169,331 6.41 1.2898
2014-02-11 2013-12-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,429,125 6,359 0.45 159,133 21.38 1.1101
2013-11-08 2013-09-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,422,766 -192,339 -11.91 131,108 -4.08 0.9643
2013-08-12 2013-06-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 1,615,105 1,615,105 136,687 1.0476
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.