Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionGeode Capital Management, Llc
Latest Disclosed Ownership8,407,891 shares
Latest Disclosed Value $ 4,114,007,288
Geode Capital Management, Llc reports 2.58% increase in ownership of TMO / Thermo Fisher Scientific Inc.

On May 15, 2026 - Geode Capital Management, Llc filed a 13F-HR form disclosing ownership of 8,407,891 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $4,114,007,288 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 8,196,477 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of 2.58% 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 8,407,891 211,414 2.58 4,114,007 -12.99 0.1368
2026-02-09 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,196,477 26,425 0.32 4,728,129 19.89 0.2918
2025-11-12 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,170,052 55,265 0.68 3,943,731 20.45 0.2516
2025-08-08 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,114,787 -12,399 -0.15 3,274,161 -18.74 0.2295
2025-05-13 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,127,186 269,801 3.43 4,029,342 -1.13 0.3168
2025-02-12 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 7,857,385 197,442 2.58 4,075,540 -13.64 0.3158
2024-11-12 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 7,659,943 127,564 1.69 4,719,477 13.67 0.3822
2024-08-09 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 7,532,379 37,188 0.50 4,152,085 -4.40 0.3644
2024-05-13 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 7,495,191 203,298 2.79 4,342,974 12.55 0.4016
2024-02-13 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 7,291,893 173,554 2.44 3,858,668 7.36 0.4037
2023-11-13 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 7,118,339 139,470 2.00 3,594,156 -0.99 0.4281
2023-08-11 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 6,978,869 -6,715 -0.10 3,630,172 -9.61 0.4266
2023-05-15 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 6,985,584 106,233 1.54 4,015,975 106,142.70 0.5215
2023-02-13 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 6,879,351 123,256 1.82 3,781 -99.89 0.5306
2022-11-14 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 6,756,095 115,628 1.74 3,422,209 -4.94 0.5191
2022-08-12 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 6,640,467 99,048 1.51 3,600,121 -6.56 0.5274
2022-05-13 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 6,541,419 137,614 2.15 3,853,027 -9.58 0.4810
2022-02-11 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 6,403,805 214,375 3.46 4,261,136 20.84 0.5132
2021-11-12 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 6,189,430 119,371 1.97 3,526,249 15.51 0.4747
2021-08-13 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 6,070,059 173,240 2.94 3,052,801 13.77 0.4206
2021-05-12 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 5,896,819 93,794 1.62 2,683,200 -0.45 0.4104
2021-02-12 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 5,803,025 193,906 3.46 2,695,296 9.08 0.4524
2020-11-13 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,609,119 73,434 1.33 2,470,921 23.44 0.4841
2020-08-13 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,535,685 76,104 1.39 2,001,650 29.56 0.4282
2020-05-14 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 5,459,581 -81,340 -1.47 1,544,962 -13.98 0.4026
2020-02-20 2019-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 5,540,921 151,622 2.81 1,795,964 14.61 0.3754
2020-02-13 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 5,540,921 151,622 1,795,964 228,879.8646
2019-11-12 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,389,299 89,130 1.68 1,567,085 0.86 0.3657
2019-08-14 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,300,169 10,130 0.19 1,553,713 7.50 0.3760
2019-05-14 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 5,290,039 392,325 8.01 1,445,315 32.11 0.3745
2019-03-06 2018-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 4,897,714 422,625 9.44 1,094,013 0.37 0.3382
2019-02-13 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 4,897,714 422,625 1,094,013
2018-11-13 2018-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 4,475,089 126,552 2.91 1,090,016 21.28 0.3072
2018-08-14 2018-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 4,348,537 219,072 5.31 898,770 5.69 0.2763
2018-05-15 2018-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 4,129,465 212,244 5.42 850,367 14.59 0.2771
2018-02-13 2017-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,917,221 158,961 4.23 742,108 4.59 0.2520
2017-11-14 2017-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,758,260 157,011 4.36 709,569 13.14 0.2619
2017-08-14 2017-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,601,249 38,806 1.09 627,143 14.79 0.2466
2017-06-21 2017-03-31 13F/A-1 THERMO ELECTRON CORP COM COM 883556102 3,562,443 232,624 6.99 546,354 16.44 0.2241
2017-05-12 2017-03-31 13F THERMO ELECTRON CORP COM COM 883556102 3,562,443 546,354
2017-02-14 2016-12-31 13F THERMO ELECTRON CORP COM COM 883556102 3,329,819 134,030 4.19 469,229 -7.53 0.2182
2016-11-10 2016-09-30 13F THERMO ELECTRON CORP COM COM 883556102 3,195,789 140,777 4.61 507,464 12.63 0.2555
2016-08-12 2016-06-30 13F THERMO ELECTRON CORP COM COM 883556102 3,055,012 -65,296 -2.09 450,574 2.20 0.2450
2016-05-13 2016-03-31 13F THERMO ELECTRON CORP COM COM 883556102 3,120,308 40,214 1.31 440,879 1.13 0.2340
2016-02-12 2015-12-31 13F THERMO ELECTRON CORP COM COM 883556102 3,080,094 10,952 0.36 435,972 16.40 0.2485
2015-11-13 2015-09-30 13F THERMO ELECTRON CORP COM COM 883556102 3,069,142 26,537 0.87 374,537 -4.94 0.2272
2015-08-14 2015-06-30 13F THERMO ELECTRON CORP COM COM 883556102 3,042,605 22,784 0.75 394,006 -2.72 0.2249
2015-05-14 2015-03-31 13F THERMO ELECTRON CORP COM COM 883556102 3,019,821 78,900 2.68 405,031 10.07 0.2315
2015-02-12 2014-12-31 13F THERMO ELECTRON CORP COM COM 883556102 2,940,921 117,735 4.17 367,982 7.24 0.2189
2014-11-14 2014-09-30 13F THERMO ELECTRON CORP COM COM 883556102 2,823,186 -24,048 -0.84 343,128 2.19 0.2224
2014-08-13 2014-06-30 13F THERMO ELECTRON CORP COM COM 883556102 2,847,234 -73,065 -2.50 335,770 -4.34 0.2171
2014-05-14 2014-03-31 13F THERMO ELECTRON CORP COM COM 883556102 2,920,299 307,116 11.75 350,991 20.66 0.2354
2014-02-14 2013-12-31 13F THERMO ELECTRON CORP COM COM 883556102 2,613,183 135,857 5.48 290,891 27.46 0.2017
2013-11-14 2013-09-30 13F THERMO ELECTRON CORP COM COM 883556102 2,477,326 101,896 4.29 228,227 13.55 0.1830
2013-08-14 2013-06-30 13F THERMO ELECTRON CORP COM COM 883556102 2,375,430 2,375,430 200,990 0.1767
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.