Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionCarderock Capital Management Inc
Latest Disclosed Ownership21,269 shares
Latest Disclosed Value $ 10,454,352
Carderock Capital Management Inc reports 1.20% increase in ownership of TMO / Thermo Fisher Scientific Inc.

On April 10, 2026 - Carderock Capital Management Inc filed a 13F-HR form disclosing ownership of 21,269 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $10,454,352 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 9, 2026 disclosing 21,017 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of 1.20% 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)
2026-04-10 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 21,269 252 1.20 10,454 -14.16 2.5826
2026-01-09 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 21,017 5,662 36.87 12,178 63.53 2.9506
2025-10-17 2025-09-30 13F Thermo Fisher Scientific COM 883556102 15,355 1,396 10.00 7,447 31.60 1.8107
2025-07-10 2025-06-30 13F Thermo Fisher Scientific COM 883556102 13,959 365 2.69 5,660 -16.34 1.4499
2025-05-27 2025-03-31 13F Thermo Fisher Scientific COM 883556102 13,594 1,262 10.23 6,764 5.44 1.7927
2025-01-15 2024-12-31 13F Thermo Fisher Scientific COM 883556102 12,332 -308 -2.44 6,415 -17.95 1.6092
2024-10-16 2024-09-30 13F Thermo Fisher Scientific COM 883556102 12,640 754 6.34 7,819 18.96 1.8459
2024-07-22 2024-06-30 13F Thermo Fisher Scientific COM 883556102 11,886 369 3.20 6,573 -1.81 1.7200
2024-04-23 2024-03-31 13F Thermo Fisher Scientific COM 883556102 11,517 -1,196 -9.41 6,694 -0.80 1.8763
2024-01-23 2023-12-31 13F Thermo Fisher Scientific COM 883556102 12,713 319 2.57 6,748 7.56 1.8633
2023-10-23 2023-09-30 13F Thermo Fisher Scientific COM 883556102 12,394 -934 -7.01 6,273 104,450.00 2.1052
2023-07-25 2023-06-30 13F Thermo Fisher Scientific COM 883556102 13,328 -1,355 -9.23 7 -99.93 2.1562
2023-04-19 2023-03-31 13F Thermo Fisher Scientific COM 883556102 14,683 -1,999 -11.98 8,463 93,922.22 2.9494
2023-01-20 2022-12-31 13F Thermo Fisher Scientific COM 883556102 16,682 -79 -0.47 9 -99.89 3.8098
2022-11-04 2022-09-30 13F/A-1 Thermo Fisher Scientific COM 883556102 16,761 -705 -4.04 8,501 -10.41 4.3386
2022-10-21 2022-09-30 13F Thermo Fisher Scientific COM 883556102 17,466 0 9,489 3.9631
2022-07-21 2022-06-30 13F Thermo Fisher Scientific COM 883556102 17,466 -1,248 -6.67 9,489 -14.15 3.9631
2022-04-28 2022-03-31 13F Thermo Fisher Scientific COM 883556102 18,714 -640 -3.31 11,053 -14.41 3.5694
2022-01-31 2021-12-31 13F Thermo Fisher Scientific COM 883556102 19,354 874 4.73 12,914 22.31 3.1013
2021-10-29 2021-09-30 13F Thermo Fisher Scientific COM 883556102 18,480 -14 -0.08 10,558 13.16 2.9753
2021-07-30 2021-06-30 13F Thermo Fisher Scientific COM 883556102 18,494 60 0.33 9,330 10.90 2.5583
2021-05-07 2021-03-31 13F Thermo Fisher Scientific COM 883556102 18,434 -5,360 -22.53 8,413 -24.09 2.5134
2021-02-05 2020-12-31 13F Thermo Fisher Scientific COM 883556102 23,794 57 0.24 11,083 5.75 3.3452
2020-10-27 2020-09-30 13F Thermo Fisher Scientific COM 883556102 23,737 -732 -2.99 10,480 18.20 3.5402
2020-08-04 2020-06-30 13F Thermo Fisher Scientific COM 883556102 24,469 -816 -3.23 8,866 23.64 3.2682
2020-05-11 2020-03-31 13F Thermo Fisher Scientific COM 883556102 25,285 -316 -1.23 7,171 -13.78 3.2886
2020-02-04 2019-12-31 13F Thermo Fisher Scientific COM 883556102 25,601 -1,327 -4.93 8,317 6.04 2.7908
2019-10-23 2019-09-30 13F Thermo Fisher Scientific COM 883556102 26,928 -626 -2.27 7,843 -3.08 2.8866
2019-07-15 2019-06-30 13F Thermo Fisher Scientific COM 883556102 27,554 -349 -1.25 8,092 5.94 3.0546
2019-04-23 2019-03-31 13F Thermo Fisher Scientific COM 883556102 27,903 203 0.73 7,638 23.21 3.1156
2019-02-14 2018-12-31 13F Thermo Fisher Scientific COM 883556102 27,700 -689 -2.43 6,199 -10.54 3.2018
2018-11-13 2018-09-30 13F Thermo Fisher Scientific COM 883556102 28,389 39 0.14 6,929 18.00 2.7333
2018-07-16 2018-06-30 13F Thermo Fisher Scientific COM 883556102 28,350 -107 -0.38 5,872 -0.05 2.5335
2018-04-27 2018-03-31 13F Thermo Fisher Scientific COM 883556102 28,457 -251 -0.87 5,875 7.78 2.5937
2018-01-25 2017-12-31 13F Thermo Fisher Scientific COM 883556102 28,708 -4,625 -13.88 5,451 -13.57 2.4021
2017-11-15 2017-09-30 13F Thermo Fisher Scientific COM 883556102 33,333 4,143 14.19 6,307 23.84 2.8450
2017-08-09 2017-06-30 13F Thermo Fisher Scientific COM 883556102 29,190 200 0.69 5,093 14.37 2.2976
2017-04-17 2017-03-31 13F Thermo Fisher Scientific COM 883556102 28,990 -1,316 -4.34 4,453 4.14 2.0601
2017-02-08 2016-12-31 13F Thermo Fisher Scientific COM 883556102 30,306 363 1.21 4,276 -10.22 2.1327
2016-11-02 2016-09-30 13F Thermo Fisher Scientific COM 883556102 29,943 381 1.29 4,763 9.04 2.3849
2016-08-15 2016-06-30 13F Thermo Fisher Scientific COM 883556102 29,562 -545 -1.81 4,368 2.46 2.3117
2016-05-03 2016-03-31 13F Thermo Fisher Scientific COM 883556102 30,107 43 0.14 4,263 -0.05 2.1882
2016-02-11 2015-12-31 13F Thermo Fisher Scientific COM 883556102 30,064 1,141 3.94 4,265 20.58 2.2200
2015-11-04 2015-09-30 13F Thermo Fisher Scientific COM 883556102 28,923 170 0.59 3,537 -5.20 1.9723
2015-07-31 2015-06-30 13F Thermo Fisher Scientific COM 883556102 28,753 119 0.42 3,731 -3.02 1.8730
2015-04-28 2015-03-31 13F Thermo Fisher Scientific COM 883556102 28,634 68 0.24 3,847 7.49 1.8632
2015-02-11 2014-12-31 13F Thermo Fisher Scientific COM 883556102 28,566 29 0.10 3,579 3.05 1.7623
2014-11-06 2014-09-30 13F Thermo Fisher Scientific COM 883556102 28,537 7,432 35.21 3,473 39.48 1.7825
2014-08-06 2014-06-30 13F Thermo Fisher Scientific COM 883556102 21,105 20,377 2,799.04 2,490 8,200.00 1.2988
2014-05-09 2014-03-31 13F Janus Fd Cl T ISHARES 471023101 728 -18,391 -96.19 30 -98.59 0.0152
2014-05-09 2014-03-31 13F Thermo Fisher Scientific COM 883556102 21,027 1,908 2,528 1.2848
2014-02-11 2013-12-31 13F Thermo Fisher Scientific COM 883556102 19,119 -5,730 -23.06 2,129 -7.03 1.1163
2013-11-14 2013-09-30 13F Thermo Fisher Scientific COM 883556102 24,849 316 1.29 2,290 10.31 1.3276
2013-08-02 2013-06-30 13F Thermo Fisher Scientific COM 883556102 24,533 24,533 2,076 1.2262
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.