賽默飛世爾科技公司
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionKlingenstein Fields & Co Lp
Latest Disclosed Ownership71,998 shares
Latest Disclosed Value $ 35,389,177
Klingenstein Fields & Co Lp reports 1.06% decrease in ownership of TMO / Thermo Fisher Scientific Inc.

On May 12, 2026 - Klingenstein Fields & Co Lp filed a 13F-HR form disclosing ownership of 71,998 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $35,389,177 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 72,766 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -1.06% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-12 2026-03-31 13F THERMO FISHER SCI COMMON 883556102 71,998 -768 -1.06 35,389 -16.07 1.0381
2026-02-13 2025-12-31 13F THERMO FISHER SCI COMMON 883556102 72,766 -401 -0.55 42,164 18.82 1.5815
2025-11-14 2025-09-30 13F THERMO FISHER SCI COMMON 883556102 73,167 -166 -0.23 35,487 19.35 1.3400
2025-07-30 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 73,333 -2,154 -2.85 29,734 -20.84 1.1772
2025-04-28 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 75,487 -433 -0.57 37,562 -4.89 1.5971
2025-01-30 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 75,920 -395 -0.52 39,496 -16.33 1.5919
2024-10-29 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 76,315 135 0.18 47,206 12.06 1.8766
2024-08-01 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 76,180 -2,094 -2.68 42,128 -7.40 1.7454
2024-04-29 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 78,274 -1,828 -2.28 45,494 7.00 1.8893
2024-02-01 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 80,102 -2,046 -2.49 42,517 2.25 1.8953
2023-10-27 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 82,148 -107 -0.13 41,581 -3.11 2.0304
2023-08-01 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 82,255 -771 -0.93 42,917 -10.32 1.9835
2023-04-28 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 83,026 -1,073 -1.28 47,854 3.33 2.3955
2023-02-02 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 84,099 -1,880 -2.19 46,312 6.20 2.4042
2022-10-28 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 85,979 -919 -1.06 43,607 -7.63 2.3980
2022-08-01 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 86,898 583 0.68 47,210 -7.40 2.4550
2022-04-27 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 86,315 -180 -0.21 50,982 -11.66 2.1836
2022-01-31 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 86,495 -1,293 -1.47 57,713 15.07 2.3193
2021-10-26 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 87,788 -954 -1.08 50,155 12.03 2.1392
2021-07-26 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 88,742 -3 -0.00 44,768 10.54 1.8521
2021-04-29 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 88,745 -3,064 -3.34 40,501 -5.29 1.8311
2021-02-02 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 91,809 -1,629 -1.74 42,762 3.65 1.9386
2020-10-30 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 93,438 -2,486 -2.59 41,255 18.70 2.0597
2020-08-03 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 95,924 -98 -0.10 34,757 27.64 1.8989
2020-05-07 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 96,022 -121 -0.13 27,231 -12.82 1.7743
2020-02-04 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 96,143 -2,673 -2.71 31,234 8.52 1.5715
2019-11-01 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 98,816 -1,947 -1.93 28,782 -2.74 1.5195
2019-08-12 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 100,763 -734 -0.72 29,592 6.52 1.5360
2019-04-29 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 101,497 -39,474 -28.00 27,782 -11.94 1.4927
2019-01-22 2018-12-31 13F Thermo Fisher Scientific COM 883556102 140,971 -2,103 -1.47 31,548 -9.66 1.3385
2018-11-01 2018-09-30 13F Thermo Fisher Scientific COM 883556102 143,074 -3,565 -2.43 34,921 14.97 1.2509
2018-07-26 2018-06-30 13F Thermo Fisher Scientific COM 883556102 146,639 296 0.20 30,375 0.53 1.1578
2018-05-01 2018-03-31 13F Thermo Fisher Scientific COM 883556102 146,343 323 0.22 30,214 8.97 1.1556
2018-01-30 2017-12-31 13F Thermo Fisher Scientific COM 883556102 146,020 -995 -0.68 27,726 -0.32 1.0203
2017-11-01 2017-09-30 13F Thermo Fisher Scientific COM 883556102 147,015 -18,228 -11.03 27,815 -3.52 1.0703
2017-07-27 2017-06-30 13F Thermo Fisher Scientific COM 883556102 165,243 512 0.31 28,830 13.94 1.1303
2017-05-01 2017-03-31 13F Thermo Fisher Scientific COM 883556102 164,731 139,893 563.22 25,303 621.91 1.0274
2017-01-26 2016-12-31 13F Thermo Fisher Scientific COM 883556102 24,838 -2,650 -9.64 3,505 -19.83 0.1531
2016-11-02 2016-09-30 13F Thermo Fisher Scientific COM 883556102 27,488 -13,054 -32.20 4,372 -27.01 0.2012
2016-08-01 2016-06-30 13F Thermo Fisher Scientific COM 883556102 40,542 -895 -2.16 5,990 2.10 0.2800
2016-05-02 2016-03-31 13F Thermo Fisher Scientific COM 883556102 41,437 -791 -1.87 5,867 -2.05 0.2934
2016-02-01 2015-12-31 13F Thermo Fisher Scientific COM 883556102 42,228 2,480 6.24 5,990 23.25 0.2969
2015-10-23 2015-09-30 13F Thermo Fisher Scientific COM 883556102 39,748 18,336 85.63 4,860 74.95 0.2405
2015-08-03 2015-06-30 13F Thermo Fisher Scientific COM 883556102 21,412 21,412 2,778 0.1241
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.