Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionSecurity National Bank
Latest Disclosed Ownership11,890 shares
Latest Disclosed Value $ 5,844,292
Security National Bank reports 1.53% increase in ownership of TMO / Thermo Fisher Scientific Inc.

On April 16, 2026 - Security National Bank filed a 13F-HR form disclosing ownership of 11,890 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $5,844,292 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 11,711 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of 1.53% 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)
2026-04-16 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 11,890 179 1.53 5,844 -13.87 0.8511
2026-02-05 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 11,711 409 3.62 6,786 23.79 0.9729
2025-10-20 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 11,302 1,239 12.31 5,482 34.34 0.8396
2025-07-10 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 10,063 238 2.42 4,080 -16.53 0.7063
2025-04-23 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 9,825 -83 -0.84 4,889 -5.16 0.9234
2025-02-10 2024-12-31 13F Thermo Fisher Scientific COM 883556102 9,908 -16 -0.16 5,154 -16.03 0.7354
2024-10-07 2024-09-30 13F Thermo Fisher Scientific COM 883556102 9,924 38 0.38 6,139 12.29 0.8341
2024-07-22 2024-06-30 13F Thermo Fisher Scientific COM 883556102 9,886 -18 -0.18 5,467 -5.04 0.7939
2024-04-15 2024-03-31 13F Thermo Fisher Scientific COM 883556102 9,904 -77 -0.77 5,756 8.67 0.8714
2024-02-13 2023-12-31 13F Thermo Fisher Scientific COM 883556102 9,981 263 2.71 5,298 8.37 1.1965
2023-10-20 2023-09-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 9,718 -297 -2.97 4,888 -6.45 1.3717
2023-07-18 2023-06-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 10,015 -445 -4.25 5,225 -13.32 1.3308
2023-04-17 2023-03-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 10,460 -225 -2.11 6,029 2.45 1.6084
2023-02-01 2022-12-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 10,685 -568 -5.05 5,884 3.10 1.5864
2022-10-18 2022-09-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 11,253 -136 -1.19 5,707 -7.76 1.5914
2022-07-25 2022-06-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 11,389 -98 -0.85 6,187 -8.81 1.7198
2022-04-25 2022-03-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 11,487 211 1.87 6,785 -9.82 1.5516
2022-01-28 2021-12-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 11,276 -67 -0.59 7,524 16.09 1.7035
2021-10-14 2021-09-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 11,343 867 8.28 6,481 22.63 1.6256
2021-07-07 2021-06-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 10,476 361 3.57 5,285 14.49 1.3912
2021-04-05 2021-03-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 10,115 543 5.67 4,616 3.54 1.3574
2021-02-01 2020-12-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 9,572 -97 -1.00 4,458 4.43 1.4162
2020-10-19 2020-09-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 9,669 459 4.98 4,269 27.93 1.4876
2020-08-11 2020-06-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 9,210 318 3.58 3,337 32.32 1.3782
2020-04-21 2020-03-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 8,892 269 3.12 2,522 -9.96 1.3241
2020-02-04 2019-12-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 8,623 5 0.06 2,801 11.59 1.2484
2019-10-15 2019-09-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 8,618 27 0.31 2,510 -0.52 1.1841
2019-07-22 2019-06-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 8,591 -35 -0.41 2,523 6.86 1.2469
2019-05-14 2019-03-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 8,626 159 1.88 2,361 24.59 1.2248
2019-02-14 2018-12-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 8,467 513 6.45 1,895 -2.42 1.1818
2018-10-12 2018-09-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 7,954 70 0.89 1,942 18.92 1.0739
2018-07-26 2018-06-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 7,884 74 0.95 1,633 1.24 1.0389
2018-05-09 2018-03-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 7,810 -694 -8.16 1,613 -0.12 1.0796
2018-02-13 2017-12-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 8,504 -20 -0.23 1,615 0.12 1.0492
2017-11-13 2017-09-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 8,524 157 1.88 1,613 10.48 1.1042
2018-01-03 2017-06-30 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 8,367 87 1.05 1,460 14.78 1.0634
2018-01-04 2017-03-31 13F THERMO FISHER SCIENTIFIC Common Stock 883556102 8,280 8,280 1,272 0.9528
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.