Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionMontag A & Associates Inc
Latest Disclosed Ownership9,619 shares
Latest Disclosed Value $ 4,732,355
Montag A & Associates Inc reports 6.25% increase in ownership of TMO / Thermo Fisher Scientific Inc.

On April 29, 2026 - Montag A & Associates Inc filed a 13F-HR form disclosing ownership of 9,619 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $4,732,355 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 9,053 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of 6.25% 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)
2026-04-29 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 9,619 566 6.25 4,732 -9.85 0.2198
2026-02-02 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 9,053 322 3.69 5,249 23.86 0.2395
2025-11-12 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,731 -4,001 -31.42 4,239 -17.98 0.1950
2025-08-07 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 12,732 -265 -2.04 5,168 -20.16 0.2517
2025-05-05 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 12,997 -135 -1.03 6,473 -5.32 0.3238
2025-01-30 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 13,132 -200 -1.50 6,837 -17.15 0.3245
2024-11-05 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 13,332 -276 -2.03 8,252 9.58 0.3897
2024-07-31 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 13,608 55 0.41 7,530 -4.47 0.3800
2024-05-07 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 13,553 -66 -0.48 7,882 8.97 0.3940
2024-02-07 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 13,619 -109 -0.79 7,233 4.03 0.4034
2023-11-09 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 13,728 217 1.61 6,953 -1.42 0.4390
2023-08-09 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 13,511 68 0.51 7,054 -9.02 0.4344
2023-05-11 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 13,443 -150 -1.10 7,753 3.51 0.5069
2023-02-02 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 13,593 -995 -6.82 7,489 1.16 0.5015
2022-11-09 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 14,588 280 1.96 7,403 -4.81 0.5126
2022-08-10 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 14,308 -1,934 -11.91 7,777 -18.93 0.5031
2022-05-02 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 16,242 -794 -4.66 9,593 -15.61 0.5093
2022-02-09 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 17,036 -2,176 -11.33 11,367 3.56 0.5606
2021-11-08 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 19,212 -327 -1.67 10,976 11.35 0.5894
2021-08-03 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 19,539 -912 -4.46 9,857 5.61 0.5234
2021-05-14 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 20,451 -5,790 -22.06 9,333 -23.64 0.5255
2021-02-12 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 26,241 -2,254 -7.91 12,223 -2.85 0.7508
2020-11-12 2020-09-30 13F THERMO FISCHER SCIENTIFIC COM 883556102 28,495 -1,678 -5.56 12,581 15.07 1.0148
2020-08-04 2020-06-30 13F THERMO FISCHER SCIENTIFIC COM 883556102 30,173 -7,530 -19.97 10,933 2.24 0.9566
2020-05-06 2020-03-31 13F THERMO FISCHER SCIENTIFIC COM 883556102 37,703 -1,921 -4.85 10,693 -16.93 1.0667
2020-02-05 2019-12-31 13F THERMO FISCHER SCIENTIFIC COM 883556102 39,624 -1,891 -4.55 12,873 6.46 1.0290
2019-11-04 2019-09-30 13F THERMO FISCHER SCIENTIFIC COM 883556102 41,515 33,569 422.46 12,092 418.08 1.0521
2019-08-06 2019-06-30 13F THERMO FISCHER SCIENTIFIC COM 883556102 7,946 6,940 689.86 2,334 748.73 0.2081
2019-05-01 2019-03-31 13F THERMO FISCHER SCIENTIFIC COM 883556102 1,006 -24 -2.33 275 19.05 0.0255
2019-02-06 2018-12-31 13F THERMO FISCHER SCIENTIFIC COM 883556102 1,030 1,030 231 0.0248
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.