Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionBamco Inc /ny/
Latest Disclosed Ownership23,670 shares
Latest Disclosed Value $ 11,634,515
Bamco Inc /ny/ reports 17.87% decrease in ownership of TMO / Thermo Fisher Scientific Inc.

On May 15, 2026 - Bamco Inc /ny/ filed a 13F-HR form disclosing ownership of 23,670 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $11,634,515 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 28,820 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -17.87% 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 23,670 -5,150 -17.87 11,635 -30.33 0.0351
2026-02-17 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 28,820 4,108 16.62 16,700 39.33 0.0452
2025-11-14 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 24,712 -6,054 -19.68 11,986 -3.92 0.0318
2025-08-14 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 30,766 -6,869 -18.25 12,474 -33.39 0.0338
2025-05-15 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 37,635 -4,000 -9.61 18,727 -13.54 0.0550
2025-02-14 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 41,635 0 0.00 21,660 -15.90 0.0560
2024-11-14 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 41,635 498 1.21 25,754 13.21 0.0683
2024-08-14 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 41,137 6,727 19.55 22,749 13.75 0.0651
2024-05-15 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 34,410 5,672 19.74 19,999 31.12 0.0533
2024-02-14 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 28,738 5,578 24.08 15,254 30.12 0.0406
2023-11-14 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 23,160 1,101 4.99 11,723 1.85 0.0341
2023-08-14 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 22,059 589 2.74 11,509 -6.99 0.0319
2023-05-15 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 21,470 1,857 9.47 12,375 14.57 0.0371
2023-02-14 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 19,613 -1,297 -6.20 10,801 1.84 0.0363
2022-11-14 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 20,910 -1,153 -5.23 10,605 -11.52 0.0343
2022-08-15 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 22,063 -112 -0.51 11,986 -8.49 0.0385
2022-05-13 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 22,175 581 2.69 13,098 -9.09 0.0321
2022-02-14 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 21,594 3,194 17.36 14,408 37.06 0.0306
2021-11-12 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 18,400 5,441 41.99 10,512 60.81 0.0238
2021-08-13 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 12,959 300 2.37 6,537 13.16 0.0150
2021-05-19 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 12,659 5,700 81.91 5,777 78.25 0.0142
2021-02-12 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 6,959 2,948 73.50 3,241 83.00 0.0080
2020-11-13 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 4,011 406 11.26 1,771 35.60 0.0054
2020-08-14 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,605 625 20.97 1,306 54.56 0.0047
2020-05-15 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,980 299 11.15 845 -2.99 0.0041
2020-02-18 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,681 541 25.28 871 39.81 0.0033
2019-11-14 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,140 2,140 623 0.0026
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.