Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership86,452 shares
Latest Disclosed Value $ 42,509,641
Advisor Group Holdings, Inc. reports 2.23% increase in ownership of TMO / Thermo Fisher Scientific Inc.

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 86,452 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $42,509,641 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 84,569 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of 2.23% 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 86,452 1,883 2.23 42,510 -13.29 0.0362
2026-02-17 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 84,569 -11,551 -12.02 49,027 5.48 0.0716
2025-11-14 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 96,120 28,405 41.95 46,479 62.67 0.0651
2025-09-04 2025-06-30 13F/A-1 HERMO FISHER SCIENTIFIC COM 883556102 67,715 17,806 35.68 28,572 14.97 0.0509
2025-08-13 2025-06-30 13F HERMO FISHER SCIENTIFIC COM 883556102 47,957 -1,952 22,877 0.0265
2025-05-12 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 49,909 -10,514 -17.40 24,851 5.31 0.0554
2025-06-06 2024-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 60,423 15,939 35.83 23,598 -14.29 0.0530
2025-02-07 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 56,977 12,493 23,453 0.0598
2024-11-13 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 44,484 -5,083 -10.25 27,531 0.39 0.0621
2024-08-13 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 49,567 791 1.62 27,423 -3.30 0.0648
2024-05-10 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 48,776 -53,535 -52.33 28,360 -47.79 0.0633
2024-02-12 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 102,311 -27,955 -21.46 54,323 -17.64 0.0951
2023-11-13 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 130,266 23,454 21.96 65,955 18.35 0.0975
2023-08-21 2023-06-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 106,812 -17 -0.02 55,726 -9.51 0.1001
2023-08-10 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,204,394 2,097,565 53,628 0.0145
2023-05-12 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 106,829 -2,307 -2.11 61,581 2.44 0.1159
2023-02-10 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 109,136 7,307 7.18 60,114 16.37 0.1217
2022-11-14 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 101,829 8,206 8.76 51,658 1.55 0.1181
2022-08-10 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 93,623 -2,323 -2.42 50,871 -7.69 0.1122
2022-05-04 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 95,946 -3,013 -3.04 55,109 -16.44 0.1069
2022-02-03 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 98,959 5,860 6.29 65,951 23.96 0.1248
2021-11-05 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 93,099 4,685 5.30 53,205 19.21 0.1109
2021-08-02 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 88,414 3,262 3.83 44,633 14.85 0.0966
2021-05-13 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 85,152 5,501 6.91 38,862 4.75 0.0935
2021-02-10 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 79,651 1,256 1.60 37,098 8.03 0.0991
2020-11-12 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 78,395 6,700 9.35 34,342 32.19 0.1027
2020-08-14 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 71,695 -83,034 -53.66 25,980 35.31 0.0872
2020-05-18 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 154,729 154,729 19,200 0.0786
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.