Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionPettyjohn, Wood & White, Inc
Latest Disclosed Ownership1,038 shares
Latest Disclosed Value $ 510,209
Pettyjohn, Wood & White, Inc ownership in TMO / Thermo Fisher Scientific Inc.

On May 15, 2026 - Pettyjohn, Wood & White, Inc filed a 13F-HR form disclosing ownership of 1,038 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $510,209 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 1,038 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of 0.00% 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 1,038 0 0.00 510 -15.14 0.0813
2026-02-11 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,038 179 20.84 601 44.47 0.0943
2025-11-13 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 859 0 0.00 417 19.54 0.0688
2025-08-12 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 859 0 0.00 348 -18.50 0.0622
2025-05-08 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 859 63 7.91 427 3.14 0.0819
2025-02-05 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 796 0 0.00 414 -15.85 0.0759
2024-11-12 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 796 0 0.00 492 11.82 0.0907
2024-08-14 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 796 -50 -5.91 440 -10.39 0.0855
2024-05-08 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 846 -29 -3.31 492 5.82 0.0979
2024-02-14 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 875 -111 -11.26 464 -7.01 0.1006
2023-11-14 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 986 11 1.13 499 -1.77 0.1178
2023-08-10 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 975 0 0.00 509 -9.45 0.1171
2023-04-25 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 975 10 1.04 562 0.1374
2023-02-02 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 965 0 0.00 1 -100.00 0.1324
2022-10-28 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 965 54 5.93 489 -1.21 0.1304
2022-08-08 2022-06-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 911 0 0.00 495 -7.99 0.1171
2022-08-08 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 911 0 495 0.1171
2022-04-22 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 911 0 0.00 538 -11.51 0.1150
2022-02-04 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 911 -25 -2.67 608 13.64 0.1253
2021-11-08 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 936 -25 -2.60 535 10.31 0.1188
2021-08-03 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 961 -80 -7.68 485 2.11 0.1086
2021-05-10 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,041 250 31.61 475 29.08 0.1127
2021-02-04 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 791 0 0.00 368 5.44 0.0940
2020-10-26 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 791 -50 -5.95 349 14.43 0.1020
2020-08-04 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 841 -20 -2.32 305 25.00 0.0975
2020-04-20 2020-03-31 13F THERMO FISHER SCI COM 883556102 861 60 7.49 244 -6.15 0.0910
2020-02-11 2019-12-31 13F THERMO FISHER SCI COM 883556102 801 100 14.27 260 27.45 0.0748
2019-11-04 2019-09-30 13F THERMO FISHER SCI COM 883556102 701 0 0.00 204 -0.97 0.0620
2019-08-02 2019-06-30 13F THERMO FISHER SCI COM 883556102 701 701 206 0.0638
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.