Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionMendel Money Management
Latest Disclosed Ownership12,148 shares
Latest Disclosed Value $ 5,971,106
Mendel Money Management ownership in TMO / Thermo Fisher Scientific Inc.

On May 4, 2026 - Mendel Money Management filed a 13F-HR form disclosing ownership of 12,148 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $5,971,106 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 11,452 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of 6.08% during the quarter.

Mendel Money Management has a history of taking positions in derivatives of the underlying security (TMO) in the form of stock options.

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 .

Institutional Put/Call Ratios
(Premium Subscription Required)

In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:TMO / Thermo Fisher Scientific Inc. Historical Put/Call Ratio
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)
2026-05-04 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 12,148 696 6.08 5,971 -10.01 2.4983
2026-01-29 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 11,452 39 0.34 6,636 19.87 2.7774
2025-11-10 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 11,413 109 0.96 5,536 20.77 2.3274
2025-08-01 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 11,304 475 4.39 4,583 -14.94 2.0295
2025-05-06 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 10,829 47 0.44 5,388 -3.92 2.5526
2025-02-12 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 10,782 -128 -1.17 5,609 -16.89 2.5042
2024-11-07 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 10,910 -152 -1.37 6,748 10.32 2.9173
2024-08-13 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 11,062 -202 -1.79 6,118 -6.57 2.8637
2024-05-02 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 11,264 -759 -6.31 6,547 2.60 3.0284
2024-02-14 2023-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 12,023 475 4.11 6,382 9.17 3.0662
2023-11-14 2023-09-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 11,548 -277 -2.34 5,845 -5.25 3.1344
2023-11-13 2023-09-30 13F Thermo Fisher Scientific Common Stock 883556102 11,548 -277 5,845 3.1344
2023-08-14 2023-06-30 13F Thermo Fisher Scientific Common Stock 883556102 11,825 -85 -0.71 6,170 -10.13 3.1722
2023-05-10 2023-03-31 13F Thermo Fisher Scientific Common Stock 883556102 11,910 -967 -7.51 6,865 -3.20 3.6982
2023-02-13 2022-12-31 13F Thermo Fisher Scientific Common Stock 883556102 12,877 59 0.46 7,091 9.08 4.0347
2022-11-14 2022-09-30 13F Thermo Fisher Scientific Common Stock 883556102 12,818 13 0.10 6,501 -6.55 4.0537
2022-08-15 2022-06-30 13F Thermo Fisher Scientific Common Stock 883556102 12,805 -135 -1.04 6,957 -8.98 4.1456
2022-05-16 2022-03-31 13F Thermo Fisher Scientific Common Stock 883556102 12,940 6 0.05 7,643 -11.44 3.7330
2022-02-14 2021-12-31 13F Thermo Fisher Scientific Common Stock 883556102 12,934 -812 -5.91 8,630 9.89 4.9760
2021-11-09 2021-09-30 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 13,746 -98 -0.71 7,853 12.44 4.9151
2021-08-11 2021-06-30 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 13,844 -437 -3.06 6,984 7.17 4.3921
2021-05-17 2021-03-31 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 14,281 -1,590 -10.02 6,517 -11.84 4.2555
2021-02-09 2020-12-31 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 15,871 -1,347 -7.82 7,392 -2.76 5.1766
2020-11-10 2020-09-30 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 17,218 -1,081 -5.91 7,602 14.64 5.9484
2020-07-29 2020-06-30 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 18,299 -1,396 -7.09 6,631 3.64 5.8377
2020-02-13 2019-12-31 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 19,695 -345 -1.72 6,398 9.61 5.5363
2019-11-08 2019-09-30 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 20,040 -825 -3.95 5,837 -4.75 5.3956
2019-08-08 2019-06-30 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 20,865 -3,708 -15.09 6,128 2.17 5.8634
2018-10-29 2018-09-30 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 24,573 -2,299 -8.56 5,998 17.54 5.8184
2018-02-06 2017-12-31 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 26,872 -15,743 -36.94 5,103 -7.72 4.8971
2015-07-31 2015-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 42,615 330 0.78 5,530 -2.66 5.1494
2015-05-01 2015-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 42,285 42,285 5,681 5.2804
2015-01-30 2014-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 0 -42,390 -100.00 0 -100.00
2014-11-07 2014-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 42,390 42,390 5,159 5.0480
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2024-05-02 2024-03-31 13F THERMO FISHER SCIENTIFIC COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-02-09 2023-12-31 13F THERMO FISHER SCIENTIFIC COM Put 12,023 6,382 n/a n/a n/a
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.