Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionCIBC World Markets Inc.
Latest Disclosed Ownership100,534 shares
Latest Disclosed Value $ 49,415,648
CIBC World Markets Inc. ownership in TMO / Thermo Fisher Scientific Inc.

On May 14, 2026 - CIBC World Markets Inc. filed a 13F-HR form disclosing ownership of 100,534 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $49,415,648 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 108,430 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -7.28% during the quarter.

CIBC World Markets Inc. has a history of taking positions in derivatives of the underlying security (TMO) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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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)
2026-05-14 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 100,534 -7,896 -7.28 49,416 -21.35 0.0807
2026-02-10 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 108,430 -7,990 -6.86 62,830 11.27 0.1013
2025-11-06 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 116,420 32,400 38.56 56,466 65.75 0.1012
2025-08-14 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 84,020 25,639 43.92 34,067 17.27 0.0675
2025-05-14 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 58,381 4,363 8.08 29,050 103,650.00 0.0622
2025-01-23 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 54,018 -4,737 -8.06 28 -22.22 0.0589
2024-11-12 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 58,755 1,700 2.98 36 16.13 0.0757
2024-08-07 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 57,055 2,214 4.04 32 0.00 0.0727
2024-05-13 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 54,841 10,733 24.33 32 34.78 0.0757
2024-02-13 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 44,108 -7,540 -14.60 23 -11.54 0.0594
2023-11-13 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 51,648 8,040 18.44 26 18.18 0.0863
2023-08-11 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 43,608 575 1.34 23 -8.33 0.0724
2023-05-12 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 43,033 -2,684 -5.87 25 -4.00 0.0836
2023-02-13 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 45,717 -2,029 -4.25 25 -99.90 0.0890
2022-11-10 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 47,746 5,941 14.21 24,216 6.62 0.0930
2022-08-10 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 41,805 -10,081 -19.43 22,712 -25.89 0.0798
2022-05-12 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 51,886 1,668 3.32 30,646 -8.54 0.0971
2022-02-14 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 50,218 -3,323 -6.21 33,507 9.54 0.0964
2021-11-12 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 53,541 9,097 20.47 30,590 36.43 0.1003
2021-08-12 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 44,444 -364 -0.81 22,421 9.64 0.0626
2021-05-11 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 44,808 5,584 14.24 20,449 11.93 0.0595
2021-02-08 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 39,224 4,463 12.84 18,270 19.04 0.0581
2020-11-12 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 34,761 7,477 27.40 15,348 55.25 0.0666
2020-08-13 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 27,284 1,469 5.69 9,886 35.04 0.0447
2020-05-15 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 25,815 -19,348 -42.84 7,321 -50.10 0.0374
2020-02-13 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 45,163 24,694 120.64 14,672 146.09 0.0599
2019-11-13 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 20,469 -3,189 -13.48 5,962 -14.19 0.0268
2019-08-08 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 23,658 3,045 14.77 6,948 23.15 0.0308
2019-05-09 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 20,613 -311 -1.49 5,642 20.48 0.0260
2019-02-13 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 20,924 9,358 80.91 4,683 65.89 0.0239
2018-11-09 2018-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 11,566 -5,100 -30.60 2,823 -18.22 0.0121
2018-08-08 2018-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 16,666 7,615 84.13 3,452 84.70 0.0151
2018-05-18 2018-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 9,051 -204,158 -95.75 1,869 -95.38 0.0077
2018-02-01 2017-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 213,209 209,908 6,358.92 40,484 6,377.44 0.1832
2017-11-13 2017-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,301 -3,470 -51.25 625 -47.08 0.0030
2017-08-10 2017-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 6,771 -147,643 -95.62 1,181 -95.02 0.0050
2017-05-08 2017-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 154,414 145,778 1,688.03 23,718 1,845.69 0.0764
2017-05-08 2016-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 8,636 4,256 97.17 1,219 74.89 0.0045
2017-01-09 2016-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,636 4,256 1,219 0.0050
2017-05-08 2016-09-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 4,380 -4,130 -48.53 697 -44.55 0.0028
2016-11-03 2016-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 4,380 -4,130 697 0.0030
2016-07-21 2016-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,510 6,174 264.30 1,257 279.76 0.0055
2016-05-04 2016-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,336 -2,987 -56.11 331 -56.16 0.0015
2016-01-14 2015-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 5,323 -12,064 -69.39 755 -64.49 0.0038
2015-10-26 2015-09-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 17,387 -139 -0.79 2,126 -6.51 0.0105
2015-10-22 2015-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 17,387 -139 2,126 0.0107
2015-07-22 2015-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 17,526 -4,510 -20.47 2,274 -23.18 0.0099
2015-04-23 2015-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 22,036 22,036 0.00 2,960 0.0121
2015-02-04 2014-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 0 -5,463 -100.00 0 -100.00
2014-10-22 2014-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,463 175 3.31 665 6.57 0.0024
2014-08-08 2014-06-30 13F THERMO FISHER SCIENTIFIC I COM 883556102 5,288 -25,897 -83.04 624 -83.36 0.0022
2014-05-13 2014-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 31,185 31,185 3,750 0.0143
Disclosed Call 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
(%)
2020-05-15 2020-03-31 13F THERMO FISHER SCIENTIFIC COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-02-13 2019-12-31 13F THERMO FISHER SCIENTIFIC COM Call 10,000 -60.00 3,249 -55.38 n/a n/a n/a
2019-11-13 2019-09-30 13F THERMO FISHER SCIENTIFIC COM Call 25,000 7,282 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.