Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionToronto Dominion Bank
Latest Disclosed Ownership116,473 shares
Latest Disclosed Value $ 57,254,117
Toronto Dominion Bank ownership in TMO / Thermo Fisher Scientific Inc.

On May 15, 2026 - Toronto Dominion Bank filed a 13F-HR form disclosing ownership of 116,473 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $57,254,117 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 204,363 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -43.01% during the quarter.

Toronto Dominion Bank 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.

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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)
2026-05-15 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 116,473 -87,890 -43.01 57,254 -51.65 0.0295
2026-02-17 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 204,363 56,869 38.56 118,415 65.77 0.1748
2025-11-14 2025-09-30 13F Thermo Fisher Scientific COM 883556102 147,494 -203,817 -58.02 71,434 -49.85 0.1108
2025-08-14 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 351,311 162,066 85.64 142,445 51.27 0.2363
2025-05-15 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 189,245 -20,386 -9.72 94,168 -13.65 0.1845
2025-02-19 2024-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 209,631 -7,240 -3.34 109,054 -18.71 0.1722
2025-02-14 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 209,631 -7,240 109,054 0.0528
2024-11-18 2024-09-30 13F/A-1 Thermo Fisher Scientific COM 883556102 216,871 13,319 6.54 134,150 19.18 0.2372
2024-11-14 2024-09-30 13F Thermo Fisher Scientific COM 883556102 216,871 13,319 134,150 0.0094
2024-08-14 2024-06-30 13F Thermo Fisher Scientific COM 883556102 203,552 -125,373 -38.12 112,564 -41.12 0.1806
2024-05-14 2024-03-31 13F Thermo Fisher Scientific COM 883556102 328,925 95,643 41.00 191,174 54.39 0.2996
2024-02-13 2023-12-31 13F Thermo Fisher Scientific COM 883556102 233,282 18,163 8.44 123,824 13.72 0.1796
2024-02-14 2023-09-30 13F/A-1 Thermo Fisher Scientific COM 883556102 215,119 -7,149 -3.22 108,887 94,583.48 0.1801
2023-11-14 2023-09-30 13F Thermo Fisher Scientific COM 883556102 215,119 -7,149 108,887 0.0071
2024-02-14 2023-06-30 13F/A-1 Thermo Fisher Scientific COM 883556102 222,268 -70,920 -24.19 116 -31.55 0.1719
2023-08-10 2023-06-30 13F Thermo Fisher Scientific COM 883556102 222,268 -70,920 116 0.1724
2023-05-11 2023-03-31 13F Thermo Fisher Scientific COM 883556102 293,188 -34,645 -10.57 169 -6.67 0.2754
2023-02-07 2022-12-31 13F Thermo Fisher Scientific COM 883556102 327,833 56,054 20.62 180 -99.87 0.2701
2022-11-09 2022-09-30 13F Thermo Fisher Scientific COM 883556102 271,779 -54,283 -16.65 137,789 -22.20 0.2453
2022-08-11 2022-06-30 13F Thermo Fisher Scientific COM 883556102 326,062 -38,518 -10.57 177,109 -17.75 0.3299
2022-05-09 2022-03-31 13F Thermo Fisher Scientific COM 883556102 364,580 56,544 18.36 215,333 4.77 0.3250
2022-02-04 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 308,036 18,717 6.47 205,528 24.34 0.2749
2021-11-08 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 289,319 -81,440 -21.97 165,296 -11.62 0.2586
2021-08-13 2021-06-30 13F/A-1 Thermo Fisher Scientific COM 883556102 370,759 -16,171 -4.18 187,033 5.92 0.2896
2021-08-10 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 370,759 -16,171 187,033 0.0616
2021-05-11 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 386,930 43,911 12.80 176,586 10.53 0.3108
2021-02-08 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 343,019 93,059 37.23 159,762 44.75 0.2933
2020-10-30 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 249,960 -30,762 -10.96 110,373 8.50 0.2713
2020-08-28 2020-06-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 280,722 -33,217 -10.58 101,724 14.23 0.2579
2020-08-10 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 7,093 -306,846 101,724 257,944.6268
2020-05-13 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 313,939 -78,361 -19.97 89,049 -30.12 0.2720
2020-02-13 2019-12-31 13F Thermo Fisher Scientific COM 883556102 392,300 93,133 31.13 127,429 46.25 0.2139
2019-11-12 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 299,167 16,024 5.66 87,129 4.81 0.1834
2019-08-26 2019-06-30 13F/A-1 Thermo Fisher Scientific COM 883556102 283,143 -1,544 -0.54 83,132 6.71 0.1770
2019-08-13 2019-06-30 13F Thermo Fisher Scientific COM 883556102 283,143 -1,544 83,132
2019-05-06 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 284,687 -10,971 -3.71 77,904 17.76 0.1217
2019-02-07 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 295,658 13,375 4.74 66,156 -3.96 0.1133
2018-11-07 2018-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 282,283 18,666 7.08 68,885 26.17 0.1259
2018-08-06 2018-06-30 13F Thermo Fisher Scientific PUT 883556102 0 -271,720 -100.00 0 -100.00
2018-08-06 2018-06-30 13F Thermo Fisher Scientific COM 883556102 263,617 -8,103 -2.98 54,595 -2.66 0.1107
2018-05-10 2018-03-31 13F Thermo Fisher Scientific PUT 883556102 271,720 271,720 56,088 0.1249
2018-02-08 2017-12-31 13F Thermo Fisher Scientific COM 883556102 222,842 17,462 8.50 42,314 8.90 0.1253
2017-11-06 2017-09-30 13F Thermo Fisher Scientific COM 883556102 205,380 71,103 52.95 38,855 65.88 0.1249
2017-08-18 2017-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 134,277 27,178 25.38 23,424 42.40 0.0749
2017-05-05 2017-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 107,099 37,307 53.45 16,450 67.07 0.0440
2017-02-06 2016-12-31 13F Thermo Fisher Scientific COM 883556102 69,792 56,604 429.21 9,846 369.30 0.0292
2016-11-03 2016-09-30 13F Thermo Fisher Scientific COM 883556102 13,188 9,281 237.55 2,098 262.35 0.0070
2016-08-15 2016-06-30 13F Thermo Fisher Scientific COM 883556102 3,907 -854 -17.94 579 -13.97 0.0024
2016-05-04 2016-03-31 13F Thermo Fisher Scientific COM 883556102 4,761 -9,639 -66.94 673 -67.06 0.0042
2016-02-09 2015-12-31 13F Thermo Fisher Scientific COM 883556102 14,400 -424 -2.86 2,043 12.69 0.0124
2015-11-10 2015-09-30 13F Thermo Fisher Scientific COM 883556102 14,824 1,079 7.85 1,813 1.68 0.0103
2015-08-11 2015-06-30 13F Thermo Fisher Scientific COM 883556102 13,745 72 0.53 1,783 -2.94 0.0084
2015-05-15 2015-03-31 13F Thermo Fisher Scientific COM 883556102 13,673 -5,782 -29.72 1,837 -24.62 0.0079
2015-02-10 2014-12-31 13F Thermo Fisher Scientific COM 883556102 19,455 8,764 81.98 2,437 165.76 0.0096
2014-11-07 2014-09-30 13F Thermo Fisher Scientific COM 883556102 10,691 664 6.62 917 -22.42 0.0032
2014-08-11 2014-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 10,027 1,272 14.53 1,182 11.09 0.0039
2014-05-09 2014-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,755 487 5.89 1,064 15.65 0.0037
2014-02-11 2013-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,268 5,768 230.72 920 300.00 0.0032
2013-11-13 2013-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,500 1,035 70.65 230 85.48 0.0008
2013-08-14 2013-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,465 1,465 124 0.0005
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
(%)
2018-08-06 2018-06-30 13F Thermo Fisher Scientific PUT 0 -100.00 0 -100.00 n/a n/a n/a
2018-05-10 2018-03-31 13F Thermo Fisher Scientific PUT 271,720 56,088 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.