써모 피셔 사이언티픽(주)
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionCi Investments Inc.
Latest Disclosed Ownership428,160 shares
Latest Disclosed Value $ 210,453,485
Ci Investments Inc. ownership in TMO / Thermo Fisher Scientific Inc.

On May 13, 2026 - Ci Investments Inc. filed a 13F-HR form disclosing ownership of 428,160 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $210,453,485 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 547,787 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -21.84% during the quarter.

Ci Investments 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)
2026-05-13 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 428,160 -119,627 -21.84 210,453 -33.70 1.0193
2026-02-12 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 547,787 -64,098 -10.48 317,415 107,134.80 1.3905
2025-11-12 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 611,885 83,388 15.78 297 38.32 1.0785
2025-08-12 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 528,497 131,509 33.13 214 8.63 0.8039
2025-05-13 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 396,988 21,349 5.68 198 1.03 0.8323
2025-02-12 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 375,639 172,946 85.32 195 56.00 0.7361
2024-11-12 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 202,693 -23,628 -10.44 125 0.00 0.4772
2024-08-12 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 226,321 -11,010 -4.64 125 -8.76 0.4929
2024-05-13 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 237,331 -75,939 -24.24 138 -17.47 0.5475
2024-02-12 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 313,270 -140,098 -30.90 166 -27.51 0.8598
2023-11-13 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 453,368 1,844 0.41 229 -2.55 1.2803
2023-08-11 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 451,524 21,195 4.93 236 -5.24 1.1885
2023-05-12 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 430,329 -32,566 -7.04 248 -2.36 1.2479
2023-02-10 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 462,895 20,656 4.67 255 -99.89 1.2891
2022-11-14 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 442,239 35,095 8.62 224,299 1.40 1.1638
2022-08-12 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 407,144 93,665 29.88 221,193 19.46 1.0317
2022-05-12 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 313,479 20,276 6.92 185,156 -5.36 0.6811
2022-02-11 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 293,203 -6,377 -2.13 195,637 14.30 0.6751
2021-11-12 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 299,580 177,346 145.09 171,159 177.57 0.6373
2021-08-13 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 122,234 -141,267 -53.61 61,663 -48.72 0.2260
2021-05-13 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 263,501 -115,009 -30.38 120,257 -31.79 0.5072
2021-02-09 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 378,510 -32,108 -7.82 176,303 -2.75 0.7768
2020-11-09 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 410,618 76,420 22.87 181,296 49.72 0.9009
2020-08-07 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 334,198 34,417 11.48 121,093 42.43 0.6454
2020-08-07 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 299,781 -24,478 -7.55 85,018 -19.29 0.5157
2020-02-11 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 324,259 -9,773 -2.93 105,342 8.27 0.5350
2019-11-08 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 334,032 54,031 19.30 97,294 18.32 0.5025
2019-08-12 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 280,001 -356,791 -56.03 82,231 -52.82 0.4576
2019-05-15 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 636,792 135,686 27.08 174,303 55.43 0.9774
2019-02-15 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 501,106 10,266 2.09 112,143 -6.39 0.7238
2018-11-09 2018-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 490,840 -113,800 -18.82 119,804 -4.34 0.8971
2018-08-14 2018-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 604,640 -20,980 -3.35 125,245 -3.04 0.9840
2018-05-11 2018-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 625,620 -44,322 -6.62 129,166 1.54 1.4870
2018-05-11 2017-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 669,942 21,697 3.35 127,209 3.72 1.3043
2018-02-02 2017-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 669,942 21,697 127,209
2018-05-11 2017-09-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 648,245 -119,755 -15.59 122,648 -8.47 1.1971
2017-11-06 2017-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 648,245 -119,755 122,648
2017-08-10 2017-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 768,000 70,200 10.06 133,993 25.01 1.4511
2017-05-05 2017-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 697,800 -181,700 -20.66 107,182 -13.63 1.2179
2017-02-06 2016-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 879,500 -32,950 -3.61 124,097 -14.49 1.3584
2016-11-04 2016-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 912,450 89,150 10.83 145,134 19.30 1.5849
2016-08-24 2016-06-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 823,300 -19,700 -2.34 121,651 1.92 1.4825
2016-08-05 2016-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 823,300 121,651
2016-05-06 2016-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 843,000 -40,900 -4.63 119,360 -4.80 1.5224
2016-02-05 2015-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 883,900 -173,600 -16.42 125,381 -3.04 1.6017
2015-11-12 2015-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,057,500 -33,300 -3.05 129,311 -8.64 1.6814
2015-08-12 2015-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,090,800 15,500 1.44 141,542 -2.02 1.5641
2015-05-08 2015-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,075,300 -2,600 -0.24 144,456 6.96 1.5215
2015-02-05 2014-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,077,900 -31,700 -2.86 135,050 0.01 1.5259
2014-11-03 2014-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,109,600 159,300 16.76 135,038 20.42 1.4088
2014-08-01 2014-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 950,300 285,200 42.88 112,135 40.22 1.1084
2014-05-06 2014-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 665,100 665,100 79,972 0.8435
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
(%)
2026-02-12 2025-12-31 13F THERMO FISHER SCIENTIFIC OPTIONS Call 0 -100.00 0 n/a n/a n/a
2025-11-12 2025-09-30 13F THERMO FISHER SCIENTIFIC OPTIONS Call 60 -74.47 0 n/a n/a n/a
2025-08-12 2025-06-30 13F THERMO FISHER SCIENTIFIC OPTIONS Call 235 0 n/a n/a n/a
2025-05-13 2025-03-31 13F THERMO FISHER SCIENTIFIC OPTIONS Call 0 -100.00 0 n/a n/a n/a
2025-02-12 2024-12-31 13F THERMO FISHER SCIENTIFIC OPTIONS Call 899 0 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.