Thermo Fisher Scientific Inc.
US ˙ NYSE ˙ US8835561023

SecurityTMO / Thermo Fisher Scientific Inc.
InstitutionPrudential Plc
Latest Disclosed Ownership14,447 shares
Latest Disclosed Value $ 7,101,134
Prudential Plc reports 88.90% increase in ownership of TMO / Thermo Fisher Scientific Inc.

On May 14, 2026 - Prudential Plc filed a 13F-HR form disclosing ownership of 14,447 shares of Thermo Fisher Scientific Inc. (US:TMO) valued at $7,101,134 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 7,648 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of 88.90% during the quarter. The current value of the position is $6,847,156 USD.

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)
2026-05-14 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 14,447 6,799 88.90 7,101 60.26 0.0306
2026-02-11 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 7,648 702 10.11 4,432 31.56 0.0351
2025-11-14 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 6,946 -766 -9.93 3,369 7.74 0.0248
2025-08-12 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 7,712 1,540 24.95 3,127 1.79 0.0189
2025-05-13 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 6,172 -649 -9.51 3,071 -13.44 0.0154
2025-02-13 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 6,821 86 1.28 3,548 -14.83 0.0178
2024-11-13 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 6,735 -2,443 -26.62 4,166 -17.91 0.0209
2024-08-07 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 9,178 1,024 12.56 5,075 7.09 0.0342
2024-05-14 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,154 -9,006 -52.48 4,739 -47.97 0.0361
2024-02-14 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 17,160 -1,297 -7.03 9,108 -2.50 0.0924
2023-11-13 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 18,457 -685 -3.58 9,342 -6.46 0.1038
2023-08-14 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 19,142 305 1.62 9,987 -8.01 0.1168
2023-05-12 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 18,837 -506 -2.62 10,857 1.93 0.1274
2023-02-09 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 19,343 7,217 59.52 10,652 73.19 0.1337
2022-11-14 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 12,126 1,172 10.70 6,150 3.34 0.0973
2022-08-12 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 10,954 3,324 43.56 5,951 32.04 0.1077
2022-05-13 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 7,630 7,630 4,507 0.0652
2022-02-11 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 0 -449 -100.00 0 -100.00
2021-11-10 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 449 -193 -30.06 257 -20.68 0.0036
2021-08-13 2021-06-30 13F THERMO FISHER SCIENT THERMO FISHER SCIENTIFIC INC 883556102 642 0 0.00 324 10.58 0.0030
2021-05-14 2021-03-31 13F THERMO FISHER SCIENT THERMO FISHER SCIENTIFIC INC 883556102 642 0 0.00 293 -2.01 0.0020
2021-02-10 2020-12-31 13F/A-1 THERMO FISHER SCIENT THERMO FISHER SCIENTIFIC INC 883556102 642 43 7.18 299 13.26 0.0016
2021-02-08 2020-12-31 13F THERMO FISHER SCIENT THERMO FISHER SCIENTIFIC INC 883556102 642 43 299 680.3285
2020-10-30 2020-09-30 13F THERMO FISHER SCIENT THERMO FISHER SCIENTIFIC INC 883556102 599 599 264 0.0013
2020-02-13 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 0 -9,357 -100.00 0 -100.00
2019-11-12 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 9,357 856 10.07 2,723 8.96 0.0080
2019-10-04 2019-06-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 8,501 1,028 13.76 2,499 22.14 0.0076
2019-08-14 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,501 1,028 2,499
2019-10-04 2019-03-31 13F/A-1 THERMO FISHER SCIE COM USD1 883556102 7,473 285 3.96 2,046 27.16 0.0074
2019-05-13 2019-03-31 13F THERMO FISHER SCIE COM USD1 883556102 7,473 285 2,046
2019-10-04 2018-12-31 13F/A-1 THERMO FISHER SCIE COM USD1 883556102 7,188 4,760 196.05 1,609 171.33 0.0065
2019-02-13 2018-12-31 13F THERMO FISHER SCIE COM USD1 883556102 7,188 4,760 1,609
2019-10-03 2018-09-30 13F/A-1 THERMO FISHER SCIE COM USD1 883556102 2,428 -109,036 -97.82 593 -97.43 0.0019
2018-11-14 2018-09-30 13F THERMO FISHER SCIE COM USD1 883556102 2,428 -109,036 593
2018-08-14 2018-06-30 13F THERMO FISHER SCIE COM USD1 883556102 111,464 17,677 18.85 23,089 19.24 0.0723
2018-05-15 2018-03-31 13F THERMO FISHER SCIE COM USD1 883556102 93,787 -169 -0.18 19,363 8.54 0.0605
2018-02-14 2017-12-31 13F THERMO FISHER SCIE COM USD1 883556102 93,956 -97 -0.10 17,840 0.25 0.0543
2017-11-14 2017-09-30 13F THERMO FISHER SCIE COM USD1 883556102 94,053 353 0.38 17,795 8.85 0.0561
2017-08-14 2017-06-30 13F THERMO FISHER SCIE COM USD1 883556102 93,700 -264 -0.28 16,348 13.27 0.0536
2017-05-15 2017-03-31 13F THERMO FISHER SCIE COM USD1 883556102 93,964 224 0.24 14,433 9.12 0.0484
2017-02-09 2016-12-31 13F THERMO FISHER SCIE COM USD1 883556102 93,740 0 0.00 13,227 -11.29 0.0465
2016-11-14 2016-09-30 13F THERMO FISHER SCIE COM USD1 883556102 93,740 198 0.21 14,910 7.87 0.0563
2016-08-09 2016-06-30 13F THERMO FISHER SCIE COM USD1 883556102 93,542 0 0.00 13,822 4.36 0.0542
2016-05-13 2016-03-31 13F THERMO FISHER SCIE COM USD1 883556102 93,542 91,137 3,789.48 13,245 3,784.16 0.0537
2016-02-12 2015-12-31 13F THERMO FISHER SCIE COM USD1 883556102 2,405 0 0.00 341 15.99 0.0014
2015-11-13 2015-09-30 13F THERMO FISHER SCIE COM USD1 883556102 2,405 0 0.00 294 -5.77 0.0013
2015-08-14 2015-06-30 13F THERMO FISHER SCIE COM USD1 883556102 2,405 0 0.00 312 -3.41 0.0012
2015-05-15 2015-03-31 13F THERMO FISHER SCIE COM USD1 883556102 2,405 0 0.00 323 7.31 0.0014
2015-02-13 2014-12-31 13F THERMO FISHER SCIE COM USD1 883556102 2,405 0 0.00 301 2.73 0.0013
2014-11-14 2014-09-30 13F THERMO FISHER SCIE COM USD1 883556102 2,405 0 0.00 293 3.17 0.0012
2014-08-14 2014-06-30 13F THERMO FISHER SCIE COM USD1 883556102 2,405 0 0.00 284 -1.73 0.0012
2014-05-15 2014-03-31 13F THERMO FISHER SCIE COM USD1 883556102 2,405 0 0.00 289 7.84 0.0013
2014-02-14 2013-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,405 0 0.00 268 20.72 0.0011
2013-12-18 2013-09-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 2,405 0 0.00 222 8.82 0.0011
2013-11-15 2013-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,405 222
2013-08-15 2013-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,405 2,405 204 0.0011
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.