Thermo Fisher Scientific Inc.
CL ˙ SNSE ˙ US8835561023
SecurityCL:TMOCL / Thermo Fisher Scientific Inc.
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership2,190,608 shares
Latest Disclosed Value $ 1,269,347,806
Alliancebernstein L.p. reports 10.57% decrease in ownership of TMOCL / Thermo Fisher Scientific Inc.

On May 15, 2026 - Alliancebernstein L.p. filed a 13F-HR form disclosing ownership of 2,190,608 shares of Thermo Fisher Scientific Inc. (CL:TMOCL) valued at $1,269,347,806 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 2,449,523 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -10.57% during the quarter.

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 .

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 2,190,608 -258,915 -10.57 1,269,348 -10.57 0.4110
2026-02-17 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,449,523 -92,218 -3.63 1,419,376 15.13 0.4482
2025-11-14 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,541,741 369,975 17.04 1,232,795 40.00 0.3882
2025-08-14 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,171,766 405,699 22.97 880,564 0.20 0.2872
2025-05-15 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,766,067 272,747 18.26 878,795 13.12 0.3179
2025-02-12 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,493,320 -101,103 -6.34 776,870 -21.23 0.2636
2024-11-14 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,594,423 -84,454 -5.03 986,262 6.23 0.3313
2024-08-14 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,678,877 -174,177 -9.40 928,419 -13.80 0.3238
2024-05-14 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,853,054 19,270 1.05 1,077,014 10.65 0.3811
2024-02-14 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,833,784 217,034 13.42 973,354 18.94 0.3745
2023-11-14 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,616,750 -11,273 -0.69 818,350 -3.66 0.3481
2023-08-15 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,628,023 87,216 5.66 849,421 -4.35 0.3467
2023-05-15 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,540,807 -106,434 -6.46 888,075 -2.10 0.3805
2023-02-15 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,647,241 -10,787 -0.65 907,119 7.87 0.4082
2022-11-15 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,658,028 200,571 13.76 840,935 6.20 0.4071
2022-08-15 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,457,457 40,539 2.86 791,807 -5.39 0.3617
2022-05-13 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,416,918 95,405 7.22 836,903 -5.09 0.3230
2022-02-14 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,321,513 -4,292 -0.32 881,766 16.41 0.3117
2021-11-10 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,325,805 233,150 21.34 757,472 37.42 0.2988
2021-07-30 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,092,655 136,094 14.23 551,212 26.26 0.2213
2021-05-06 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 956,561 361,897 60.86 436,555 57.61 0.1914
2021-02-08 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 594,664 -432 -0.07 276,983 5.42 0.1307
2020-11-12 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 595,096 8,827 1.51 262,747 23.69 0.1414
2020-08-13 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 586,269 -51,901 -8.13 212,429 17.37 0.1248
2020-05-14 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 638,170 7,602 1.21 180,985 -11.65 0.1298
2020-02-18 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 630,568 -25,310 -3.86 204,853 7.23 0.1164
2019-11-14 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 655,878 -25,917 -3.80 191,038 -4.59 0.1189
2019-08-14 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 681,795 41,348 6.46 200,230 14.22 0.1244
2019-05-14 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 640,447 -4,706 -0.73 175,303 21.42 0.1141
2019-02-13 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 645,153 20,146 3.22 144,379 -5.36 0.1072
2018-11-08 2018-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 625,007 -11,901 -1.87 152,552 15.63 0.0996
2018-08-13 2018-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 636,908 -7,892 -1.22 131,929 -0.90 0.0918
2018-05-14 2018-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 644,800 -18,703 -2.82 133,125 5.67 0.0962
2018-02-13 2017-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 663,503 -6,378 -0.95 125,986 -0.60 0.0901
2017-11-13 2017-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 669,881 7,894 1.19 126,741 9.74 0.0949
2017-08-10 2017-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 661,987 9,767 1.50 115,497 15.29 0.0893
2017-05-11 2017-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 652,220 -14,823 -2.22 100,181 6.44 0.0798
2017-02-13 2016-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 667,043 -26,650 -3.84 94,120 -14.70 0.0784
2016-11-10 2016-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 693,693 -13,651 -1.93 110,339 5.57 0.0931
2016-08-11 2016-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 707,344 15,174 2.19 104,517 6.65 0.0900
2016-05-13 2016-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 692,170 -11,788 -1.67 98,004 -1.85 0.0833
2016-02-16 2015-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 703,958 -19,371 -2.68 99,856 12.90 0.0850
2016-02-12 2015-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 703,958 86,080
2015-11-13 2015-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 723,329 -1,492 -0.21 88,449 -5.96 0.0759
2015-08-14 2015-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 724,821 -11,950 -1.62 94,053 -4.98 0.0777
2015-05-13 2015-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 736,771 -12,983 -1.73 98,978 5.37 0.0802
2015-02-13 2014-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 749,754 -16,636 -2.17 93,937 0.72 0.0780
2014-11-13 2014-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 766,390 3,775 0.50 93,270 3.65 0.0786
2014-08-13 2014-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 762,615 -11,365 -1.47 89,989 -3.30 0.0758
2014-05-13 2014-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 773,980 45,488 6.24 93,063 14.73 0.0804
2014-02-13 2013-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 728,492 -11,648 -1.57 81,117 18.93 0.0725
2013-11-14 2013-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 740,140 47,472 6.85 68,204 16.35 0.0674
2013-08-13 2013-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 692,668 692,668 58,620 0.0622
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.