THERMO FISHER SCIENTIFIC INC

Ticker: TMO CUSIP: 883556102 Class: COM

WELCH & FORBES LLC's Holding History (CIK: 0000105495)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 89,084 Value ($000) $51,620 Avg Close $565.16 Range $486.57 - $601.87

Q3 2025

Shares 89,726 Value ($000) $43,519 Avg Close $464.78 Range $402.70 - $501.56

Q2 2025

Shares 91,114 Value ($000) $36,943 Avg Close $417.06 Range $384.82 - $495.18

Q1 2025

Shares 91,769 Value ($000) $45,664 Avg Close $539.78 Range $482.97 - $608.82

Q4 2024

Shares 91,031 Value ($000) $47,357 Avg Close $547.53 Range $491.20 - $617.36

Q3 2024

Shares 94,277 Value ($000) $58,317 Avg Close $589.13 Range $525.78 - $624.81

Q2 2024

Shares 93,893 Value ($000) $50,722 Avg Close $569.75 Range $526.69 - $598.64

Q1 2024

Shares 93,868 Value ($000) $54,557 Avg Close $557.71 Range $524.04 - $600.06

Q4 2023

Shares 87,637 Value ($000) $46,517 Avg Close $480.76 Range $412.73 - $532.66

Q3 2023

Shares 87,571 Value ($000) $44,326 Avg Close $528.90 Range $491.51 - $575.69

Q2 2023

Shares 83,985 Value ($000) $43,819 Avg Close $535.25 Range $494.39 - $588.28

Q1 2023

Shares 82,343 Value ($000) $47,460 Avg Close $558.70 Range $518.14 - $604.43

Q4 2022

Shares 81,069 Value ($000) $44,644 Avg Close $524.96 Range $471.30 - $579.21

Q3 2022

Shares 81,376 Value ($000) $41,274 Avg Close $554.13 Range $500.83 - $604.99

Q2 2022

Shares 80,618 Value ($000) $43,797 Avg Close $544.70 Range $492.89 - $611.86

Q1 2022

Shares 78,519 Value ($000) $46,377 Avg Close $568.16 Range $508.25 - $656.92

Q4 2021

Shares 76,127 Value ($000) $50,795 Avg Close $617.25 Range $545.68 - $664.90

Q3 2021

Shares 75,825 Value ($000) $43,322 Avg Close $542.36 Range $497.26 - $609.86

Q2 2021

Shares 73,141 Value ($000) $36,898 Avg Close $466.00 Range $433.25 - $504.51

Q1 2021

Shares 69,931 Value ($000) $31,916 Avg Close $471.13 Range $427.86 - $519.72

Q4 2020

Shares 67,923 Value ($000) $31,638 Avg Close $462.59 Range $427.16 - $525.38

Q3 2020

Shares 67,441 Value ($000) $29,776 Avg Close $407.40 Range $352.00 - $438.79

Q2 2020

Shares 66,094 Value ($000) $23,949 Avg Close $330.32 Range $266.44 - $358.87

Q1 2020

Shares 62,800 Value ($000) $17,810 Avg Close $310.51 Range $246.54 - $336.98

Q4 2019

Shares 60,124 Value ($000) $19,533 Avg Close $298.40 Range $266.00 - $325.05

Q3 2019

Shares 59,399 Value ($000) $17,301 Avg Close $281.62 Range $262.06 - $300.37

Q2 2019

Shares 57,644 Value ($000) $16,929 Avg Close $270.70 Range $248.84 - $293.42

Q1 2019

Shares 55,273 Value ($000) $15,129 Avg Close $244.42 Range $206.29 - $269.21

Q4 2018

Shares 53,283 Value ($000) $11,924 Avg Close $230.26 Range $204.59 - $249.16

Q3 2018

Shares 51,428 Value ($000) $12,553 Avg Close $225.62 Range $199.95 - $240.42

Q2 2018

Shares 47,955 Value ($000) $9,933 Avg Close $208.02 Range $195.82 - $217.41

Q1 2018

Shares 12,042 Value ($000) $2,486 Avg Close $205.54 Range $186.40 - $221.70

Q4 2017

Shares 12,053 Value ($000) $2,288 Avg Close $187.44 Range $177.57 - $196.84

Q3 2017

Shares 12,148 Value ($000) $2,298 Avg Close $177.07 Range $166.25 - $189.94

Q2 2017

Shares 12,148 Value ($000) $2,120 Avg Close $164.09 Range $148.20 - $172.95

Q1 2017

Shares 12,114 Value ($000) $1,861 Avg Close $149.18 Range $136.61 - $157.89

Q4 2016

Shares 12,448 Value ($000) $1,756 Avg Close $143.74 Range $135.56 - $156.06

Q3 2016

Shares 11,138 Value ($000) $1,772 Avg Close $150.09 Range $139.26 - $156.47

Q2 2016

Shares 11,403 Value ($000) $1,685 Avg Close $143.61 Range $136.38 - $150.60

Q1 2016

Shares 11,603 Value ($000) $1,643 Avg Close $130.26 Range $116.37 - $138.34

Q4 2015

Shares 11,341 Value ($000) $1,609 Avg Close $129.50 Range $116.40 - $139.59

Q3 2015

Shares 12,562 Value ($000) $1,536 Avg Close $126.34 Range $113.67 - $136.94

Q2 2015

Shares 12,985 Value ($000) $1,685 Avg Close $126.27 Range $121.29 - $130.90

Q1 2015

Shares 9,635 Value ($000) $1,294 Avg Close $124.72 Range $117.56 - $134.63

Q4 2014

Shares 9,837 Value ($000) $1,233 Avg Close $117.50 Range $103.69 - $125.37

Q3 2014

Shares 10,066 Value ($000) $1,225 Avg Close $117.35 Range $112.28 - $122.75

Q2 2014

Shares 11,506 Value ($000) $1,358 Avg Close $113.45 Range $107.95 - $118.89

Q1 2014

Shares 10,666 Value ($000) $1,283 Avg Close $114.47 Range $105.00 - $122.85

Q4 2013

Shares 8,716 Value ($000) $970 Avg Close $95.60 Range $86.22 - $107.27

Q3 2013

Shares 8,566 Value ($000) $790 Avg Close $86.81 Range $81.00 - $91.06

Q2 2013

Shares 7,390 Value ($000) $625 Avg Close $79.76 Range $72.10 - $85.73

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	89,084	$51,620	$565.16	$486.57 - $601.87
Q3 2025	89,726	$43,519	$464.78	$402.70 - $501.56
Q2 2025	91,114	$36,943	$417.06	$384.82 - $495.18
Q1 2025	91,769	$45,664	$539.78	$482.97 - $608.82
Q4 2024	91,031	$47,357	$547.53	$491.20 - $617.36
Q3 2024	94,277	$58,317	$589.13	$525.78 - $624.81
Q2 2024	93,893	$50,722	$569.75	$526.69 - $598.64
Q1 2024	93,868	$54,557	$557.71	$524.04 - $600.06
Q4 2023	87,637	$46,517	$480.76	$412.73 - $532.66
Q3 2023	87,571	$44,326	$528.90	$491.51 - $575.69
Q2 2023	83,985	$43,819	$535.25	$494.39 - $588.28
Q1 2023	82,343	$47,460	$558.70	$518.14 - $604.43
Q4 2022	81,069	$44,644	$524.96	$471.30 - $579.21
Q3 2022	81,376	$41,274	$554.13	$500.83 - $604.99
Q2 2022	80,618	$43,797	$544.70	$492.89 - $611.86
Q1 2022	78,519	$46,377	$568.16	$508.25 - $656.92
Q4 2021	76,127	$50,795	$617.25	$545.68 - $664.90
Q3 2021	75,825	$43,322	$542.36	$497.26 - $609.86
Q2 2021	73,141	$36,898	$466.00	$433.25 - $504.51
Q1 2021	69,931	$31,916	$471.13	$427.86 - $519.72
Q4 2020	67,923	$31,638	$462.59	$427.16 - $525.38
Q3 2020	67,441	$29,776	$407.40	$352.00 - $438.79
Q2 2020	66,094	$23,949	$330.32	$266.44 - $358.87
Q1 2020	62,800	$17,810	$310.51	$246.54 - $336.98
Q4 2019	60,124	$19,533	$298.40	$266.00 - $325.05
Q3 2019	59,399	$17,301	$281.62	$262.06 - $300.37
Q2 2019	57,644	$16,929	$270.70	$248.84 - $293.42
Q1 2019	55,273	$15,129	$244.42	$206.29 - $269.21
Q4 2018	53,283	$11,924	$230.26	$204.59 - $249.16
Q3 2018	51,428	$12,553	$225.62	$199.95 - $240.42
Q2 2018	47,955	$9,933	$208.02	$195.82 - $217.41
Q1 2018	12,042	$2,486	$205.54	$186.40 - $221.70
Q4 2017	12,053	$2,288	$187.44	$177.57 - $196.84
Q3 2017	12,148	$2,298	$177.07	$166.25 - $189.94
Q2 2017	12,148	$2,120	$164.09	$148.20 - $172.95
Q1 2017	12,114	$1,861	$149.18	$136.61 - $157.89
Q4 2016	12,448	$1,756	$143.74	$135.56 - $156.06
Q3 2016	11,138	$1,772	$150.09	$139.26 - $156.47
Q2 2016	11,403	$1,685	$143.61	$136.38 - $150.60
Q1 2016	11,603	$1,643	$130.26	$116.37 - $138.34
Q4 2015	11,341	$1,609	$129.50	$116.40 - $139.59
Q3 2015	12,562	$1,536	$126.34	$113.67 - $136.94
Q2 2015	12,985	$1,685	$126.27	$121.29 - $130.90
Q1 2015	9,635	$1,294	$124.72	$117.56 - $134.63
Q4 2014	9,837	$1,233	$117.50	$103.69 - $125.37
Q3 2014	10,066	$1,225	$117.35	$112.28 - $122.75
Q2 2014	11,506	$1,358	$113.45	$107.95 - $118.89
Q1 2014	10,666	$1,283	$114.47	$105.00 - $122.85
Q4 2013	8,716	$970	$95.60	$86.22 - $107.27
Q3 2013	8,566	$790	$86.81	$81.00 - $91.06
Q2 2013	7,390	$625	$79.76	$72.10 - $85.73