Mariner’s Thermo Fisher Scientific TMO Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2026
Q1
$65.7M Sell
133,642
-20,407
-13% -$11.1M 0.08% 213
2025
Q4
$89.3M Buy
154,049
+2,771
+2% +$1.57M 0.11% 157
2025
Q3
$73.4M Buy
151,278
+2,374
+2% +$1.11M 0.09% 173
2025
Q2
$60.4M Sell
148,904
-188,069
-56% -$78.6M 0.09% 199
2025
Q1
$168M Sell
336,973
-15,005
-4% -$8.13M 0.28% 71
2024
Q4
$183M Buy
351,978
+3,251
+0.9% +$1.79M 0.31% 63
2024
Q3
$216M Sell
348,727
-2,337
-0.7% -$1.38M 0.38% 50
2024
Q2
$194M Buy
351,064
+20,878
+6% +$12M 0.38% 52
2024
Q1
$192M Buy
330,186
+36,191
+12% +$20.3M 0.4% 51
2023
Q4
$156M Sell
293,995
-15,446
-5% -$7.48M 0.37% 57
2023
Q3
$157M Buy
309,441
+14,862
+5% +$7.92M 0.42% 51
2023
Q2
$154M Buy
294,579
+139
+0% +$75K 0.41% 50
2023
Q1
$170M Buy
294,440
+8,374
+3% +$4.72M 0.49% 40
2022
Q4
$158M Buy
286,066
+8,418
+3% +$4.46M 0.51% 39
2022
Q3
$141M Buy
277,648
+24,233
+10% +$13.6M 0.56% 34
2022
Q2
$138M Buy
253,415
+9,234
+4% +$5.08M 0.57% 34
2022
Q1
$144M Buy
244,181
+19,330
+9% +$11.1M 0.54% 36
2021
Q4
$150M Buy
224,851
+76,500
+52% +$47.8M 0.63% 27
2021
Q3
$84.8M Buy
148,351
+8,781
+6% +$4.82M 0.44% 48
2021
Q2
$70.4M Buy
139,570
+14,079
+11% +$6.64M 0.44% 61
2021
Q1
$57.3M Buy
125,491
+11,391
+10% +$5.44M 0.4% 65
2020
Q4
$53.1M Buy
114,100
+10,979
+11% +$5.15M 0.41% 63
2020
Q3
$45.5M Buy
103,121
+6,981
+7% +$2.88M 0.43% 56
2020
Q2
$34.8M Buy
96,140
+9,858
+11% +$3.3M 0.35% 83
2020
Q1
$24.5M Sell
86,282
-1,637
-2% -$516K 0.31% 94
2019
Q4
$28.6M Buy
87,919
+11,084
+14% +$3.36M 0.3% 98
2019
Q3
$22.4M Buy
76,835
+2,272
+3% +$651K 0.27% 102
2019
Q2
$21.9M Sell
74,563
-2,568
-3% -$707K 0.26% 106
2019
Q1
$21.1M Buy
77,131
+2,377
+3% +$592K 0.3% 97
2018
Q4
$16.7M Buy
74,754
+33,266
+80% +$7.8M 0.3% 100
2018
Q3
$10.1M Buy
41,488
+1,788
+5% +$411K 0.26% 94
2018
Q2
$8.22M Buy
39,700
+5,317
+15% +$1.13M 0.23% 100
2018
Q1
$7.1M Sell
34,383
-1,329
-4% -$279K 0.25% 89
2017
Q4
$6.78M Buy
35,712
+3,421
+11% +$655K 0.26% 81
2017
Q3
$6.11M Buy
32,291
+1,840
+6% +$333K 0.28% 69
2017
Q2
$5.31M Sell
30,451
-2,365
-7% -$397K 0.25% 78
2017
Q1
$5.04M Buy
32,816
+45
+0.1% +$6.88K 0.22% 88
2016
Q4
$4.63M Buy
32,771
+4,867
+17% +$718K 0.21% 92
2016
Q3
$4.44M Buy
27,904
+2,709
+11% +$417K 0.21% 90
2016
Q2
$3.72M Buy
25,195
+6,033
+31% +$890K 0.2% 109
2016
Q1
$2.71M Buy
19,162
+2,958
+18% +$396K 0.16% 123
2015
Q4
$2.3M Buy
16,204
+1,883
+13% +$251K 0.15% 132
2015
Q3
$1.75M Buy
14,321
+355
+3% +$46.3K 0.08% 184
2015
Q2
$1.81M Buy
13,966
+4,170
+43% +$544K 0.08% 186
2015
Q1
$1.32M Buy
9,796
+242
+3% +$31.2K 0.11% 157
2014
Q4
$1.2M Buy
9,554
+532
+6% +$64.7K 0.11% 151
2014
Q3
$1.1M Buy
9,022
+5,228
+138% +$636K 0.12% 144
2014
Q2
$448K Buy
3,794
+2,025
+114% +$238K 0.05% 238
2014
Q1
$213K Sell
1,769
-3,971
-69% -$472K 0.03% 300
2013
Q4
$639K Sell
5,740
-205
-3% -$20.4K 0.08% 199
2013
Q3
$548K Buy
+5,945
New +$538K 0.1% 180

Other funds holding TMO

Mariner's TMO Position: Q1 2026 in Review

Mariner reduced its Thermo Fisher Scientific (TMO) stake by 13% in Q1 2026, selling an estimated $11.1M and leaving 133,642 shares worth $65.7M. The position accounts for 0.08% of the portfolio, ranked #213.

Mariner first reported a position in TMO in Q3 2013 and has held it in 51 quarters since. The position peaked at $216M in Q3 2024. 2,587 funds tracked by Wall St. Rank hold TMO as of Q1 2026.

  • Mariner held 133,642 shares of Thermo Fisher Scientific worth $65.7M as of Q1 2026.
  • Mariner sold 20,407 Thermo Fisher Scientific shares in Q1 2026, an estimated $11.1M.
  • Thermo Fisher Scientific made up 0.08% of Mariner's portfolio in Q1 2026, its #213 holding.
  • Mariner first reported a position in Thermo Fisher Scientific in Q3 2013 and has held it in 51 quarters since.
  • Mariner's Thermo Fisher Scientific position peaked at $216M in Q3 2024.
  • 2,587 funds tracked by Wall St. Rank held Thermo Fisher Scientific as of Q1 2026.

Based on Mariner's 13F filing for Q1 2026, filed 13 May 2026.