Mario Gabelli's TMO Position Overview
Mario Gabelli (via Gamco Investors, Inc. Et Al) currently holds 4,646 shares of Thermo Fisher Scientific Inc. (TMO) worth $2.69 M, representing 0.03% of the portfolio. First purchased in 2014-Q4, this long-term strategic position has been held for 45 quarters.
Based on 13F filings since 2013, Mario Gabelli has maintained a long-term strategic position in TMO, representing a significant commitment to this investment thesis. Largest addition occurred in Q1 2016, adding 16,555 shares. Largest reduction occurred in Q1 2022, reducing 11,739 shares.
Analysis based on 13F filings available since 2013 Q2
Mario Gabelli's Thermo Fisher Scientific (TMO) Holding Value Over Time
Track share changes against reported price movement
Quarterly Thermo Fisher Scientific (TMO) Trades by Mario Gabelli
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | -490 | Reduce 9.54% | 4,646 | $579.45 |
| Q3 2025 | -150 | Reduce 2.84% | 5,136 | $485.02 |
| Q2 2025 | +1,372 | Add 35.05% | 5,286 | $405.46 |
| Q1 2025 | -212 | Reduce 5.14% | 3,914 | $497.60 |
| Q4 2024 | -151 | Reduce 3.53% | 4,126 | $520.23 |
| Q3 2024 | -8 | Reduce 0.19% | 4,277 | $618.57 |
| Q2 2024 | +169 | Add 4.11% | 4,285 | $553.00 |
| Q1 2024 | +90 | Add 2.24% | 4,116 | $581.21 |
| Q4 2023 | -9,579 | Reduce 70.41% | 4,026 | $530.79 |
| Q3 2023 | -4,197 | Reduce 23.58% | 13,605 | $506.17 |
| Q2 2023 | +1,539 | Add 9.46% | 17,802 | $521.75 |
| Q1 2023 | -5,404 | Reduce 24.94% | 16,263 | $576.37 |
| Q4 2022 | -3,589 | Reduce 14.21% | 21,667 | $550.69 |
| Q3 2022 | +603 | Add 2.45% | 25,256 | $507.21 |
| Q2 2022 | -262 | Reduce 1.05% | 24,653 | $543.26 |
| Q1 2022 | -11,739 | Reduce 32.03% | 24,915 | $590.65 |
| Q4 2021 | +1,291 | Add 3.65% | 36,654 | $667.24 |
| Q3 2021 | -7,507 | Reduce 17.51% | 35,363 | $571.33 |
| Q2 2021 | +439 | Add 1.03% | 42,870 | $504.48 |
| Q1 2021 | -3,632 | Reduce 7.88% | 42,431 | $456.39 |
| Q4 2020 | -7,614 | Reduce 14.18% | 46,063 | $465.78 |
| Q3 2020 | +2,225 | Add 4.32% | 53,677 | $441.51 |
| Q2 2020 | -2,485 | Reduce 4.61% | 51,452 | $362.34 |
| Q1 2020 | +2,186 | Add 4.22% | 53,937 | $283.61 |
| Q4 2019 | -290 | Reduce 0.56% | 51,751 | $324.86 |
| Q3 2019 | +2,187 | Add 4.39% | 52,041 | $291.27 |
| Q2 2019 | -587 | Reduce 1.16% | 49,854 | $293.68 |
| Q1 2019 | +4,237 | Add 9.17% | 50,441 | $273.73 |
| Q4 2018 | +25 | Add 0.05% | 46,204 | $223.79 |
| Q3 2018 | +1,883 | Add 4.25% | 46,179 | $244.07 |
| Q2 2018 | -263 | Reduce 0.59% | 44,296 | $207.13 |
| Q1 2018 | -716 | Reduce 1.58% | 44,559 | $206.47 |
| Q4 2017 | -3,755 | Reduce 7.66% | 45,275 | $189.88 |
| Q3 2017 | +6,065 | Add 14.12% | 49,030 | $189.19 |
| Q2 2017 | +14,140 | Add 49.05% | 42,965 | $174.47 |
| Q1 2017 | -395 | Reduce 1.35% | 28,825 | $153.62 |
| Q4 2016 | +1,875 | Add 6.86% | 29,220 | $141.10 |
| Q3 2016 | -5,200 | Reduce 15.98% | 27,345 | $159.04 |
| Q2 2016 | -175 | Reduce 0.53% | 32,545 | $147.76 |
| Q1 2016 | +16,555 | Add 102.41% | 32,720 | $141.60 |
| Q4 2015 | -285 | Reduce 1.73% | 16,165 | $141.85 |
| Q3 2015 | -10,000 | Reduce 37.81% | 16,450 | $122.31 |
| Q2 2015 | +3,135 | Add 13.45% | 26,450 | $129.75 |
| Q1 2015 | +10,315 | Add 79.35% | 23,315 | $134.33 |
| Q4 2014 | +13,000 | New Buy | 13,000 | $125.31 |
Mario Gabelli's Thermo Fisher Scientific Investment FAQs
Mario Gabelli first purchased Thermo Fisher Scientific Inc. (TMO) in Q4 2014, acquiring 13,000 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Mario Gabelli has held Thermo Fisher Scientific Inc. (TMO) for 45 quarters since Q4 2014.
Mario Gabelli's largest addition to Thermo Fisher Scientific Inc. (TMO) was in Q1 2016, adding 32,720 shares worth $4.63 M.
According to the latest 13F filing for Q4 2025, Mario Gabelli's firm, Gamco Investors, Inc. Et Al, owns 4,646 shares of Thermo Fisher Scientific Inc. (TMO), valued at approximately $2.69 M.
As of the Q4 2025 filing, Thermo Fisher Scientific Inc. (TMO) represents approximately 0.03% of Mario Gabelli's publicly disclosed stock portfolio, making it one of their key holdings.
Mario Gabelli's peak holding in Thermo Fisher Scientific Inc. (TMO) was 53,937 shares, as reported at the end of Q1 2020.