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Main Street Research LLC

Position in TMO — Thermo Fisher Scientific Inc.

CIK 1513211 SAUSALITO, CA

Position in TMO

as of Jun 30, 2026 · filed Jul 29, 2026
Position Value
$401,088
-$41,289 QoQ
Shares Held
800
-11.1% QoQ
Ownership
0.000%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
#1,887
of 2,617 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in TMO Over Time

Shares Held

Position Value (USD)

Position in Diagnostics & Research

Healthcare · as of Jun 30, 2026

Main Street Research LLC holds $716,952 across 2 Diagnostics & Research names. TMO ranks #1 (55.9% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 TMO
Thermo Fisher Scientific Inc.
This page
800 $401,088

All Filings in TMO

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26 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $401,088 800
2026-03-31 $442,377 900
2025-12-31 $666,946 1,151
2025-09-30 $483,079 996
2025-06-30 $372,212 918
2025-03-31 $623,990 1,254
2024-12-31 $860,460 1,654
2024-09-30 $1,062,703 1,718
2024-06-30 $859,915 1,555
2024-03-31 $932,842 1,605
2023-12-31 $754,783 1,422
2023-09-30 $609,428 1,204
2023-06-30 $653,752 1,253
2023-03-31 $725,649 1,259
2022-12-31 $730,214 1,326
2022-09-30 $695,864 1,372
2022-06-30 $699,201 1,287
2022-03-31 $807,418 1,367
2021-12-31 $914,118 1,370
2021-09-30 $831,285 1,455
2021-06-30 $711,807 1,411
2021-03-31 $675,898 1,481
2020-12-31 $669,791 1,438
2020-09-30 $604,440 1,369
2020-06-30 $506,551 1,398
2020-03-31 $482,403 1,701