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PRIMECAP MANAGEMENT CO/CA/

Position in TMO — Thermo Fisher Scientific Inc.

CIK 763212 PASADENA, CA

Position in TMO

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$993,831,388
+$19,357,926 QoQ
Shares Held
1,982,271
-0.0% QoQ
Ownership
0.536%
of shares outstanding
% of Portfolio
0.59%
of 13F equity value
Holder Rank
#34
of 2,606 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 99% Shared 0% None 1%

Common Shares in TMO Over Time

Shares Held

Position Value (USD)

Position in Diagnostics & Research

Healthcare · as of Jun 30, 2026

PRIMECAP MANAGEMENT CO/CA/ holds $2,473,876,903 across 9 Diagnostics & Research names. TMO ranks #1 (40.2% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 TMO
Thermo Fisher Scientific Inc.
This page
1,982,271 $993,831,388

All Filings in TMO

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26 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $993,831,388 1,982,271
2026-03-31 $974,473,462 1,982,531
2025-12-31 $1,192,097,849 2,057,292
2025-09-30 $1,117,157,236 2,303,322
2025-06-30 $975,614,608 2,406,192
2025-03-31 $1,153,089,475 2,317,302
2024-12-31 $1,303,254,704 2,505,151
2024-09-30 $1,592,741,665 2,574,877
2024-06-30 $1,474,816,161 2,666,937
2024-03-31 $1,602,719,703 2,757,557
2023-12-31 $1,593,894,428 3,002,872
2023-09-30 $1,531,666,370 3,025,992
2023-06-30 $1,606,002,327 3,078,107
2023-03-31 $2,054,245,504 3,564,109
2022-12-31 $2,014,740,116 3,658,574
2022-09-30 $1,925,829,339 3,797,057
2022-06-30 $2,092,960,122 3,852,452
2022-03-31 $2,325,688,509 3,937,507
2021-12-31 $2,739,088,258 4,105,102
2021-09-30 $2,457,554,284 4,301,462
2021-06-30 $2,208,198,370 4,377,264
2021-03-31 $2,047,856,470 4,487,174
2020-12-31 $2,070,636,634 4,445,525
2020-09-30 $2,030,215,366 4,598,241
2020-06-30 $1,717,651,391 4,740,441
2020-03-31 $1,374,141,543 4,845,351