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WESTFIELD CAPITAL MANAGEMENT CO LP

Position in TMO — Thermo Fisher Scientific Inc.

CIK 1177719 BOSTON, MA

Position in TMO

as of Jun 30, 2026 · filed Aug 12, 2026
Position Value
$7,126,331
+$503,456 QoQ
Shares Held
14,214
+5.5% QoQ
Ownership
0.004%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
#741
of 2,617 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 97% Shared 0% None 3%

Common Shares in TMO Over Time

Shares Held

Position Value (USD)

Position in Diagnostics & Research

Healthcare · as of Jun 30, 2026

WESTFIELD CAPITAL MANAGEMENT CO LP holds $584,012,441 across 7 Diagnostics & Research names. TMO ranks #5 (1.2% of the industry book) .

# Ticker Company Shares Value (USD) Open
5 TMO
Thermo Fisher Scientific Inc.
This page
14,214 $7,126,331

All Filings in TMO

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26 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $7,126,331 14,214
2026-03-31 $6,622,875 13,474
2025-12-31 $7,927,455 13,681
2025-09-30 $6,635,558 13,681
2025-06-30 $5,524,797 13,626
2025-03-31 $7,133,096 14,335
2024-12-31 $7,735,299 14,869
2024-09-30 $10,498,370 16,972
2024-06-30 $10,017,042 18,114
2024-03-31 $10,249,057 17,634
2023-12-31 $10,117,918 19,062
2023-09-30 $10,873,037 21,481
2023-06-30 $25,363,832 48,613
2023-03-31 $86,461,263 150,010
2022-12-31 $104,317,206 189,430
2022-09-30 $99,399,096 195,980
2022-06-30 $107,930,177 198,664
2022-03-31 $122,051,325 206,639
2021-12-31 $125,993,594 188,828
2021-09-30 $133,002,196 232,794
2021-06-30 $176,275,943 349,428
2021-03-31 $164,538,681 360,530
2020-12-31 $166,375,684 357,198
2020-09-30 $187,859,695 425,484
2020-06-30 $164,714,691 454,586
2020-03-31 $130,161,339 458,961