SEC 13F Intelligence

Primecap Management Co/Ca/ / TMO

Primecap Management Co/Ca/’s Thermo Fisher Scientific Inc Position

Does Primecap Management Co/Ca/ own Thermo Fisher Scientific Inc (TMO)? Yes — 1.98M shares worth $974M (+0.77% of its 13F portfolio) as of Q1 2026, down from 2.06M shares the prior filed quarter.

Position Value
$974M
Q1 2026
Shares
1.98M
% of Portfolio
+0.77%
Quarters Held
30
currently held

Position History TMO

Reported value by quarter
Q4 ’18: $1.1BQ4 ’18Q1 ’19: $1.4BQ2 ’19: $1.5BQ3 ’19: $1.4BQ4 ’19: $1.5BQ4 ’19Q1 ’20: $1.4BQ2 ’20: $1.7BQ3 ’20: $2.0BQ4 ’20: $2.1BQ4 ’20Q1 ’21: $2.0BQ2 ’21: $2.2BQ3 ’21: $2.5BQ4 ’21: $2.7BQ4 ’21Q1 ’22: $2.3BQ2 ’22: $2.1BQ3 ’22: $1.9BQ4 ’22: $2.0BQ4 ’22Q1 ’23: $2.1BQ2 ’23: $1.6BQ3 ’23: $1.5BQ4 ’23: $1.6BQ4 ’23Q1 ’24: $1.6BQ2 ’24: $1.5BQ3 ’24: $1.6BQ4 ’24: $1.3BQ4 ’24Q1 ’25: $1.2BQ2 ’25: $976MQ3 ’25: $1.1BQ4 ’25: $1.2BQ4 ’25Q1 ’26: $974Mfilingsflow.com
QuarterSharesValue% of Portfolio
Q1 20261.98M$974M+0.77%
Q4 20252.06M$1.2B+0.90%
Q3 20252.30M$1.1B+0.86%
Q2 20252.41M$976M+0.77%
Q1 20252.32M$1.2B+0.95%
Q4 20242.51M$1.3B+1.01%
Q3 20242.57M$1.6B+1.17%
Q2 20242.67M$1.5B+1.07%
Q1 20242.76M$1.6B+1.20%
Q4 20233.00M$1.6B+1.26%
Q3 20233.03M$1.5B+1.29%
Q2 20233.08M$1.6B+1.34%
Q1 20233.56M$2.1B+1.79%
Q4 20223.66M$2.0B+1.84%
Q3 20223.80M$1.9B+1.86%
Q2 20223.85M$2.1B+1.87%
Q1 20223.94M$2.3B+1.75%
Q4 20214.11M$2.7B+1.90%
Q3 20214.30M$2.5B+1.73%
Q2 20214.38M$2.2B+1.48%
Q1 20214.49M$2.0B+1.43%
Q4 20204.45M$2.1B+1.54%
Q3 20204.60M$2.0B+1.67%
Q2 20204.74M$1.7B+1.47%
Q1 20204.85M$1.4B+1.35%
Q4 20194.75M$1.5B+1.12%
Q3 20194.76M$1.4B+1.11%
Q2 20194.97M$1.5B+1.08%
Q1 20195.02M$1.4B+1.01%
Q4 20185.02M$1.1B+0.91%

Common-stock position only; options are excluded. Quarters where the fund filed no 13F or reported no position are absent. See Primecap Management Co/Ca/’s full portfolio or all institutional holders of TMO.