Question 1

How many shares of AMGN does PRIMECAP MANAGEMENT CO/CA/ own?

Accepted Answer

As of 2026-Q1, PRIMECAP MANAGEMENT CO/CA/ holds 8.9M shares of AMGN (AMGEN INC).

Question 2

What is PRIMECAP MANAGEMENT CO/CA/'s AMGN position worth?

Accepted Answer

As of 2026-Q1, PRIMECAP MANAGEMENT CO/CA/'s AMGN position is worth $3.1B.

Question 3

Is PRIMECAP MANAGEMENT CO/CA/ buying or selling AMGN?

Accepted Answer

In 2026-Q1, PRIMECAP MANAGEMENT CO/CA/ decreased their AMGN position (-0.3% change in shares).

Question 4

When did PRIMECAP MANAGEMENT CO/CA/ first buy AMGN?

Accepted Answer

Based on available 13F filings, PRIMECAP MANAGEMENT CO/CA/ first reported a position in AMGN in 2026-Q1. They have held the position across 30 quarters.