Amgen Inc.
Amgen Inc. (AMGN) Stock Splits
Forward and reverse split history, cumulative multiple, latest ratio, and share calculator on this tab.
FMP · AMGN · as of Jun 5, 2026
Key split metrics
Latest Split Event
Forward SplitStock Split History
| Date↓ | Ratio | Type | Multiple↕ | Cumulative↕ |
|---|---|---|---|---|
| Nov 22, 1999 | 2-for-1 | Forward | ×2 | ×48 |
| Mar 1, 1999 | 2-for-1 | Forward | ×2 | ×24 |
| Aug 16, 1995 | 2-for-1 | Forward | ×2 | ×12 |
| Sep 11, 1991 | 3-for-1 | Forward | ×3 | ×6 |
| Aug 13, 1990 | 2-for-1 | Forward | ×2 | ×2 |
Stock Split Calculator
If you bought 100 shares purchased of AMGN on Jan 1, 2020 — — how many shares would you hold today after all splits?
This calculator shows how stock splits affected share count only. It does not reflect current market value, dividend payments, or transaction costs. Past splits do not guarantee future performance.
About stock split history & investor guide
Amgen Inc. (AMGN) has split its stock 5 times since its IPO, with a cumulative multiplier of ×48. The most recent split was a 2-for-1 forward split on Nov 22, 1999.
Frequently asked questions
Amgen Inc. (AMGN) has split its stock 5 times. All splits were forward splits. The cumulative multiplier is ×48, meaning 1 share at IPO would equal 48 shares today.