REGN vs AMGN: which was the better investment?
Regeneron Pharmaceuticals, Inc. against Amgen Inc. on real daily total-return data — every dividend reinvested, from Apr 2, 1991 to Jul 13, 2026.
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Frequently asked questions
Did REGN beat AMGN?
No — measured from Apr 2, 1991 to Jul 13, 2026 with dividends reinvested, AMGN came out ahead: $979,944 versus $316,481 from a $10,000 start. That gap compounds from a 13.9% annual return against 10.3%.
What would $10,000 in REGN be worth today?
$10,000 invested in Regeneron Pharmaceuticals, Inc. (REGN) on Apr 2, 1991 would be worth about $316,481 as of Jul 13, 2026, a total return of 3064.8% (10.3% per year). The same $10,000 in AMGN would be worth $979,944.
Which was riskier — REGN or AMGN?
REGN swung with an annualized volatility of 62.9% and a worst peak-to-trough drop of -91.8%; AMGN ran at 32.9% volatility with a -60.2% maximum drawdown. Risk-adjusted (Sharpe ratio), that is 0.13 for REGN vs 0.36 for AMGN.
What data is this comparison based on?
Daily adjusted closing prices covering Apr 2, 1991 through Jul 13, 2026 — the full period where both assets have price history. Adjusted prices include dividends and splits, so these are total returns. The page refreshes with new market data every day.
Can I change the dates, amounts, or add monthly investing?
Yes — the interactive tool on this page is pre-loaded with REGN vs AMGN. You can set any start and end date, change the starting amount, add monthly contributions, or build a multi-asset portfolio and compare it against any benchmark.