What is Regeneron Pharmaceuticals, Inc. (REGN)'s PEG ratio?

Regeneron Pharmaceuticals, Inc. (REGN) has a PEG ratio of 3.50 (Potentially Overvalued), based on a PE ratio of 19.9 and expected EPS growth of 5.7% (5-Year EPS CAGR).

Is REGN undervalued based on its PEG ratio?

A PEG below 1.0 is conventionally read as potentially undervalued, 1.0–2.0 as fairly valued, and above 2.0 as potentially overvalued relative to growth. At 3.50, Regeneron Pharmaceuticals, Inc. (REGN) screens as "Potentially Overvalued". PEG is one signal, not investment advice — see the full DCF fair value at evidinvest.com/valuation/REGN.

Regeneron Pharmaceuticals, Inc. (REGN) PEG Ratio

Potentially Overvalued

PE ratio relative to earnings growth — is the valuation justified?

3.50

PEG Ratio

3.50

Growth Rate Source

Good Data Quality5-Year EPS CAGR

Current Price

$805.93

TTM EPS

$40.43

P/E Ratio

19.93

Growth Rate

5.7%

5-Year EPS CAGR

Sector

Healthcare

Biotechnology

Calculated

8/18/2026

6:27:00 AM

Peer Comparison

Sample Size

3 peers

Industry Median PEG

5.62

25th Percentile

3.67

75th Percentile

8.57

REGN PEG (3.50) vs Industry Median (5.62): 38% discount

Symbol	Company	PEG	P/E	Growth	vs REGN
VRTX	Vertex Pharmaceuticals Incorporated	3.67	30.0	8.2%	+5%
BMRN	BioMarin Pharmaceutical Inc.	5.62	151.3	26.9%	+60%
ILMN	Illumina, Inc.	8.57	36.0	4.2%	+145%

How to Interpret PEG Ratio

PEG < 1.0 — Potentially Undervalued. The stock may be priced below its earnings growth rate, suggesting a potential buying opportunity.

PEG 1.0–2.0 — Fairly Valued. The stock price is roughly in line with its earnings growth. A PEG of 1.0 is often considered "fair value."

PEG > 2.0 — Potentially Overvalued. The stock may be priced above what its earnings growth justifies.

Limitations:PEG ratios are less reliable for financial firms (earnings driven by interest margins), companies with negative/zero earnings growth, and hypergrowth companies (>100% growth) where the ratio may appear misleadingly low. Always use PEG alongside other valuation metrics.

Regeneron Pharmaceuticals, Inc. (REGN) PEG Ratio

Peer Comparison

How to Interpret PEG Ratio

More on REGN

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Regeneron Pharmaceuticals, Inc. (REGN) PEG Ratio

Peer Comparison

How to Interpret PEG Ratio

More on REGN

Compare with peers

Explore