Is BIIB or GILD more undervalued in 2026?

CirclFi compares Biogen Inc. (BIIB) and Gilead Sciences, Inc. (GILD) using 13 institutional-grade valuation models. BIIB has a Quality of Company score of 8.4/10 while GILD scores 10.0/10.

Which is a better buy — BIIB or GILD?

Compare intrinsic values from 13 independent models against current market prices. CirclFi also calculates Value Trap scores. This is not financial advice — conduct your own analysis.

How do BIIB and GILD valuations compare?

BIIB at $196.39 and GILD at $136.22 are compared across Bayesian DCF, EPV, EROIC Spread, First Chicago, Markov DDM, and 8 additional models.

BIIB vs GILD Valuation Comparison 2026 — Intrinsic Value Analysis

BIIB

Drug Manufacturers - General

Biogen Inc.

Quality

8.4

out of 10

Value Trap

SAFE

Price

$196.39

Last close

Models

13/13

Active

GILD

Drug Manufacturers - General

Gilead Sciences, Inc.

Quality

10.0

out of 10

Value Trap

SAFE

Price

$136.22

Last close

Models

13/13

Active

Model-by-Model Comparison

Model	Type	BIIB Fair Value	BIIB Upside	GILD Fair Value	GILD Upside
Bayesian DCF	Intrinsic	$139.39	-29.0%	$76.74	-43.7%
Earnings Power Value	Intrinsic	$106.15	-46.0%	$65.99	-51.6%
EROIC Spread	Intrinsic	$•••.••	••.•%	$•••.••	••.•%
First Chicago	Scenario	$•••.••	••.•%	$•••.••	••.•%
Markov DDM	Intrinsic	$•••.••	••.•%	$•••.••	••.•%
ML-RIV	Intrinsic	$•••.••	••.•%	$•••.••	••.•%
Dynamic NAV	Asset-Based	$•••.••	••.•%	$•••.••	••.•%
PWERM	Option-Based	$•••.••	••.•%	$•••.••	••.•%
Regime Cross-Sectional	Relative	$•••.••	••.•%	$•••.••	••.•%
Sentiment SOTP	Hybrid	$•••.••	••.•%	$•••.••	••.•%
CUCE Ensemble	Ensemble	$•••.••	••.•%	$•••.••	••.•%
FTNN Topology	Relative	$•••.••	••.•%	$•••.••	••.•%
RCMH-DCF	Intrinsic	$•••.••	••.•%	$•••.••	••.•%

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BIIB vs GILD — Which Stock Is More Undervalued?

GILD scores higher with a 10.0/10 quality rating vs BIIB's 8.4/10. Both stocks are analyzed daily using SEC EDGAR filings across 13 independent models.

Comparing Biogen Inc. (BIIB) and Gilead Sciences, Inc. (GILD) across 13 institutional-grade valuation models reveals how each company's intrinsic value stacks up against its market price. CirclFi's engine processes SEC EDGAR 10-K and 10-Q filings, FRED macroeconomic data, and GDELT news sentiment to generate independent fair value estimates daily.

BIIB currently trades at $196.39 with a QOC of 8.4/10, while GILD trades at $136.22 with a QOC of 10.0/10.

Both companies are analyzed with models spanning intrinsic (Bayesian DCF, EPV), scenario-based (First Chicago), regime-switching (Markov DDM, RCMH-DCF), machine learning (ML-RIV, FTNN Topology), and ensemble methods (CUCE).