Is SIGA or SION more undervalued in 2026?

CirclFi compares SIGA Technologies Inc. (SIGA) and Sionna Therapeutics, Inc. (SION) using 13 institutional-grade valuation models. SIGA has a Quality of Company score of 10.0/10 while SION scores 4.3/10.

Which is a better buy — SIGA or SION?

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 SIGA and SION valuations compare?

SIGA at $4.68 and SION at $42.82 are compared across Bayesian DCF, EPV, EROIC Spread, First Chicago, Markov DDM, and 8 additional models.

SIGA vs SION Valuation Comparison 2026 — Intrinsic Value Analysis

SIGA

Pharmaceutical Preparations

SIGA Technologies Inc.

Quality

10.0

out of 10

Value Trap

LOW

Price

$4.68

Last close

Models

12/13

Active

SION

Pharmaceutical Preparations

Sionna Therapeutics, Inc.

Quality

4.3

out of 10

Value Trap

—

Price

$42.82

Last close

Models

10/13

Active

Model-by-Model Comparison

Model	Type	SIGA Fair Value	SIGA Upside	SION Fair Value	SION Upside
Bayesian DCF	Intrinsic	$9.98	+113.3%	$7.15	-83.3%
Earnings Power Value	Intrinsic	$4.97	+6.1%	$15.97	-58.1%
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	$•••.••	••.•%	$•••.••	••.•%

🔒

Unlock Full 13-Model Comparison

Access all valuation models for SIGA vs SION — including EROIC Spread, First Chicago, Markov DDM, PWERM, and 7 more.

Access Full Analysis — From $27/mo →

SIGA vs SION — Which Stock Is More Undervalued?

SIGA scores higher with a 10.0/10 quality rating vs SION's 4.3/10. Both stocks are analyzed daily using SEC EDGAR filings across 13 independent models.

Comparing SIGA Technologies Inc. (SIGA) and Sionna Therapeutics, Inc. (SION) 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.

SIGA currently trades at $4.68 with a QOC of 10.0/10, while SION trades at $42.82 with a QOC of 4.3/10.

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).