Is SION or SLN more undervalued in 2026?

CirclFi compares Sionna Therapeutics, Inc. (SION) and Silence Therapeutics Plc - Amer (SLN) using 13 institutional-grade valuation models. SION has a Quality of Company score of 4.3/10 while SLN scores 5.4/10.

Which is a better buy — SION or SLN?

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 SION and SLN valuations compare?

SION at $42.82 and SLN at $6.90 are compared across Bayesian DCF, EPV, EROIC Spread, First Chicago, Markov DDM, and 8 additional models.

SION vs SLN Valuation Comparison 2026 — Intrinsic Value Analysis

SION

Pharmaceutical Preparations

Sionna Therapeutics, Inc.

Quality

4.3

out of 10

Value Trap

—

Price

$42.82

Last close

Models

10/13

Active

SLN

Pharmaceutical Preparations

Silence Therapeutics Plc - Amer

Quality

5.4

out of 10

Value Trap

SAFE

Price

$6.90

Last close

Models

10/13

Active

Model-by-Model Comparison

Model	Type	SION Fair Value	SION Upside	SLN Fair Value	SLN Upside
Bayesian DCF	Intrinsic	$7.15	-83.3%	$1.71	-75.2%
Earnings Power Value	Intrinsic	$15.97	-58.1%	$0.80	-88.8%
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	$•••.••	••.•%	$•••.••	••.•%

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SION vs SLN — Which Stock Is More Undervalued?

SLN scores higher with a 5.4/10 quality rating vs SION's 4.3/10. Both stocks are analyzed daily using SEC EDGAR filings across 13 independent models.

Comparing Sionna Therapeutics, Inc. (SION) and Silence Therapeutics Plc - Amer (SLN) 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.

SION currently trades at $42.82 with a QOC of 4.3/10, while SLN trades at $6.90 with a QOC of 5.4/10.

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).