Is SIDU or SPOK more undervalued in 2026?

CirclFi compares Sidus Space, Inc. (SIDU) and Spok Holdings, Inc. (SPOK) using 13 institutional-grade valuation models. SIDU has a Quality of Company score of 4.5/10 while SPOK scores 8.9/10.

Which is a better buy — SIDU or SPOK?

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 SIDU and SPOK valuations compare?

SIDU at $4.91 and SPOK at $10.59 are compared across Bayesian DCF, EPV, EROIC Spread, First Chicago, Markov DDM, and 8 additional models.

SIDU vs SPOK Valuation Comparison 2026 — Intrinsic Value Analysis

SIDU

Radiotelephone Communications

Sidus Space, Inc.

Quality

4.5

out of 10

Value Trap

SAFE

Price

$4.91

Last close

Models

9/13

Active

SPOK

Radiotelephone Communications

Spok Holdings, Inc.

Quality

8.9

out of 10

Value Trap

SAFE

Price

$10.59

Last close

Models

12/13

Active

Model-by-Model Comparison

Model	Type	SIDU Fair Value	SIDU Upside	SPOK Fair Value	SPOK Upside
Bayesian DCF	Intrinsic	$1.25	-74.5%	$8.24	-22.2%
Earnings Power Value	Intrinsic	—	—	$3.78	-64.3%
EROIC Spread	Intrinsic	$•••.••	••.•%	$•••.••	••.•%
First Chicago	Scenario	$•••.••	••.•%	$•••.••	••.•%
ML-RIV	Intrinsic	$•••.••	••.•%	$•••.••	••.•%
Dynamic NAV	Asset-Based	$0.47	-90.4%	$1.76	-83.3%
PWERM	Option-Based	$•••.••	••.•%	$•••.••	••.•%
Regime Cross-Sectional	Relative	$•••.••	••.•%	$•••.••	••.•%
Sentiment SOTP	Hybrid	$•••.••	••.•%	$•••.••	••.•%
CUCE Ensemble	Ensemble	$•••.••	••.•%	$•••.••	••.•%
FTNN Topology	Relative	$•••.••	••.•%	$•••.••	••.•%
RCMH-DCF	Intrinsic	$•••.••	••.•%	$•••.••	••.•%

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SIDU vs SPOK — Which Stock Is More Undervalued?

SPOK scores higher with a 8.9/10 quality rating vs SIDU's 4.5/10. Both stocks are analyzed daily using SEC EDGAR filings across 13 independent models.

Comparing Sidus Space, Inc. (SIDU) and Spok Holdings, Inc. (SPOK) 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.

SIDU currently trades at $4.91 with a QOC of 4.5/10, while SPOK trades at $10.59 with a QOC of 8.9/10.

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).