Is RKLB or SIDU more undervalued in 2026?

CirclFi compares Rocket Lab Corporation (RKLB) and Sidus Space, Inc. (SIDU) using 13 institutional-grade valuation models. RKLB has a Quality of Company score of 6.3/10 while SIDU scores 4.5/10.

Which is a better buy — RKLB or SIDU?

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 RKLB and SIDU valuations compare?

RKLB at $148.03 and SIDU at $5.18 are compared across Bayesian DCF, EPV, EROIC Spread, First Chicago, Markov DDM, and 8 additional models.

RKLB vs SIDU Valuation Comparison 2026 — Intrinsic Value Analysis

RKLB

Aerospace & Defense

Rocket Lab Corporation

Quality

6.3

out of 10

Value Trap

LOW

Price

$148.03

Last close

Models

12/13

Active

SIDU

Aerospace & Defense

Sidus Space, Inc.

Quality

4.5

out of 10

Value Trap

SAFE

Price

$5.18

Last close

Models

9/13

Active

Model-by-Model Comparison

Model	Type	RKLB Fair Value	RKLB Upside	SIDU Fair Value	SIDU Upside
Bayesian DCF	Intrinsic	$50.91	-65.6%	$1.57	-69.7%
Earnings Power Value	Intrinsic	$1.60	-98.0%	—	—
EROIC Spread	Intrinsic	$•••.••	••.•%	$•••.••	••.•%
First Chicago	Scenario	$•••.••	••.•%	$•••.••	••.•%
Markov DDM	Intrinsic	$•••.••	••.•%	$•••.••	••.•%
ML-RIV	Intrinsic	$•••.••	••.•%	$•••.••	••.•%
Dynamic NAV	Asset-Based	$2.78	-98.1%	$0.47	-90.9%
PWERM	Option-Based	$•••.••	••.•%	$•••.••	••.•%
Regime Cross-Sectional	Relative	$•••.••	••.•%	$•••.••	••.•%
Sentiment SOTP	Hybrid	$•••.••	••.•%	$•••.••	••.•%
CUCE Ensemble	Ensemble	$•••.••	••.•%	$•••.••	••.•%
FTNN Topology	Relative	$•••.••	••.•%	$•••.••	••.•%

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RKLB vs SIDU — Which Stock Is More Undervalued?

RKLB scores higher with a 6.3/10 quality rating vs SIDU's 4.5/10. Both stocks are analyzed daily using SEC EDGAR filings across 13 independent models.

Comparing Rocket Lab Corporation (RKLB) and Sidus Space, Inc. (SIDU) 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.

RKLB currently trades at $148.03 with a QOC of 6.3/10, while SIDU trades at $5.18 with a QOC of 4.5/10.

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).