Is APT or BLDR more undervalued in 2026?

CirclFi compares Alpha Pro Tech, Ltd. (APT) and Builders FirstSource, Inc. (BLDR) using 13 institutional-grade valuation models. APT has a Quality of Company score of 7.4/10 while BLDR scores 8.0/10.

Which is a better buy — APT or BLDR?

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 APT and BLDR valuations compare?

APT at $5.73 and BLDR at $76.72 are compared across Bayesian DCF, EPV, EROIC Spread, First Chicago, Markov DDM, and 8 additional models.

APT vs BLDR Valuation Comparison 2026 — Intrinsic Value Analysis

APT

Building Products & Equipment

Alpha Pro Tech, Ltd.

Quality

7.4

out of 10

Value Trap

SAFE

Price

$5.73

Last close

Models

13/13

Active

BLDR

Building Products & Equipment

Builders FirstSource, Inc.

Quality

8.0

out of 10

Value Trap

LOW

Price

$76.72

Last close

Models

12/13

Active

Model-by-Model Comparison

Model	Type	APT Fair Value	APT Upside	BLDR Fair Value	BLDR Upside
Bayesian DCF	Intrinsic	$4.17	-27.2%	$160.04	+108.6%
Earnings Power Value	Intrinsic	$2.45	-57.3%	$37.71	-50.8%
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	$•••.••	••.•%	$•••.••	••.•%
RCMH-DCF	Intrinsic	$•••.••	••.•%	$•••.••	••.•%

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APT vs BLDR — Which Stock Is More Undervalued?

BLDR scores higher with a 8.0/10 quality rating vs APT's 7.4/10. Both stocks are analyzed daily using SEC EDGAR filings across 13 independent models.

Comparing Alpha Pro Tech, Ltd. (APT) and Builders FirstSource, Inc. (BLDR) 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.

APT currently trades at $5.73 with a QOC of 7.4/10, while BLDR trades at $76.72 with a QOC of 8.0/10.

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).