Is KRRO or RLYB more profitable?

RLYB runs the higher net margin — KRRO at -4477.08% versus RLYB at 7051.24%.

How have KRRO and RLYB total returns compared?

Over the past 5 years, KRRO delivered -50.72% and RLYB delivered -35.80% annualized total return. Past performance doesn't predict future results.

Korro Bio, Inc. (KRRO) vs Rallybio Corporation (RLYB)

A side-by-side comparison of Korro Bio, Inc. and Rallybio Corporation across valuation, profitability, dividends, and growth — built entirely from reported fundamentals, as of October 6, 2026. Differences are shown without an overall score or investment verdict.

KRRO

Korro Bio, Inc.

$97M

$9.76HealthcareDelayed quote: Oct 6, 2026, 4:00 PM EDT

RLYB

Rallybio Corporation

$91M

$17.08HealthcareDelayed quote: Oct 6, 2026, 4:00 PM EDT

Total return — KRRO vs RLYB

growth of $100 · dividends reinvested · last 5y

KRRO -97.5% (-52.2%/yr)RLYB -85.0% (-31.6%/yr)RLYB compounded faster over this window

Log scale — wide-divergence pair

KRRO RLYB

KRRO vs RLYB: by the numbers

•KRRO is the larger company ($97M vs $91M market cap).
•RLYB is profitable (7051.24% net margin) while KRRO runs a net loss (-4477.08%).

Metrics side by side

Valuation

Metric	KRRO	RLYB
P/E ratio	N/A	2.19
P/S ratio	40.78	140.31
P/B ratio	0.94	0.96
FCF yield	N/A	29.06%

Profitability

Metric	KRRO	RLYB
Gross margin	33.04%	89.28%
Operating margin	-1366.43%	-3270.86%
Net margin	-4477.08%	7051.24%
ROE	-103.31%	48.20%
ROIC	-50.17%	-24.40%

Growth (annualized)

Metric	KRRO	RLYB
Revenue CAGR (5Y)	-41.67%	N/A
Total return CAGR (5Y)	-50.72%	-35.80%

Frequently asked

Is KRRO or RLYB more profitable?: RLYB runs the higher net margin — KRRO at -4477.08% versus RLYB at 7051.24%.
How have KRRO and RLYB total returns compared?: Over the past 5 years, KRRO delivered -50.72% and RLYB delivered -35.80% annualized total return. Past performance doesn't predict future results.

Go deeper

Full KRRO analysis Full RLYB analysis Interactive comparison tool

Dig into the metrics

Rallybio P/E ratio Korro Bio ROE Rallybio ROE Korro Bio operating margin Rallybio operating margin Korro Bio revenue growth Rallybio revenue growth Korro Bio free cash flow Rallybio free cash flow

Korro Bio & Rallybio appear in these rankings

Highest ROE Stocks Highest FCF Yield Stocks Lowest P/E Ratio Stocks

Figures are sourced from reported fundamentals and the latest end-of-day price. This comparison is informational only and is not investment advice. Past performance does not predict future results. See our methodology. Compiled by TGMCharts Research · data verified October 6, 2026.