BLGO vs ERII Stock Comparison

Biolargo and Energy Recovery Prices as of Oct 26, 2026 Peers: Industry group
BLGO Biolargo, Inc.
$0.07 -22.2% 1M -56.3% 1Y
Market cap
$22.15M
P/E
–
Revenue (TTM)
$4.08M
Div. yield
–
Water Treatment Industrials
2 wins
ERII Energy Recovery, Inc.
$6.79 -0.3% 1M -62.5% 1Y
Market cap
$352.78M
P/E
23.0x
Revenue (TTM)
$120.57M
Div. yield
–
Water Treatment Industrials
5 wins

Head to Head

7 decided of 12

Energy Recovery leads on 5 of the 12 questions below (Energy Recovery 5, Biolargo 2). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionBLGOERIILeader
Larger companyMarket capitalisation $22.15M $352.78M ERII
Cheaper on earningsLower P/E, profitable companies only -1.5x 23.0x –
Cheaper on forward earningsLower price / next fiscal year consensus EPS — — –
Faster revenue growthRevenue growth, trailing twelve months -70.9% -15.0% ERII
More profitableNet margin, trailing twelve months -354.8% 12.7% ERII
Better return on capitalReturn on invested capital — — –
Less leveragedLower net debt / EBITDA -0.2x — –
Higher dividend yieldTrailing dividend yield 0.00% 0.00% –
Better 1-year returnPrice return, last 12 months -56.3% -62.5% BLGO
Better 5-year returnAnnualised price return, 5 years -16.3%/yr -19.3%/yr BLGO
Less volatileAnnualised volatility, 1 year 91.8% 63.8% ERII
Higher overall scoreMean of the five percentile scores vs peers 11/100 89/100 ERII

Percentile Scorecard

BLGOERII

Each axis is the mean percentile of its metrics against the company's industry group. 100 is the best in the group, 50 the middle.

Scores by Axis

AxisBLGOERII
Valuation 10 #19 of 21 95 #2 of 21
Growth 0 #19 of 19 67 #7 of 19
Profitability 6 #16 of 17 81 #4 of 17
Financial Health 10 #20 of 22 100 #1 of 22
Shareholder Returns 30 #8 of 11 100 #1 of 11
Overall 11 89
  • BLGO ranked among 22 companies in Environmental Equipment
  • ERII ranked among 22 companies in Environmental Equipment

Price Performance

Price return, split-adjusted, before dividends. Click a name to hide or show it.

Returns

PeriodBLGOERIISPY
1 month -22.2%-0.3% -0.8%
3 months -36.4%-20.3% +3.5%
6 months -53.3%-38.6% +7.0%
Year to date -61.1%-49.7% +12.2%
1 year -56.3%-62.5% +13.0%
3 years -56.3%-54.2% +86.3%
3 years, per year -24.1%-23.0% +23.1%
5 years -58.8%-65.7% +68.6%
5 years, per year -16.3%-19.3% +11.0%
10 years -89.9%-46.5% +258.0%
10 years, per year -20.5%-6.1% +13.6%

Risk

MeasureBLGOERIISPY
Volatility, 1Y 91.8%63.8% 12.7%
Downside volatility, 1Y 135.9%82.0% 12.7%
Beta vs S&P 500, 1Y 0.231.70 1.00
Return / volatility, 1Y -0.61-0.98 1.02
Max drawdown, 5Y -82.5%-78.3% -25.4%
From 52-week high -65.0%-61.4% -1.8%
52-week high $0.20$17.59 $779.14
52-week low $0.07$6.64 $631.97

Valuation History

Weekly multiples on trailing twelve-month fundamentals. Negative or extreme readings (a loss year, a collapsed denominator) are left out so the chart stays readable.

MultipleBLGOERII
P/E now vs peer median -1.6xmedian 25.6x 22.8xmedian 25.6x
P/S now vs peer median 5.6xmedian 2.5x 2.9xmedian 2.5x
EV/EBITDA now vs peer median -1.4xmedian 19.1x 14.1xmedian 19.1x
P/FCF now vs peer median -2.2xmedian 25.2x 9.0xmedian 25.2x
P/B now vs peer median -8.4xmedian 2.0x 2.0xmedian 2.0x
PEG now vs peer median —median 1.54 1.36median 1.54

Financial History

Reported figures by fiscal period, placed on the calendar year (or quarter) each period ended in, so companies with different fiscal years line up.

Trailing twelve monthsBLGOERII
Revenue $4.08M $120.57M
Gross profit $1.63M $77.18M
Operating income -$18.12M $14.23M
Net income -$18.79M $15.34M
Free cash flow -$10.56M $38.60M
R&D $3.27M $12.22M
EPS (diluted) – $0.30
Cash & equivalents $2.19M $61.44M
Total debt $4.85M –
Shares (diluted) – 51.46M
Enterprise value $7.41M $27.94M

All Metrics

58 metrics · best in bold

Bold marks the best reading: the lowest positive value for multiples, leverage and payout, the highest for everything else. The bar under each value is its percentile against that company's own peers. Hover a value for its rank and the peer median.

Valuation

12 metrics
MetricBLGOERII
P/E -1.6x 22.8x
P/FCF -2.2x 9.0x
P/Operating cash flow -2.2x 8.4x
P/S 5.6x 2.9x
P/B -8.4x 2.0x
P/Tangible book -8.4x 2.0x
EV/EBITDA -1.4x 14.1x
EV/EBIT -1.4x 17.9x
EV/Revenue 6.3x 2.1x
EV/FCF -2.4x 6.6x
EV/Operating cash flow -2.5x 6.2x
PEG (3Y EPS CAGR) – 1.36

Growth

14 metrics
MetricBLGOERII
Revenue growth (1Y) -70.9% -15.0%
Revenue CAGR (3Y) -22.5% 4.1%
Gross profit growth (1Y) -74.4% -18.5%
Gross profit CAGR (3Y) -27.8% 2.0%
Operating income growth (1Y) -185.8% -34.1%
Operating income CAGR (3Y) -60.3% 17.3%
Net income growth (1Y) -184.9% -36.4%
Net income CAGR (3Y) -62.6% 13.3%
EPS growth (1Y) – -32.7%
EPS CAGR (3Y) – 16.8%
Operating cash flow growth (1Y) -37.9% 98.7%
Operating cash flow CAGR (3Y) -62.1% 62.2%
Free cash flow growth (1Y) -40.8% 91.3%
Free cash flow CAGR (3Y) -57.1% 76.4%

Profitability

14 metrics
MetricBLGOERII
Gross margin 40.0% 64.0%
EBITDA margin -434.2% 15.0%
Operating margin -443.9% 11.8%
Pretax margin -458.1% 14.6%
Net margin -354.8% 12.7%
FCF margin -258.6% 32.0%
Operating cash flow margin -252.8% 34.2%
Return on equity – 8.6%
Return on assets -246.7% 7.5%
Return on invested capital – –
Return on capital employed -635.4% 7.7%
Asset turnover 0.5x 0.6x
Cash conversion (OCF / net income) 0.5x 2.7x
Stock comp / revenue 59.3% 5.9%

Financial Health

11 metrics
MetricBLGOERII
Debt / assets 72.8% –
Debt / equity -1.8x –
Net debt / EBITDA -0.2x –
Debt / FCF -0.5x –
Liabilities / assets 140.9% 12.8%
Equity / assets -40.9% 87.2%
Interest coverage -22.5x –
Current ratio 0.7x 8.1x
Quick ratio 0.6x 5.8x
Cash ratio 0.5x 5.0x
Altman Z-score -42.03 10.70

Shareholder Returns

7 metrics
MetricBLGOERII
Dividend yield – –
Net buyback yield -2.5% 9.9%
Shareholder yield -2.5% 9.9%
Payout ratio (earnings) – –
Payout ratio (FCF) – –
Dividend growth (1Y) – –
Dividend CAGR (3Y) – –

Analyst Estimates

Solid lines are reported fiscal-year results; dashed lines are the consensus for the years ahead. Hover a year for the analysts' high and low, and how each result compared with its estimate.

ConsensusBLGOERII
EPS, next fiscal year $-0.05FY2026 $-0.20FY2026
EPS growth, next FY – -147.6%FY2026
Revenue, next fiscal year $5.48MFY2026 $69.90MFY2026
Revenue growth, next FY -29.4%FY2026 -48.2%FY2026
Revenue growth, the year after +180.2% +45.2%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersBLGOERII
Held by institutions – 85.0%
Institutions holding – 197
Change in shares held, QoQ – -1.1%
Institutions buying – 120
Institutions selling – 45
Buyers to sellers – 2.67

Return Correlation

Daily returns, last 12 months

1.00 means two stocks move in lockstep, 0 that they move independently. Pairs below about 0.5 diversify each other.

BLGOERII
BLGO 1.00 -0.03
ERII -0.03 1.00

Add a Peer

Largest companies in the same industry

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Frequently Asked Questions

Which is bigger, BLGO and ERII?

Energy Recovery (ERII) is the largest by market capitalisation: Biolargo (BLGO) $22.15M, Energy Recovery (ERII) $352.78M.

Which company is growing faster?

Energy Recovery (ERII) grew revenue fastest over the trailing twelve months: Biolargo (BLGO) -70.9%, Energy Recovery (ERII) -15.0%.

Which company is more profitable?

Energy Recovery (ERII) has the highest net margin (Biolargo (BLGO) -354.8%, Energy Recovery (ERII) 12.7%).

Which stock has performed better?

Over the past year Biolargo (BLGO) returned the most: Biolargo (BLGO) -56.3%, Energy Recovery (ERII) -62.5%. Over five years, Biolargo (BLGO) compounded fastest (Biolargo (BLGO) -16.3%/yr, Energy Recovery (ERII) -19.3%/yr). Returns are price only, before dividends.

Which stock is riskier?

By one-year price volatility, Energy Recovery (ERII) has been the steadiest (Biolargo (BLGO) 91.8%, Energy Recovery (ERII) 63.8%). Volatility measures how widely the price swings, not the risk of the business.

Do BLGO and ERII move together?

Their daily returns over the past year have a correlation of -0.03, a negative relationship. Holding both diversifies more than two closely linked stocks would.

Which is the better stock, BLGO and ERII?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, Energy Recovery (ERII) leads on 5. Business Quant does not give investment advice; use the comparison as a starting point for your own research.

Data from SEC filings, exchange prices and consensus estimates, via Business Quant. Percentile scores compare each company with its own peer group, so two companies' scores are each relative to different peers unless you rank against the whole market. Price returns exclude dividends. Nothing on this page is investment advice.