SGML vs IONR vs RIO Stock Comparison

Sigma Lithium, Ioneer and Rio Tinto Prices as of Nov 4, 2026 Peers: Industry group
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SGML Sigma Lithium Corp
$5.62 -41.2% 1M +20.1% 1Y
Market cap
$608.88M
P/E
–
Revenue (TTM)
$142.49M
Div. yield
–
Lithium Basic Materials
IONR ioneer Ltd
$2.68 -10.1% 1M -34.3% 1Y
Market cap
$150.30M
P/E
–
Revenue (TTM)
—
Div. yield
–
Lithium Basic Materials
RIO Rio Tinto Plc
$84.56 -11.6% 1M +24.6% 1Y
Market cap
$137.00B
P/E
–
Revenue (TTM)
—
Div. yield
–
Iron Ore Basic Materials
5 wins

Head to Head

5 decided of 12

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

QuestionSGMLIONRRIOLeader
Larger companyMarket capitalisation $608.88M $150.30M $137.00B RIO
Cheaper on earningsLower P/E, profitable companies only -22.1x — — –
Cheaper on forward earningsLower price / next fiscal year consensus EPS 18.1x — 10.8x RIO
Faster revenue growthRevenue growth, trailing twelve months +7.3% — — –
More profitableNet margin, trailing twelve months -19.3% — — –
Better return on capitalReturn on invested capital 0.0% — — –
Less leveragedLower net debt / EBITDA 0.2x — — –
Higher dividend yieldTrailing dividend yield 0.00% 0.00% 0.00% –
Better 1-year returnPrice return, last 12 months +20.1% -34.3% +24.6% RIO
Better 5-year returnAnnualised price return, 5 years -9.6%/yr — +6.9%/yr RIO
Less volatileAnnualised volatility, 1 year 113.7% 78.6% 30.9% RIO
Higher overall scoreMean of the five percentile scores vs peers 50/100 — — –

Percentile Scorecard

SGMLIONRRIO

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

AxisSGMLIONRRIO
Valuation 52 #82 of 168 – –
Growth 78 #34 of 152 – –
Profitability 48 #65 of 123 – –
Financial Health 21 #130 of 165 100 #1 of 165 26 #123 of 165
Shareholder Returns – – 98 #3 of 117
Overall 50 – –
  • SGML ranked among 177 companies in Metals and Mining
  • IONR ranked among 177 companies in Metals and Mining
  • RIO ranked among 177 companies in Metals and Mining

Price Performance

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

Returns

PeriodSGMLIONRRIOSPY
1 month -41.2%-10.1%-11.6% -1.0%
3 months -46.7%-24.3%-16.7% -0.4%
6 months -75.4%-33.8%-19.9% +4.5%
Year to date -57.4%-44.2%+5.7% +12.4%
1 year +20.1%-34.3%+24.6% +13.6%
3 years -78.3%-42.2%+27.5% +76.4%
3 years, per year -39.9%-16.7%+8.5% +20.8%
5 years -39.7%—+39.5% +63.7%
5 years, per year -9.6%—+6.9% +10.4%
10 years ——+149.2% +267.7%
10 years, per year ——+9.6% +13.9%

Risk

MeasureSGMLIONRRIOSPY
Volatility, 1Y 113.7%78.6%30.9% 12.8%
Downside volatility, 1Y 102.8%75.4%32.2% 12.7%
Beta vs S&P 500, 1Y 2.341.401.27 1.00
Return / volatility, 1Y 0.18-0.440.80 1.06
Max drawdown, 5Y -89.9%-87.8%-39.0% -25.4%
From 52-week high -76.2%-58.1%-24.5% -1.6%
52-week high $23.65$6.39$112.04 $779.14
52-week low $4.68$2.55$67.89 $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.

MultipleSGMLIONRRIO
P/E now vs peer median -22.7xmedian 13.4x —median 13.4x —median 13.4x
P/S now vs peer median 4.4xmedian 3.0x —median 3.0x —median 3.0x
EV/EBITDA now vs peer median 22.7xmedian 7.7x —median 7.7x —median 7.7x
P/FCF now vs peer median 25.8xmedian 13.3x —median 13.3x —median 13.3x
P/B now vs peer median 7.6xmedian 2.3x 0.6xmedian 2.3x 1.9xmedian 2.3x
PEG now vs peer median -0.55median 0.19 —median 0.19 —median 0.19

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 monthsSGMLIONRRIO
Revenue $142.49M – –
Gross profit $70.02M – –
Operating income $10.66M – –
Net income -$27.56M – –
Free cash flow $24.30M – –
EPS (diluted) $-0.25 – –
Cash & equivalents $16.66M $58.84M $8.91B
Total debt $21.45M – $21.82B
Shares (diluted) 111.31M 60.35M 1.63B
Enterprise value $576.05M $15.90M $97.82B

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
MetricSGMLIONRRIO
P/E -22.7x – –
P/FCF 25.8x – –
P/Operating cash flow 16.6x – –
P/S 4.4x – –
P/B 7.6x 0.6x 1.9x
P/Tangible book 7.6x 0.6x 2.1x
EV/EBITDA 22.7x – –
EV/EBIT 59.2x – –
EV/Revenue 4.4x – –
EV/FCF 26.0x – –
EV/Operating cash flow 16.7x – –
PEG (3Y EPS CAGR) -0.55 – –

Growth

14 metrics
MetricSGMLIONRRIO
Revenue growth (1Y) 7.3% – –
Revenue CAGR (3Y) – – –
Gross profit growth (1Y) 130.5% – –
Gross profit CAGR (3Y) – – –
Operating income growth (1Y) 40.5% – –
Operating income CAGR (3Y) – – –
Net income growth (1Y) 42.1% – –
Net income CAGR (3Y) 39.5% – –
EPS growth (1Y) 42.6% – –
EPS CAGR (3Y) 41.0% – –
Operating cash flow growth (1Y) 148.2% – –
Operating cash flow CAGR (3Y) 41.2% – –
Free cash flow growth (1Y) 14,876% – –
Free cash flow CAGR (3Y) 30.3% – –

Profitability

14 metrics
MetricSGMLIONRRIO
Gross margin 49.1% – –
EBITDA margin 19.5% – –
Operating margin 7.5% – –
Pretax margin -6.9% – –
Net margin -19.3% – –
FCF margin 17.1% – –
Operating cash flow margin 26.5% – –
Return on equity -17.5% – –
Return on assets -3.4% – –
Return on invested capital 0.0% – –
Return on capital employed 7.9% – –
Asset turnover 0.4x – –
Cash conversion (OCF / net income) -1.4x – –
Stock comp / revenue 7.8% – –

Financial Health

11 metrics
MetricSGMLIONRRIO
Debt / assets 4.5% – 16.3%
Debt / equity 0.3x – 0.3x
Net debt / EBITDA 0.2x – –
Debt / FCF 0.9x – –
Liabilities / assets 82.8% 0.9% 46.3%
Equity / assets 17.2% 99.1% 53.7%
Interest coverage – – –
Current ratio 0.3x 25.8x 1.4x
Quick ratio 0.2x 25.8x 1.2x
Cash ratio 0.1x 25.6x 0.6x
Altman Z-score 0.09 – –

Shareholder Returns

7 metrics
MetricSGMLIONRRIO
Dividend yield – – 5.5%
Net buyback yield – – –
Shareholder yield – – 5.5%
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.

ConsensusSGMLIONRRIO
Forward P/E 18.1xFY2026 – 10.8xFY2026
EPS, next fiscal year $0.31FY2026 $0.00FY2026 $7.84FY2026
EPS growth, next FY – – +17.2%FY2026
EPS growth, the year after +419.4% – +9.1%
Revenue, next fiscal year $174.11MFY2026 $717.29KFY2026 $67.58BFY2026
Revenue growth, next FY +58.3%FY2026 +9.8%FY2026 +17.2%FY2026
Revenue growth, the year after +144.1% -100.0% -8.0%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersSGMLIONRRIO
Held by institutions 33.1% 3.9% 7.9%
Institutions holding 119 34 969
Change in shares held, QoQ +9.7% -10.1% -1.1%
Institutions buying 65 20 504
Institutions selling 40 5 284
Buyers to sellers 1.63 4.00 1.77

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.

SGMLIONRRIO
SGML 1.00 0.31 0.39
IONR 0.31 1.00 0.40
RIO 0.39 0.40 1.00

Add a Peer

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Frequently Asked Questions

Which is bigger, SGML, IONR and RIO?

Rio Tinto (RIO) is the largest by market capitalisation: Sigma Lithium (SGML) $608.88M, Ioneer (IONR) $150.30M, Rio Tinto (RIO) $137.00B.

Which stock has performed better?

Over the past year Rio Tinto (RIO) returned the most: Sigma Lithium (SGML) +20.1%, Ioneer (IONR) -34.3%, Rio Tinto (RIO) +24.6%. Over five years, Rio Tinto (RIO) compounded fastest (Sigma Lithium (SGML) -9.6%/yr, Rio Tinto (RIO) +6.9%/yr). Returns are price only, before dividends.

Which stock is riskier?

By one-year price volatility, Rio Tinto (RIO) has been the steadiest (Sigma Lithium (SGML) 113.7%, Ioneer (IONR) 78.6%, Rio Tinto (RIO) 30.9%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, SGML, IONR and RIO?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, Rio Tinto (RIO) 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.