SGML vs RIO vs IONR Stock Comparison

Sigma Lithium, Rio Tinto and Ioneer Prices as of Oct 27, 2026 Peers: Industry group
SGML Sigma Lithium Corp
$8.45 -11.8% 1M +50.4% 1Y
Market cap
$941.36M
P/E
–
Revenue (TTM)
$142.49M
Div. yield
–
Lithium Basic Materials
1 win
RIO Rio Tinto Plc
$85.74 -9.3% 1M +20.9% 1Y
Market cap
$139.16B
P/E
–
Revenue (TTM)
—
Div. yield
5.42%
Iron Ore Basic Materials
4 wins
IONR ioneer Ltd
$2.73 -17.5% 1M -44.2% 1Y
Market cap
$182.54M
P/E
–
Revenue (TTM)
—
Div. yield
–
Lithium Basic Materials

Head to Head

5 decided of 12

Rio Tinto leads on 4 of the 12 questions below (Rio Tinto 4, Sigma Lithium 1). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionSGMLRIOIONRLeader
Larger companyMarket capitalisation $941.36M $139.16B $182.54M RIO
Cheaper on earningsLower P/E, profitable companies only -34.1x — — –
Cheaper on forward earningsLower price / next fiscal year consensus EPS 27.3x 10.9x — 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 7.6x — — –
Higher dividend yieldTrailing dividend yield — 5.42% — –
Better 1-year returnPrice return, last 12 months +50.4% +20.9% -44.2% SGML
Better 5-year returnAnnualised price return, 5 years -0.2%/yr +5.9%/yr — RIO
Less volatileAnnualised volatility, 1 year 111.9% 30.7% 79.3% RIO
Higher overall scoreMean of the five percentile scores vs peers 42/100 — — –

Percentile Scorecard

SGMLRIOIONR

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

AxisSGMLRIOIONR
Valuation 40 #98 of 162 – –
Growth 77 #34 of 147 – –
Profitability 46 #66 of 122 – –
Financial Health 6 #154 of 164 22 #128 of 164 98 #4 of 164
Shareholder Returns – 98 #3 of 107 –
Overall 42 – –
  • SGML ranked among 176 companies in Metals and Mining
  • RIO ranked among 176 companies in Metals and Mining
  • IONR ranked among 176 companies in Metals and Mining

Price Performance

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

Returns

PeriodSGMLRIOIONRSPY
1 month -11.8%-9.3%-17.5% -0.2%
3 months -11.0%-6.4%-13.6% +3.9%
6 months -59.0%-12.9%-30.5% +8.2%
Year to date -35.9%+7.1%-43.1% +12.9%
1 year +50.4%+20.9%-44.2% +12.3%
3 years -69.5%+34.5%-27.0% +87.4%
3 years, per year -32.7%+10.4%-10.0% +23.3%
5 years -1.1%+32.9%— +67.9%
5 years, per year -0.2%+5.9%— +10.9%
10 years —+150.4%— +261.1%
10 years, per year —+9.6%— +13.7%

Risk

MeasureSGMLRIOIONRSPY
Volatility, 1Y 111.9%30.7%79.3% 12.7%
Downside volatility, 1Y 98.8%32.1%76.7% 12.7%
Beta vs S&P 500, 1Y 2.171.281.44 1.00
Return / volatility, 1Y 0.450.68-0.56 0.97
Max drawdown, 5Y -89.9%-39.0%-87.8% -25.4%
From 52-week high -64.3%-23.5%-57.3% -1.2%
52-week high $23.65$112.04$6.39 $779.14
52-week low $4.68$67.89$2.55 $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.

MultipleSGMLRIOIONR
P/E now vs peer median -34.1xmedian 13.3x —median 13.3x —median 13.3x
P/S now vs peer median 6.6xmedian 3.2x —median 3.2x —median 3.2x
EV/EBITDA now vs peer median 41.4xmedian 7.3x —median 7.3x —median 7.3x
P/FCF now vs peer median 38.7xmedian 14.7x —median 14.7x —median 14.7x
P/B now vs peer median 11.4xmedian 2.2x 2.1xmedian 2.2x 0.7xmedian 2.2x
PEG now vs peer median -0.83median 0.31 —median 0.31 —median 0.31

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 monthsSGMLRIOIONR
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 $8.87B $58.84M
Total debt $226.73M $16.90B –
Shares (diluted) 111.31M 1.63B 60.35M
Enterprise value $908.52M $99.67B $48.15M

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
MetricSGMLRIOIONR
P/E -34.1x – –
P/FCF 38.7x – –
P/Operating cash flow 24.9x – –
P/S 6.6x – –
P/B 11.4x 2.1x 0.7x
P/Tangible book 11.4x 2.3x 0.7x
EV/EBITDA 41.4x – –
EV/EBIT 108.0x – –
EV/Revenue 8.1x – –
EV/FCF 47.4x – –
EV/Operating cash flow 30.5x – –
PEG (3Y EPS CAGR) -0.83 – –

Growth

14 metrics
MetricSGMLRIOIONR
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
MetricSGMLRIOIONR
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
MetricSGMLRIOIONR
Debt / assets 47.4% – –
Debt / equity 2.8x 0.3x –
Net debt / EBITDA 7.6x – –
Debt / FCF 9.3x – –
Liabilities / assets 82.8% – 0.9%
Equity / assets 17.2% – 99.1%
Interest coverage – – –
Current ratio 0.3x 1.4x 25.8x
Quick ratio 0.2x 1.0x 25.8x
Cash ratio 0.1x 0.6x 25.6x
Altman Z-score 0.57 – –

Shareholder Returns

7 metrics
MetricSGMLRIOIONR
Dividend yield – 5.4% –
Net buyback yield – – –
Shareholder yield – 5.4% –
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.

ConsensusSGMLRIOIONR
Forward P/E 27.3xFY2026 10.9xFY2026 –
EPS, next fiscal year $0.31FY2026 $7.84FY2026 $0.00FY2026
EPS growth, next FY – +17.2%FY2026 –
EPS growth, the year after +419.4% +9.1% –
Revenue, next fiscal year $174.11MFY2026 $67.58BFY2026 $717.29KFY2026
Revenue growth, next FY +58.3%FY2026 +17.2%FY2026 +9.8%FY2026
Revenue growth, the year after +144.1% -8.0% -100.0%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersSGMLRIOIONR
Held by institutions 33.1% 7.9% 3.9%
Institutions holding 119 968 34
Change in shares held, QoQ +9.7% -1.1% -10.1%
Institutions buying 65 504 20
Institutions selling 40 283 5
Buyers to sellers 1.63 1.78 4.00

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.

SGMLRIOIONR
SGML 1.00 0.42 0.34
RIO 0.42 1.00 0.41
IONR 0.34 0.41 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, SGML, RIO and IONR?

Rio Tinto (RIO) is the largest by market capitalisation: Sigma Lithium (SGML) $941.36M, Rio Tinto (RIO) $139.16B, Ioneer (IONR) $182.54M.

Which stock has performed better?

Over the past year Sigma Lithium (SGML) returned the most: Sigma Lithium (SGML) +50.4%, Rio Tinto (RIO) +20.9%, Ioneer (IONR) -44.2%. Over five years, Rio Tinto (RIO) compounded fastest (Sigma Lithium (SGML) -0.2%/yr, Rio Tinto (RIO) +5.9%/yr). Returns are price only, before dividends.

Which pays a higher dividend?

Only one of these companies pays a dividend: Rio Tinto (RIO) 5.42%. Sigma Lithium (SGML) and Ioneer (IONR) pays no regular dividend.

Which stock is riskier?

By one-year price volatility, Rio Tinto (RIO) has been the steadiest (Sigma Lithium (SGML) 111.9%, Rio Tinto (RIO) 30.7%, Ioneer (IONR) 79.3%). Volatility measures how widely the price swings, not the risk of the business.

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

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 4. 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.