Cosan S.A. share price

Cosan S.A.'s share price was $2.80 at the close on 17 September 2026. It has been falling for 29 weeks. That is 24.7% below its average price over the last 200 trading days. In the last 52 weeks it traded between $3 and $6, and at that close it sat 9% of the way up from that low.

A share price tends to move through four phases: moving sideways (stage 1), rising (stage 2), stalling near a high (stage 3) and falling (stage 4). Today Cosan S.A. is in stage 4. The phase helps read everything below.

Over the past 13 weeks it has done better than the S&P 500, and it has stayed ahead for 2 weeks in a row.

Over the last 5.5 years the share price moved −83% while the S&P 500 moved +93%, so it is behind the index over that whole period. The chart above shows the 13-week comparison for every week.

This page treats a rise as over when the price closes below its 200-day average on two Fridays in a row.

Cosan S.A. declared ₹0.45 per local share for Mar 2024. It reports in its home currency, and one US-listed share can stand for several local shares, so we do not set this against the dollar price or show a yield.

Cosan S.A. is not in the Nasdaq 100, the S&P 500 or the Dow Jones 30, and is not on the US tech stocks list.

Cosan S.A. posted a net loss of ₹1.3 B in the Mar 2026 quarter. The full FY25 year was a loss of ₹10.2 B. That loss is 14.9% of the quarter's revenue. The same quarter a year earlier lost ₹1.9 B. 8 of the last 12 reported quarters were loss-making.

Net profit is what is left after every cost, interest and tax. Earnings per share, dividends and book value all grow from it.

This company reports in its home currency, not US dollars, so the money charts are left out here. The figures in the text are in that currency (₹); nothing is converted.

Cosan S.A. reported ₹9.0 B of revenue in the Mar 2026 quarter, −6.6% on the same quarter a year earlier. Over 4 years it has grown 11.6% a year on average. The last full year, FY25, came in at ₹40.4 B. The last four reported quarters add to ₹39.8 B.

Revenue is everything the company billed its customers in the period.

FY25 revenue was ₹40.4 B, −8.0% on the year before.

Recent pace: the last four quarters grew −8.8% on average, against 11.6% a year over the longer run, so this year is growing slower than its own long-run rate.

Is growth speeding up? Revenue over the last 12 months grew −9.1%, against +0.1% a year over the last 8 quarters (rolling over).

This company reports in its home currency, not US dollars, so the money charts are left out here. The figures in the text are in that currency (₹); nothing is converted.

Cosan S.A.'s operating margin was 23.8% in the Mar 2026 quarter, 1.7 percentage points higher than the same quarter a year ago. Across 5 years it has been between 15.7% and 27.8%. The latest quarter is within that range.

Operating margin is what is left from every ₹100 of sales after the costs of running the business, before interest and tax. It shows pricing power and cost control.

Why the margin moved: operating margin changed +1.7 percentage points on the year while gross margin changed +4.4 points. So the gain came mostly from the gross margin, which means input costs and prices charged.

Over the last 3 years, 177% of Cosan S.A.'s reported profit came in as cash from its operations, so the profit is backed by cash. In FY25 it brought in ₹13.0 B of operating cash against −₹10.2 B of profit. After ₹8.5 B of spending on assets, ₹4.6 B was left over as free cash.

The profit and loss account shows what was earned. The cash-flow statement shows the cash that actually came in. Comparing operating cash flow with profit is one of the best checks that a profit is real.

Cash-flow figures here are yearly, because quarterly cash statements are not published, so this section changes once a year.

Why: the cash figure is clear, but the day counts behind it are not in our data, so we show it without guessing the reason.

What to look at next: the main use of cash is spending on assets. The next section checks what that spending is building.

This company reports in its home currency, not US dollars, so the money charts are left out here. The figures in the text are in that currency (₹); nothing is converted.

Cosan S.A. does not report the customer, stock and supplier day counts a cash cycle needs, so this section looks at its spending on assets instead. It spent ₹23.0 B on assets over the last 3 years. Averaged over those years that is 19.0% of FY25 revenue a year.

Working capital is the cash tied up between paying suppliers and getting paid. Debtor days: how long customers take to pay. Inventory days: how long stock sits. The cash cycle: the whole loop, in days of sales.

Nothing is estimated in place of the missing day counts, so no cash-cycle chart is drawn.

Spending on assets: ₹23.0 B over the last 3 years.

In short: the cash is going into new capacity, not getting stuck in the daily cycle. The question is whether the new capacity earns.

This company reports in its home currency, not US dollars, so the money charts are left out here. The figures in the text are in that currency (₹); nothing is converted.

Cosan S.A. has no P/E right now, because its earnings are negative. The revenue and margin sections are where a turn would show first. The P/E comes back here once profit turns positive.

P/E is the share price divided by a year's profit per share: how many rupees the market pays for each rupee of yearly profit.

Cosan S.A.'s business is getting worse. Revenue and profit growth are shrinking: revenue growth is −9.1% in the latest quarter, against +34.8% at its best in 12 quarters, with ROE falling at -32.9%. This is based on 12 quarters of 3 measures, with some gaps.

Every business is somewhere on a path of getting better or worse, and this section names where. The last 12 quarters of growth in revenue, profit and earnings per share, plus the return the business earns on its capital, are read as lines. Getting worse: the lines are falling. Turning around: a low point has just formed and the last few quarters are rising from it. Getting better: the rise from the low has lasted. Growing steadily: steady growth with healthy returns. Slowing from a peak: still high, but slowing. When the lines disagree the result is mixed; too little history means no reading. CAGR (compound annual growth rate) is the steady yearly rate that would turn the starting value into the latest one. It is the fairest way to compare growth over different periods. If the 1-year figure is much bigger than the 10-year one, recent growth is running faster than the long-run trend. A dash means there is no figure for that period, or the starting year was a loss, where a growth rate means nothing.

Why it matters: falling lines mean any ratio below that looks low should be read with that direction in mind.

The return figures here are yearly, not quarterly. They show level and direction only; they can support the growth lines but never decide the reading alone.

This reading has some gaps: at least one line is short, or the return line is not the quarterly series, so treat it with a little more caution.

Compound annual growth rate (%)

Compound annual growth rate over each period, %. Revenue, profit and EPS come from yearly figures; the stock price row is price growth over the same periods. A dash means no figure for that period, or the starting year was a loss.

Cosan S.A. earned a ROE of −33% in FY25. Its return on capital used (ROIC) is left out: on sales this small it reads −49%, a number that says nothing useful about the business. It comes from a −25.2% net margin and 0.30× asset turnover (sales divided by assets).

Return on equity (ROE) is the profit the business earns on its shareholders’ money. We do not have the full capital split, so ROE is the longest history we can draw here.

Why the return is what it is (FY25): a −25.2% net margin × 0.30× asset turnover × 4.36× leverage (assets divided by equity) ≈ −33.0% on equity. The margin does its share; borrowing is a big part of it.

Cosan S.A. has total debt of ₹72.8 B against shareholder equity of ₹29.4 B as of Mar 2026, so its debt is 2.48× its equity. Year by year, that ratio went from 1.79 in FY21 to 2.61 in FY25. Keep that borrowing in mind when reading the returns on this page.

Debt-to-equity shows how much of the business is paid for with borrowed money. Lower is safer, and the direction matters as much as the level.

This company reports in its home currency, not US dollars, so the money charts are left out here. The figures in the text are in that currency (₹); nothing is converted.

We have no ownership or short-position figures for Cosan S.A., so this section says so rather than fill the gap. At normal trading volumes, closing those positions would take about 1.6 days. US companies do not publish a quarter-by-quarter list of owners, so this page uses short interest instead.

There is no quarter-by-quarter list of owners here, so we look at short interest: the share of tradable shares held in short positions, which gain if the price falls.

For Cosan S.A., the Z-score is 0.71. A Z-score above about 3 is safe and below about 1.8 signals danger, so this is in the danger zone. It estimates how far the balance sheet is from trouble; it is not a forecast of failure.

The Z-score estimates how far a company is from balance-sheet trouble. Above about 3 is safe; below about 1.8 is the danger zone. It was built for manufacturers, so it is not used for banks and lenders.

Why it matters: a Z-score of 0.71 is inside the danger zone, so the balance sheet is a real risk.

There is no score against its industry: Cosan S.A. is not among the largest members shown in this industry comparison for Oil & Gas Refining & Marketing.

The score ranks a company within its industry: each measure is scored against the other members. Without that group there is no score, so none is shown.

No sector comparison is shown here, not among the largest members shown in this industry comparison.

Cosan S.A. is the 13th largest of 18 Oil & Gas Refining & Marketing companies on Sector Alpha by market value (scores of 4 November 2026). Just above it: Icahn Enterprises L.P., Par Pacific Holdings, Inc. and Delek Logistics Partners, LP. Just below it: World Kinect Corporation, CrossAmerica Partners LP and ARKO Petroleum Corp.

Oil & Gas Refining & Marketing companies close in size

10. Icahn Enterprises L.P. $3.8 billion
11. Par Pacific Holdings, Inc. $3.5 billion
12. Delek Logistics Partners, LP $3 billion
13. Cosan S.A. $2.8 billion
14. World Kinect Corporation $1.9 billion
15. CrossAmerica Partners LP $774 million
16. ARKO Petroleum Corp. $654 million

All 18 Oil & Gas Refining & Marketing companies, largest first

Companies close in size in other industries

1774. Urban Edge Properties $2.8 billion · REIT - Retail
1775. Gulfport Energy Corporation $2.8 billion · Oil & Gas Exploration & Production
1776. Cosan S.A. $2.8 billion
1777. NBT Bancorp Inc. $2.8 billion · Banks - Regional
1778. Bank of Hawaii Corporation $2.8 billion · Banks - Regional

Sector Alpha, written by code from the published numbers. Data as of 17 September 2026.

Every chart on this page is drawn by code from the published figures, with no forecasts and no price opinions.

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