Cosan S.A. Sponsored ADR (CSAN) Insider Trading

Last 12 months

Insiders bought $24.5M and sold $870k on the open market.

None of the selling was scheduled in advance under a 10b5-1 plan.

Net open-market

+$23.6M

2 buys · 2 sales

Under a 10b5-1 plan

of the value sold

Insiders who bought / sold

2 / 2

executives and directors

Last open-market buy

May 2026

May 26, 2026

Get an email when CSAN's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
May 18 – 26	Burkhard Otto Cordes Director	Bought 4 parts	159,000	$4.38 average	$696k	7.1%	Form 4
May 22	Rubens Ometto Silveira Mello Director	SoldNo plan	77,640	$3.44	$267k	<0.1%	Form 4
Apr 10 – May 19	Marcelo Eduardo Martins Chief Executive Officer	Bought 2 parts	4,040,614	$5.90 average	$23.8M	84%	Form 4
Apr 15 – 17	Maria Rita De Carvalho Drummond Chief Legal Officer	SoldNo plan 3 parts	109,400	$5.51 average	$603k	3.1%	Form 4

May 18 – 26
Burkhard Otto Cordes
Director · bought 159,000 at avg $4.38
$696k
7.1% of stake
May 22No plan
Rubens Ometto Silveira Mello
Director · sold 77,640 at $3.44
$267k
<0.1% of stake
Apr 10 – May 19
Marcelo Eduardo Martins
Chief Executive Officer · bought 4,040,614 at avg $5.90
$23.8M
84% of stake
Apr 15 – 17No plan
Maria Rita De Carvalho Drummond
Chief Legal Officer · sold 109,400 at avg $5.51
$603k
3.1% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch CSAN, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Data sourced from company filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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