NYSE:CSAN

Cosan S.a Stock Insider Trading

Energy > Oil & Gas Refining & Marketing

Buy CSAN

*Your capital is at risk

$2.91

+0.0300 (+1.04%)

At Close: Jun 26, 2026

Cosan S.A Stock Insider Power

Based on the 29 latest insides trades, we have calculated the insider power to be negative at -11.56. In total, the insiders bought 439.95K and sold 467.99K CSAN shares in the last 29 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 29 transactions)	-11.56
● Buy	439.95K shares
● Sell	467.99K shares
83% Buy Activity Weak Positive Correlation
Buy Signal Low Confidence May 18, 2026 Analysis Breakdown: Weakened by a contradictory negative Insider Power Score. Confidence increased due to high data reliability score of 90. Supported by overwhelming buy-side pressure (83% buys).

Historical Insider Trades

Date	Type	Person	Role	Amount
May 26, 2026 Buy	COMMON STOCK (BVMF: CSAN3) P-Purchase	Cordes Burkhard Otto Director	Director	10 000 Value: $42.5K
May 26, 2026 Buy	COMMON STOCK (BVMF: CSAN3) P-Purchase	Cordes Burkhard Otto Director	Director	50 000 Value: $213.0K
May 26, 2026 Buy	COMMON STOCK (BVMF: CSAN3) P-Purchase	Cordes Burkhard Otto Director	Director	10 000 Value: $42.7K
May 22, 2026 Sell	Common Stock S-Sale	Mello Rubens Ometto Silveira Director	Director	77 640 Value: $267.1K
May 19, 2026 Buy	COMMON STOCK (BVMF: CSAN3) J-Other	Drummond Maria Rita De Carvalho Chief Legal Officer	Officer	280 954 Value: $1.44M
May 19, 2026 Sell	LONG TERM INCENTIVE (BVMF: CSAN3) J-Other	Drummond Maria Rita De Carvalho Chief Legal Officer	Officer	280 954 Value: $1.44M
May 18, 2026 Buy	COMMON STOCK (BVMF: CSAN3) P-Purchase	Cordes Burkhard Otto Director	Director	89 000 Value: $397.8K
Apr 17, 2026 Sell	COMMON STOCK (BVMF: CSAN3) S-Sale	Drummond Maria Rita De Carvalho Chief Legal Officer	Officer	37 400 Value: $204.9K
Apr 16, 2026 Sell	COMMON STOCK (BVMF: CSAN3) S-Sale	Drummond Maria Rita De Carvalho Chief Legal Officer	Officer	36 200 Value: $198.5K
Apr 15, 2026 Sell	COMMON STOCK (BVMF: CSAN3) S-Sale	Drummond Maria Rita De Carvalho Chief Legal Officer	Officer	35 800 Value: $199.4K
Mar 18, 2026 Buy	Common Stock J-Other	Esteves Andre Santos	Director	0 Value: $0
Mar 18, 2026 Buy	COMMON STOCK (BVMF: CSAN3)	Cordes Burkhard Otto Director	Director	0 Value: $0
Mar 18, 2026 Buy	ADS CSAN 1	Cordes Burkhard Otto Director	Director	0 Value: $0
Mar 18, 2026 Buy	COMMON STOCK (BVMF: CSAN3)	Cordes Burkhard Otto Director	Director	0 Value: $0
Mar 18, 2026 Buy	LONG TERM INCENTIVE (BVMF: CSAN3)2	Martins Marcelo Eduardo Chief Executive Officer	CEO / President	0 Value: $0
Mar 18, 2026 Buy	COMMON STOCK (BVMF: CSAN3)	Martins Marcelo Eduardo Chief Executive Officer	CEO / President	0 Value: $0
Mar 18, 2026 Buy	ADS CSAN1	Martins Marcelo Eduardo Chief Executive Officer	CEO / President	0 Value: $0
Mar 18, 2026 Buy	Common Stock J-Other	Mazzola Renato Antonio Secondo	Director	0 Value: $0
Mar 18, 2026 Buy	Common Stock	Mello Rubens Ometto Silveira Director	Director	0 Value: $0
Mar 18, 2026 Buy	Common Stock1	Mello Rubens Ometto Silveira Director	Director	0 Value: $0
Mar 18, 2026 Buy	Common Stock1	Mello Rubens Ometto Silveira Director	Director	0 Value: $0
Mar 18, 2026 Buy	COMMON STOCK (BVMF: CSAN3)	Drummond Maria Rita De Carvalho Chief Legal Officer	Officer	0 Value: $0
Mar 18, 2026 Buy	LONG TERM INCENTIVE (BVMF: CSAN3)	Drummond Maria Rita De Carvalho Chief Legal Officer	Officer	0 Value: $0
Mar 18, 2026 Buy	ADS CSAN	Drummond Maria Rita De Carvalho Chief Legal Officer	Officer	0 Value: $0
Mar 18, 2026 Buy	COMMON STOCK (CSAN3)	Rosenberg Whitaker Carneiro Ralph Gustavo Director	Director	0 Value: $0

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT COSAN S.A.

Cosan S.A., through its subsidiaries, primarily engages in the fuel distribution business in Brazil, Europe, Latin America, North America, Asia, and internationally. The company's Raízen segment distributes and markets fuels through a franchised network of service stations under the Shell brand; engages in the petroleum refining; operation of convenience stores; manufacture and sale of automotive and industrial lubricants; and production and sal...

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