CSANY insider buying and SEC filings, explained

Cosan S.A. · CIK 1430162

Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov

Insider activity in the last 12 months

Bought

$24.5M

Insiders who bought

Sold (not marked 10b5-1)

$870K

Planned sales (10b5-1)

Traded	Type	What was filed	Source
May 18–26, 2026	Purchase (code P)	Burkhard Otto Cordes (Director) bought 159,000 shares indirectly between May 18 and May 26 at about $4.38 ($696K), reported as a purchase (code P). Indirect holdings up 12% to 1,509,000 shares. Not marked as a 10b5-1 plan trade.	SEC filing Filed Sep 15, 2026
May 22, 2026	Sale	Rubens Ometto Silveira Mello (Director) sold 77,640 shares indirectly at $3.44 ($267K). Indirect holdings down 100% to 0 shares. Not marked as a 10b5-1 plan trade.	SEC filing Filed May 26, 2026
Apr 15–17, 2026	Sale	Maria Rita de Carvalho Drummond (Chief Legal Officer) sold 109,400 shares between Apr 15 and Apr 17 at about $5.51 ($603K). Holdings down 5% to 2,128,536 shares. Not marked as a 10b5-1 plan trade.	SEC filing Filed May 21, 2026
Apr 10–May 19, 2026	Purchase (code P)	Marcelo Eduardo Martins (CEO and Director) bought 4,040,614 shares between Apr 10 and May 19 at about $5.90 ($23.8M), reported as a purchase (code P). Holdings up 476% to 4,890,286 shares. Not marked as a 10b5-1 plan trade.	SEC filing Filed May 21, 2026

7 routine transactions (such as grants, option exercises or tax withholding) are not listed.

$24.5M in purchases since May 19, 2026 · Purchases traded May 19, 2026 to May 26, 2026 · Closed

Insider	Value	Traded	Source
Marcelo Eduardo Martins (CEO)	$23.8M	May 19, 2026	SEC filing
Burkhard Otto Cordes (Director)	$696K	May 26, 2026	SEC filing

No red flags in the last 12 months.

No key events in the last 12 months.

No 8-K filings in the last 12 months.

Red flags are objective triggers only: the item or form filed, never an opinion.

Follow CSANY in the Insider Ledger app

A plain-English brief of insider purchases, 8-Ks and red flags at the companies you pick. No account needed.