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Cosan S.A.

CSAN Net buying
CIK 0001430162 #1879 in the set updated 17 Sep 2026
Bought (120 mo)
$24.52M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$869.89K
$0.00 on a plan · $0.00 straight out of an exercise
Sold at will
$869.89K
4 of 4 sales
Net
+$23.65M
+$23.65M against sales at will

By person

5 insiders · 10 transactions
Insider
Role
Bought
Sold
Net
Holding
Worth
Change
Martins Marcelo Eduardo
Chief Executive Officer
$23.82M (2)
+$23.82M
7,165,262
$30.45M
+0.7%
Cordes Burkhard Otto
Director
$696.03K (4)
+$696.03K
2,408,942
$10.24M
+7.1%
Drummond Maria Rita de Carvalho
Former Chief Legal Officer
$602.81K (3)
−$602.81K
3,189,460
$13.56M
−3.3%
Mello Rubens Ometto Silveira
Director
$267.08K (1)
−$267.08K
0
$0.00
−100.0%
Bergman Rafael
Former Chief Finance Officer
272,714
$1.16M
0.0%

No percentages here. This company's share count has moved by a factor of 2.1 over the window, from 1,866,570,932 to 3,966,570,932 shares. A split, a merger or a large issue changes what the company is, and a holding measured at one point in that run is not a fraction of it at another.

Insider
Date
Role
Action
Shares
Price
Amount
Cordes Burkhard Otto
26 May 2026
Director
Buy indirect
10,000
$4.25
$42.50K
Cordes Burkhard Otto
26 May 2026
Director
Buy indirect
50,000
$4.26
$213.00K
Cordes Burkhard Otto
26 May 2026
Director
Buy indirect
10,000
$4.27
$42.70K
Mello Rubens Ometto Silveira
22 May 2026
Director
Sell indirect
77,640
$3.44
$267.08K
Martins Marcelo Eduardo
19 May 2026
Chief Executive Officer
Buy
2,441,528
$5.14
$12.55M
Cordes Burkhard Otto
18 May 2026
Director
Buy indirect
89,000
$4.47
$397.83K
Drummond Maria Rita de Carvalho
17 Apr 2026
Chief Legal Officer
Sell
37,400
$5.48
$204.91K
Drummond Maria Rita de Carvalho
16 Apr 2026
Chief Legal Officer
Sell
36,200
$5.48
$198.49K
Drummond Maria Rita de Carvalho
15 Apr 2026
Chief Legal Officer
Sell
35,800
$5.57
$199.41K
Martins Marcelo Eduardo
10 Apr 2026
Chief Executive Officer
Buy
1,599,086
$7.05
$11.27M

What was left out

Form 4 filings counted 8
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 0
Sales at will 4
Transactions with no price 0
Shares from compensation/vesting 5,727,903
History held since 21 May 2026