Cosan S.A. (CSAN)
OTC: CSAN · Retail-Auto Dealers & Gasoline Stations · Sao Paulo, Sp, BR · filing with the SEC since 2008
Who owns Cosan S.A.
As filed with the SECHolders of 5% or more
2
Rubens Ometto Silveira Mello holds 20.7% of Common shares, without par value ("Shares") and American Depositary Shares ("ADSs"), each representing four Shares, as its SCHEDULE 13D/A filed Nov 12, 2025 says.
Directors and officers
11
report now, of 11 people on the record since 2026. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 2 named at left.
Holders of 5% or moreshare of the class, as filed
Rubens Ometto Silveira Mello
SCHEDULE 13D/A · filed Nov 12, 2025 · Common shares, without par value ("Shares") and American Depositary Shares ("ADSs"), each representing four Shares · 36% in Sep 23, 2025
Blackrock, Inc.
SCHEDULE 13G · filed Feb 14, 2025 · Common Stock
What CSAN reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Biometano Verde Paulinia S.A
An entity · subsidiary · owns, named in the 20-F filed Apr 10, 2026
Castanheira Propriedades Agricolas S.A.
An entity · subsidiary · owns, named in the 20-F filed Apr 10, 2026
Comgas
An entity · subsidiary · owns, named in the 20-F filed Apr 10, 2026
Commit Gás S.A.
An entity · subsidiary · owns, named in the 20-F filed Apr 10, 2026
Compass Gas E Energia S A
An entity · subsidiary · owns, named in the 20-F filed Apr 10, 2026
Cosan Dez Participações S.A.
An entity · related party, subsidiary · owns, named in the 20-F filed Apr 10, 2026
Cosan Limited Partners Brasil Consultoria Ltda
An entity · subsidiary · owns, named in the 20-F filed Apr 10, 2026
Cosan Luxembourg S A
An entity · subsidiary · owns, named in the 20-F filed Apr 10, 2026
269 subsidiaries in 17 countries, from the list filed with the 20-F filed Apr 10, 2026.
Insider tradesForm 4
4sales
6purchases
0sales on a scheduled plan
2people selling
$900,000sold, in dollars
$24.5Mbought, in dollars
Open-market trades on Form 4 from Oct 27, 2025 to Oct 27, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Oct 27, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window4 of 11 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Drummond Maria Rita De Carvalho | Chief Legal Officer | 3 | $600,000 | 0 | 0 | $0 |
| Mello Rubens Ometto Silveira | director | 1 | $300,000 | 0 | 0 | $0 |
| Cordes Burkhard Otto | director | 0 | $0 | 0 | 4 | $700,000 |
| Martins Marcelo Eduardo | Chief Executive Officer | 0 | $0 | 0 | 2 | $23.8M |