United States · SEC Form 4 · Snapshot date: 2026-10-19 · Built: 2026-10-19 · 中文

US · SEC FORM 4

Cosan S.A.

CSAN3 · OTC · CIK 0001430162 · Consumer Cyclical

INSIDER SIGNAL

54.1 / 100

1 buyers · 1 purchase transaction lines · $12.5M gross purchase

WHY THIS SIGNAL?

Buyer breadthLow

Purchase sizeStrong

RoleModerate

RecencyLow

ConvictionStrong

Score anatomy

Each bar shows the contribution to the current score; the weights and formula stay unchanged.

Cluster+7.0 / 35

Purchase size+23.3 / 25

Role+13.0 / 20

Recency+0.8 / 10

Conviction+10.0 / 10

What is holding the score back?

⚠ Cluster breadth is moderate · 1 insider(s), not 4+
⚠ Role scores low · most senior buyer: Chief Executive Officer (CEO, chair and 10% owners score lowest)
⚠ Purchase activity is becoming less recent

Purchase-size comments are relative to the model scale. Average daily volume is a separate market-context diagnostic.

US-v1.2 ranks qualifying equity purchases under the current 180-day rules. The score is a research priority, not a return forecast or probability. Backtests have not shown that a higher US score is followed by better returns.

Purchase breadth & concentration

QUALIFYING BUYERS2

PURCHASE CONCENTRATION95%Largest buyer: Martins Marcelo Eduardo · $12.5M

CLUSTER BUYING · 15D2 insidersPeak activity: 2026-05-18–2026-05-26

Roles in the peak window: Chief Executive Officer, Director. Concentration uses priced qualifying P lines only and does not change the saved score.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct

Drummond Maria Rita de CarvalhoChief Legal Officer

○○○○○○

Martins Marcelo EduardoChief Executive Officer

○●○○

Bergman RafaelOther

○○

Cordes Burkhard OttoDirector

●●

Mello Rubens Ometto SilveiraDirector

▼

● Purchase▼ Sale○ Other

—

SIGNAL HISTORY

54.1 / 100

Latest recorded score

↑ +0.1 ptsversus the previous recorded snapshot

Oct 1454.1
Oct 1554.1
Oct 1654.1
Oct 1854.0
Oct 1954.1

Only scores saved when a full US scoring run completed are shown; gaps are not reconstructed.

Recent Form 4 activity

6Purchases

4Sales

12Other Form 4 lines

8SEC filings · 365 days

BUYING5 qualifying P line(s) · 180 days

SELLING1 sale line(s) · context only

OTHER11 exercise / withholding / award / gift / other lines

10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context capture is under review for CSAN3. Last attempt: 2026-10-11T13:56:38.494880+00:00. —

Short interest

The FINRA report lists no short interest for this ticker.

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction date	Reporting owner	Type	Security	Shares	Avg. price	Approx. value	Source
2026-05-26	Cordes Burkhard Otto	Purchase (P)	COMMON STOCK (BVMF: CSAN3)	70,000	USD 4.26	USD 298,200	SEC filing ↗
2026-05-19	Martins Marcelo Eduardo	Purchase (P)	COMMON STOCK (BVMF: CSAN3)	2,441,528	USD 5.14	USD 12,549,454	SEC filing ↗
2026-05-18	Cordes Burkhard Otto	Purchase (P)	COMMON STOCK (BVMF: CSAN3)	89,000	USD 4.47	USD 397,830	SEC filing ↗
2026-04-10	Martins Marcelo Eduardo	Purchase (P)	COMMON STOCK (BVMF: CSAN3)	1,599,086	USD 7.05	USD 11,273,556	SEC filing ↗

Form 4 evidence

22 transaction lines in the latest 365-day window; 22 in local history.

Date	Owner	Type	Security	Shares	Avg. price	Approx. value	Source
2026-09-11	Drummond Maria Rita de Carvalho	J (J)	LONG TERM INCENTIVE (BVMF: CSAN3)	150,496	USD 3.90	USD 586,934	SEC filing ↗
2026-09-11	Drummond Maria Rita de Carvalho	J (J)	COMMON STOCK (BVMF: CSAN3)	150,496	USD 3.90	USD 586,934	SEC filing ↗
2026-09-11	Bergman Rafael	J (J)	LONG TERM INCENTIVE (BVMF: CSAN3)	55,242	USD 3.90	USD 215,444	SEC filing ↗

Show recent Form 4 evidence (20 grouped rows)

Date	Owner	Type	Security	Shares	Avg. price	Approx. value	Source
2026-09-11	Drummond Maria Rita de Carvalho	J (J)	LONG TERM INCENTIVE (BVMF: CSAN3)	150,496	USD 3.90	USD 586,934	SEC filing ↗
2026-09-11	Drummond Maria Rita de Carvalho	J (J)	COMMON STOCK (BVMF: CSAN3)	150,496	USD 3.90	USD 586,934	SEC filing ↗
2026-09-11	Bergman Rafael	J (J)	LONG TERM INCENTIVE (BVMF: CSAN3)	55,242	USD 3.90	USD 215,444	SEC filing ↗
2026-09-11	Bergman Rafael	J (J)	COMMON STOCK (BVMF: CSAN3)	55,242	USD 3.90	USD 215,444	SEC filing ↗
2026-08-10	Martins Marcelo Eduardo	J (J)	LONG TERM INCENTIVE (BVMF: CSAN3)	276,475	USD 3.99	USD 1,103,135	SEC filing ↗
2026-08-10	Martins Marcelo Eduardo	J (J)	COMMON STOCK (BVMF: CSAN3)	276,475	USD 3.99	USD 1,103,135	SEC filing ↗
2026-08-10	Drummond Maria Rita de Carvalho	J (J)	LONG TERM INCENTIVE (BVMF: CSAN3)	103,765	USD 3.99	USD 414,022	SEC filing ↗
2026-08-10	Drummond Maria Rita de Carvalho	J (J)	COMMON STOCK (BVMF: CSAN3)	103,765	USD 3.99	USD 414,022	SEC filing ↗
2026-05-26	Cordes Burkhard Otto	Purchase (P)	COMMON STOCK (BVMF: CSAN3)	70,000	USD 4.26	USD 298,200	SEC filing ↗
2026-05-22	Mello Rubens Ometto Silveira	Sale (S)	Common Stock	77,640	USD 3.44	USD 267,082	SEC filing ↗
2026-05-19	Martins Marcelo Eduardo	Purchase (P)	COMMON STOCK (BVMF: CSAN3)	2,441,528	USD 5.14	USD 12,549,454	SEC filing ↗
2026-05-19	Martins Marcelo Eduardo	J (J)	LONG TERM INCENTIVE (BVMF: CSAN3)	2,441,528	USD 5.14	USD 12,549,454	SEC filing ↗
2026-05-19	Drummond Maria Rita de Carvalho	J (J)	LONG TERM INCENTIVE (BVMF: CSAN3)	280,954	USD 5.14	USD 1,444,104	SEC filing ↗
2026-05-19	Drummond Maria Rita de Carvalho	J (J)	COMMON STOCK (BVMF: CSAN3)	280,954	USD 5.14	USD 1,444,104	SEC filing ↗
2026-05-18	Cordes Burkhard Otto	Purchase (P)	COMMON STOCK (BVMF: CSAN3)	89,000	USD 4.47	USD 397,830	SEC filing ↗
2026-04-17	Drummond Maria Rita de Carvalho	Sale (S)	COMMON STOCK (BVMF: CSAN3)	37,400	USD 5.48	USD 204,952	SEC filing ↗
2026-04-16	Drummond Maria Rita de Carvalho	Sale (S)	COMMON STOCK (BVMF: CSAN3)	36,200	USD 5.48	USD 198,376	SEC filing ↗
2026-04-15	Drummond Maria Rita de Carvalho	Sale (S)	COMMON STOCK (BVMF: CSAN3)	35,800	USD 5.57	USD 199,406	SEC filing ↗
2026-04-10	Martins Marcelo Eduardo	Purchase (P)	COMMON STOCK (BVMF: CSAN3)	1,599,086	USD 7.05	USD 11,273,556	SEC filing ↗
2026-04-10	Martins Marcelo Eduardo	J (J)	LONG TERM INCENTIVE (BVMF: CSAN3)	1,552,511	USD 7.05	USD 10,945,203	SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date	2026-10-19
Ranking version	US-v1.2
Data quality	PASS ELIGIBLE · —
Ticker	CSAN3
CIK	0001430162
Sector	Consumer Cyclical
Industry	— Yahoo Finance
SEC SIC	5500 Retail-Auto Dealers & Gasoline Stations
Exchange	OTC

Data coverage

Local Form 4 history	22 transaction lines from 2026-04-10 to 2026-09-11 6 P purchase lines · 4 S sale lines · 12 other lines
SEC company submissions	Open SEC filings ↗

Local ledger as of 2026-10-19. Mapping status is an audit field and does not erase SEC filing evidence.