COSAN S.A.

Corporate Taxpayer ID (CNPJ/MF): 50.746.577/0001-15

Company Registry (NIRE): 35.300.177.045

NOTICE TO THE MARKET

Cosan S.A. ("Cosan" or "Company") (B3: CSAN3), in response to the official letter no. 1083/2020-SLSreceived on December 7, 2020, from the Listing Superintendence and Issuer Supervision of B3 - Brasil, Bolsa, Balcão ("B3"), with the following content:

"In light of the recent variations observed in the company's stock, number of trades and amount traded, as detailed below, we hereby request the company to inform, by 12/08/2020, if there is any event of their knowledge to justify such variations.

Common Shares

Prices (R$ per share)

Date

Opening

Minimum

Maximum

Average

Last

%

No.

Amount

Volume (R$)

Var.

trades

24/11/2020

84,86

83,35

86,45

84,88

83,65

-1,30

13.074

2.014.200

170.956.407,00

25/11/2020

83,66

83,16

86,30

84,88

84,47

0,98

11.037

1.828.000

155.165.832,00

26/11/2020

84,20

83,93

85,69

84,74

84,47

0,00

5.392

882.200

74.760.778,00

27/11/2020

84,31

81,86

85,57

83,08

82,20

-2,68

11.265

1.953.100

162.262.351,00

30/11/2020

82,08

77,54

82,19

79,10

77,54

-5,66

13.126

3.467.200

274.266.971,00

01/12/2020

78,30

76,56

79,86

77,72

76,74

-1,03

14.612

3.091.100

240.232.696,00

02/12/2020

76,80

74,66

77,69

75,91

75,84

-1,17

11.233

2.079.500

157.862.973,00

03/12/2020

75,85

75,20

76,82

75,93

75,98

0,18

9.074

1.509.400

114.613.966,00

04/12/2020

75,66

73,40

77,00

75,26

76,30

0,42

21.297

5.654.500

425.548.256,00

12/07/2020*

75,60

70,62

75,94

72,92

71,76

-5,95

19.073

4.108.100

299.566.719,00

*Updated by 6:15 p.m."

Hereby clarifies to its shareholders and the market that:

On November 27, 2020, the Company published a Material Fact informing that the proposal of its subsidiary, Compass Gás e Energia S.A., was not qualified for the divestment process of 51% of Petrobras Gás S.A. - Gaspetro by Petróleo Brasileiro S.A. - Petrobras; and

On December 4, 2020, the Company published a Material Fact informing the amount of the exchange ratio determined by the independent committees of the companies involved in the merger of Cosan Limited and Cosan Logística S.A. into the Company.

The Company understands that the Material Facts stated above explain the variation period mentioned by B3.

The Company values transparency and will keep its shareholders and the market in general informed, in compliance with the Law and the applicable regulations.

São Paulo, December 8, 2020

Marcelo Eduardo Martins

Chief Financial and Investor Relations Officer

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Cosan SA published this content on 08 December 2020 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 09 December 2020 09:48:02 UTC