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| Title of each class                          |   | Name of each exchange on which registered |
|----------------------------------------------|--------|-------------------------------------------|
| Ordinary shares, par value $0.0001 per share |   | NASDAQ Capital Market                     |
| Warrants                                     |   | NASDAQ Capital Market                     |

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| Large accelerated filer ☐ | Accelerated filer☐ | Non-accelerated filer ☒ | Emerging growth company ☒ |
|---------------------------------|--------------------------|-------------------------------|---------------------------------|

| U.S. GAAP  ☐ | International Financial Reporting Standards as issued by the International Accounting Standards Board  ☒ |   | Other   ☐ |
|---------------------------------|---------------------------------------------------------------------------------------------------------------------|--------|---------------------------|

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| 4.1    | Tenth Amendment to the Private Instrument of Deed Regarding the Second Public Issuance of Common Debentures, Non-Convertible Into Shares, of a Single Series, of the Unsecured Type, with Additional Real Guarantees and Additional Fiduciary Guarantee for Public Placement with Restricted Placement Efforts, of Estre Ambiental S.A. dated December 20, 2017 ( English Translation of Portuguese Language Document). |
|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |                                                                                                                                                                                                                                                                                                                                                                                                                    |
| 4.2    | Tenth Amendment to the Private Instrument of Deed Regarding the First Public Issuance of Common Debentures, Non-Convertible Into Shares, with Real Guarantee and Additional Fiduciary Guarantee for Public Placement with Restricted Placement Efforts, of Estre Ambiental S.A. dated December 20, 2017 ( English Translation of Portuguese Language Document).                                                         |

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|               | Estre Ambiental Inc. |
|--------------------|----------------------|
|               |                 |   |
|               | By:                  |   | /s/ Sergio Pedreiro |
|               | Name:                | Sergio Pedreiro |
|               | Title:               | Chief Executive Officer |
|               |                 |   |
|               | By:                  |   | /s/ Fabio D’Avila Carvalho |
|               | Name:                | Fabio D’Avila Carvalho |
|               | Title:               | Chief Financial Officer |
|               |                 |   |
| Date: July 2, 2018 |                 |   |

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