| ☐ | REGISTRATION STATEMENT PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 |
|---------|--------------------------------------------------------------------------------------|

| ☑ | ANNUAL REPORT PURSUANT TO SECTION 13(a) OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |
|---------|-----------------------------------------------------------------------------------------|

|   | For the fiscal year ended January 31, 2017 | Commission file number 001-32929 |
|--------|--------------------------------------------|----------------------------------|

| Title of each class                  | Name of each exchange on which registered |
|--------------------------------------|-------------------------------------------|
| **Common Shares, without par value** | **NYSE MKT and TSX**                      |

| ☑ Annual Information Form | ☑ Audited Annual Financial Statements |
|---------------------------------|---------------------------------------------|

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| - | obtaining permits on a timely basis; |
|---|--------------------------------------|

| - | ability to raise the funds necessary to develop the NorthMet Project and continue operations; |
|---|-----------------------------------------------------------------------------------------------|

| - | ability to execute prospective business plans; |
|---|------------------------------------------------|

| - | changes in the general economic and business conditions, including changes in interest rates and exchange rates; |
|---|------------------------------------------------------------------------------------------------------------------|

| - | changes in the resources market, including prices of natural resources, costs associated with mineral exploration and development, and other economic conditions; |
|---|-------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| - | natural phenomena; |
|---|--------------------|

| - | actions by government authorities, including changes in government regulation; |
|---|--------------------------------------------------------------------------------|

| - | uncertainties associated with legal proceedings; and |
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| - | future decisions by management in response to changing conditions. |
|---|--------------------------------------------------------------------|

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| Contractual Obligations(in 000’s) |   | CarryingValue |    |   | ContractualCash Flows |   |    | Less than 1year |   |   | 1 – 3years |   |   | 3 – 5years |    |   | More than 5years |   |
|-----------------------------------------|--------|---------------|---------|--------|-----------------------|--------|---------|-----------------|--------|--------|------------------|--------|--------|------------------|---------|--------|------------------|--------|
| Accounts payable andaccrued liabilities |   | $             | 3,188   |   |                  | $      | 3,188   |            |   | $      | 3,188            |   |   | $                | -       |   |             | $      | - |   |   | $ | - |   |
| Convertible debt                        |   |          | 42,154  |   |                  |   | 51,099  |            |   |   | -                |   |   |             | 51,099  |   |             |   |   |   |   |   |   |   |
| Non-convertible debt                    |   |          | 65,752  |   |                  |   | 79,766  |            |   |   | -                |   |   |             | 79,766  |   |             |   |   |   |   |   |   |   |
| Environmentalrehabilitation provision   |   |          | 70,626  |   |                  |   | 79,249  |            |   |   | 781              |   |   |             | 6,592   |   |             |   | 20,521 |   |   |   | 51,355 |   |
| Firm Commitments                        |   |          | -       |   |                  |   | 1,127   |            |   |   | 908              |   |   |             | 219     |   |             |   | - |   |   |   | - |   |
| Total                                   |   | $             | 181,720 |   |                  | $      | 214,429 |            |   | $      | 4,877            |   |   | $                | 137,676 |   |             | $      | 20,521 |   |   | $ | 51,355 |   |

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| 99.1 | Annual Information Form for the year ended January 31, 2017 |
|------|-------------------------------------------------------------|

| 99.2 | Consolidated Financial Statements as at and for the years ended January 31, 2017 and 2016 |
|------|-------------------------------------------------------------------------------------------|

| 99.3 | Management’s Discussion and Analysis for the year ended January 31, 2017 |
|------|--------------------------------------------------------------------------------|

| 99.4 | Mine Safety Disclosure |
|------|------------------------|

| 99.5 | Certification of Principal Executive Officer pursuant to 17 C.F.R. 240.13a-14(a) |
|------|----------------------------------------------------------------------------------|

| 99.6 | Certification of Principal Financial Officer pursuant to 17 C.F.R. 240.13a-14(a) |
|------|----------------------------------------------------------------------------------|

| 99.7 | Certification of Principal Executive Officer and Principal Financial Officer pursuant to 17 C.F.R. 240.13a-14(b) and 18 U.S.C. 1350. |
|------|--------------------------------------------------------------------------------------------------------------------------------------|

| 99.8 | Consent of Independent Auditor |
|------|--------------------------------|

| 99.9 | Consent of Technical Report Author – Pierre Desautels |
|------|-------------------------------------------------------------|

| 99.10 | Consent of Technical Report Author – Gordon Zurowski |
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| 99.11 | Consent of Technical Report Author – Karl Everett |
|-------|---------------------------------------------------------|

| 99.12 | Consent of Technical Report Author – David Dreisinger |
|-------|-------------------------------------------------------------|

| 99.13 | Consent of Technical Report Author – William Murray |
|-------|-----------------------------------------------------------|

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|   | POLYMET MINING CORP. |
|--------|----------------------|
|   |                 |   |
|   | /s/ Jonathan Cherry  |
|   | Name:                | Jonathan Cherry |
|   | Title:               | Chief Executive Officer |