| ☐ | 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 eleven months ended December 31, 2017 | Commission file number 001-32929 |
|-----------------------------------------------|----------------------------------|

| Title of each class                  | Name of each exchange on which registered |
|--------------------------------------|-------------------------------------------|
| **Common Shares, without par value** | **NYSE American 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 and accrued liabilities |   | $             | 3,630   |   |                  | $      | 3,630   |            |   | $      | 3,630            |   |   | $                | -      |   |             | $      | - |   |   | $ | - |   |
| Convertible debt                         |   |          | 49,067  |   |                  |   | 51,183  |            |   |   | 51,183           |   |   |             |   |   |             |   | - |   |   |   | - |   |
| Non-convertible debt                     |   |          | 92,268  |   |                  |   | 96,294  |            |   |   | 96,294           |   |   |             |   |   |             |   | - |   |   |   | - |   |
| Environmental rehabilitation provision   |   |          | 65,402  |   |                  |   | 102,576 |            |   |   | 1,266            |   |   |             | 12,589 |   |             |   | 7,897 |   |   |   | 80,824 |   |
| Firm Commitments                         |   |          | -       |   |                  |   | 1,529   |            |   |   | 448              |   |   |             | 581    |   |             |   | 500 |   |   |   | - |   |
| Total                                    |   | $             | 210,397 |   |                  | $      | 255,212 |            |   | $      | 152,821          |   |   | $                | 13,170 |   |             | $      | 8,397 |   |   | $ | 80,824 |   |

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| 99.1 | Annual Information Form for the eleven months ended December 31, 2017 |
|------|-----------------------------------------------------------------------|

| 99.2 | Consolidated Financial Statements as at December 31, 2017 and January 31, 2017 and for the eleven months ended December 31, 2017 and for the twelve months ended January 31, 2017 |
|------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 99.3 | Management’s Discussion and Analysis as at December 31, 2017 and January 31, 2017 and for the eleven months ended December 31, 2017 and for the twelve months 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 PricewaterhouseCoopers LLP |
|------|---------------------------------------|

| 99.9 | Consent of Technical Report Author – Zachary J. Black |
|------|-------------------------------------------------------------|

| 99.10 | Consent of Technical Report Author – Jennifer J. Brown |
|-------|--------------------------------------------------------------|

| 99.11 | Consent of Technical Report Author – Nicholas Dempers |
|-------|-------------------------------------------------------------|

| 99.12 | Consent of Technical Report Author – Thomas L. Drielick |
|-------|---------------------------------------------------------------|

| 99.13 | Consent of Technical Report Author – Art S. Ibrado |
|-------|----------------------------------------------------------|

| 99.14 | Consent of Technical Report Author – Erin L. Patterson |
|-------|--------------------------------------------------------------|

| 99.15 | Consent of Technical Report Author – Thomas J. Radue |
|-------|------------------------------------------------------------|

| 99.16 | Consent of Technical Report Author – Herbert E. Welhener |
|-------|----------------------------------------------------------------|

| 99.17 | Consent of Technical Report Author – Jeff S. Ubl |
|-------|--------------------------------------------------------|

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