UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549



FORM 20-F/A



☐  REGISTRATION
STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934



OR



☒  ANNUAL
REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934



For the fiscal year ended June 30, 2018



OR



☐  
  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934



OR



☐  
SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934



Date of event requiring this shell company
report ____________________________



For the transition period from_________________to______________







Commission File Number: 000-05151



NEXTSOURCE MATERIALS INC.

(Exact name of Registrant as specified in
its charter)



Ontario, Canada

(Jurisdiction of incorporation or organization)





1001-145 Wellington Street West
Toronto, Ontario
Canada M5J 1H8

(Address of principal executive offices)





Craig Scherba, Telephone (416) 364-4911

1001-145 Wellington Street West, Toronto,
Ontario Canada M5J 1H8

(Name, telephone, e-mail and/or facsimile
number and address of company contact person)







|Securities registered or to be registered pursuant to section 12(b) of the Act:            |  | None                          
|------------------------------------------------------------------------------------------ |  | ------------------------------
|                                                                                           |  |                               
|Securities registered or to be registered pursuant to Section 12(g) of the Act:            |  | Common Stock, $0.001 par value
|                                                                                           |  | (Title of Class)              
|                                                                                           |  |                               
|Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act: |  | None                          
|                                                                                           |  | (Title of Class)              
|                                                                                           |  |                               
|The number of outstanding shares of the issuer’s common stock as of June 30, 2018:         |  | 469,933,611 shares            



Indicate by check mark if the registrant is a well-known seasoned
issuer, as defined in Rule 405 of the Securities Act.  Yes ☐  No ☒



If this report is an annual or a transition report, indicate
by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Securities Exchange Act
of 1934.     Yes ☐  No ☒



Indicate by check mark whether the registrant (1) has filed
all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or
for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements
for the past 90 days.    Yes ☒    No ☐











Indicate by check mark whether the registrant has submitted
electronically every Interactive Data File required to be submitted pursuant
to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the
registrant was required to submit such files).     Yes ☒ 
     No ☐



Indicate by check mark whether the registrant is a large accelerated
filer, an accelerated filer, or a non-accelerated filer. See definition of “accelerated filer and large accelerated filer”
in Rule 12b-2 of the Exchange Act. (Check one):



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

If an emerging growth company that prepares its financial statements
in accordance with U.S. GAAP, indicate by check mark if the registrant has elected not to use the extended transition period for
complying with any new or revised financial accounting standards† provided pursuant to Section 13(a) of the Exchange Act.
☐



Indicate by check mark which basis of accounting the registrant
has used to prepare the financial statements included in this filing:



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



If “Other” has been checked in response to the previous
question, indicate by check mark which financial statement item the registrant has elected to follow.

Item 17 ☐    Item
18 ☐



If this is an annual report, indicate by check mark whether
the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).     Yes ☐      No
☒





EXPLANATORY NOTE



This Amendment on Form 20-F/A is being filed
by NextSource Materials Inc. as Amendment No. 1 to its annual report on Form 20-F for the fiscal year ended June 30,
2008, as filed with the Securities and Exchange Commission on October 1, 2018.



We
have updated the disclosures contained in our annual report on Form 20-F to include a PCAOB compliant audit opinion in the Audited
Annual Consolidated Financial Statements and additional exhibits as required under Form 20-F. We have made no other changes to
our report. The disclosures in the report remain effective and no changes were required for events that have occurred since October
1, 2018, the date on which we originally filed our annual report on Form 20-F.





ANNUAL INFORMATION FORM,

AUDITED ANNUAL CONSOLIDATED FINANCIAL
STATEMENTS,

MANAGEMENT DISCUSSION AND ANALYSIS,

AND NOTICE OF ANNUAL MEETING AND MANAGEMETN
PROXY CIRCULAR



Annual Information Form

The Registrant’s Annual Information
Form for the fiscal year ended June 30, 2018 is attached as Exhibit 99.1 to this Annual Report on Form 20-F and is incorporated
herein by reference.



Audited Annual Consolidated Financial
Statements

The Registrant’s audited annual consolidated
financial statements for the fiscal year ended June 30, 2018, including the report of the independent registered public accounting
firm with respect thereto, are attached as Exhibit 99.2 to this Annual Report on Form 20-F and are incorporated herein by
reference.



Management’s Discussion and Analysis

The Registrant’s Management’s
Discussion and Analysis for the fiscal year ended June 30, 2018 is attached as Exhibit 99.3 to this Annual Report on Form
20-F and is incorporated herein by reference.



Notice of Annual Meeting and Management
Proxy Circular

The Registrant's Notice of Annual and Special
Meeting of Shareholders and Management Information Circular for the fiscal year ended June 30, 2018 is attached as Exhibit 99.4
to this Annual Report on Form 20-F and is incorporated herein by reference.



Additional Information

An Additional Information document is attached
as Exhibit 99.5 to this Annual Report on Form 20-F and is incorporated herein by reference.





Cross Reference to
Form 20-F



|Item No. | Cross Reference to Form 20-F                          | Exhibit
|-------- | ----------------------------------------------------- | -------
|         |                                                       |        
|Part I   |                                                       |        
|Item 1   | Identity of Directors, Senior Management and Advisers | 99.4   
|Item 2   | Offer Statistics and Expected Timetable               | N/A    









|Item 3    | Key Information                                                              |                                       
|--------- | ---------------------------------------------------------------------------- | --------------------------------------
|          | A. Selected financial data                                                   | 99.2                                  
|          | B. Capitalization and indebtedness                                           | N/A                                   
|          | C. Reasons for the offer and use of proceeds                                 | N/A                                   
|          | D. Risk factors                                                              | 99.1                                  
|Item 4    | Information on the Company                                                   |                                       
|          | A. History and development of the company                                    | 99.1                                  
|          | B. Business overview                                                         | 99.1                                  
|          | C. Organizational structure                                                  | 99.1                                  
|          | D. Property, plants and equipment                                            | 99.1 and 99.2                         
|Item 4A   | Unresolved Staff Comments                                                    | N/A                                   
|Item 5    | Operating and Financial Review and Prospects                                 |                                       
|          | A. Operating results                                                         | 99.2 and 99.3                         
|          | B. Liquidity and capital resources                                           | 99.2 and 99.3                         
|          | C. Research and development, patents and licenses, etc.                      | N/A                                   
|          | D. Trend information                                                         | 99.1                                  
|          | E. Off-balance sheet arrangements                                            | 99.3                                  
|          | F. Tabular disclosure of contractual obligations                             | N/A                                   
|          | G. Safe harbor                                                               | 99.1                                  
|Item 6    | Directors, Senior Management and Employees                                   |                                       
|          | A. Directors and senior management                                           | 99.1 and 99.4                         
|          | B. Compensation                                                              | 99.1 and 99.4                         
|          | C. Board practices                                                           | 99.1 and 99.4                         
|          | D. Employees                                                                 | 99.1 and 99.4                         
|          | E. Share Ownership                                                           | 99.1 and 99.4                         
|Item 7    | Major Shareholders and Related Party Transactions                            |                                       
|          | A. Major shareholders                                                        | 99.4 and 99.5                         
|          | B. Related party transactions                                                | 99.1 and 99.2                         
|          | C. Interests of experts and counsel                                          | 99.1                                  
|Item 8    | Financial Information                                                        |                                       
|          | A. Consolidated Statements and Other Financial Information                   | 99.1 and 99.2                         
|          | B. Significant changes                                                       | 99.2                                  
|Item 9    | The Offer and Listing                                                        |                                       
|          | A. Offer and listing details                                                 | N/A                                   
|          | B. Plan of distribution                                                      | N/A                                   
|          | C. Markets                                                                   | N/A                                   
|          | D. Selling shareholders                                                      | N/A                                   
|          | E. Dilution                                                                  | N/A                                   
|          | F. Expenses of the issue                                                     | N/A                                   
|Item 10   | Additional Information                                                       |                                       
|          | A. Share Capital                                                             | 99.1 and 99.2                         
|          | B. Memorandum and articles of association                                    | 1.1 and 1.2                           
|          | C. Material contracts                                                        | 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8
|          | D. Exchange controls                                                         | N/A                                   
|          | E. Taxation                                                                  | N/A                                   
|          | F. Dividends and paying agents                                               | N/A                                   
|          | G. Statement by experts                                                      | 99.1                                  
|          | H. Documents on display                                                      | 99.1                                  
|          | I. Subsidiary information                                                    | N/A                                   
|Item 11   | Quantitative and Qualitative Disclosures About Market Risk                   | N/A                                   
|Item 12   | Description of Securities Other than Equity Securities                       | N/A                                   
|          |                                                                              |                                       
|Part II   |                                                                              |                                       
|Item 13   | Defaults, Dividend Arrearages and Delinquencies                              | N/A                                   
|Item 14   | Material Modifications to the Rights of Security Holders and Use of Proceeds | N/A                                   
|Item 15   | Controls and Procedures                                                      | 99.3                                  
|Item 16   | [Reserved]                                                                   |                                       
|Item 16A. | Audit committee financial expert                                             | 99.5                                  
|Item 16B. | Code of Ethics                                                               | 11                                    
|Item 16C. | Principal Accountant Fees and Services                                       | 99.4                                  
|Item 16D. | Exemptions from the Listing Standards for Audit Committees                   | N/A                                   
|Item 16E. | Purchases of Equity Securities by the Issuer and Affiliated Purchases        | N/A                                   
|Item 16F. | Change in Registrant’s Certifying Accountant                                 | N/A                                   
|Item 16G. | Corporate Governance                                                         | N/A                                   
|Item 16H. | Mine Safety Disclosure                                                       | N/A                                   
|          |                                                                              |                                       









|Part III |                      |              
|-------- | -------------------- | -------------
|Item 17  | Financial Statements | N/A          
|Item 18  | Financial Statements | 99.2         
|Item 19  | Exhibits             | Exhibit Index





EXHIBIT INDEX



| | 1.1 | Articles of Continuance of NextSource Materials Inc., dated December 27, 2017.
| | --- | ------------------------------------------------------------------------------

| | 1.2 | By-Law No. 1 of NextSource Materials Inc., dated December 27, 2017.
| | --- | -------------------------------------------------------------------

| | 4.1 | Amended and Restated Stock Option Plan of NextSource Materials, Inc. (Incorporated by reference to the registrant’s current
report on Form 8-K as filed with the SEC on October 16, 2013)
| | --- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | 4.2 | Stock Option Plan of NextSource Materials, Inc. (Incorporated by reference to Appendix B to Schedule 14A as filed with the
SEC on November 14, 2016)
| | --- | ----------------------------------------------------------------------------------------------------------------------------------------------------

| | 4.3 | Form of Warrant relating to private placement completed during June 2014 (Previously filed with our Annual Report on Form 10-K
filed with the SEC on September 28, 2017)
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | 4.4 | Form of Warrant relating to private placement completed during August 2018.
| | --- | ---------------------------------------------------------------------------

| | 4.5 | Employment Agreement with Craig Scherba (Previously filed with our Annual Report on Form 10-K filed with the SEC on September
28, 2017).
| | --- | ----------------------------------------------------------------------------------------------------------------------------------------

| | 4.6 | Employment Agreement with Brent Nykoliation (Previously filed with our Annual Report on Form 10-K filed with the SEC on September
28, 2017).
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------

| | 4.7 | Management Consulting Agreement with Marc Johnson (Previously filed with our Annual Report on Form 10-K filed with the SEC
on September 28, 2017).
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------------

| | 4.8 | Management Consulting Agreement with Robin Borley (Previously filed with our Annual Report on Form 10-K filed with the SEC
on September 28, 2017).
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------------

| | 8 | List of Subsidiaries (see “Corporate Structure” on page 4 of the Annual Information Form for the fiscal year ended
June 30, 2018 filed hereto as Exhibit 99.1.)
| | - | ---------------------------------------------------------------------------------------------------------------------------------------------------------------

| | 11 | Code of Ethics and Business Conduct.
| | -- | ------------------------------------

| | 12.1 | Certification of the Chief Executive Officer pursuant to Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of
1934.
| | ---- | ---------------------------------------------------------------------------------------------------------------------------------

| | 12.2 | Certification of the Chief Financial Officer pursuant to Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of
1934.
| | ---- | ---------------------------------------------------------------------------------------------------------------------------------

| | 13.1 | Certification of the Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002.
| | ---- | ------------------------------------------------------------------------------------------------------------------------------------------------------

| | 13.2 | Certification of the Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002.
| | ---- | ------------------------------------------------------------------------------------------------------------------------------------------------------

| | 99.1 | Annual Information Form for the fiscal year ended June 30, 2018.
| | ---- | ----------------------------------------------------------------

| | 99.2 | Audited Annual Consolidated Financial Statements for the fiscal year ended June 30, 2018
| | ---- | ----------------------------------------------------------------------------------------

| | 99.3 | Management's Discussion and Analysis for the fiscal year ended June 30, 2018.
| | ---- | -----------------------------------------------------------------------------

| | 99.4 | Notice of Annual Meeting and Management Proxy Circular for the fiscal year ended June 30, 2018.
| | ---- | -----------------------------------------------------------------------------------------------

| | 99.5 | Additional Information.
| | ---- | -----------------------



The registrant hereby certifies that it meets all of the requirements
for filing on Form 20-F and that it has duly caused and authorized the undersigned to sign this annual report on its behalf.



|Dated: October 31, 2018 | NEXTSOURCE MATERIALS INC.,     
|----------------------- | -------------------------------
|                        | By: /s/ Marc Johnson           
|                        |                                
|                        | Name:  Marc Johnson            
|                        | Title:  Chief Financial Officer









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