UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

(Rule 13d-101)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO § 240.13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO

§ 240.13d-2(a)

(Amendment No. 2)¹

Hudbay Minerals Inc.

(Name of Issuer)

Common Shares, no par value

(Title of Class of Securities)

443628102

(CUSIP Number)

KANWALJIT TOOR

199 Bay Street, Suite 5050

Toronto, Ontario M5L 1E2

+1 416 504 3508

STEVE WOLOSKY, ESQ.

ANDREW FREEDMAN, ESQ.

OLSHAN FROME WOLOSKY LLP

1325 Avenue of the Americas

New York, New York 10019

(212) 451-2300

(Name, Address and Telephone Number of Person

Authorized to Receive Notices and Communications)

November 9, 2018

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box ¨.

Note:  Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits.  See § 240.13d-7 for other parties to whom copies are to be sent.

1              The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP NO. 443628102

	1	NAME OF REPORTING PERSON
			Waterton Mining Parallel Fund Offshore Master, LP
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☒
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			Cayman Islands
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					- 0 -
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					11,253,084
PERSON WITH			9	SOLE DISPOSITIVE POWER
					- 0 -
			10	SHARED DISPOSITIVE POWER
					11,253,084
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			11,253,084
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			4.3%
	14	TYPE OF REPORTING PERSON
			PN

2

CUSIP NO. 443628102

	1	NAME OF REPORTING PERSON
			Waterton Precious Metals Fund II Cayman, LP
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☒
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			Cayman Islands
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					- 0 -
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					11,253,087
PERSON WITH			9	SOLE DISPOSITIVE POWER
					- 0 -
			10	SHARED DISPOSITIVE POWER
					11,253,087
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			11,253,087
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			4.3%
	14	TYPE OF REPORTING PERSON
			PN

3

CUSIP NO. 443628102

	1	NAME OF REPORTING PERSON
			Waterton Mining Parallel Fund Offshore GP Corp.
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☒
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			Cayman Islands
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					- 0 -
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					11,253,084
PERSON WITH			9	SOLE DISPOSITIVE POWER
					- 0 -
			10	SHARED DISPOSITIVE POWER
					11,253,084
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			11,253,084
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			4.3%
	14	TYPE OF REPORTING PERSON
			CO

4

CUSIP NO. 443628102

	1	NAME OF REPORTING PERSON
			Waterton Global Resource Management, LP
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☒
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			Cayman Islands
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					- 0 -
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					11,253,087
PERSON WITH			9	SOLE DISPOSITIVE POWER
					- 0 -
			10	SHARED DISPOSITIVE POWER
					11,253,087
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			11,253,087
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			4.3%
	14	TYPE OF REPORTING PERSON
			PN

5

CUSIP NO. 443628102

	1	NAME OF REPORTING PERSON
			Waterton Global Resource Management Cayman Corp.
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☒
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			Cayman Islands
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					- 0 -
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					11,253,087
PERSON WITH			9	SOLE DISPOSITIVE POWER
					- 0 -
			10	SHARED DISPOSITIVE POWER
					11,253,087
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			11,253,087
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			4.3%
	14	TYPE OF REPORTING PERSON
			CO

6

CUSIP NO. 443628102

	1	NAME OF REPORTING PERSON
			Waterton Global Resource Management, Inc.
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☒
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			Canada
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					- 0 -
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					22,506,171
PERSON WITH			9	SOLE DISPOSITIVE POWER
					- 0 -
			10	SHARED DISPOSITIVE POWER
					22,506,171
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			22,506,171
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			8.6%
	14	TYPE OF REPORTING PERSON
			IA

7

CUSIP NO. 443628102

	1	NAME OF REPORTING PERSON
			Cheryl Brandon
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☒
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			Canada
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					- 0 -
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					22,506,171
PERSON WITH			9	SOLE DISPOSITIVE POWER
					- 0 -
			10	SHARED DISPOSITIVE POWER
					22,506,171
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			22,506,171
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			8.6%
	14	TYPE OF REPORTING PERSON
			IN

8

CUSIP NO. 443628102

	1	NAME OF REPORTING PERSON
			Isser Elishis
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☒
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			USA
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					- 0 -
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					22,506,171
PERSON WITH			9	SOLE DISPOSITIVE POWER
					- 0 -
			10	SHARED DISPOSITIVE POWER
					22,506,171
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			22,506,171
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			8.6%
	14	TYPE OF REPORTING PERSON
			IN

9

CUSIP NO. 443628102

	1	NAME OF REPORTING PERSON
			Kalman Schoor
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☒
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			USA
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					- 0 -
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					22,506,171
PERSON WITH			9	SOLE DISPOSITIVE POWER
					- 0 -
			10	SHARED DISPOSITIVE POWER
					22,506,171
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			22,506,171
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			8.6%
	14	TYPE OF REPORTING PERSON
			IN

10

CUSIP NO. 443628102

	1	NAME OF REPORTING PERSON
			Kanwaljit Toor
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☒
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			Canada
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					- 0 -
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					22,506,171
PERSON WITH			9	SOLE DISPOSITIVE POWER
					- 0 -
			10	SHARED DISPOSITIVE POWER
					22,506,171
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			22,506,171
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			8.6%
	14	TYPE OF REPORTING PERSON
			IN

11

CUSIP NO. 443628102

	1	NAME OF REPORTING PERSON
			Richard J. Wells
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☒
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			Canada
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					- 0 -
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					22,506,171
PERSON WITH			9	SOLE DISPOSITIVE POWER
					- 0 -
			10	SHARED DISPOSITIVE POWER
					22,506,171
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			22,506,171
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			8.6%
	14	TYPE OF REPORTING PERSON
			IN

12

CUSIP NO. 443628102

The following constitutes Amendment No. 2 to the Schedule 13D filed by the undersigned (“Amendment No. 2”). This Amendment No. 2 amends the Schedule 13D as specifically set forth herein.

Item 3. Source and Amount of Funds or Other Consideration.

Item 3 is hereby amended and restated to read as follows:

The Shares purchased by each of Waterton Mining LP and Waterton Fund II were purchased with working capital (which may, at any given time, include margin loans made by brokerage firms in the ordinary course of business) in open market purchases, except as otherwise noted, as set forth in Schedule A, which is incorporated by reference herein. The aggregate purchase price of the 11,253,084 Shares beneficially owned by Waterton Mining LP is approximately C$69,296,837, excluding brokerage commissions. The aggregate purchase price of the 11,253,087 Shares beneficially owned by Waterton Fund II is approximately C$69,296,856, excluding brokerage commissions.

Item 4. Purpose of Transaction.

Item 4 is hereby amended to add the following:

The Reporting Persons continue to believe that substantial change is required on the Issuer’s Board of Directors (the “Board”) in order to restore the Issuer’s credibility and to provide renewed accountability to shareholders, appropriate management oversight, a fresh perspective and highly relevant expertise and skillsets to the Board.

Item 5. Interest in Securities of the Issuer.

Items 5(a)-(c) are hereby amended and restated to read as follows:

The aggregate percentage of Shares reported owned by each person named herein is based upon 261,272,151 Shares outstanding, as of October 30, 2018, which is the total number of Shares outstanding as reported in Exhibit 99.2 to the Issuer’s Report of foreign issuer on Form 6-K filed with the Securities and Exchange Commission November 1, 2018.

A. Waterton Mining LP

(a) As of the close of business on November 13, 2018, Waterton Mining LP beneficially owned 11,253,084 Shares.

Percentage: Approximately 4.3%

(b) 1. Sole power to vote or direct vote: 0
2. Shared power to vote or direct vote: 11,253,084
3. Sole power to dispose or direct the disposition: 0
4. Shared power to dispose or direct the disposition: 11,253,084

(c) The transactions in the Shares by Waterton Mining LP since the filing of Amendment No. 1 to the Schedule 13D are set forth in Schedule A and are incorporated herein by reference.

13

CUSIP NO. 443628102

B. Waterton Fund II

(a) As of the close of business on November 13, 2018, Waterton Fund II beneficially owned 11,253,087 Shares.

Percentage: Approximately 4.3%

(b) 1. Sole power to vote or direct vote: 0
2. Shared power to vote or direct vote: 11,253,087
3. Sole power to dispose or direct the disposition: 0
4. Shared power to dispose or direct the disposition: 11,253,087

(c) The transactions in the Shares by Waterton Fund II since the filing of Amendment No. 1 to the Schedule 13D are set forth in Schedule A and are incorporated herein by reference.

C. Waterton Mining GP

(a) Waterton Mining GP, as the general partner of Waterton Mining LP, may be deemed the beneficial owner of the 11,253,084 Shares owned by Waterton Mining LP.

Percentage: Approximately 4.3%

(b) 1. Sole power to vote or direct vote: 0
2. Shared power to vote or direct vote: 11,253,084
3. Sole power to dispose or direct the disposition: 0
4. Shared power to dispose or direct the disposition: 11,253,084

(c) Waterton Mining GP has not entered into any transactions in the Shares since the filing of Amendment No. 1 to the Schedule 13D. The transactions in the Shares on behalf of Waterton Mining LP since the filing of Amendment No. 1 to the Schedule 13D are set forth in Schedule A and are incorporated herein by reference.

D. WGRM LP

(a) WGRM LP, as the general partner of Waterton Fund II, may be deemed the beneficial owner of the 11,253,087 Shares owned by Waterton Fund II.

Percentage: Approximately 4.3%

(b) 1. Sole power to vote or direct vote: 0
2. Shared power to vote or direct vote: 11,253,087
3. Sole power to dispose or direct the disposition: 0
4. Shared power to dispose or direct the disposition: 11,253,087

(c) WGRM LP has not entered into any transactions in the Shares since the filing of Amendment No. 1 to the Schedule 13D. The transactions in the Shares on behalf of Waterton Fund II since the filing of Amendment No. 1 to the Schedule 13D are set forth in Schedule A and are incorporated herein by reference.

E. WGRM Corp.

(a) WGRM Corp., as the general partner of WGRM LP, may be deemed the beneficial owner of the 11,253,087 Shares owned by Waterton Fund II.

14

CUSIP NO. 443628102

Percentage: Approximately 4.3%

(b) 1. Sole power to vote or direct vote: 0
2. Shared power to vote or direct vote: 11,253,087
3. Sole power to dispose or direct the disposition: 0
4. Shared power to dispose or direct the disposition: 11,253,087

(c) WGRM Corp. has not entered into any transactions in the Shares since the filing of Amendment No. 1 to the Schedule 13D. The transactions in the Shares on behalf of Waterton Fund II since the filing of Amendment No. 1 to the Schedule 13D are set forth in Schedule A and are incorporated herein by reference.

F. WGRM Inc.

(a) WGRM Inc., as the investment adviser to each of Waterton Mining LP and Waterton Fund II, may be deemed the beneficial owner of the (i) 11,253,084 Shares owned by Waterton Mining LP and (ii) 11,253,087 Shares owned by Waterton Fund II.

Percentage: Approximately 8.6%

(b) 1. Sole power to vote or direct vote: 0
2. Shared power to vote or direct vote: 22,506,171
3. Sole power to dispose or direct the disposition: 0
4. Shared power to dispose or direct the disposition: 22,506,171

(c) WGRM Inc. has not entered into any transactions in the Shares since the filing of Amendment No. 1 to the Schedule 13D. The transactions in the Shares on behalf of each of Waterton Mining LP and Waterton Fund II since the filing of Amendment No. 1 to the Schedule 13D are set forth in Schedule A and are incorporated herein by reference.

G. Messrs. Elishis, Schoor, Toor and Wells and Ms. Brandon

(a) Each of Messrs. Elishis, Schoor, Toor and Wells and Ms. Brandon, as a senior executive of WGRM Inc., may be deemed the beneficial owner of the (i) 11,253,084 Shares owned by Waterton Mining LP and (ii) 11,253,087 Shares owned by Waterton Fund II.

Percentage: Approximately 8.6%

(b) 1. Sole power to vote or direct vote: 0
2. Shared power to vote or direct vote: 22,506,171
3. Sole power to dispose or direct the disposition: 0
4. Shared power to dispose or direct the disposition: 22,506,171

(c) None of Messrs. Elishis, Schoor, Toor and Wells and Ms. Brandon has entered into any transactions in the Shares since the filing of Amendment No. 1 to the Schedule 13D. The transactions in the Shares on behalf of each of Waterton Mining LP and Waterton Fund II since the filing of Amendment No. 1 to the Schedule 13D are set forth in Schedule A and are incorporated herein by reference.

15

CUSIP NO. 443628102

SIGNATURES

After reasonable inquiry and to the best of his knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

Dated: November 13, 2018

WATERTON MINING PARALLEL FUND OFFSHORE MASTER, LP
By:	Waterton Mining Parallel Fund Offshore GP Corp., its general partner
By:	/s/ Richard J. Wells
	Name:	Richard J. Wells
	Title:	Chief Financial Officer

Waterton Precious Metals Fund II Cayman, LP
By:	Waterton Global Resource Management, LP, its general partner
By:	Waterton Global Resource Management Cayman Corp., its general partner
By:	/s/ Richard J. Wells
	Name:	Richard J. Wells
	Title:	Chief Financial Officer

Waterton Mining Parallel Fund Offshore GP Corp.
By:	/s/ Richard J. Wells
	Name:	Richard J. Wells
	Title:	Chief Financial Officer

Waterton Global Resource Management, LP
By:	Waterton Global Resource Management Cayman Corp., its general partner
By:	/s/ Richard J. Wells
	Name:	Richard J. Wells
	Title:	Chief Financial Officer

16

CUSIP NO. 443628102

Waterton Global Resource Management Cayman Corp.
By:	/s/ Richard J. Wells
	Name:	Richard J. Wells
	Title:	Chief Financial Officer

WATERTON GLOBAL RESOURCE MANAGEMENT, INC.
By:	/s/ Richard J. Wells
	Name:	Richard J. Wells
	Title:	Chief Financial Officer

/s/ Cheryl Brandon

Cheryl Brandon

/s/ Isser Elishis

Isser Elishis

/s/ Kalman Schoor

Kalman Schoor

/s/ Kanwaljit Toor

Kanwaljit Toor

/s/ Richard J. Wells

Richard J. Wells

17

CUSIP NO. 443628102

SCHEDULE A

Transactions in the Shares Since the Filing of Amendment No. 1 to the Schedule 13D

Nature of the Transaction Amount of Securities Purchased/(Sold) Price (C$)^* Date of Purchase/Sale

Waterton Mining Parallel Fund Offshore Master, LP

Purchase of Common Shares	250,000	5.0424	10/24/2018
Purchase of Common Shares	250,000	4.9712	10/25/2018
Purchase of Common Shares	125,000	4.9294	10/26/2018
Purchase of Common Shares	181,000	4.8490	10/29/2018
Purchase of Common Shares	50,000	4.6979	10/30/2018
Purchase of Common Shares	84,500	6.5993	11/08/2018
Purchase of Common Shares	397,500	6.4943	11/09/2018
Purchase of Common Shares	225,000	6.3847	11/12/2018
Purchase of Common Shares	72,850	6.3959	11/13/2018

Waterton Precious Metals Fund II Cayman, LP

Purchase of Common Shares	250,000	5.0424	10/24/2018
Purchase of Common Shares	250,000	4.9712	10/25/2018
Purchase of Common Shares	125,000	4.9294	10/26/2018
Purchase of Common Shares	181,000	4.8490	10/29/2018
Purchase of Common Shares	50,000	4.6979	10/30/2018
Purchase of Common Shares	84,500	6.5993	11/08/2018
Purchase of Common Shares	397,500	6.4943	11/09/2018
Purchase of Common Shares	225,000	6.3847	11/12/2018
Purchase of Common Shares	72,851	6.3959	11/13/2018

^* The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from C$4.68 to C$6.90. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth herein.