Sunshine Silver Mining (SSMR): Ospraie group discloses 24.8M-share, 17.3% ownership stake

Rhea-AI Filing Summary

Ospraie Real Assets Fund LP and related entities, together with Dwight Anderson, report beneficial ownership of common stock of Sunshine Silver Mining & Refining Co. The reporting persons collectively hold 24,842,328 shares of common stock, representing 17.3% of the outstanding class.

This percentage is based on 143,726,603 shares outstanding immediately following the closing of Sunshine Silver Mining & Refining Co’s initial public offering on June 5, 2026, as described in the company’s final prospectus. The reported holdings include options or warrants for up to 250,000 shares, vesting in three equal annual installments beginning July 15, 2026. The reporting persons have shared voting and dispositive power over all 24,842,328 shares and no sole voting or dispositive power, and several entities and Dwight Anderson expressly disclaim beneficial ownership beyond any pecuniary interest.

Key Figures

Beneficially owned shares: 24,842,328 shares Percent of class: 17.3% Shares outstanding baseline: 143,726,603 shares +3 more

6 metrics

Beneficially owned shares 24,842,328 shares Common stock of Sunshine Silver Mining & Refining Co reported by Ospraie group

Percent of class 17.3% Portion of Sunshine Silver Mining & Refining Co common stock beneficially owned

Shares outstanding baseline 143,726,603 shares Common stock outstanding immediately after June 5, 2026 IPO per final prospectus

Equity options or warrants 250,000 shares Options or warrants included in holdings, vesting in three annual installments from July 15, 2026

Shared voting power 24,842,328 shares Shares over which reporting persons have shared power to vote or direct the vote

Shared dispositive power 24,842,328 shares Shares over which reporting persons have shared power to dispose or direct disposition

Key Terms

beneficial owner, shared voting power, shared dispositive power, initial public offering, +1 more

5 terms

beneficial owner regulatory

"deemed to constitute an admission that any of ... is the beneficial owner of any of the securities"

A beneficial owner is the person who ultimately owns or controls a financial asset or property, even if their name isn't directly on official documents. Think of it like someone who secretly holds the keys to a safe deposit box—others may appear to have access, but the true owner is the one who benefits from what's inside. Identifying beneficial owners helps ensure transparency and prevent illegal activities like money laundering or fraud.

shared voting power regulatory

"Shared Voting Power 24,842,328.00"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

shared dispositive power regulatory

"Shared Dispositive Power 24,842,328.00"

initial public offering financial

"outstanding as of immediately following the closing of the Issuer's initial public offering on June 5, 2026"

An initial public offering (IPO) is when a private company first sells its shares to the public and becomes a stock-listed company. It matters because it allows the company to raise money from a wide range of investors, helping it grow, while giving early shareholders a way to sell some of their ownership.

Schedule 13G regulatory

"for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/10/2026 - 04:24 PM Accepted by SEC EDGAR 08/10/2026 - 04:24 PM Learn about SEC filing dates

FAQ

How much of Sunshine Silver Mining & Refining Co (SSMR) does Ospraie report owning?

Ospraie-related entities and Dwight Anderson report beneficial ownership of 24,842,328 shares of Sunshine Silver Mining & Refining Co common stock, representing 17.3% of the outstanding class based on 143,726,603 shares outstanding after the June 5, 2026 IPO.

What percentage of Sunshine Silver Mining & Refining Co (SSMR) is held according to this Schedule 13G?

The reporting group states it holds 17.3% of Sunshine Silver Mining & Refining Co’s common stock. This percentage is calculated using 143,726,603 shares outstanding immediately after the June 5, 2026 initial public offering, as described in the company’s final prospectus.

How many Sunshine Silver Mining & Refining Co (SSMR) shares does the Ospraie group control voting for?

The reporting persons have shared voting power over 24,842,328 shares of Sunshine Silver Mining & Refining Co and no sole voting power. They also report shared dispositive power over the same number of shares and no sole dispositive power.

What options or warrants are included in Ospraie’s reported SSMR holdings?

The reported holdings include options or warrants to purchase up to 250,000 shares of Sunshine Silver Mining & Refining Co common stock. These equity awards vest and become exercisable in three equal annual installments beginning on July 15, 2026.

Who are the reporting persons on the Sunshine Silver Mining & Refining Co (SSMR) Schedule 13G?

The reporting persons are Ospraie Real Assets Fund LP, its general partner and affiliated management entities, and Dwight Anderson. They collectively report the 24,842,328 shares, while several expressly disclaim beneficial ownership beyond any pecuniary interest.

What is the share count baseline used for Ospraie’s 17.3% stake in SSMR?

The 17.3% ownership figure is calculated using 143,726,603 shares of Sunshine Silver Mining & Refining Co common stock outstanding. This share count reflects the capital structure immediately after the June 5, 2026 initial public offering as described in the final prospectus.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Sunshine Silver Mining & Refining Co

(Name of Issuer)

Common Stock, par value $0.001 per share

(Title of Class of Securities)

867866105

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 867866105

1

Names of Reporting Persons

Ospraie Real Assets Fund LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 24,842,328.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 24,842,328.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

24,842,328.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

17.3 %

12

Type of Reporting Person (See Instructions)

PN

Comment for Type of Reporting Person: (1) The percentage set forth in row 11 is calculated based upon 143,726,603 shares of the common stock of Sunshine Silver Mining & Refining Company (the "Issuer") outstanding as of immediately following the closing of the Issuer's initial public offering on June 5, 2026, as reported in the prospectus that the Issuer filed with the Securities and Exchange Commission on June 5, 2026 (the "Final Prospectus"). (2) The number of shares reported in the table above includes options to purchase up to 250,000 shares of the common stock of the Issuer, which vest and become exercisable in three equal annual installments beginning on July 15, 2026.

SCHEDULE 13G

CUSIP Number(s): 867866105

1

Names of Reporting Persons

Ospraie Real Assets GP LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 24,842,328.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 24,842,328.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

24,842,328.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

17.3 %

12

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person: (1) The percentage set forth in row 11 is calculated based upon 143,726,603 shares of the common stock of the Issuer outstanding as of immediately following the closing of the Issuer's initial public offering on June 5, 2026, as set forth in the Final Prospectus. (2) The number of shares reported in the table above includes options to purchase up to 250,000 shares of the common stock of the Issuer, which vest and become exercisable in three equal annual installments beginning on July 15, 2026.

SCHEDULE 13G

CUSIP Number(s): 867866105

1

Names of Reporting Persons

Ospraie Management, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 24,842,328.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 24,842,328.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

24,842,328.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

17.3 %

12

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person: (1) The percentage set forth in row 11 is calculated based upon 143,726,603 shares of the common stock of the Issuer outstanding as of immediately following the closing of the Issuer's initial public offering on June 5, 2026, as set forth in the Final Prospectus. (2) The number of shares reported in the table above includes options \warrants to purchase up to 250,000 shares of the common stock of the Issuer, which vest and become exercisable in three equal annual installments beginning on July 15, 2026.

SCHEDULE 13G

CUSIP Number(s): 867866105

1

Names of Reporting Persons

Ospraie Holding I, L.P.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 24,842,328.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 24,842,328.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

24,842,328.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

17.3 %

12

Type of Reporting Person (See Instructions)

PN

Comment for Type of Reporting Person: (1) The percentage set forth in row 11 is calculated based upon 143,726,603 shares of the common stock of the Issuer outstanding as of immediately following the closing of the Issuer's initial public offering on June 5, 2026, as set forth in the Final Prospectus. (2) The number of shares reported in the table above includes options to purchase up to 250,000 shares of the common stock of the Issuer, which vest and become exercisable in three equal annual installments beginning on July 15, 2026.

SCHEDULE 13G

CUSIP Number(s): 867866105

1

Names of Reporting Persons

Ospraie Management Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 24,842,328.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 24,842,328.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

24,842,328.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

17.3 %

12

Type of Reporting Person (See Instructions)

CO

Comment for Type of Reporting Person: (1) The percentage set forth in row 11 is calculated based upon 143,726,603 shares of the common stock of the Issuer outstanding as of immediately following the closing of the Issuer's initial public offering on June 5, 2026, as set forth in the Final Prospectus. (2) The number of shares reported in the table above includes options to purchase up to 250,000 shares of the common stock of the Issuer, which vest and become exercisable in three equal annual installments beginning on July 15, 2026.

SCHEDULE 13G

CUSIP Number(s): 867866105

1

Names of Reporting Persons

Dwight Anderson

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 24,842,328.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 24,842,328.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

24,842,328.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

17.3 %

12

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person: (1) The percentage set forth in row 11 is calculated based upon 143,726,603 shares of the common stock of the Issuer outstanding as of immediately following the closing of the Issuer's initial public offering on June 5, 2026, as set forth in the Final Prospectus. (2) The number of shares reported in the table above includes options to purchase up to 250,000 shares of the common stock of the Issuer, which vest and become exercisable in three equal annual installments beginning on July 15, 2026.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Sunshine Silver Mining & Refining Co
(b)	Address of issuer's principal executive offices: 2209 Big Creek Road, Kellogg, Idaho 83837
Item 2.
(a)	Name of person filing: (i) Ospraie Real Assets Fund LP ("ORA Fund") (ii) Ospraie Real Assets GP LLC, the general partner of ORA Fund (iii) Ospraie Management, LLC, the investment manager of ORA Fund (iv) Ospraie Holding I, L.P., the managing member of Ospraie Management, LLC (v) Ospraie Management, Inc., the general partner of Ospraie Holding I, L.P. (vi) Dwight Anderson, the managing member of Ospraie Real Assets GP LLC and the sole owner of Ospraie Management Inc. The foregoing persons are sometimes collectively referred to herein as the "Reporting Persons." Neither the filing of this Schedule 13G nor any of its contents shall be deemed to constitute an admission that any of Ospraie Real Assets GP LLC, Ospraie Management, LLC, Ospraie Holding I, L.P., Ospraie Management, Inc. or Dwight Anderson is the beneficial owner of any of the securities of the Issuer referred to herein that are held directly by ORA Fund for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, except to the extent of his or its respective pecuniary interest therein, if any, and such beneficial ownership is expressly disclaimed.
(b)	Address or principal business office or, if none, residence: Ospraie Real Assets Fund LP, 411 Theodore Fremd Avenue, Suite 240, Rye, NY 10580 Ospraie Real Assets GP LLC, 411 Theodore Fremd Avenue, Suite 240, Rye, NY 10580 Ospraie Management, LLC, 411 Theodore Fremd Avenue, Suite 240, Rye, NY 10580 Ospraie Holding I, L.P., 411 Theodore Fremd Avenue, Suite 240, Rye, NY 10580 Ospraie Management, Inc., 411 Theodore Fremd Avenue, Suite 240, Rye, NY 10580 Dwight Anderson, 411 Theodore Fremd Avenue, Suite 240, Rye, NY 10580
(c)	Citizenship: Ospraie Real Assets Fund LP - Delaware Ospraie Real Assets GP LLC - Delaware Ospraie Management, LLC - Delaware Ospraie Holding I, L.P. - Delaware Ospraie Management, Inc. - Delaware Dwight Anderson - United States
(d)	Title of class of securities: Common Stock, par value $0.001 per share
(e)	CUSIP Number(s): 867866105
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: The information in rows 5 through 9 and 11 on the cover pages to this Schedule 13G, including the footnotes thereto, is hereby incorporated by reference. 24,842,328
(b)	Percent of class: 17.3%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 24,842,328
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 24,842,328
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.	Certifications:
	Not Applicable

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Ospraie Real Assets Fund LP

Signature:	/s/ Dwight Anderson
Name/Title:	Dwight Anderson/Managing Member of the General Partner of Ospraie Real Assets Fund LP
Date:	08/10/2026

Ospraie Real Assets GP LLC

Signature:	/s/ Dwight Anderson
Name/Title:	Dwight Anderson/Managing Member
Date:	08/10/2026

Ospraie Management, LLC

Signature:	/s/ Dwight Anderson
Name/Title:	Dwight Anderson/Sole Owner of the General Partner of the Managing Member of Ospraie Management, LLC
Date:	08/10/2026

Ospraie Holding I, L.P.

Signature:	/s/ Dwight Anderson
Name/Title:	Dwight Anderson/Sole Owner of the General Partner of Ospraie Holding I, L.P.
Date:	08/10/2026

Ospraie Management Inc.

Signature:	/s/ Dwight Anderson
Name/Title:	Dwight Anderson/Sole Owner
Date:	08/10/2026

Dwight Anderson

Signature:	/s/ Dwight Anderson
Name/Title:	Dwight Anderson
Date:	08/10/2026

Exhibit Information

Exhibit 99.A - Joint Filing Agreement