Sunshine Silver Mining (SSMR) director adds shares and receives RSU grant

Rhea-AI Filing Summary

Sunshine Silver Mining & Refining Co director Douglas Groh increased his stake through both a market purchase and an equity grant. He bought 10,000 shares of common stock in an open-market transaction at $13.50 per share and also received 8,929 restricted stock units as a board compensation award.

Following these transactions, his directly held common stock position reported in the filing was 143,929 shares. The RSUs represent the right to receive an equal number of common shares and vest in full on the earlier of the first anniversary of the grant or immediately before the company’s 2027 annual stockholder meeting, contingent on his continued board service.

Insights

Equity compensation and insider trading analyst

Director increased exposure through a modest open-market buy plus standard RSU grant.

Director Douglas Groh executed an open-market purchase of 10,000 shares of Sunshine Silver Mining & Refining Co common stock at $13.50 per share and received 8,929 restricted stock units as equity compensation for board service.

The purchase is a discretionary cash outlay, while the RSU grant is non-cash and vests in full on the earlier of the first anniversary of grant or immediately before the company’s 2027 annual meeting, subject to continued service. After these transactions, Groh’s reported direct common stock holdings were 143,929 shares, indicating that the new purchase is a relatively small addition to an existing position.

The filing shows no derivative positions remaining, suggesting the reported exposure is entirely in common stock and RSUs. Subsequent company filings may provide additional context on future RSU vesting or any further insider trading activity, but this disclosure on its own looks like routine governance and compensation-related activity.

Insider Trade Summary

Net Buyer: 10,000 shares ($135,000)

Net Buy 2 txns

Insider Groh Douglas

Role null

Bought 10,000 shs ($135K)

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	8,929	$0.00	--
Purchase	Common Stock	10,000	$13.50	$135K

Holdings After Transaction: Common Stock — 133,929 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Open-market purchase: 10,000 shares Purchase price: $13.50 per share RSU grant size: 8,929 RSUs +2 more

5 metrics

Open-market purchase 10,000 shares Common Stock bought on June 5, 2026

Purchase price $13.50 per share Price for 10,000-share open-market buy

RSU grant size 8,929 RSUs Restricted stock units granted to director

Holdings after transaction 143,929 shares Direct common stock held following reported transactions

RSU vesting timing By 2027 annual meeting Vests earlier of first anniversary or pre-2027 meeting

Key Terms

restricted stock units ("RSUs"), open-market purchase, grant, award, or other acquisition, contingent right

4 terms

restricted stock units ("RSUs") financial

"Represents shares of restricted stock units ("RSUs") granted to the reporting person."

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

open-market purchase financial

"transaction_action": "open-market purchase""

An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.

grant, award, or other acquisition financial

"transaction_code_description": "Grant, award, or other acquisition""

contingent right financial

"Each RSU represents a contingent right to receive one share"

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Groh Douglas

(Last) (First) (Middle)

2209 BIG CREEK RD

(Street)

KELLOGG IDAHO 83837

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Sunshine Silver Mining & Refining Co [ SSMR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/05/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	06/05/2026		A		8,929(1)	A	$0	133,929	D
Common Stock	06/05/2026		P		10,000	A	$13.5	143,929	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents shares of restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of the Issuer's common stock. The RSUs vest in full on the earlier of (i) the first anniversary of the grant date or (ii) the day immediately proceeding the date of the Issuer's 2027 Annual Meeting of Stockholders, subject to the reporting person's continued service as a member of the Issuer's Board of Directors through such date.

	/s/ Michelle Shepston, as attorney-in-fact	06/08/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transactions did SSMR director Douglas Groh report?

Douglas Groh reported buying 10,000 SSMR common shares in the open market at $13.50 each and receiving 8,929 restricted stock units as a board equity grant, both dated June 5, 2026, increasing his overall reported share-based exposure.

How many Sunshine Silver Mining (SSMR) shares does Douglas Groh hold after these transactions?

After the reported transactions, Douglas Groh’s direct common stock holdings were 143,929 shares. This figure reflects his position following the 10,000-share open-market purchase and the additional equity award disclosed in the same Form 4 filing.

At what price did Douglas Groh buy SSMR shares in the open market?

He purchased 10,000 Sunshine Silver Mining common shares at $13.50 per share. This was an open-market or private transaction classified under code P, indicating a discretionary buy rather than an automatic or compensation-related acquisition.

What are the terms of the 8,929 RSUs granted to SSMR director Douglas Groh?

The 8,929 RSUs each represent a right to receive one SSMR share. They vest in full on the earlier of the first anniversary of the grant date or immediately before the company’s 2027 annual stockholder meeting, conditioned on his continued board service.

Is Douglas Groh’s RSU grant from Sunshine Silver Mining a cash transaction?

No, the RSU grant is a non-cash equity award with a reported price per unit of $0.00. It provides a contingent right to receive SSMR common shares upon vesting, rather than involving an immediate cash payment by the director.