Sunshine Silver (SSMR) director adds shares and 8,929 RSUs in new filing

Rhea-AI Filing Summary

Sunshine Silver Mining & Refining Co director Radford Lawrence P reported acquiring more company equity. He made an open-market purchase of 2,500 shares of common stock at $13.50 per share, bringing his direct holdings to 11,429 shares after the trade.

He was also granted 8,929 restricted stock units (RSUs), each representing one share of common stock. These RSUs vest in full on the earlier of the first anniversary of the grant date or the day immediately preceding the company’s 2027 annual shareholder meeting, subject to his continued board service.

Insider Trade Summary

Net Buyer: 2,500 shares ($33,750)

Net Buy 2 txns

Insider Radford Lawrence P

Role null

Bought 2,500 shs ($34K)

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	8,929	$0.00	--
Purchase	Common Stock	2,500	$13.50	$34K

Holdings After Transaction: Common Stock — 8,929 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Open-market purchase: 2,500 shares Purchase price: $13.50 per share Direct holdings after trade: 11,429 shares +2 more

5 metrics

Open-market purchase 2,500 shares Common Stock bought on 2026-06-05

Purchase price $13.50 per share Open-market common stock purchase

Direct holdings after trade 11,429 shares Common Stock directly owned following purchase

RSUs granted 8,929 units Restricted stock units awarded to director

RSU vesting condition Earlier of 1-year anniversary or pre-2027 meeting Subject to continued board service

Key Terms

restricted stock units ("RSUs"), open-market purchase, contingent right, vesting

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.

contingent right financial

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

vesting financial

"The RSUs vest in full on the earlier of (i) the first anniversary"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

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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^*

Radford Lawrence P

(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	8,929	D
Common Stock	06/05/2026		P		2,500	A	$13.5	11,429	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 Radford Lawrence P report?

He reported two equity-acquiring transactions: an open-market purchase of 2,500 Sunshine Silver Mining & Refining common shares at $13.50 each, and a grant of 8,929 restricted stock units, each representing a contingent right to one share of common stock.

How many Sunshine Silver Mining (SSMR) shares does the director own after the purchase?

Following the 2,500-share open-market purchase at $13.50, Radford Lawrence P directly holds 11,429 shares of Sunshine Silver Mining & Refining common stock. This figure reflects only his direct ownership position reported in the filing’s non-derivative holdings table.

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

The 8,929 restricted stock units granted to Radford Lawrence P each convert into one Sunshine Silver Mining share. They vest in full on the earlier of the first anniversary of the grant date or the day immediately before the company’s 2027 annual shareholder meeting, contingent on continued board service.

Was the SSMR director’s 2,500-share acquisition an open-market trade?

Yes. The filing labels the 2,500-share transaction as an open-market purchase of Sunshine Silver Mining common stock at $13.50 per share, coded as a “P” transaction, indicating a standard market or private purchase as opposed to a grant or derivative exercise.

Do the 8,929 RSUs for SSMR’s director carry an immediate cost or exercise price?

No. The 8,929 RSUs were granted at a reported price per unit of $0.00, indicating no immediate cash cost to the director. Each RSU represents a contingent right to receive one Sunshine Silver Mining common share upon satisfying the vesting conditions.