Director at Sunshine Silver Mining (SSMR) granted 8,929 restricted stock units

Rhea-AI Filing Summary

Muniz Quintanilla Daniel reported acquisition or exercise transactions in this Form 4 filing.

Sunshine Silver Mining & Refining Co director Daniel Muniz Quintanilla received an equity award of restricted stock units. He was granted 8,929 shares of Common Stock at $0.00 per share, increasing his direct holdings to 8,929 shares.

The award is structured as restricted stock units (RSUs), each representing a contingent right to 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 Meeting of Stockholders, provided he continues serving on the Board through that date.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Muniz Quintanilla Daniel

Role null

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	8,929	$0.00	--

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

Footnotes (1)

1. [object Object]

Key Figures

RSUs granted: 8,929 shares Grant price: $0.00 per share Shares after transaction: 8,929 shares

3 metrics

RSUs granted 8,929 shares Restricted stock units of Common Stock granted on 2026-06-05

Grant price $0.00 per share Equity award, not an open-market purchase

Shares after transaction 8,929 shares Total direct holdings following RSU grant

Key Terms

restricted stock units ("RSUs"), contingent right, vest in full, Annual Meeting of Stockholders

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.

contingent right financial

"Each RSU represents a contingent right to receive one share of the Issuer's common stock."

vest in full financial

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

Annual Meeting of Stockholders financial

"or (ii) the day immediately proceeding the date of the Issuer's 2027 Annual Meeting of Stockholders"

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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^*

Muniz Quintanilla Daniel

(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

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 did Sunshine Silver Mining (SSMR) director Daniel Muniz Quintanilla report on this Form 4?

He reported receiving 8,929 restricted stock units of Sunshine Silver Mining common stock. The RSUs were granted at $0.00 per share as an equity award and represent compensation rather than an open-market purchase or sale.

How many Sunshine Silver Mining (SSMR) shares does Daniel Muniz Quintanilla hold after this transaction?

After the grant, he beneficially owns 8,929 shares of Sunshine Silver Mining common stock. All of these shares are tied to the newly granted restricted stock units reported in this Form 4 filing.

What are the vesting terms of the RSUs granted to the SSMR director?

The RSUs vest in full on the earlier of the first anniversary of the grant date or the day immediately preceding Sunshine Silver Mining’s 2027 Annual Meeting of Stockholders, contingent on his continued service on the Board through that date.

Does this SSMR Form 4 show a stock purchase or sale by the director?

No, it shows a grant of restricted stock units as compensation, coded as an acquisition under transaction code “A.” There is no open-market buying or selling of Sunshine Silver Mining shares in this filing.

What does each RSU granted to the Sunshine Silver Mining (SSMR) director represent?

Each restricted stock unit represents a contingent right to receive one share of Sunshine Silver Mining common stock. The director actually receives the shares only when the RSUs vest under the specified conditions.