Heather Eileen White - 03 Jun 2026 Form 3 Insider Report for Sunshine Silver Mining & Refining Co (SSMR)

Reporting relationship: Chief Executive Officer, Director
Issuer ticker: SSMR
Reported as of: 03 Jun 2026
Net transaction value: $0
SEC form: 3
Accepted by SEC: 03 Jun 2026, 16:29:29 UTC
Next SEC filing: 08 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Michelle Shepston, as attorney-in-fact

Key filing fact

Heather Eileen White filed Form 3 for Sunshine Silver Mining & Refining Co (SSMR) on 03 Jun 2026.

Key facts

This page summarizes Heather Eileen White's Form 3 filing for Sunshine Silver Mining & Refining Co (SSMR).
0 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 03 Jun 2026, 16:29.

Change

No earlier filing in this sequence is available for direct comparison.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Official SEC source

Ownership activity is grounded in SEC Form 3 disclosures.

View source filing

Reporting Owners (1)

CIK 0002132663 Primary reporting owner

White Heather Eileen

Relationship: Chief Executive Officer, Director
Address: 2209 BIG CREEK RD, KELLOGG
Signature: /s/ Michelle Shepston, as attorney-in-fact
Signature date: 03 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

SSMR holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 50,000
Date: 03 Jun 2026
Ownership: By White Mining Consulting Inc.
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

SSMR holding Derivative

Stock Option (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 03 Jun 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,463,000
Exercise price: $4.00
Footnotes: F2

SSMR holding Derivative

Warrants

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 03 Jun 2026
Ownership: By White Mining Consulting Inc.
Underlying class: Common Stock
Underlying amount: 25,000
Exercise price: $5.00
Footnotes: F1, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

The reporting person is the President of White Mining Consulting Inc. and may be deemed to beneficially own securities held by White Mining Consulting Inc.

Footnote F2

These stock options were granted on July 15, 2025 and vest in three equal annual installments on the first three anniversaries of the grant date, subject to the reporting person's continuous service.

Footnote F3

Each warrant is exercisable for one share of common stock until the later of two years from the date of purchase or six months after the completion of the Issuer's initial public offering.

SEC remarks

Exhibit 24 - Power of Attorney.