SEC ownership of Sunshine Silver Mining & Refining Co

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0002091017.

Comparable stake leader

Electrum Silver US LLC

Disclosed value leader

Electrum Silver US LLC

Comparable rows

50/50

Latest evidence

30 Jun 2026

Top shareholders Insider holders Latest transactions
Public ticker
SSMR on NYSE
Parsed ownership sources
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
Largest SEC-reported holder
Electrum Silver US LLC
Ranking: Comparable ownership first, then disclosed value
Ownership snapshot CIK-linked ownership evidence from parsed SEC filings. 3 signals
Comparable ownership rows
50 of 50
Meaning: Rows with safely comparable ownership %
Latest 13D/G holder
Electrum Silver US LLC
Source: Latest parsed Schedule 13D/G stake
Latest parsed ownership date
30 Jun 2026
Freshness: Most recent filing date in this holder set
Issuer Names, identifiers, and filing context for this profile. 2 identity fields
Issuer CIK
0002091017
Issuer location
Kellogg, ID

Ownership snapshot

Top shareholders of Sunshine Silver Mining & Refining Co (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader
Electrum Silver US LLC
Disclosed value leader
Electrum Silver US LLC
Comparable rows
50/50
Latest evidence
30 Jun 2026
13D/G 3/4/5 13F Lead comparable stake: 63% 13D/G row: Electrum Silver US LLC Showing 1-8 of 50 holder rows.

Quick read

Electrum Silver US LLC leads the comparable SEC ownership view at 63%.

50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Electrum Silver US LLC's linked filing trail.
Comparable ownership Top 5
Electrum Silver US LLC 63%
Ospraie Real Assets Fund LP 17%
Electrum Group LLC 59%
Anson Funds Management LP 1.7%
SPROTT INC. 1.7%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-8 of 50 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
Electrum Silver US LLC
13D/G 3/4/5
Thomas Scott Kaplan · Director, 10%+ Owner
13D/G 3/4/5
63%
$1,264,022,580
96,050,348 shares
 $0 30 Jun 2026
Ospraie Real Assets Fund LP
13D/G 3/4/5
10%+ Owner
13D/G 3/4/5
17%
$326,925,036
24,842,328 shares
 $0 30 Jun 2026
Electrum Group LLC
13F 3/4/5
Company · Director, 10%+ Owner
13F 3/4/5
59%
$1,128,523,158
85,364,838 shares
 — 30 Jun 2026
Anson Funds Management LP
13F
Company
13F
1.7%
$32,263,344
2,440,495 shares
 — 30 Jun 2026
SPROTT INC.
13F
Company
13F
1.7%
$32,215,950
2,436,910 shares
 — 30 Jun 2026
FRANKLIN RESOURCES INC
13F
Company
13F
1.4%
$26,440,000
2,000,000 shares
 — 30 Jun 2026
Lingotto Investment Management LLP
13F
Company
13F
1.4%
$26,440,000
2,000,000 shares
 — 30 Jun 2026
AMERIPRISE FINANCIAL INC
13F
Company
13F
0.91%
$17,314,445
1,309,716 shares
 — 30 Jun 2026
How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Forms 3/4/5 flow

Insider trading overview

Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 23 Aug 2025.

Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value Sell value
Shares: 0 Shares: 0
Window (months) Buy shares Sell shares Buy value Sell value Net value
0-3 0 0 $0 $0 $0
3-6 0 0 $0 $0 $0
6-9 0 0 $0 $0 $0
9-12 0 0 $0 $0 $0

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-20 of 29 reporting-owner rows connected to Sunshine Silver Mining & Refining Co. Open a relationship link for the CIK-to-CIK filing trail.

Rows
29
Largest Forms 3/4/5 holder
Douglas Groh
Net 12M change
$0
Latest report
05 Jun 2026
Name Relationship Holdings Value Past Year Net Change Change % Valuation Report Date
Douglas Groh Director Mixed 05 Jun 2026
Pieter A. van Niekerk Chief Financial Officer Mixed 03 Jun 2026
Anna El-Erian Director Mixed 05 Jun 2026
Ali Erfan Director Mixed 05 Jun 2026
Quintanilla Daniel Muniz Director Mixed 05 Jun 2026
Lawrence P. Radford Director Mixed 05 Jun 2026
Paul H. Zink Director Mixed 05 Jun 2026
Nathan John Ebeling Director Mixed 05 Jun 2026
Heather Eileen White Chief Executive Officer, Director Mixed 05 Jun 2026
Michelle H. Shepston General Counsel Mixed 05 Jun 2026
Thomas S. Kaplan Director, 10%+ Owner Mixed 05 Jun 2026
Electrum Silver US LLC Director, 10%+ Owner Mixed 05 Jun 2026
Electrum Strategic Management LLC Director, 10%+ Owner Mixed 05 Jun 2026
ELECTRUM GLOBAL HOLDINGS L.P. Director, 10%+ Owner Mixed 05 Jun 2026
TEG Global GP Ltd. Director, 10%+ Owner Mixed 05 Jun 2026
Electrum Group LLC Director, 10%+ Owner Mixed 05 Jun 2026
Electrum Silver US II LLC Director, 10%+ Owner Mixed 05 Jun 2026
Electrum Strategic Opportunities Fund II GP L.P. Director, 10%+ Owner Mixed 05 Jun 2026
ESOF II GP Ltd. Director, 10%+ Owner Mixed 05 Jun 2026
Electrum Strategic Opportunities Fund II L.P. Director, 10%+ Owner Mixed 05 Jun 2026

Recent insider transactions for Sunshine Silver Mining & Refining Co

Showing up to 300 recent insider transactions from the last 12 months.

Insider Symbol Class Transaction % SEC-reported value SEC-reported price Shares Shares owned Date Ownership
Ospraie Real Assets Fund LP SSMR Common Stock, par value $0.001 per share Sale -2.19% -555,555 24,758,995 05 Jun 2026 Direct
Ospraie Real Assets Fund LP SSMR Common Stock, par value $0.001 per share Sale -2.19% -555,555 24,758,995 05 Jun 2026 Direct
Ospraie Real Assets Fund LP SSMR Common Stock, par value $0.001 per share Sale -2.19% -555,555 24,758,995 05 Jun 2026 Direct
Ospraie Real Assets Fund LP SSMR Common Stock, par value $0.001 per share Sale -2.19% -555,555 24,758,995 05 Jun 2026 Direct
Ospraie Real Assets Fund LP SSMR Common Stock, par value $0.001 per share Sale -2.19% -555,555 24,758,995 05 Jun 2026 Direct
Ospraie Real Assets Fund LP SSMR Common Stock, par value $0.001 per share Sale -2.19% -555,555 24,758,995 05 Jun 2026 Direct
Ospraie Real Assets Fund LP SSMR Common Stock, par value $0.001 per share Exercise of in-the-money or at-the-money derivative security 11.5% 2,615,060 25,314,550 05 Jun 2026 Direct
Ospraie Real Assets Fund LP SSMR Common Stock, par value $0.001 per share Exercise of in-the-money or at-the-money derivative security 11.5% 2,615,060 25,314,550 05 Jun 2026 Direct
Ospraie Real Assets Fund LP SSMR Common Stock, par value $0.001 per share Exercise of in-the-money or at-the-money derivative security 11.5% 2,615,060 25,314,550 05 Jun 2026 Direct
Ospraie Real Assets Fund LP SSMR Common Stock, par value $0.001 per share Exercise of in-the-money or at-the-money derivative security 11.5% 2,615,060 25,314,550 05 Jun 2026 Direct
Ospraie Real Assets Fund LP SSMR Common Stock, par value $0.001 per share Exercise of in-the-money or at-the-money derivative security 11.5% 2,615,060 25,314,550 05 Jun 2026 Direct
Ospraie Real Assets Fund LP SSMR Common Stock, par value $0.001 per share Exercise of in-the-money or at-the-money derivative security 11.5% 2,615,060 25,314,550 05 Jun 2026 Direct
Ospraie Real Assets Fund LP SSMR Warrant (right to buy) Exercise of in-the-money or at-the-money derivative security 2,615,060 0 05 Jun 2026 Direct
Ospraie Real Assets Fund LP SSMR Warrant (right to buy) Exercise of in-the-money or at-the-money derivative security 2,615,060 0 05 Jun 2026 Direct
Ospraie Real Assets Fund LP SSMR Warrant (right to buy) Exercise of in-the-money or at-the-money derivative security 2,615,060 0 05 Jun 2026 Direct
Ospraie Real Assets Fund LP SSMR Warrant (right to buy) Exercise of in-the-money or at-the-money derivative security 2,615,060 0 05 Jun 2026 Direct
Ospraie Real Assets Fund LP SSMR Warrant (right to buy) Exercise of in-the-money or at-the-money derivative security 2,615,060 0 05 Jun 2026 Direct
Ospraie Real Assets Fund LP SSMR Warrant (right to buy) Exercise of in-the-money or at-the-money derivative security 2,615,060 0 05 Jun 2026 Direct
Michelle H. Shepston SSMR Common Stock Purchase 65 65 05 Jun 2026 By Daughter
Michelle H. Shepston SSMR Common Stock Purchase 5,000 5,000 05 Jun 2026 Direct
Heather Eileen White SSMR Common Stock Purchase 2,000 2,000 05 Jun 2026 Direct
Nathan John Ebeling SSMR Common Stock Award 8,929 8,929 05 Jun 2026 Direct
Paul H. Zink SSMR Common Stock Award 8,929 8,929 05 Jun 2026 Direct
Lawrence P. Radford SSMR Common Stock Purchase 28% 2,500 11,429 05 Jun 2026 Direct
Lawrence P. Radford SSMR Common Stock Award 8,929 8,929 05 Jun 2026 Direct
Quintanilla Daniel Muniz SSMR Common Stock Award 8,929 8,929 05 Jun 2026 Direct
Douglas Groh SSMR Common Stock Purchase 7.47% 10,000 143,929 05 Jun 2026 Direct
Douglas Groh SSMR Common Stock Award 7.14% 8,929 133,929 05 Jun 2026 Direct
Ali Erfan SSMR Common Stock Award 8,929 8,929 05 Jun 2026 Direct
Anna El-Erian SSMR Common Stock Purchase 448% 40,000 48,929 05 Jun 2026 Direct
Anna El-Erian SSMR Common Stock Award 8,929 8,929 05 Jun 2026 Direct
Tigris Financial Group Ltd. SSMR Common Stock Tax liability -0.74% -582,022 78,095,918 05 Jun 2026 By Electrum Silver US LLC
Tigris Financial Group Ltd. SSMR Common Stock Tax liability -0.74% -582,022 78,095,918 05 Jun 2026 By Electrum Silver US LLC
Tigris Financial Group Ltd. SSMR Common Stock Tax liability -0.74% -582,022 78,095,918 05 Jun 2026 By Electrum Silver US LLC
Tigris Financial Group Ltd. SSMR Common Stock Options Exercise 3.61% 2,739,640 78,677,940 05 Jun 2026 By Electrum Silver US LLC
Tigris Financial Group Ltd. SSMR Common Stock Options Exercise 3.61% 2,739,640 78,677,940 05 Jun 2026 By Electrum Silver US LLC
Tigris Financial Group Ltd. SSMR Common Stock Options Exercise 3.61% 2,739,640 78,677,940 05 Jun 2026 By Electrum Silver US LLC
Tigris Financial Group Ltd. SSMR Common Stock Award 8,929 8,929 05 Jun 2026 Direct
Tigris Financial Group Ltd. SSMR Common Stock Award 8,929 8,929 05 Jun 2026 Direct
Tigris Financial Group Ltd. SSMR Common Stock Award 8,929 8,929 05 Jun 2026 Direct
Tigris Financial Group Ltd. SSMR Warrant (right to buy) Options Exercise -100% -2,739,640 0 05 Jun 2026 By Electrum Silver US LLC
Tigris Financial Group Ltd. SSMR Warrant (right to buy) Options Exercise -100% -2,739,640 0 05 Jun 2026 By Electrum Silver US LLC
Tigris Financial Group Ltd. SSMR Warrant (right to buy) Options Exercise -100% -2,739,640 0 05 Jun 2026 By Electrum Silver US LLC
Kaplan Thomas Scott SSMR Common Stock Tax liability -0.74% -582,022 78,095,918 05 Jun 2026 By Electrum Silver US LLC
Kaplan Thomas Scott SSMR Common Stock Tax liability -0.74% -582,022 78,095,918 05 Jun 2026 By Electrum Silver US LLC
Kaplan Thomas Scott SSMR Common Stock Tax liability -0.74% -582,022 78,095,918 05 Jun 2026 By Electrum Silver US LLC
Kaplan Thomas Scott SSMR Common Stock Tax liability -0.74% -582,022 78,095,918 05 Jun 2026 By Electrum Silver US LLC
Kaplan Thomas Scott SSMR Common Stock Tax liability -0.74% -582,022 78,095,918 05 Jun 2026 By Electrum Silver US LLC
Kaplan Thomas Scott SSMR Common Stock Tax liability -0.74% -582,022 78,095,918 05 Jun 2026 By Electrum Silver US LLC
Kaplan Thomas Scott SSMR Common Stock Tax liability -0.74% -582,022 78,095,918 05 Jun 2026 By Electrum Silver US LLC
* marks a reported price that did not pass the local price check.
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