Comparable stake leader
Grupo Villar Mir, S.A.U.
SEC ownership of Ferroglobe PLC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001639877.
Disclosed value leader
Grupo Villar Mir, S.A.U.
Comparable rows
4/50
Latest evidence
30 Sep 2026
- Public ticker
- GSM on Nasdaq
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Grupo Villar Mir, S.A.U.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
4 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Grupo Villar Mir, S.A.U.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
30 Sep 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001639877
- Issuer location
- London
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Ferroglobe PLC (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
Grupo Villar Mir, S.A.U.
Disclosed value leader
Grupo Villar Mir, S.A.U.
Comparable rows
4/50
Latest evidence
30 Sep 2026
13D/G
13F
3/4/5
Lead comparable stake: 36%
46 rows are not safely comparable across share classes.
13D/G row: Grupo Villar Mir, S.A.U.
Showing 1-8 of 50 holder rows.
Quick read
Grupo Villar Mir, S.A.U. leads the comparable SEC ownership view at 36%.
4 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 Grupo Villar Mir, S.A.U.'s linked filing trail.
Comparable ownership
Top 4
Grupo Villar Mir, S.A.U.
36%
COOPER CREEK PARTNERS MANAGEMENT LLC
7.3%
Hosking Partners LLP
5.7%
Wolf Hill Capital Management, LP
3.9%
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 |
|---|---|---|---|---|---|
| Grupo Villar Mir, S.A.U. |
13D/G
|
36%
Reported 13D/G
· 30 Sep 2026
|
$265,346,175
66,755,434 shares
|
$0 | 30 Sep 2026 |
| COOPER CREEK PARTNERS MANAGEMENT LLC |
13F
13D/G
Company
|
7.3%
Reported 13D/G
· 30 Jun 2026
|
$43,297,000
13,615,302 shares
|
— | 30 Jun 2026 |
| Hosking Partners LLP |
13D/G
13F
Company
|
5.7%
Reported 13D/G
· 31 Mar 2025
|
$37,856,075
10,633,729 shares
|
$0 | 31 Mar 2025 |
| Wolf Hill Capital Management, LP |
13D/G
13F
Company
|
3.9%
Reported 13D/G
· 31 Dec 2024
|
$25,762,627
7,236,693 shares
|
$0 | 31 Dec 2024 |
| DONALD SMITH & CO., INC. |
13F
Company
|
—
denominator unverified
|
$25,843,138
8,126,773 shares
|
— | 30 Jun 2026 |
| BlackRock, Inc. |
13F
Company
|
—
denominator unverified
|
$24,177,703
7,603,051 shares
|
— | 30 Jun 2026 |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC |
13F
Company
|
—
denominator unverified
|
$16,262,278
5,113,924 shares
|
— | 30 Jun 2026 |
| Old West Investment Management, LLC |
13F
Company
|
—
denominator unverified
|
$13,360,124
4,201,296 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
Net insider flow leans to buying over the last 12 months. Net value: +$61,792.
Buys
$200,647
Insiders: 2
Sells
$138,856
Insiders: 1
Net
+$61,792
Shares: +19,708
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 52,000
Shares: 32,292
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 32,292 | $0 | $138,856 | -$138,856 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 52,000 | 0 | $200,647 | $0 | +$200,647 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-17 of 17 reporting-owner rows connected to Ferroglobe PLC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
17
Largest Forms 3/4/5 holder
Principal Marco Levi
Net 12M change
+$61,792
Latest report
22 Sep 2026
Recent insider transactions for Ferroglobe PLC
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Silvia Villar-Mir de Fuentes | GSM | ORDINARY SHARES | Tax liability | -6.46% | -6,889 | 99,728 | 22 Sep 2026 | By spouse | ||
| Silvia Villar-Mir de Fuentes | GSM | ORDINARY SHARES | Options Exercise | 35.8% | 28,117 | 106,617 | 22 Sep 2026 | By spouse | ||
| Silvia Villar-Mir de Fuentes | GSM | PERFORMANCE SHARE UNIT | Options Exercise | -100% | -28,117 | 0 | 22 Sep 2026 | By spouse | ||
| Javier Lopez Madrid | GSM | ORDINARY SHARES | Tax liability | -6.46% | -6,889 | 99,728 | 22 Sep 2026 | Direct | ||
| Javier Lopez Madrid | GSM | ORDINARY SHARES | Options Exercise | 35.8% | 28,117 | 106,617 | 22 Sep 2026 | Direct | ||
| Javier Lopez Madrid | GSM | PERFORMANCE SHARE UNIT | Options Exercise | -100% | -28,117 | 0 | 22 Sep 2026 | Direct | ||
| Beatriz Garcia Cos Muntanola | GSM | ORDINARY SHARES | Sale | -50.5% | $138,856 | $4.30 | -32,292 | 31,693 | 14 Aug 2026 | Direct |
| Beatriz Garcia Cos Muntanola | GSM | ORDINARY SHARES | Tax liability | -7.37% | -5,091 | 63,985 | 11 Aug 2026 | Direct | ||
| Beatriz Garcia Cos Muntanola | GSM | ORDINARY SHARES | Options Exercise | 113.9% | 36,784 | 69,076 | 11 Aug 2026 | Direct | ||
| Beatriz Garcia Cos Muntanola | GSM | PERFORMANCE SHARE UNITS | Options Exercise | -100% | -36,784 | 0 | 11 Aug 2026 | Direct | ||
| Silvia Villar-Mir de Fuentes | GSM | Ordinary shares | Purchase | 27.3% | $100,324 | $3.86 | 26,000 | 121,226 | 23 Mar 2026 | By a corporation controlled by spouse |
| Javier Lopez Madrid | GSM | Ordinary shares | Purchase | 21.4% | $100,324 | $3.86 | 26,000 | 147,200 | 23 Mar 2026 | By Financiera Siacapital SL |
* marks a reported price that did not pass the local price check.