Silvia Villar-Mir de Fuentes - 22 Sep 2026 Form 4 Insider Report for Ferroglobe PLC (GSM)

Reporting relationship: Director
Issuer ticker: GSM
Reported as of: 22 Sep 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 24 Sep 2026, 16:01:24 UTC
Prior SEC filing: 25 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Marta Bragado, attorney-in-fact for Silvia Villar-Mir de Fuentes

Key filing fact

Silvia Villar-Mir de Fuentes filed Form 4 for Ferroglobe PLC (GSM) on 24 Sep 2026.

Key facts

This page summarizes Silvia Villar-Mir de Fuentes's Form 4 filing for Ferroglobe PLC (GSM).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 24 Sep 2026, 16:01.

Change

Previous filing in this sequence was filed on 25 Mar 2026.
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

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002116270 Primary reporting owner

Villar-Mir de Fuentes Silvia

Relationship: Director
Address: THE SCALPEL, 18TH FLOOR, 52 LIME STREET, LONDON, UNITED KINGDOM
Signature: /s/ Marta Bragado, attorney-in-fact for Silvia Villar-Mir de Fuentes
Signature date: 24 Sep 2026

Reported non-derivative transactions

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

GSM transaction

ORDINARY SHARES

Options Exercise

Transaction value
Shares: +28,117
Change %: +36%
Price: $0.000000^*
Shares after: 106,617
Date: 22 Sep 2026
Ownership: By spouse

GSM transaction

ORDINARY SHARES

Tax liability

Transaction value
Shares: -6,889
Change %: -6.5%
Price: $4.31^*
Shares after: 99,728
Date: 22 Sep 2026
Ownership: By spouse

GSM holding

ORDINARY SHARES

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 147,200
Date: 22 Sep 2026
Ownership: By a corporation controlled by spouse
Footnotes: F1

GSM holding

ORDINARY SHARES

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 73,890
Date: 22 Sep 2026
Ownership: By Panarea Capital SL

GSM holding

ORDINARY SHARES

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 100
Date: 22 Sep 2026
Ownership: Direct

Reported derivative securities

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

GSM transaction Derivative

PERFORMANCE SHARE UNIT

Options Exercise

Transaction value
Shares: -28,117
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 22 Sep 2026
Ownership: By spouse
Underlying class: ORDINARY SHARES
Underlying amount: 28,117
Exercise price: $0.000000

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

The amount reported reflects the correction of an inadvertent arithmetic error in the holdings reported on the Form 4 filed March 25, 2026, which understated holdings by 25,974 shares.