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- Cos Muntanola Beatriz Garcia - OfficerOpen-market sale$139K
de Fuentes Silvia Villar-Mir - DirectorOpen-market purchase$100K
About Ferroglobe PLC (GSM)
Ferroglobe PLC is an SEC registrant, filing under CIK 0001639877, classified as metal mining. It is grouped with Materials companies on this site.
GSM Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 1 | 32,292 | $139K |
| Option exercise | 6 | 186,036 | |
| Tax withholding / forfeiture | 3 | 18,869 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
GSM insider transactions (Form 4)
125 Form 4 filings on record, the earliest from Mar 25, 2026, newest first.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| de Fuentes Silvia Villar-Mir - Director | Tax withholding / forfeiture | ORDINARY SHARES | 6,889 | $4.31 | $30K | |
| de Fuentes Silvia Villar-Mir - Director | Option exercise | ORDINARY SHARES | 28,117 | $0.00 | - | |
| de Fuentes Silvia Villar-Mir - Director | Option exercise | PERFORMANCE SHARE UNIT | 28,117 | $0.00 | - | |
| Madrid Javier Lopez - Officer | Option exercise | ORDINARY SHARES | 28,117 | $0.00 | - | |
| Madrid Javier Lopez - Officer | Tax withholding / forfeiture | ORDINARY SHARES | 6,889 | $4.31 | $30K | |
| Madrid Javier Lopez - Officer | Option exercise | PERFORMANCE SHARE UNIT | 28,117 | $0.00 | - | |
| Cos Muntanola Beatriz Garcia - Officer | Option exercise | ORDINARY SHARES | 36,784 | $0.00 | - | |
| Cos Muntanola Beatriz Garcia - Officer | Tax withholding / forfeiture | ORDINARY SHARES | 5,091 | $4.63 | $24K | |
| Cos Muntanola Beatriz Garcia - Officer | Open-market sale | ORDINARY SHARES | 32,292 | $4.30 | $139K | |
| Cos Muntanola Beatriz Garcia - Officer | Option exercise | PERFORMANCE SHARE UNITS | 36,784 | $0.00 | - | |
| de Fuentes Silvia Villar-Mir - Director | Open-market purchase | Ordinary shares | 26,000 | $3.86 | $100K | |
| Madrid Javier Lopez - Officer | Open-market purchase | Ordinary shares | 26,000 | $3.86 | $100K |
GSM insider trading FAQ
What is the latest insider trade for GSM?
Ferroglobe PLC (GSM) had 3 insider filings in the last 90 days, with the most recent on 2026-09-24. The full record for GSM runs to 5 Form 4 filings, the earliest from 2026-03-25. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying GSM stock?
No insider purchases of GSM were filed in the last 90 days. 2 purchases are on record for this company.
How many insiders are selling GSM stock?
1 insider sale of GSM was filed in the last 90 days, totaling $139K.
Where can I see GSM SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects GSM Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Materials companies with insider activity
Recent insider filings
5The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - de Fuentes Silvia Villar-Mir view on EDGAR
- - Madrid Javier Lopez view on EDGAR
- - Cos Muntanola Beatriz Garcia view on EDGAR
- - de Fuentes Silvia Villar-Mir view on EDGAR
- - Madrid Javier Lopez view on EDGAR
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Learn more
- Insider selling: signal or noise?
- Why most insider sales are routine, and the few patterns worth a second look.
- Insider activity in Materials
- Where GSM's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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