Nasdaq · CIK 0001639877
GSM Ferroglobe PLC
Insider trading from SEC Form 4. Last filing 19 d ago. Close $4.24 on Oct 9, 2026, +36% from the 52-week low and -23% from the high.
In brief
Ferroglobe PLC (GSM) has 5 SEC Form 4 filings on file from 3 insiders, the latest filed on Sep 24, 2026. In the last 90 days insiders made 0 open-market buys worth $0 and 1 open-market sell worth $139k, net -$139k.
3 open-market trades have been scored at GSM. The newest: Cos Muntanola Beatriz Garcia (CHIEF FINANCE OFFICER) sold $139k of stock on Aug 14, 2026, filed Aug 20, 2026, scored 38 (weak). 2 insiders bought within 14 days of each other around Mar 23, 2026.
Last 90 days
Price and insider trades, last year
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
Open-market buys and sells at Ferroglobe PLC, scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 38Weak | Cos Muntanola Beatriz Garcia CHIEF FINANCE OFFICER sell | $139k 32,292 shares | -50% | +40% from low-20% from high | |
| 44Moderate | Madrid Javier Lopez Executive Chairman buy | $100k 26,000 shares | +21% | - | |
| 39Weak | de Fuentes Silvia Villar-Mir director buy | $100k 26,000 shares | +27% | - |
Transactions
Every row filed, 12 in all.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 22, 2026 | Madrid Javier Lopez EXECUTIVE CHAIRMAN | MOption exercise ORDINARY SHARES | +28,117 | $0.00 | $0 | 106,617 | 19 d ago |
| Sep 22, 2026 | de Fuentes Silvia Villar-Mir director | MOption exercise ORDINARY SHARESindirect: By spouse | +28,117 | $0.00 | $0 | 106,617 | 19 d ago |
| Sep 22, 2026 | Madrid Javier Lopez EXECUTIVE CHAIRMAN | FTax withholding ORDINARY SHARES | -6,889 | $4.31 | $30k | 99,728 | 19 d ago |
| Sep 22, 2026 | de Fuentes Silvia Villar-Mir director | FTax withholding ORDINARY SHARESindirect: By spouse | -6,889 | $4.31 | $30k | 99,728 | 19 d ago |
| Sep 22, 2026 | Madrid Javier Lopez EXECUTIVE CHAIRMAN | MOption exercise PERFORMANCE SHARE UNITderivative | -28,117 | $0.00 | $0 | 0 | 19 d ago |
| Sep 22, 2026 | de Fuentes Silvia Villar-Mir director | MOption exercise PERFORMANCE SHARE UNITderivativeindirect: By spouse | -28,117 | $0.00 | $0 | 0 | 19 d ago |
| Aug 11, 2026 | Cos Muntanola Beatriz Garcia CHIEF FINANCE OFFICER | MOption exercise ORDINARY SHARES | +36,784 | $0.00 | $0 | 69,076 | Aug 20, 2026 |
| Aug 11, 2026 | Cos Muntanola Beatriz Garcia CHIEF FINANCE OFFICER | FTax withholding ORDINARY SHARES | -5,091 | $4.63 | $24k | 63,985 | Aug 20, 2026 |
| Aug 14, 2026 | Cos Muntanola Beatriz Garcia CHIEF FINANCE OFFICER | SOpen-market sale ORDINARY SHARES | -32,292 | $4.30 | $139k | 31,693 | Aug 20, 2026 |
| Aug 11, 2026 | Cos Muntanola Beatriz Garcia CHIEF FINANCE OFFICER | MOption exercise PERFORMANCE SHARE UNITSderivative | -36,784 | $0.00 | $0 | 0 | Aug 20, 2026 |
| Mar 23, 2026 | Madrid Javier Lopez Executive Chairman | POpen-market purchase Ordinary sharesindirect: By Financiera Siacapital SL | +26,000 | $3.86 | $100k | 147,200 | Mar 25, 2026 |
| Mar 23, 2026 | de Fuentes Silvia Villar-Mir director | POpen-market purchase Ordinary sharesindirect: By a corporation controlled by spouse | +26,000 | $3.86 | $100k | 121,226 | Mar 25, 2026 |
Insiders
Everyone who has filed a Form 4 here.
- Cos Muntanola Beatriz GarciaCHIEF FINANCE OFFICER
- Madrid Javier LopezExecutive Chairman
- de Fuentes Silvia Villar-Mirdirector
Questions about GSM
Answered from the filings on this page, as of the latest one.
Are insiders buying GSM?
As of Sep 24, 2026, SEC Form 4 filings show 0 open-market buys worth $0 by 0 insiders and 1 open-market sell worth $139k by 1 insider at Ferroglobe PLC in the last 90 days, net -$139k. Only purchases (code P) and sales (code S) count; grants, option exercises and tax withholding do not.
Who was the last insider to trade GSM on the open market?
Cos Muntanola Beatriz Garcia (CHIEF FINANCE OFFICER) sold $139k of GSM on Aug 14, 2026 and filed the Form 4 on Aug 20, 2026. InsiderTell scored 38 (weak).
How many insiders file Form 4 at Ferroglobe PLC?
3 people have filed a Form 4 at Ferroglobe PLC, among them Cos Muntanola Beatriz Garcia (CHIEF FINANCE OFFICER), Madrid Javier Lopez (Executive Chairman), de Fuentes Silvia Villar-Mir (director). Officers, directors and holders of more than 10% of a share class must report their trades within two business days.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.