Form4insider filings, from the source

Insider · CIK 0002116273

Cos Muntanola Beatriz Garcia

Files at: GSM. On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $139k · 1net −$139k
$10k$10k$100k$100k$1M$1MbuyssalesAug 13Aug 13Aug 13Aug 14Aug 14Aug 14Aug 15

Reported trades — common stock

TradeReported (ET)CompanySharesAvg priceTotalOwned afterΔ stakeFlags
Aug 14, 2026 SForm 4 →Aug 20, 9:26 am EDTFerroglobe PLCGSM32,292$4.30$138,85631,693−50.5% late
Aug 11, 2026 FMForm 4 →Aug 20, 9:26 am EDTFerroglobe PLCGSM41,875$4.63$23,57163,985— late

Reported trades — derivatives (options, RSUs, warrants)

TradeReported (ET)CompanySharesAvg priceTotalOwned afterΔ stakeFlags
Aug 11, 2026 MForm 4 →Aug 20, 9:26 am EDTFerroglobe PLCGSM36,784——0— late