GSM insider buying
1 cluster buyFerroglobe PLC · Materials
When two or more insiders at Ferroglobe PLC buy GSM on the open market around the same time, that clustered conviction is one of the highest-signal patterns in SEC filing data. Below is every cluster we've detected in GSM plus the full record of qualifying open-market buys, each parsed directly from Form 4 filings and linked back to the source on SEC EDGAR.
Detected clusters
- Mar 23 – Mar 23, 2026Detected Mar 23, 20262 insidersTotal bought$200.7KMarket cap$614.0M
All notable open-market buys in GSM
Every open-market Form 4 purchase, newest first. Click an insider to see their full buying record across companies.
| Date | Insider | Shares | Price | Value | Filing |
|---|---|---|---|---|---|
| Mar 23, 2026 | Lopez Madrid Javiercluster Director, Executive Chairman | 26,000 | $3.86 | $100.4K | SEC ↗ |
| Mar 23, 2026 | Villar-Mir de Fuentes Silviacluster Director | 26,000 | $3.86 | $100.4K | SEC ↗ |
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GSM insider buying — FAQ
- Are insiders buying GSM stock?
- Yes — 2 distinct insiders have bought GSM (Ferroglobe PLC) on the open market, including 1 cluster buy where two or more insiders bought within a rolling window. The most recent qualifying activity was Mar 25, 2026.
- How much GSM stock have insiders bought?
- Insiders have bought a combined $200.7K of GSM across 2 open-market purchases, based on SEC Form 4 filings.
- What is an insider cluster buy in GSM?
- A cluster buy is two or more distinct Ferroglobe PLC insiders — officers, directors, or 10% owners — each buying GSM on the open market within a rolling window. GSM has 1 detected cluster buy to date.
- Where does this GSM insider trading data come from?
- Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.
How we track insider buying in GSM
We continuously poll SEC EDGAR for new Form 4 filings and parse every open-market purchase (transaction code P). A cluster is recorded when two or more distinct insiders — officers, directors, or 10% owners — each buy GSM within a rolling window. We track clusters at every company size, from micro-caps to mega-caps. Every figure on this page traces back to an official filing; open any row to jump straight to the source document. What counts as a cluster buy?
This page is informational and reflects public filing data. It is not investment advice or a recommendation regarding GSM.