Mustard Seed Investor logo: a sprouting mustard seedMustard Seed Investor
← All stocks
GSMMaterialsCommon Stock

Ferroglobe PLC

Held by 11 tracked managers as of Q2 2026 · CUSIP ⓘCUSIP: A 9-character ID for one specific security - one share class of one company, or one bond. Tickers can change and can mean different things in different countries; a CUSIP always identifies exactly the same security, which is why filings use it. Guide G33856108 · Sector ⓘGICS sectors: The 11-sector system most investors know (Global Industry Classification Standard): Technology, Health Care, Financials and so on. This site assigns each company a GICS-style sector from its SIC code, with a few hand corrections, so sector pages match the names investors expect. Guide

Download report
In plain English: 11 of the investors we track own this stock. In the latest quarter, 6 of them bought more of it and 6 sold some or all of theirs (1 bought it for the first time). That tells you what they did last quarter — not what the stock will do next.

Educational and informational only, not personalized investment advice. Based on public filings that may be delayed or contain errors; verify with the original filings. Disclaimer

Managers holding
11
0 vs last quarter (like-for-like)
Total value held
$44.01M
Across tracked managers
Average weight ⓘOn average, how big this stock is in the portfolios that own it (its share of each manager's reported portfolio value).
0.2%
Of each manager's book
QoQ value ⓘLike-for-like: only managers that filed both quarters are compared, so a manager filing late (or confidentially) does not look like buying or selling. Includes price changes.
-$28.86M
-39.6% vs last quarter
Net shares bought
-3.8M
Est. net flow -$14.19M
Quarter activity
6 bought · 6 sold
1 new · 1 sold out

Tracked capital in this stock

Total value held (area) and number of managers (line). Dips can mean a large holder filed that quarter confidentially (e.g. Norges Bank in Q1/Q3).

Chart: Tracked capital in this stock

Aggregate buying and selling

Net share change reported each quarter

Chart: Aggregate buying and selling

Who owns GSM?

🔒 The 'who added and who trimmed' chart is a Plus feature

You're viewing the Free plan. Upgrade to unlock The 'who added and who trimmed' chart — every paid plan starts with a 7-day free trial, and you can cancel in two clicks.

See plans & upgrade Sign in

Who owns GSM? — Q2 2026

Holders ranked by position size, with each one's quarter-over-quarter change.

CSV Excel
Column filters

Numbers accept 1.5M, 2B, 250K. Percent columns take percent (5 = 5%).

# Manager Fund Shares Value ↓ % of their portfolio QoQ Δ shares Δ shares % Est. Δ value ⓘChange in shares × this quarter's price
1 Barrow Hanley Barrow Hanley Mewhinney & Strauss 5.11M $16.26M 0.0% Reduced -961.1K -15.8% -$3.06M
2 Jim Simons Renaissance Technologies 2.64M $8.39M 0.0% Reduced -129.5K -4.7% -$411.81K
3 Chuck Royce Royce & Associates 1.91M $6.08M 0.0% Reduced -435.5K -18.5% -$1.38M
4 Bridgeway Bridgeway Capital Management 1.47M $4.68M 0.1% Added +57.1K +4.0% +$181.55K
5 David Shaw D.E. Shaw & Co. 871.02K $2.77M 0.0% Added +670.6K +334.5% +$2.13M
6 Orchard Capital Orchard Capital Management 690.00K $2.19M 2.4% Added +8.3K +1.2% +$26.25K
7 Israel Englander Millennium Management 456.82K $1.45M 0.0% Reduced -582.6K -56.1% -$1.85M
8 Boston Partners Boston Partners Global Investors 407.40K $1.30M 0.0% Added +56.0K +15.9% +$177.98K
9 Ken Griffin Citadel Advisors 183.97K $585.01K 0.0% Reduced -527.5K -74.1% -$1.68M
10 Steve Cohen Point72 Asset Management 78.06K $248.24K 0.0% New +78.1K — +$248.24K
11 Two Sigma Two Sigma Investments 13.20K $41.98K 0.0% Added +1.9K +16.8% +$6.04K

Sold out completely this quarter

CSV Excel
Column filters

Numbers accept 1.5M, 2B, 250K. Percent columns take percent (5 = 5%).

Manager Fund Shares sold Value last quarter ↓
Matthew McLennan First Eagle Investment Management -2.1M $8.58M

Politician trades

Politician trades in GSM

CSV Excel
Column filters

Numbers accept 1.5M, 2B, 250K. Percent columns take percent (5 = 5%).

No politician trades match these filters.