Among active 13F managers last quarter, 10 opened and 25 added, while 19 reduced; the largest holder to move was Hosking Partners LLP (−12%). Over the last 180 days, 2 insiders bought and 1 insider sold, a net +$62K in open-market trades.
Funds lean in and no leg opposes.
160 tracked 13F filers disclose a position in GSM as of the latest SEC 13F filings, a combined $306.0M in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Shares | Position value | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Hosking Partners LLP | 10.2M | $32.5M | ▼−12% Reduced · −1.3M sh | Q2 2026 | |
| 2 | Donald Smith & Co., Inc. | 8.1M | $25.8M | ▲+50% Added · +2.7M sh | Q2 2026 | |
| 3 | BlackRock, Inc. | 7.6M | $24.2M | ▲+14% Added · +951K sh | Q2 2026 | |
| 4 | Barrow Hanley Mewhinney & Strauss LLC | 6.1M | $25.0M | ▼−6.0% Reduced · −390K sh | Q1 2026 | |
| 5 | Old West Investment Management, LLC | 4.2M | $13.4M | ▲+7.0% Added · +275K sh | Q2 2026 | |
| 6 | Grizzlyrock Capital, LLC | 3.6M | $11.3M | ▼−1.7% Reduced · −63K sh | Q2 2026 | |
| 7 | Renaissance Technologies LLC | 2.8M | $11.4M | ▼−3.6% Reduced · −104K sh | Q1 2026 | |
| 8 | CenterBook Partners LP | 2.6M | $8.2M | ▲+174% Added · +1.6M sh | Q2 2026 | |
| 9 | Ameriprise Financial Inc | 2.2M | $9.1M | ▼−0.5% Reduced · −11K sh | Q1 2026 | |
| 10 | Dimensional Fund Advisors LP | 2.2M | $9.1M | ▼−1.2% Reduced · −27K sh | Q1 2026 | |
| 11 | State Street Corp | 2.2M | $7.0M | ▲+5.3% Added · +111K sh | Q2 2026 | |
| 12 | Ardsley Advisory Partners LP | 2.2M | $6.9M | ▲New +2.2M sh | Q2 2026 | |
| 13 | Masters Capital Management LLC | 2.0M | $6.4M | —Held | Q2 2026 | |
| 14 | American Century Companies Inc | 1.8M | $7.4M | ▼−22% Reduced · −512K sh | Q1 2026 | |
| 15 | Geode Capital Management, LLC | 1.8M | $5.7M | ▲+12% Added · +186K sh | Q2 2026 | |
| 16 | Gendell Jeffrey L | 1.6M | $5.2M | ▲+80% Added · +729K sh | Q2 2026 | |
| 17 | Jacobs Levy Equity Management, Inc | 1.5M | $4.7M | ▲+15% Added · +190K sh | Q2 2026 | |
| 18 | Charles Schwab Investment Management Inc | 1.5M | $6.1M | ▼−7.7% Reduced · −123K sh | Q1 2026 | |
| 19 | Bridgeway Capital Management, LLC | 1.5M | $4.7M | ▲+4.0% Added · +57K sh | Q2 2026 | |
| 20 | Russell Investments Group, Ltd. | 1.2M | $5.0M | ▼−0.3% Reduced · −3K sh | Q1 2026 | |
| 21 | Millennium Management LLC | 1.0M | $4.3M | ▲Added Added · +1.0M sh | Q1 2026 | |
| 22 | Thomist Capital Management, LP | 922K | $2.9M | ▼−15% Reduced · −162K sh | Q2 2026 | |
| 23 | Empowered Funds, LLC | 879K | $3.6M | ▲+7.5% Added · +61K sh | Q1 2026 | |
| 24 | Vanguard Portfolio Management LLC | 861K | $2.7M | ▲+25% Added · +174K sh | Q2 2026 | |
| 25 | General American Investors Co Inc | 828K | $2.6M | ▼−8.8% Reduced · −80K sh | Q2 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
Last quarter, 10 funds opened a new position in GSM and 25 added to an existing one, while 19 reduced. Based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Their position there |
|---|---|---|
| Microsoft CorpMSFT | 79 funds | $126.8B |
| Nvidia CorpNVDA | 78 funds | $210.2B |
| Amazon.com IncAMZN | 78 funds | $101.8B |
| Meta Platforms Inc-Class AMETA | 78 funds | $58.7B |
| Micron Technology IncMU | 78 funds | $34.9B |
| Apple IncAAPL | 77 funds | $147.2B |
| Broadcom IncAVGO | 77 funds | $88.3B |
| Alphabet Inc-CL AGOOGL | 76 funds | $95.2B |
| JPMorgan Chase & CoJPM | 76 funds | $36.7B |
| Alphabet Inc-CL CGOOG | 75 funds | $68.1B |
| Eli Lilly & CoLLY | 75 funds | $42.4B |
| Chevron CorpCVX | 75 funds | $17.1B |
Ranked by how many of GSM's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in GSM.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Aug 14, 2026 | Garcia Cos Muntanola Beatriz | CHIEF FINANCE OFFICER | Sell (S) | 32K | $139K |
| Mar 23, 2026 | Lopez Madrid Javier | Executive Chairman, Director | Buy (P) | 26K | $100K |
| Mar 23, 2026 | Villar-Mir de Fuentes Silvia | Director | Buy (P) | 26K | $100K |
Where institutional funds (13F), corporate insiders (Form 4) and US House members (STOCK Act) are buying or selling the same name in the same window. Green is buying, red is selling.
Insiders and Congress: last 180 days. Funds: latest 13F, top 100 holders incl. passive
| Source | Buying | Selling | Net |
|---|---|---|---|
13F funds Top 100 holders by value, passive included; the hero counts active managers only | 41 | 39 | – |
Insiders Form 4 open-market | 2 | 1 | +$62K |
US House STOCK Act trades | 0 | 0 | $0 |
Capital Rotation reports where institutional capital disclosed rotating, as of the latest public SEC 13F filings. It is data, not investment advice, a recommendation, or a prediction. Filings lag about 45 days and cover long US equity positions only. Past disclosed flows do not indicate future prices. Do your own research; consult a licensed advisor.
Connected entities for GSM
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/GSM/capital-change-brief"
Use Arkolith's capital_change_brief for GSM. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for GSM. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.