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/MGY/capital-change-brief"
Use Arkolith's capital_change_brief for MGY. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $931.0M | 29.5M | ▲+6.6% Added · +1.8M sh | Q1 2026 | |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC | $409.9M | 13.0M | ▲New +13.0M sh | Q1 2026 | |
| 3 | AMERICAN CENTURY COMPANIES INC | $331.8M | 10.5M | ▼−4.7% Reduced · −521K sh | Q1 2026 | |
| 4 | STATE STREET CORP | $299.8M | 9.5M | ▲+7.9% Added · +695K sh | Q1 2026 | |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | $226.9M | 7.2M | ▲New +7.2M sh | Q1 2026 | |
| 6 | DIMENSIONAL FUND ADVISORS LP | $221.9M | 7.0M | ▲+5.9% Added · +394K sh | Q1 2026 | |
| 7 | JANUS HENDERSON GROUP PLC | $198.2M | 6.3M | ▲+2.8% Added · +170K sh | Q1 2026 | |
| 8 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $197.7M | 6.3M | ▲+791% Added · +5.6M sh | Q1 2026 | |
| 9 | T. Rowe Price Investment Management, Inc. | Withheld | 5.2M | ▲+30% Added · +1.2M sh | Q1 2026 | |
| 10 | TD ASSET MANAGEMENT INC | $156.0M | 4.9M | ▼−13% Reduced · −730K sh | Q1 2026 | |
| 11 | GEODE CAPITAL MANAGEMENT, LLC | $143.3M | 4.5M | ▲+2.3% Added · +102K sh | Q1 2026 | |
| 12 | ALLIANCEBERNSTEIN L.P. | $97.4M | 4.5M | ▼−6.2% Reduced · −296K sh | Q1 2026 | |
| 13 | Epoch Investment Partners, Inc. | $135.0M | 4.3M | ▼−20% Reduced · −1.1M sh | Q1 2026 | |
| 14 | BANK OF AMERICA CORP /DE/ | $122.4M | 3.9M | ▲+20% Added · +659K sh | Q1 2026 | |
| 15 | Boston Trust Walden Corp | $101.9M | 3.2M | ▼−23% Reduced · −940K sh | Q1 2026 | |
| 16 | GOLDMAN SACHS GROUP INC | $98.9M | 3.1M | ▲+41% Added · +906K sh | Q1 2026 | |
| 17 | VICTORY CAPITAL MANAGEMENT INC | $97.6M | 3.1M | ▼−14% Reduced · −501K sh | Q1 2026 | |
| 18 | MORGAN STANLEY | $95.6M | 3.0M | ▲+8.3% Added · +231K sh | Q1 2026 | |
| 19 | SYSTEMATIC FINANCIAL MANAGEMENT LP | $88.8M | 2.8M | ▼−4.3% Reduced · −126K sh | Q1 2026 | |
| 20 | Allspring Global Investments Holdings, LLC | $81.4M | 2.7M | ▼−7.9% Reduced · −232K sh | Q1 2026 | |
| 21 | SILVERCREST ASSET MANAGEMENT GROUP LLC | $84.2M | 2.7M | ▼−20% Reduced · −666K sh | Q1 2026 | |
| 22 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $82.5M | 2.6M | ▲+4.8% Added · +121K sh | Q1 2026 | |
| 23 | Nuveen, LLC | $71.1M | 2.3M | ▲+24% Added · +434K sh | Q1 2026 | |
| 24 | LOOMIS SAYLES & CO L P | $68.8M | 2.2M | ▼−6.0% Reduced · −138K sh | Q1 2026 | |
| 25 | Stephens Investment Management Group LLC | $68.6M | 2.2M | ▲+0.8% Added · +18K sh | Q1 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.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jun 1, 2026 | Szabo Shandell | Director | Buy (P) | 86 | $2K |
| Jun 1, 2026 | Acosta Arcilia | Director | Grant (A) | 72 | $0 |
| May 8, 2026 | Acosta Arcilia | Director | Grant (A) | 6K | $0 |
| May 8, 2026 | DJEREJIAN EDWARD P | Director | Grant (A) | 6K | $0 |
| May 8, 2026 | SMITH DAN F | Director | Grant (A) | 8K | $0 |
| May 8, 2026 | Szabo Shandell | Director | Grant (A) | 6K | $0 |
| May 8, 2026 | Ropp Ralph Lewis | Director | Grant (A) | 6K | $0 |
| May 8, 2026 | LARSON JAMES R | Director | Grant (A) | 6K | $0 |
| May 8, 2026 | Khani David M. | Director | Grant (A) | 6K | $0 |
| Mar 30, 2026 | Szabo Shandell | Director | Sell (S) | 12K | $375K |
| Mar 10, 2026 | DJEREJIAN EDWARD P | Director | Sell (S) | 18K | $522K |
| Mar 9, 2026 | SMITH DAN F | Director | Sell (S) | 18K | $522K |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 143 funds | $55.6B |
| ALPHABET INC-CL AGOOGL | 139 funds | $36.8B |
| META PLATFORMS INC-CLASS AMETA | 139 funds | $24.5B |
| NVIDIA CORPNVDA | 138 funds | $78.9B |
| AMAZON.COM INCAMZN | 138 funds | $42.6B |
| JPMORGAN CHASE & COJPM | 138 funds | $18.6B |
| VISA INC-CLASS A SHARESV | 138 funds | $12.0B |
| APPLE INCAAPL | 137 funds | $66.6B |
| CHEVRON CORPCVX | 136 funds | $8.6B |
| BROADCOM INCAVGO | 135 funds | $28.8B |
| ALPHABET INC-CL CGOOG | 135 funds | $24.6B |
| MASTERCARD INC - AMA | 135 funds | $10.7B |
Ranked by how many of MGY's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for MGY. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes. Every panel above is one call to the Arkolith API & MCP server.