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/MAGN/capital-change-brief"
Use Arkolith's capital_change_brief for MAGN. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Newtyn Management, LLC | $26.2M | 2.8M | ▲+17% Added · +400K sh | Q1 2026 | |
| 2 | BlackRock, Inc. | $22.7M | 2.4M | ▲+0.6% Added · +14K sh | Q1 2026 | |
| 3 | Engine Capital Management, LP | $21.3M | 2.2M | —Held | Q1 2026 | |
| 4 | MORGAN STANLEY | $18.7M | 2.0M | ▼−19% Reduced · −455K sh | Q1 2026 | |
| 5 | Madison Avenue Partners, LP | $15.1M | 1.6M | ▼−11% Reduced · −190K sh | Q1 2026 | |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | $14.6M | 1.5M | ▲New +1.5M sh | Q1 2026 | |
| 7 | Diameter Capital Partners LP | $11.5M | 1.2M | —Held | Q1 2026 | |
| 8 | D. E. Shaw & Co., Inc. | $8.5M | 896K | ▲+11% Added · +91K sh | Q1 2026 | |
| 9 | JPMORGAN CHASE & CO | $7.4M | 829K | ▲+230% Added · +578K sh | Q1 2026 | |
| 10 | CANYON CAPITAL ADVISORS LLC | $7.7M | 810K | —Held | Q1 2026 | |
| 11 | GEODE CAPITAL MANAGEMENT, LLC | $7.4M | 780K | ▲+4.6% Added · +34K sh | Q1 2026 | |
| 12 | Clearline Capital LP | $7.0M | 738K | ▲+12% Added · +78K sh | Q1 2026 | |
| 13 | Ancora Advisors LLC | $6.9M | 721K | ▲+69% Added · +296K sh | Q1 2026 | |
| 14 | STATE STREET CORP | $6.2M | 657K | ▲+2.5% Added · +16K sh | Q1 2026 | |
| 15 | JACOBS LEVY EQUITY MANAGEMENT, INC | $5.0M | 525K | ▼−33% Reduced · −261K sh | Q1 2026 | |
| 16 | AMERIPRISE FINANCIAL INC | $4.8M | 509K | ▼−2.2% Reduced · −11K sh | Q1 2026 | |
| 17 | Russell Investments Group, Ltd. | $4.8M | 507K | ▲+38% Added · +139K sh | Q1 2026 | |
| 18 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $4.3M | 454K | ▲+13% Added · +51K sh | Q1 2026 | |
| 19 | Verition Fund Management LLC | $4.1M | 432K | ▲+31% Added · +102K sh | Q1 2026 | |
| 20 | J. Goldman & Co LP | $3.7M | 387K | ▼−28% Reduced · −151K sh | Q1 2026 | |
| 21 | GOLDMAN SACHS GROUP INC | $3.5M | 363K | ▼−54% Reduced · −426K sh | Q1 2026 | |
| 22 | CITADEL ADVISORS LLC | $3.0M | 315K | ▼−43% Reduced · −236K sh | Q1 2026 | |
| 23 | VANGUARD PORTFOLIO MANAGEMENT LLC | $3.0M | 314K | ▲New +314K sh | Q1 2026 | |
| 24 | BNP PARIBAS FINANCIAL MARKETS | $2.9M | 305K | ▲+8.9% Added · +25K sh | Q1 2026 | |
| 25 | LOEWS CORP | $2.9M | 300K | —Held | 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 |
|---|---|---|---|---|---|
| Mar 9, 2026 | Brown Bruce | Director | Grant (A) | 13K | $0 |
| Mar 9, 2026 | Fahnemann Thomas | Director | Grant (A) | 13K | $0 |
| Mar 9, 2026 | Fogarty Kevin Michael | Director | Grant (A) | 13K | $0 |
| Mar 9, 2026 | Curless Michael S | Director | Grant (A) | 13K | $0 |
| Mar 9, 2026 | Hall Mary Dean | Director | Grant (A) | 13K | $0 |
| Mar 9, 2026 | Marnick Samantha J. | Director | Grant (A) | 13K | $0 |
| Mar 9, 2026 | Salmon Tom | Director | Grant (A) | 13K | $0 |
| Mar 9, 2026 | RICKERTSEN CARL J | Director | Grant (A) | 13K | $0 |
| Feb 28, 2026 | Urey Jill L. | EVP, GC & Corp Sec | Option exercise (M) | 2K | $20K |
| Feb 28, 2026 | Urey Jill L. | EVP, GC & Corp Sec | Tax withholding (F) | 521 | $7K |
| Feb 28, 2026 | Urey Jill L. | EVP, GC & Corp Sec | Option exercise (M) | 2K | $0 |
| Feb 24, 2026 | Urey Jill L. | EVP, GC & Corp Sec | Option exercise (M) | 205 | $3K |
| Class | 13F holders | Value held |
|---|---|---|
| MAGNthis pagecs | 141 funds | $279.2M |
| 55939AAA5Corporate Bond - Domestic | 1 funds | $87K |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
| Company | Co-held by | Combined value |
|---|---|---|
| AMAZON.COM INCAMZN | 59 funds | $17.4B |
| META PLATFORMS INC-CLASS AMETA | 59 funds | $9.9B |
| MICROSOFT CORPMSFT | 58 funds | $22.6B |
| ALPHABET INC-CL AGOOGL | 58 funds | $14.8B |
| CAPITAL ONE FINANCIAL CORPCOF | 58 funds | $1.3B |
| NVIDIA CORPNVDA | 57 funds | $35.1B |
| APPLE INCAAPL | 57 funds | $28.0B |
| BROADCOM INCAVGO | 57 funds | $11.8B |
| TESLA INCTSLA | 57 funds | $6.4B |
| ELI LILLY & COLLY | 57 funds | $6.2B |
| MICRON TECHNOLOGY INCMU | 57 funds | $4.7B |
| NETFLIX INCNFLX | 57 funds | $2.9B |
Ranked by how many of MAGN'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 MAGN. 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.