161 tracked 13F filers disclose a position in MAGN as of the latest SEC 13F filings, a combined $316.5M 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 | 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 | →First observed position No prior filed position | Q1 2026 | |
| 7 | Diameter Capital Partners LP | $14.2M | 1.2M | —Held | Q2 2026 | |
| 8 | DG Capital Management, LLC | $12.9M | 1.1M | ▼−8.8% Reduced · −106K sh | Q2 2026 | |
| 9 | D. E. Shaw & Co., Inc. | $8.5M | 896K | ▲+11% Added · +91K sh | Q1 2026 | |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | $10.1M | 862K | ▲+11% Added · +82K sh | Q2 2026 | |
| 11 | JPMORGAN CHASE & CO | $7.4M | 829K | ▲+230% Added · +578K sh | Q1 2026 | |
| 12 | CANYON CAPITAL ADVISORS LLC | $9.5M | 810K | —Held | Q2 2026 | |
| 13 | Clearline Capital LP | $7.0M | 738K | ▲+12% Added · +78K sh | Q1 2026 | |
| 14 | STATE STREET CORP | $7.9M | 672K | ▲+2.3% Added · +15K sh | Q2 2026 | |
| 15 | JB CAPITAL PARTNERS LP | $7.7M | 655K | —Held | Q2 2026 | |
| 16 | Verition Fund Management LLC | $7.1M | 607K | ▲+40% Added · +175K sh | Q2 2026 | |
| 17 | JACOBS LEVY EQUITY MANAGEMENT, INC | $5.0M | 525K | ▼−33% Reduced · −261K sh | Q1 2026 | |
| 18 | AMERIPRISE FINANCIAL INC | $4.8M | 509K | ▼−2.2% Reduced · −11K sh | Q1 2026 | |
| 19 | Russell Investments Group, Ltd. | $4.8M | 507K | ▲+38% Added · +139K sh | Q1 2026 | |
| 20 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $4.3M | 454K | ▲+13% Added · +51K sh | Q1 2026 | |
| 21 | ALGERT GLOBAL LLC | $5.3M | 447K | ▲+14% Added · +54K sh | Q2 2026 | |
| 22 | J. Goldman & Co LP | $3.7M | 387K | ▼−28% Reduced · −151K sh | Q1 2026 | |
| 23 | Ancora Advisors LLC | $4.4M | 371K | ▼−49% Reduced · −350K sh | Q2 2026 | |
| 24 | GOLDMAN SACHS GROUP INC | $3.5M | 363K | ▼−54% Reduced · −426K sh | Q1 2026 | |
| 25 | CITADEL ADVISORS LLC | $3.0M | 315K | ▼−43% Reduced · −236K 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.
Last quarter, 10 funds opened a new position in MAGN and 23 added to an existing one, while 16 reduced and 0 exited entirely — 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 | Combined value |
|---|---|---|
| AMAZON.COM INCAMZN | 79 funds | $107.5B |
| META PLATFORMS INC-CLASS AMETA | 79 funds | $63.4B |
| NVIDIA CORPNVDA | 78 funds | $225.6B |
| MICROSOFT CORPMSFT | 78 funds | $153.5B |
| ALPHABET INC-CL AGOOGL | 78 funds | $87.5B |
| MICRON TECHNOLOGY INCMU | 78 funds | $20.5B |
| APPLE INCAAPL | 76 funds | $168.1B |
| BROADCOM INCAVGO | 75 funds | $91.1B |
| TESLA INCTSLA | 75 funds | $40.7B |
| ELI LILLY & COLLY | 74 funds | $43.9B |
| ADVANCED MICRO DEVICESAMD | 74 funds | $19.8B |
| INTEL CORPINTC | 74 funds | $10.4B |
Ranked by how many of MAGN's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jun 5, 2025 | Marnick Samantha J. | Director | Buy (P) | 4K | $50K |
| Jun 4, 2025 | Curless Michael S | Director | Buy (P) | 10K | $123K |
| May 29, 2025 | Brown Bruce | Director | Buy (P) | 17K | $200K |
| May 28, 2025 | Salmon Tom | Director | Buy (P) | 17K | $203K |
| May 15, 2025 | RICKERTSEN CARL J | Director | Buy (P) | 20K | $273K |
| May 12, 2025 | Fogarty Kevin Michael | Director | Buy (P) | 20K | $303K |
| May 9, 2025 | Begle Curt | President & CEO, Director | Buy (P) | 20K | $284K |
| Feb 27, 2025 | RICKERTSEN CARL J | Director | Buy (P) | 20K | $407K |
| Feb 11, 2025 | Begle Curt | President & CEO, Director | Buy (P) | 24K | $501K |
| Class | 13F holders | Value held |
|---|---|---|
| MAGNthis pagecs | 161 funds | $316.5M |
| 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.
Connected entities for MAGN
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.
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.