140 tracked 13F filers disclose a position in MGTX as of the latest SEC 13F filings, a combined $738.3M 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 | Sanofi | $164.8M | 12.2M | —Held | Q2 2026 | |
| 2 | PERCEPTIVE ADVISORS LLC | $89.3M | 10.3M | —Held | Q1 2026 | |
| 3 | Rubric Capital Management LP | $60.6M | 7.0M | ▲+13% Added · +825K sh | Q1 2026 | |
| 4 | JOHNSON & JOHNSON | $89.7M | 6.6M | —Held | Q2 2026 | |
| 5 | ADAGE CAPITAL PARTNERS GP, L.L.C. | $34.6M | 4.0M | —Held | Q1 2026 | |
| 6 | MILLENNIUM MANAGEMENT LLC | $30.0M | 3.5M | ▲+9.1% Added · +289K sh | Q1 2026 | |
| 7 | BlackRock, Inc. | $27.4M | 3.2M | ▲+3.2% Added · +98K sh | Q1 2026 | |
| 8 | Prosight Management, LP | $22.8M | 2.6M | ▼−18% Reduced · −580K sh | Q1 2026 | |
| 9 | 683 Capital Management, LLC | $31.1M | 2.3M | ▼−6.1% Reduced · −150K sh | Q2 2026 | |
| 10 | Opaleye Management Inc. | $18.4M | 2.1M | ▲+443% Added · +1.7M sh | Q1 2026 | |
| 11 | MORGAN STANLEY | $13.8M | 1.6M | ▼−13% Reduced · −239K sh | Q1 2026 | |
| 12 | STATE STREET CORP | $18.8M | 1.4M | ▲+85% Added · +640K sh | Q2 2026 | |
| 13 | Knoll Capital Management, LLC | $10.8M | 1.3M | —Held | Q1 2026 | |
| 14 | KENNEDY CAPITAL MANAGEMENT LLC | $7.4M | 858K | ▲12× Added · +788K sh | Q1 2026 | |
| 15 | HEIGHTS CAPITAL MANAGEMENT, INC | $11.5M | 850K | ▲New +850K sh | Q2 2026 | |
| 16 | GEODE CAPITAL MANAGEMENT, LLC | $11.5M | 849K | ▲+45% Added · +264K sh | Q2 2026 | |
| 17 | Logos Global Management LP | $6.1M | 700K | ▲New +700K sh | Q1 2026 | |
| 18 | Erste Asset Management GmbH | $8.7M | 691K | ▼−4.0% Reduced · −29K sh | Q2 2026 | |
| 19 | Long Focus Capital Management, LLC | $4.5M | 525K | —Held | Q1 2026 | |
| 20 | PFM Health Sciences, LP | $6.2M | 455K | ▲New +455K sh | Q2 2026 | |
| 21 | GOLDMAN SACHS GROUP INC | $3.8M | 441K | ▼−3.4% Reduced · −15K sh | Q1 2026 | |
| 22 | D. E. Shaw & Co., Inc. | $3.7M | 425K | ▲+11% Added · +44K sh | Q1 2026 | |
| 23 | Hennion & Walsh Asset Management, Inc. | $5.7M | 422K | ▲+19% Added · +67K sh | Q2 2026 | |
| 24 | VANGUARD PORTFOLIO MANAGEMENT LLC | $3.4M | 397K | →First observed position No prior filed position | Q1 2026 | |
| 25 | PANAGORA ASSET MANAGEMENT INC | $4.7M | 350K | ▲New +350K 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, 14 funds opened a new position in MGTX and 22 added to an existing one, while 10 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 |
|---|---|---|
| ELI LILLY & COLLY | 66 funds | $38.2B |
| AMAZON.COM INCAMZN | 65 funds | $93.2B |
| NVIDIA CORPNVDA | 64 funds | $199.8B |
| MICRON TECHNOLOGY INCMU | 64 funds | $18.4B |
| GILEAD SCIENCES INCGILD | 63 funds | $9.8B |
| MICROSOFT CORPMSFT | 62 funds | $136.8B |
| BROADCOM INCAVGO | 62 funds | $78.8B |
| ALPHABET INC-CL AGOOGL | 62 funds | $71.9B |
| META PLATFORMS INC-CLASS AMETA | 62 funds | $56.9B |
| INTUITIVE SURGICAL INCISRG | 62 funds | $14.9B |
| PALANTIR TECHNOLOGIES INC-APLTR | 62 funds | $11.0B |
| BOSTON SCIENTIFIC CORPBSX | 62 funds | $6.2B |
Ranked by how many of MGTX's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Aug 18, 2026 | Forbes Alexandria | PRESIDENT & CEO, Director | Sell (S) | 62K | $859K |
| Jul 21, 2026 | Giroux Richard | CFO & COO | Sell (S) | 56K | $701K |
| Jul 7, 2026 | Naylor Stuart | CHIEF SCI OFCR, OPHTHALMOLOGY | Sell (S) | 3K | $35K |
| Jul 7, 2026 | Naylor Stuart | CHIEF SCI OFCR, OPHTHALMOLOGY | Sell (S) | 25K | $374K |
| May 19, 2026 | Forbes Alexandria | PRESIDENT & CEO, Director | Sell (S) | 62K | $569K |
| Apr 21, 2026 | Giroux Richard | CFO & COO | Sell (S) | 56K | $572K |
| Apr 7, 2026 | Naylor Stuart | CHIEF DEV. OFFICER | Sell (S) | 28K | $259K |
| Mar 24, 2026 | Forbes Alexandria | PRESIDENT & CEO, Director | Sell (S) | 62K | $459K |
| Oct 21, 2025 | Giroux Richard | CFO & COO | Sell (S) | 24K | $213K |
| Oct 7, 2025 | Forbes Alexandria | PRESIDENT & CEO, Director | Sell (S) | 48K | $399K |
| Jul 22, 2025 | Giroux Richard | CFO & COO | Sell (S) | 24K | $204K |
| Jul 8, 2025 | Forbes Alexandria | PRESIDENT & CEO, Director | Sell (S) | 48K | $379K |
Connected entities for MGTX
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/MGTX/capital-change-brief"
Use Arkolith's capital_change_brief for MGTX. 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 MGTX. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.