MacroGenics Inc
Ownership
Ownership Structure
Who owns MacroGenics Inc (MGNX)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 88.6% of the shares are freely tradable; institutional investors hold 70.3%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Armistice Capital, LLC | 9.46 | 6,012,000 | -4.9 | 03/31/2026 |
| Renaissance Technologies Corp | 4.66 | 2,963,559 | +1.9 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.18 | 2,653,853 | +0.0 | 03/31/2026 |
| Acadian Asset Management LLC | 4.00 | 2,544,000 | +199,116.9 | 03/31/2026 |
| Two Sigma Investments LLC | 3.88 | 2,465,699 | -2.5 | 06/30/2026 |
| Bank of America Corp | 3.78 | 2,401,814 | +30.7 | 03/31/2026 |
| Millennium Management LLC | 3.74 | 2,374,296 | -15.0 | 06/30/2026 |
| Marshall Wace Asset Management Ltd | 3.19 | 2,025,526 | +57.7 | 03/31/2026 |
| Wasatch Advisors LP | 3.18 | 2,018,881 | +29.4 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 3.03 | 1,925,510 | +0.0 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Bonvini Ezio | Sr VP, Research & CSO | 185,799 | 761,776 $ | Aug 17, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 19, 2026 | Peters Jeffrey Stuart | Senior VP, GC, and Secretary | Sell | 31,105 | 4.15 | 129,086 |
| Aug 17, 2026 | Bonvini Ezio | Sr VP, Research & CSO | Other | 40,000 | 2.60 | 104,000 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 18, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.