MGNX · Insider trading · 13F holders · Congress trades
Macrogenics Inc (MGNX)
Who is buying and selling MGNX: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 3
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $129K
- Congress trades, 12 months
- 0
MGNX at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 1 MGNX insider filed 1 sale worth $129K on SEC Form 4, and no open-market purchases; 1 of the sales were pre-planned under Rule 10b5-1.
- 3 13F filers hold MGNX among their 50 largest positions, worth $25.1M combined. The biggest bets by portfolio weight are Diadema Partners LP (0.7%), Armistice Capital, LLC (0.6%) and Velan Capital Investment Management LP (0.2%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
- No member of Congress has disclosed a trade in MGNX.
- MGNX last closed at $2.38 on Oct 29, 2026.
MGNX insider trading
Between Aug 1, 2026 and Oct 29, 2026, 1 MGNX insider filed 1 sale worth $129K on SEC Form 4, and no open-market purchases; 1 of the sales were pre-planned under Rule 10b5-1.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Aug 20, 2026 | Peters Jeffrey Stuart | Senior VP, GC, and Secretary | Sale10b5-1 | 31,105 | $4.15 | $129K | SEC |
Who owns MGNX? Hedge funds and superinvestors
3 13F filers hold MGNX among their 50 largest positions, worth $25.1M combined. The biggest bets by portfolio weight are Diadema Partners LP (0.7%), Armistice Capital, LLC (0.6%) and Velan Capital Investment Management LP (0.2%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Armistice Capital, LLCHedge fund | 0.6% | $23.1M | 5,006,752 | — | Q2 2026 |
| Diadema Partners LPHedge fund | 0.7% | $1.7M | 374,403 | -37.6% shares | Q2 2026 |
| Velan Capital Investment Management LPHedge fund | 0.2% | $277K | 60,000 | +100.0% shares | Q2 2026 |
Each manager counts with its latest 13F (Q2 2026: 3). Screen MGNX in the grand portfolio →
MGNX stock trades by members of Congress
No member of Congress has disclosed a trade in MGNX.
MGNX questions and answers
Are insiders buying MGNX stock?
Between Aug 1, 2026 and Oct 29, 2026, 1 MGNX insider filed 1 sale worth $129K on SEC Form 4, and no open-market purchases; 1 of the sales were pre-planned under Rule 10b5-1.
Which hedge funds own MGNX?
3 13F filers hold MGNX among their 50 largest positions, worth $25.1M combined. The biggest bets by portfolio weight are Diadema Partners LP (0.7%), Armistice Capital, LLC (0.6%) and Velan Capital Investment Management LP (0.2%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
Has Congress traded MGNX?
No member of Congress has disclosed a trade in MGNX.
Who is the largest holder of MGNX?
Among 13F filers, Armistice Capital, LLC reports the largest MGNX position, $23.1M (5,006,752 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Diadema Partners LP's: 0.7% of its portfolio.
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