MGNX MACROGENICS INC
Executive Summary
A mixed institutional cluster formed in MGNX during Q3 2024: 5 smaller managers modestly added ($411K net buying), while 9 larger, more established firms aggressively reduced ($5.6M net selling). The 2:1 seller-to-dollar ratio (selling dominates by 14x) signals significant institutional loss of conviction, outweighing the small-scale accumulation.
Key Financial Metrics
Institutional Positions
Net institutional flow: -$5.2M
▲ Buyers (5)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| Connor, Clark & Lunn Investmen | ADD | +39.3% | $2.2M | $159.0K |
| Voya Investment Management | DOUBLED | +176.7% | $194.0K | $103.0K |
| Exchange Traded Concepts | DOUBLED | +260.8% | $161.0K | $103.0K |
| Brevan Howard Capital Manageme | ADD | +93.8% | $137.0K | $46.0K |
| Cwm | DOUBLED | +5571.5% | $33.00 | $32.00 |
▼ Sellers (9)
| Institution | Action | Change | Prev Value | Value Δ |
|---|---|---|---|---|
| Panagora Asset Management | TRIM | -52.1% | $3.2M | -$2.0M |
| Marshall Wace | TRIM | -42% | $2.8M | -$1.5M |
| Woodline Partners | TRIM | -48.9% | $1.6M | -$949.7K |
| Walleye Capital | TRIM | -43.7% | $867.0K | -$489.3K |
| State Of Wisconsin Investment | TRIM | -65.8% | $407.0K | -$298.9K |
Actionable Insight
The size and consistency of the selling cluster — especially the aggressive trims by three multi-strategy/quant funds with large prior positions — suggests a shared de-risking or thesis break. Monitor for further insider selling or catalyst-driven volatility. If the stock still shows weakness on high volume in weeks ahead, the sellers were likely correct and short-term longs should reduce exposure.
Key Facts
- 9 sellers vs 5 buyers, with net selling of $5.6M
- Largest sellers: Panagora ($1.98M trim, 52.1%), Marshall Wace ($1.54M trim, 42%), Woodline Partners ($950K trim, 48.9%)
- Connor, Clark & Lunn was the largest buyer ($159K add, +39.3%)
- Buyers were small/emerging managers; sellers include established multi-strategy and long-only firms
- Cluster is dominated by active managers, amplifying the signal vs passive rebalancing
Financial Impact
5 smaller buyers added ~$411K in new holdings, while 9 sellers (led by Panagora, Marshall Wace, and Woodline) reduced by $5.6M — a net outflow of ~$5.2M, representing roughly 13% of MGNX's average daily volume and a meaningful institutional de-positioning
Risk Factors
- Accumulation by tiny buyers may be idiosyncratic or passive rebalance noise
- 45-day 13F reporting lag means cluster may have been fully unwound by now
- High T+20 win rate (40%) on prior MGNX calls suggests caution — prior bullish calls at similar conviction levels did not always confirm positively
Market Snapshot
Documents Analyzed
This report is based on 1 institutional 13F filing from SEC EDGAR.
| Document | Accession Number |
|---|---|
| INST-CLUSTER Data (Synthetic) | inst-cluster-MGNX-2024-Q3 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
|
Jun 12, 2026
1d ago
|
Institutional Cluster
| $4.01 awaiting T+5 | awaiting T+5 | — | — |
|
Jun 11, 2026
2d ago
|
Institutional Cluster
| $3.87 awaiting T+5 | awaiting T+5 | — | — |
|
May 13, 2026
4w ago
|
8-K
| $4.16 $4.24 | ▲ +1.92% | ▲ +2.64% | — |
|
May 12, 2026
4w ago
|
8-K
| $3.52 $4.35 | ▲ +23.58% | ▲ +23.50% | — |
|
May 11, 2026
4w ago
|
Press Release
| $3.52 $4.35 | ▲ +23.58% | ▲ +23.50% | — |
|
Apr 8, 2026
9w ago
|
8-K
| $3.44 $3.41 | ▼ −0.87% | ▼ −4.06% | — |
|
Apr 8, 2026
9w ago
|
Press Release
| $3.44 $3.41 | ▼ −0.87% | ▼ −4.06% | — |
|
Apr 8, 2026
9w ago
|
DEFA14A
| $3.44 $3.41 | ▼ −0.87% | ▼ −4.06% | — |
|
Feb 28, 2026
15w ago
|
Institutional Cluster
| $1.94 $2.36 | ▲ +21.65% | ▲ +22.86% | — |
US Market Status
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