CMPX Compass Therapeutics, Inc.
Executive Summary
A mixed institutional cluster in CMPX for Q3 2024 shows 6 buyers accumulating $11.0M net (led by Blackstone adding $10.8M) against 3 sellers reducing by $2.5M (led by Janus Henderson trimming $2.4M). The net buying of $8.5M is dominated by active asset managers, but the presence of a large trim from Janus Henderson and a near-exit by Citadel introduces caution. Historical reports on CMPX have shown strong positive drift (avg T+20 +16.65%, 86% win rate), suggesting the stock has been in an uptrend, but this cluster's mixed signal tempers conviction.
Key Financial Metrics
Institutional Positions
Net institutional flow: $8.5M
▲ Buyers (6)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| Blackstone | ADD | +30.3% | $18.4M | $10.8M |
| Panagora Asset Management | DOUBLED | +107.4% | $261.0K | $192.0K |
| Voya Investment Management | ADD | +31.3% | $69.0K | $41.0K |
▼ Sellers (3)
| Institution | Action | Change | Prev Value | Value Δ |
|---|---|---|---|---|
| Janus Henderson Group | TRIM | -64.7% | $5.8M | -$2.4M |
| Citadel | NEAR_EXIT | -76% | $268.0K | -$149.6K |
Actionable Insight
The cluster is directionally mixed: Blackstone's large accumulation signals conviction, but Janus Henderson's substantial trim and Citadel's near-exit suggest diverging views. Given CMPX's strong historical drift, monitor for a catalyst (e.g., pipeline update or earnings) that could resolve the divergence. The net buying is modest relative to the stock's likely float, so the signal is not overwhelming.
Key Facts
- 6 institutional buyers added $11.0M in new holdings; 3 sellers reduced by $2.5M.
- Blackstone was the largest buyer, adding $10.8M (2.33M shares, +30.3%).
- Janus Henderson was the largest seller, trimming $2.4M (3.37M shares, -64.7%).
- Citadel nearly exited, reducing 76% of its position (value from $268K to $118K).
- Net institutional inflow of approximately $8.5M, concentrated in active asset managers.
- Historical CMPX reports show strong positive drift (avg T+20 +16.65%, 86% win rate).
Financial Impact
Net institutional inflow of approximately $8.5M, with $11.0M in buying vs $2.5M in selling.
Risk Factors
- Janus Henderson's $2.4M trim and Citadel's near-exit indicate institutional skepticism.
- 13F data is 45+ days stale; positions may have changed since quarter-end.
- Mixed cluster reduces signal clarity vs a unanimous directional cluster.
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-CMPX-2024-Q3 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
|
Jun 11, 2026
1d ago
|
Institutional Cluster
| $2.00 awaiting T+5 | awaiting T+5 | — | — |
|
May 21, 2026
22d ago
|
Press Release
| $2.07 $2.22 | ▲ +7.25% | ▲ +5.57% | — |
|
May 5, 2026
5w ago
|
8-K
| $1.95 $1.83 | ▼ −6.15% | ▼ −8.14% | — |
|
Apr 29, 2026
6w ago
|
DEFA14A
| $1.67 $1.95 | ▲ +16.77% | ▲ +13.66% | — |
|
Apr 27, 2026
6w ago
|
8-K
| $1.79 $1.94 | ▲ +8.38% | ▲ +7.98% | — |
|
Apr 27, 2026
6w ago
|
Press Release
| $1.79 $1.94 | ▲ +8.38% | ▲ +7.98% | — |
|
Apr 24, 2026
7w ago
|
Press Release
| $1.79 $1.94 | ▲ +8.38% | ▲ +7.98% | — |
|
Mar 5, 2026
14w ago
|
8-K / PRESS-RELEASE
| $5.53 $5.19 | ▼ −6.15% | ▼ −3.91% | — |
US Market Status
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