The cluster signals high conviction from activist-capable quant funds that rarely execute large same-direction 13F clusters without a catalyst thesis. Watch for Q4 2025 13F filings (due Feb 14, 2026) to see if these positions were maintained — any unwinding by Citadel/Point72 would break the cluster signal. Also monitor for pipeline data readouts or partnership news that may have been the shared catalyst.
Executive Summary
Five institutional investors (including two hedge funds with strong alpha track records — Citadel and Point72) added $233.6M to positions in Dianthus Therapeutics during Q3 2025, while only one institution trimmed modestly. The cluster is dominated by active quant managers alongside passive rebalancers, indicating a shared conviction thesis on DNTH's pipeline (likely complement-directed therapy) and commercialization ramp.
Key Financial Metrics
Institutional Positions
Net institutional flow: $233.6M
▲ Buyers (5)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| Fidelity | ADD | +31.4% | $234.9M | $150.3M |
| Point72 | ADD | +46.6% | $80.4M | $54.4M |
| Citadel | ADD | +52.4% | $39.9M | $27.5M |
| Invesco | DOUBLED | +114.6% | $1.8M | $1.4M |
| T. Rowe Price | DOUBLED | +1921.5% | $9.0K | $8.0K |
▼ Sellers (1)
| Institution | Action | Change | Prev Value | Value Δ |
|---|---|---|---|---|
| Morgan Stanley | TRIM | -43.8% | $2.6M | $482.0K |
Key Facts
- 5 institutions accumulated $233.6M net; only 1 seller trimmed $0.5M
- Fidelity added 1.43M shares (+31%), bringing its position to 5.97M shares worth $234.9M
- Citadel added 348.5K shares (+52%), reaching 1.01M shares worth $39.9M
- Point72 added 649.4K shares (+47%), reaching 2.04M shares worth $80.4M
- Morgan Stanley trimmed 60.3K shares (-44%) but position value still rose to $3.1M
- T. Rowe Price and Invesco doubled their positions from small bases
- 95% of analysts rate DNTH Buy or Strong Buy; market cap ~$4.2B
Financial Impact
5 institutions accumulated $233.6M in DNTH during Q3 2025, with two quant hedge funds (Citadel, Point72) adding $81.9M combined. One passive seller trimmed less than $0.5M.
Risk Factors
- 13F data is 45 days stale; positions may have been unwound before the report date
- Two of the largest buyers (Fidelity, Morgan Stanley) are passive/index funds with mechanical rebalancing, not conviction-based
- Historical calibration for this filing type shows negative net alpha (-1.13% at T+20) after costs on score-5 filings, with below-50% directional accuracy
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 institutional 13F filing from SEC EDGAR.
| Document | Accession Number |
|---|---|
| INST-CLUSTER Data (Synthetic) | inst-cluster-DNTH-2025-Q3 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Aug 11, 2026 7w ago | Insider Cluster | $112.41 $103.28 | ▼ −8.12% | ▼ −6.22% | — |
Aug 11, 2026 7w ago | Insider Cluster | $112.41 $103.28 | ▼ −8.12% | ▼ −6.22% | — |
Aug 11, 2026 7w ago | Insider Cluster | $112.41 $103.28 | ▼ −8.12% | ▼ −6.22% | — |
Aug 11, 2026 7w ago | Insider Cluster | $112.41 $103.28 | ▲ +8.12% | ▲ +6.22% | — |
Aug 10, 2026 7w ago | 144 | $108.49 $107.04 | ▼ −1.34% | ▼ −0.28% | — |
Jun 29, 2026 13w ago | Press Release | $95.68 $103.87 | ▲ +8.56% | ▲ +8.84% | — |
Jun 12, 2026 16w ago | 8-K | $82.07 $97.60 | ▲ +18.92% | ▲ +17.14% | — |
Jun 11, 2026 16w ago | Institutional Cluster | $76.45 $100.03 | ▲ +30.84% | ▲ +28.95% | — |
May 5, 2026 21w ago | 8-K | $90.42 $84.97 | ▼ −6.03% | ▼ −8.81% | — |
Mar 12, 2026 29w ago | Press Release | $77.86 $90.00 | ▲ +15.59% | ▲ +12.00% | — |
US Market Status
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