The divergence between passive accumulation and active/quant selling is stark. Monitor next earnings for fundamental catalysts that could justify the quant exodus or prove them wrong. The Pictet doubling is an outlier — watch for follow-on 13F filings to see if other active managers join.
Executive Summary
Q2 2026 13F filings reveal a mixed institutional cluster in Dianthus Therapeutics (DNTH): 48 buyers added $170.9M in positions (dominated by mega-passive funds like Geode, UBS, and Vanguard), while 24 sellers reduced by $126.7M, including full exits by quant funds Point72 and Millennium. The net $44.2M inflow is driven by passive/index rebalancing, not active conviction, while the aggressive selling by sophisticated quant shops signals caution on the stock's outlook.
Key Financial Metrics
Institutional Positions
Net institutional flow: $44.2M
▲ Buyers (48)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| Geode | ADD | +37.4% | $122.7M | $45.8M |
| UBS | ADD | +45.9% | $111.2M | $45.6M |
| Vanguard Portfolio Management | ADD | +63.2% | $55.6M | $26.3M |
| Pictet Asset Management | DOUBLED | +4922.2% | $24.1M | $23.7M |
▼ Sellers (24)
| Institution | Action | Change | Prev Value | Value Δ |
|---|---|---|---|---|
| Point72 | EXIT | -100% | $54.0M | -$54.0M |
| Millennium | TRIM | -64.9% | $22.0M | -$13.0M |
| D.E. Shaw | TRIM | -71.3% | $12.6M | -$8.4M |
| Bnp Paribas | NEAR_EXIT | -96.5% | $19.8M | -$19.0M |
Key Facts
- 48 institutional buyers added $170.9M in new positions during Q2 2026
- 24 institutional sellers reduced holdings by $126.7M, net inflow of $44.2M
- Top buyers: Geode (+$45.8M), UBS (+$45.6M), Vanguard (+$26.3M) — all mega-passive/index funds
- Point72 fully exited a $54.0M position; Millennium trimmed -64.9% ($13.0M); D.E. Shaw trimmed -71.3% ($8.4M)
- Pictet Asset Management nearly doubled its position from $413K to $24.1M (+4922%) — the only active manager with conviction buying
- Passive/index funds account for ~85% of buying value; active managers are net sellers
Financial Impact
48 buyers accumulated $390.5M in holdings (net change +$170.9M) while 24 sellers reduced by $126.7M, for a net institutional inflow of $44.2M in Q2 2026
Risk Factors
- 13F data is 45+ days stale; positions may have already been unwound
- Quant funds (Point72, Millennium, D.E. Shaw) exiting suggests thesis concerns not visible in passive buying
- Passive buying may reflect index rebalancing, not stock-specific conviction — not a directional signal
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-2026-Q2 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 12, 2026 14d ago | Institutional Cluster | $81.57 $77.58 | ▼ −4.89% | ▼ −4.88% | — |
Aug 11, 2026 10w ago | Insider Cluster | $112.41 $109.60 | ▼ −2.50% | ▼ −3.20% | — |
Aug 11, 2026 10w ago | Insider Cluster | $112.41 $109.60 | ▼ −2.50% | ▼ −3.20% | — |
Aug 11, 2026 10w ago | Insider Cluster | $112.41 $109.60 | ▼ −2.50% | ▼ −3.20% | — |
Aug 11, 2026 10w ago | Insider Cluster | $112.41 $109.60 | ▲ +2.50% | ▲ +3.20% | — |
Aug 10, 2026 11w ago | 144 | $108.49 $112.41 | ▲ +3.61% | ▲ +3.36% | — |
Jun 29, 2026 17w ago | Press Release | $95.68 $97.48 | ▲ +1.88% | ▲ +1.10% | — |
Jun 12, 2026 19w ago | 8-K | $82.07 $82.51 | ▲ +0.54% | ▼ −1.23% | — |
Jun 11, 2026 19w ago | Institutional Cluster | $76.45 $82.07 | ▲ +7.35% | ▲ +6.81% | — |
May 5, 2026 24w ago | 8-K | $90.42 $85.47 | ▼ −5.47% | ▼ −5.14% | — |
US Market Status
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