The large trim by Assenagon (56.7% reduction) outweighs the smaller accumulations in dollar terms. Monitor upcoming 13F filings for Q4 to see if the selling trend continues or if the Q3 cluster was a one-off rebalance.
Executive Summary
Three asset managers increased their ONTO positions in Q3 2026, led by Artemis Investment Management adding $5.6M (+32.7%), while Assenagon Asset Management trimmed $35.2M (-56.7%). The net institutional flow was negative at -$28.7M, driven by the large trim from Assenagon, but the buyer count (3) exceeds seller count (1), suggesting mixed conviction.
Key Financial Metrics
Institutional Positions
Net institutional flow: -$28.7M
▲ Buyers (3)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| Artemis Investment Management | ADD | +32.7% | $75.8M | $5.6M |
| Mather Group | DOUBLED | +115.8% | $80.0K | $34.0K |
| Vontobel Holding | DOUBLED | +152.9% | $1.8M | $920.0K |
▼ Sellers (1)
| Institution | Action | Change | Prev Value | Value Δ |
|---|---|---|---|---|
| Assenagon Asset Management | TRIM | -56.7% | $54.4M | -$35.2M |
Key Facts
- 3 buyers added $6.5M in aggregate (Artemis +$5.6M, Vontobel +$920K, Mather +$34K)
- 1 seller (Assenagon) trimmed $35.2M, reducing holdings by 56.7%
- Net net institutional flow was -$28.7M (buyers minus seller)
- All four funds are asset managers; no activist or activist-adjacent funds involved
Financial Impact
Three asset managers accumulated $6.5M in new positions while one asset manager reduced holdings by $35.2M, resulting in a net institutional outflow of approximately -$28.7M
Risk Factors
- 13F data is 45+ days stale; positions may have already been unwound or reversed
- Assenagon's large trim could signal a negative thesis or risk management action not visible in the filing
- Small sample (4 funds) limits statistical significance of the cluster 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-ONTO-2026-Q3 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 16, 2026 9d ago | Institutional Cluster | $226.28 | awaiting T+60 | — | — |
Aug 10, 2026 11w ago | 8-K | $291.35 | awaiting T+60 | — | — |
Jun 13, 2026 19w ago | Institutional Cluster | $335.96 $278.40 | ▼ −17.13% | ▼ −18.14% | — |
Jun 11, 2026 19w ago | Institutional Cluster | $303.53 $268.01 | ▼ −11.70% | ▼ −16.10% | — |
May 18, 2026 23w ago | 8-K | $254.53 $337.35 | ▲ +32.54% | ▲ +27.69% | — |
Apr 16, 2026 27w ago | 8-K | $267.15 $304.21 | ▲ +13.87% | ▲ +6.83% | — |
US Market Status
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