The large trim by Parnassus Investments, a well-known active manager, is the most notable signal in this cluster. Monitor upcoming 13F filings for further trimming or full exits by other large holders. The buying side is too small in dollar terms to offset the selling conviction.
Executive Summary
Institutional activity in AMD during Q3 2026 shows a mixed picture: three smaller active managers added $69.4M in positions, while two larger asset managers trimmed a combined $557.6M. The net selling is dominated by Parnassus Investments, which cut nearly $468M, suggesting a significant conviction reduction by a major holder. The buying side is relatively small in dollar terms and includes a Canadian broker and a risk-management firm, which may reflect tactical rebalancing rather than a strong bullish thesis.
Key Financial Metrics
Institutional Positions
Net institutional flow: -$488.2M
▲ Buyers (3)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| Ninety One Uk | DOUBLED | +684.1% | $2.1M | $1.8M |
| Td Waterhouse Canada | ADD | +63.4% | $143.8M | $67.5M |
| Cardano Risk Management B.v. | ADD | +35.1% | $418.0K | $124.0K |
▼ Sellers (2)
| Institution | Action | Change | Prev Value | Value Δ |
|---|---|---|---|---|
| Vontobel Holding | TRIM | -32.5% | $309.5M | -$89.6M |
| Parnassus Investments | TRIM | -37.9% | $1.4B | -$468.0M |
Key Facts
- 3 buyers added $69.4M in aggregate; 2 sellers reduced by $557.6M
- Parnassus Investments trimmed 37.9% of its AMD position, selling $468M
- Vontobel Holding trimmed 32.5%, selling $89.6M
- Ninety One UK more than doubled its tiny position (+684% shares, +$1.8M)
- TD Waterhouse Canada added 63.4% (+$67.5M), the largest buyer by dollar value
- Cardano Risk Management added 35.1% (+$124K), a very small increase
Financial Impact
Net institutional selling of $488.2M in Q3 2026, with 2 sellers reducing by $557.6M and 3 buyers adding $69.4M
Risk Factors
- 13F data is 45+ days stale; positions may have been unwound or reversed since quarter-end
- Parnassus's large trim could indicate fundamental concerns not yet public
- Buyers are small and may not represent informed institutional conviction
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-AMD-2026-Q3 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 22, 2026 4d ago | Institutional Cluster | $516.79 | awaiting T+60 | — | — |
Oct 21, 2026 6d ago | PTAB Trial | $507.93 | awaiting T+60 | — | — |
Oct 20, 2026 7d ago | PTAB Trial | $552.72 | awaiting T+60 | — | — |
Oct 19, 2026 8d ago | PTAB Trial | $534.74 | awaiting T+60 | — | — |
Oct 19, 2026 8d ago | PTAB Trial | $534.74 | awaiting T+60 | — | — |
Sep 28, 2026 28d ago | Press Release | $607.57 | awaiting T+60 | — | — |
Sep 17, 2026 5w ago | Insider Cluster | $559.82 | awaiting T+60 | — | — |
Aug 27, 2026 8w ago | Insider Cluster | $465.58 | awaiting T+60 | — | — |
Aug 26, 2026 8w ago | Insider Cluster | $476.67 | awaiting T+60 | — | — |
Aug 21, 2026 9w ago | ANALYST-UPGRADE | $473.25 | awaiting T+60 | — | — |
US Market Status
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