The cluster reveals a tug-of-war: broad-based active manager accumulation vs concentrated profit-taking by large holders. Monitor for a catalyst (e.g., earnings or AI packaging demand update) that could resolve the divergence. The lack of insider buying reduces conviction in the bullish side.
Executive Summary
Institutional cluster for AMKR shows 55 buyers adding $95.9M vs 24 sellers reducing $129.6M, resulting in net selling of $33.7M. Broad-based accumulation from asset managers (Invesco +$41M, Allianz +$22.6M) is offset by concentrated exits from Norges Bank (-$53.7M) and Arrowstreet (-$31.1M). The divergent insider activity (score 25/100, no open-market buys) weakens conviction in the bullish thesis.
Key Financial Metrics
Institutional Positions
Net institutional flow: -$33.7M
▲ Buyers (55)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| Invesco | ADD | +69.4% | $85.1M | $41.0M |
| Allianz Asset Management | ADD | +37.4% | $62.3M | $22.6M |
| Russell Investments Group | DOUBLED | +204.4% | $18.0M | $12.8M |
| Amundi | DOUBLED | +3546.6% | $11.9M | $11.6M |
| Sei Investments | ADD | +33.8% | $18.1M | $6.2M |
▼ Sellers (24)
| Institution | Action | Change | Prev Value | Value Δ |
|---|---|---|---|---|
| Norges Bank | EXIT | -100% | $53.7M | -$53.7M |
| Arrowstreet Capital, Limited Partnership | NEAR_EXIT | -99.3% | $31.4M | -$31.1M |
| First Trust Advisors | TRIM | -34.1% | $107.5M | -$26.7M |
| Hsbc Holdings | TRIM | -65.6% | $8.6M | -$5.3M |
| Mirae Asset Global Etfs Holdings | NEAR_EXIT | -94.2% | $5.1M | -$4.7M |
Key Facts
- 55 institutional buyers added $95.9M in aggregate; 24 sellers reduced $129.6M
- Largest buyer: Invesco added $41.0M (+69.4% shares)
- Largest seller: Norges Bank exited $53.7M (-100%)
- Arrowstreet Capital near-exited $31.1M (-99.3% shares)
- Insider activity divergent: 0 open-market insider buyers, 2 sells totaling $396K in last 30 days
- Net dollar change across all positions: -$33.7M
Financial Impact
Net institutional selling of $33.7M (0.2% of $16.5B market cap), with buying concentrated in active asset managers and selling in sovereign/quant funds
Risk Factors
- 13F reporting lag (45 days) means positions may already be unwound
- Concentrated selling by Norges and Arrowstreet could indicate fundamental concerns
- Insider selling (2 trades, $396K) without any open-market buys weakens the accumulation signal
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-AMKR-2026-Q1 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Aug 19, 2026 6w ago | Insider Cluster | $50.89 $47.95 | ▼ −5.78% | ▼ −3.83% | — |
Aug 13, 2026 7w ago | Insider Cluster | $57.75 $51.73 | ▼ −10.42% | ▼ −8.68% | — |
Aug 11, 2026 7w ago | Insider Cluster | $54.30 $51.35 | ▼ −5.43% | ▼ −4.37% | — |
Aug 7, 2026 8w ago | Insider Cluster | $55.27 $47.77 | ▼ −13.57% | ▼ −13.17% | — |
Aug 3, 2026 8w ago | Institutional Cluster | $50.84 $47.30 | ▼ −6.96% | ▼ −8.20% | — |
Jul 27, 2026 9w ago | 8-K | $45.69 $48.70 | ▲ +6.59% | ▲ +3.21% | — |
Jul 23, 2026 10w ago | Institutional Cluster | $65.33 $50.86 | ▼ −22.15% | ▼ −25.46% | — |
Jul 20, 2026 10w ago | Insider Cluster | $62.56 $61.30 | ▼ −2.01% | ▼ −6.13% | — |
Jul 20, 2026 10w ago | Insider Cluster | $62.56 $61.30 | ▼ −2.01% | ▼ −6.13% | — |
May 21, 2026 19w ago | 8-K | $65.90 $93.63 | ▲ +42.07% | ▲ +41.74% | — |
US Market Status
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