Portolan's new 5.06% passive stake is a modest vote of confidence but not a catalyst. Monitor for any future conversion to SC 13D or additional accumulation, which would signal a shift toward activism. For now, no immediate trading action is warranted.
Price Chart
Executive Summary
Hedge fund Portolan Capital Management, LLC filed a new Schedule 13G disclosing a 5.06% passive stake in SILICOM LTD. as of September 23, 2026. This is a new position, not an amendment, and the fund certifies no intent to influence control. The stake is modestly above the 5% threshold, indicating a passive investment view.
Key Financial Metrics
Key Facts
- Portolan Capital Management, LLC filed a new Schedule 13G (not an amendment) for SILICOM LTD.
- Beneficial ownership: 288,787 ordinary shares, representing 5.06% of shares outstanding.
- Filing date: September 30, 2026; event date: September 23, 2026.
- Portolan is a registered investment adviser; George McCabe is the Manager and also reports 5.06% ownership.
- The filer certifies the securities were not acquired with the purpose of changing or influencing control.
Financial Impact
5.06% passive stake valued at approximately $9.6 million based on 288,787 shares (no per-share price in filing; estimated using recent trading range).
Risk Factors
- Portolan could later convert to an activist 13D filing, introducing uncertainty.
- A 5.06% stake is just above the threshold; the fund may reduce or exit without further disclosure.
- No financial or operational data in this filing to assess company fundamentals.
Investment Themes
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| SC 13G Filing (Primary) | 0001104659-26-112395 |
| Document: 0001104659-26-112395-index.html | 0001104659-26-112395 |
| Document: 0001104659-26-112395.txt | 0001104659-26-112395 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 1, 2026 26d ago | Press Release | $53.63 | awaiting T+60 | — | $41.99 (−21.71%) |
Oct 1, 2026 26d ago | 6-K | $53.63 | awaiting T+60 | — | $41.99 (−21.71%) |
Sep 30, 2026 26d ago | SC 13G | $53.63 | awaiting T+60 | — | $41.99 (−21.71%) |
Sep 28, 2026 29d ago | 6-K | $51.09 | awaiting T+60 | — | $41.99 (−17.82%) |
Sep 2, 2026 7w ago | 6-K | $39.51 | awaiting T+60 | — | $41.99 (+6.28%) |
Aug 28, 2026 8w ago | Insider Cluster | $42.20 | awaiting T+60 | — | $41.99 (+0.51%) |
Aug 18, 2026 10w ago | Insider Cluster | $45.91 | awaiting T+60 | — | $41.99 (+8.55%) |
Aug 13, 2026 10w ago | Insider Cluster | $44.89 | awaiting T+60 | — | $41.99 (+6.47%) |
Jul 29, 2026 12w ago | Press Release | $34.92 $37.62 | ▲ +7.73% | ▲ +3.00% | $41.99 (+20.23%) |
Jul 29, 2026 12w ago | 6-K | $34.92 $37.62 | ▲ +7.73% | ▲ +3.00% | $41.99 (+20.23%) |
US Market Status
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