Monitor for any subsequent conversion to SC 13D (activist) or further accumulation above 10%. The presence of multiple passive filers (Strider Capital, Needham, TL Stiftung) suggests a fragmented institutional base — any one filer crossing 10% could trigger board attention.
Price Chart
Executive Summary
Portolan Capital Management, LLC disclosed a 5.15% passive stake in Lantronix Inc. as of October 6, 2026, holding 2,405,785 shares. This is a new 13G filing by a registered investment adviser, indicating no intent to influence management. The filing adds to a series of passive stake disclosures by other investors (Strider Capital, Needham entities, TL Stiftung) over the past year, signaling continued institutional interest but no activist pressure.
Key Financial Metrics
Key Facts
- Portolan Capital Management disclosed beneficial ownership of 2,405,785 shares of Lantronix common stock.
- The stake represents 5.15% of shares outstanding as of October 6, 2026.
- Portolan is a registered investment adviser filing under Rule 13d-1(c) — passive, no control intent.
- George McCabe, Manager of Portolan, is also listed as a reporting person with shared voting and dispositive power.
- This is a new filing (not an amendment) — no prior 13G from Portolan for LTRX on record.
Financial Impact
5.15% passive stake — no direct financial impact; signals institutional conviction at current valuation.
Risk Factors
- Passive 13G — no guarantee of future activism; Portolan has no history of converting 13G to 13D for this issuer.
- No stated price or date of acquisition — stake cost basis and entry valuation unknown.
Investment Themes
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| SC 13G Filing (Primary) | 0001104659-26-115534 |
| Document: 0001104659-26-115534-index.html | 0001104659-26-115534 |
| Document: 0001104659-26-115534.txt | 0001104659-26-115534 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 22, 2026 4d ago | Press Release | $5.61 | awaiting T+20 | — | $5.83 (+3.92%) |
Oct 13, 2026 13d ago | SC 13G | $5.91 | awaiting T+20 | — | $5.83 (−1.27%) |
Sep 28, 2026 28d ago | SC 13G | $7.22 | awaiting T+20 | — | $5.83 (−19.25%) |
Sep 22, 2026 4w ago | Institutional Cluster | $6.25 $5.82 | ▼ −6.88% | ▼ −6.32% | $5.83 (−6.72%) |
Sep 9, 2026 6w ago | Insider Buy | $5.06 $6.83 | ▲ +34.98% | ▲ +32.60% | $5.83 (+15.22%) |
Aug 26, 2026 8w ago | Press Release | $6.03 $6.60 | ▲ +9.45% | ▲ +9.96% | $5.83 (−3.32%) |
Jun 11, 2026 19w ago | Institutional Cluster | $6.88 $5.70 | ▼ −17.15% | ▼ −19.04% | $5.83 (−15.26%) |
Jun 1, 2026 21w ago | 8-K | $7.94 $5.92 | ▲ +25.44% | ▲ +23.88% | $5.83 (+26.57%) |
May 8, 2026 24w ago | 8-K / 424B5 | $6.25 $6.37 | ▲ +1.92% | ▲ +2.22% | $5.83 (−6.72%) |
Apr 22, 2026 26w ago | Press Release | $6.47 $6.36 | ▼ −1.70% | ▼ −4.87% | $5.83 (−9.89%) |
US Market Status
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