As of November 6, 2026, 3 holders' latest Schedule 13D or 13G filings report owning 5% or more of Silicom Ltd. The largest reported stake is Systematic Financial Management LP's, at 9.7%. 6 filings are on record since January 9, 2026 (Schedule 13G, February 10, 2026).
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Key facts
- · Reporting person: Portolan Capital Management, LLC · Sole voting: 288,787 · Shared voting: 0 · Sole dispositive: 288,787 · Shared dispositive: 0 · SCHEDULE 13G, 2026-09-30
- · Reporting person: First Wilshire Securities Management, Inc. · Sole voting: 272,111 · Shared voting: 0 · Sole dispositive: 284,287 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-08-13
- · Holder: Eizenman Avinoam · Percent: 5.7% · SCHEDULE 13D
- · Holder: First Wilshire Securities Management, Inc. · Percent: 5.4% · SCHEDULE 13G/A
- · Holder: Systematic Financial Management LP · Percent: 9.7% · SCHEDULE 13G
Silicom Ltd. has 6 Schedule 13D or 13G filings on record since 2026-01-09. 3 holders' latest filing reports 5% or more of ordinary shares. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Systematic Financial Management LP | 9.7% | 553,619 | SCHEDULE 13G, 2026-02-10 | 2025-12-31 |
| 5.7% | 327,559 | SCHEDULE 13D, 2026-04-20 | 2026-04-15 | |
| Portolan Capital Management, LLC | 5.06% | 288,787 | SCHEDULE 13G, 2026-09-30 | 2026-09-23 |
| Forsakringsaktiebolaget Avanza Pension | 4.98% | 282,501 | SCHEDULE 13G/A, 2026-01-09 | 2025-11-12 |
| First Wilshire Securities Management, Inc. | 4.98% | 284,287 | SCHEDULE 13G/A, 2026-08-13 | 2026-06-30 |
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More on Silicom Ltd. and the records around it.
Silicom Ltd. elsewhere on the record
Companies that share a holder
- Forsakringsaktiebolaget Avanza Pension also filed stake reports on 2 other companies: SMX (Security Matters) PLC (Nov 2026), Hyperion DeFi (Oct 2026)
- First Wilshire Securities Management, Inc. also filed stake reports on 3 other companies: GULF ISLAND FABRICATION INC (Feb 2026)
- SYSTEMATIC FINANCIAL MANAGEMENT LP also filed stake reports on 8 other companies: KVH INDUSTRIES INC \DE\ (Aug 2026), LSI INDUSTRIES INC (Aug 2026), MAGNACHIP SEMICONDUCTOR Corp (Feb 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Portolan Capital Management, LLC | 288,787 | 0 | 288,787 | 0 | SCHEDULE 13G, 2026-09-30 |
| George McCabe | 288,787 | 0 | 288,787 | 0 | SCHEDULE 13G, 2026-09-30 |
| First Wilshire Securities Management, Inc. | 272,111 | 0 | 284,287 | 0 | SCHEDULE 13G/A, 2026-08-13 |
The latest filing identifies Silicom Ltd. by CUSIP M84116108 and gives its principal executive office as 14 Atir Yeda Street, Kfar-Sava (SCHEDULE 13G, 2026-09-30).
Purpose of Transaction (Item 4)
Eizenman Avinoam
The Reporting Person's beneficial ownership increased above 5% because certain RSUs and options that he holds will vest over the next 60-days. The Reporting Person holds the securities described in Item 5 of this Schedule 13D for investment purposes and in connection with their ongoing role as an officer of the Issuer. The Reporting Person does not currently have any plans or proposals which relate to or would result in any of the actions specified in clauses (a) through (j) of Item 4 of Schedule 13D. However, as part of their ongoing evaluation of this investment and investment alternatives, the Reporting Person reserves the right, from time to time, to acquire additional securities of the Issuer, to dispose of some or all of the securities held by them, or to formulate other purposes, plans or proposals regarding the Issuer or its securities, subject to market conditions, the Issuer's insider trading policies, and applicable legal requirementsItem 4 of the SCHEDULE 13D filed 2026-04-20
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2026-01-09 | Forsakringsaktiebolaget Avanza Pension | 4.98% | SCHEDULE 13G/A |
| 2026-02-10 | Systematic Financial Management LP | 9.7% | SCHEDULE 13G |
| 2026-02-11 | First Wilshire Securities Management, Inc. | 5.4% | SCHEDULE 13G/A |
| 2026-04-20 | Eizenman Avinoam | 5.7% | SCHEDULE 13D |
| 2026-08-13 | First Wilshire Securities Management, Inc. | 4.98% | SCHEDULE 13G/A |
| 2026-09-30 | Portolan Capital Management, LLC | 5.06% | SCHEDULE 13G |
Questions about who owns Silicom Ltd.
Who owns Silicom Ltd.?
On this page, 3 holders' latest ownership filings report 5% or more of Silicom Ltd.: Systematic Financial Management LP (9.7%, Schedule 13G, filed 2026-02-10), Eizenman Avinoam (5.7%, Schedule 13D, filed 2026-04-20) and Portolan Capital Management, LLC (5.06%, Schedule 13G, filed 2026-09-30).
Who are the largest shareholders of Silicom Ltd.?
By the share each holder's latest filing reports, the largest holders of Silicom Ltd. on this page are Systematic Financial Management LP (9.7%), Eizenman Avinoam (5.7%) and Portolan Capital Management, LLC (5.06%).
When did Systematic Financial Management LP buy into Silicom Ltd.?
The filings give report dates, not purchase dates. The earliest filing from Systematic Financial Management LP on this page is the Schedule 13G, filed 2026-02-10, reporting 9.7%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 6 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.