Silicom VP ends Section 16 reporting status

Silicom Ltd. disclosed that VP Engineering David Castiel is no longer subject to Section 16 reporting requirements for the company’s securities.

Accepted by SEC EDGAR 07/29/2026 - 08:04 AM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Silicom Ltd. disclosed that VP Engineering David Castiel is no longer subject to Section 16 reporting requirements for the company’s securities. A Form 4 was submitted solely to document this status change, and it explicitly states that no transactions are being reported.

Key Terms

Section 16 of the Securities Exchange Act of 1934, Reporting Person, Form 4

3 terms

Section 16 of the Securities Exchange Act of 1934 regulatory

"no longer subject to Section 16 of the Securities Exchange Act of 1934"

A provision of federal securities law that requires company insiders—directors, officers and large shareholders—to publicly report their stock holdings and trades and to surrender any “short-swing” profits from purchases and sales within a six-month window. It acts like a rule that forces leaders to announce their trades and prevents quick buy-sell windfalls, giving investors transparency into insider activity and reducing opportunities for unfair gain.

Reporting Person regulatory

"to reflect that the Reporting Person is no longer subject"

Form 4 regulatory

"This Form is being filed solely to reflect"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the latest Form 4 for SILC report about David Castiel?

The Form 4 states that David Castiel, VP Engineering of Silicom Ltd. (SILC), is no longer subject to Section 16 reporting with respect to the issuer. It also clarifies that no insider transactions are being reported in this Form 4.

Were any insider trades reported for SILC in this Form 4?

No. The Form 4 explicitly notes that no transactions are being reported. Its sole purpose is to reflect that VP Engineering David Castiel is no longer subject to Section 16 of the Securities Exchange Act of 1934 regarding Silicom Ltd.

What change in Section 16 status is disclosed for SILC’s VP Engineering?

The document explains that David Castiel, VP Engineering of Silicom Ltd. (SILC), is no longer subject to Section 16 of the Securities Exchange Act of 1934 for the issuer, and therefore no ongoing Section 16 reporting obligations apply to him for this company.

Does this SILC Form 4 indicate any 10b5-1 trading plan activity?

No. The Form 4 indicates the Rule 10b5-1 checkbox is not affirmed, and no trades are reported. The stated purpose is only to document that David Castiel is no longer subject to Section 16 reporting for Silicom Ltd.

Who is the reporting person in the latest SILC Form 4 and what is his role?

The reporting person is David Castiel, identified as an officer of Silicom Ltd. (SILC) with the title VP Engineering. The Form 4 records that he is no longer subject to Section 16 reporting requirements for the issuer’s securities.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

X

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Castiel David

(Last) (First) (Middle)

14 ATIR YEDA

(Street)

KFAR SAVA 4464323

(City) (State) (Zip)

ISRAEL

(Country)

2. Issuer Name and Ticker or Trading Symbol
SILICOM LTD. [ SILC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	VP Engineering

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/14/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

This Form is being filed solely to reflect that the Reporting Person is no longer subject to Section 16 of the Securities Exchange Act of 1934 with respect to the Issuer. No transactions are being reported.

	/s/ Castiel David	07/29/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)