Silicom (SILC) VP Engineering trustee account sells 2,000 shares at $48

Rhea-AI Filing Summary

SILICOM LTD. Vice President of Engineering David Castiel reported an open-market sale of 2,000 ordinary shares of the company at $48.00 per share. The shares were held indirectly by a trustee under the company’s equity incentive plan, and this particular trustee-held position now shows 0 shares remaining after the transaction.

Insider Trade Summary

Net Seller: 2,000 shares ($96,000)

Net Sell 1 txn

Insider Castiel David

Role VP Engineering

Sold 2,000 shs ($96K)

Type	Security	Shares	Price	Value
Sale	Ordinary shares	2,000	$48.00	$96K

Holdings After Transaction: Ordinary shares — 0 shares (Indirect, By Trustee)

Footnotes (1)

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Key Figures

Shares sold: 2,000 shares Sale price: $48.00 per share Shares after transaction: 0 shares +1 more

4 metrics

Shares sold 2,000 shares Open-market sale of ordinary shares

Sale price $48.00 per share Price for the 2,000 ordinary shares sold

Shares after transaction 0 shares Trustee-held position reported in this line item

Transaction direction Sell (open-market sale) Form 4 transaction code S, non-derivative

Key Terms

open-market sale, Ordinary shares, equity incentive plan, By Trustee

4 terms

open-market sale financial

"transaction_action: open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Ordinary shares financial

"security_title: Ordinary shares"

Ordinary shares are a type of ownership stake in a company, giving shareholders a right to participate in the company’s profits and decision-making through voting. They are similar to owning a piece of a business, and their value can rise or fall based on the company's performance. Investors buy ordinary shares to potentially earn dividends and benefit from the company's growth over time.

equity incentive plan financial

"held by a trustee pursuant to the Issuer's equity incentive plan"

An equity incentive plan is a program that gives employees, executives or directors the right to receive company stock or options to buy stock as part of their pay. Think of it as offering slices of future company profit to motivate people to boost long‑term performance; for investors it matters because it can align employee goals with shareholder value but also increases the number of shares outstanding, which can dilute existing ownership.

By Trustee financial

"nature_of_ownership: By Trustee"

Form 4 Insider Transactions: What Each Field Means →

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

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)
05/14/2026

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
Ordinary shares	05/14/2026		S		2,000	D	$48	0	I	By Trustee(1)

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:

1. These securities are held by a trustee pursuant to the Issuer's equity incentive plan.

	/s/ Castiel David	05/18/2026
	** 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)

FAQ

What insider transaction did SILICOM LTD. (SILC) report for David Castiel?

SILICOM LTD. reported that Vice President of Engineering David Castiel was associated with an open-market sale of 2,000 ordinary shares at $48.00 per share. The transaction involved shares held indirectly by a trustee under the company’s equity incentive plan.

At what price were the SILICOM LTD. (SILC) shares sold in this Form 4?

The reported transaction shows an open-market sale at $48.00 per share for SILICOM LTD. ordinary shares. This price applies to the entire block of 2,000 shares sold in the transaction disclosed for Vice President of Engineering David Castiel.

How many SILICOM LTD. (SILC) shares were sold in the latest Form 4 filing?

The filing shows a single open-market sale of 2,000 ordinary shares of SILICOM LTD. These shares were held indirectly by a trustee pursuant to the issuer’s equity incentive plan, and the position reported under this holding now stands at zero shares.

Was the SILICOM LTD. (SILC) insider sale direct or indirect ownership?

The reported sale involved indirect ownership marked as “By Trustee.” According to the footnote, these securities were held by a trustee under SILICOM LTD.’s equity incentive plan, rather than as directly held shares by David Castiel personally.

Does the SILICOM LTD. (SILC) Form 4 show any remaining shares after the sale?

For this reported holding, the Form 4 lists 0 shares owned following the transaction. This indicates that the trustee-held position under the equity incentive plan, associated with this particular line item, was fully sold out in the disclosed 2,000-share transaction.