[Form 4] Shimmick Corporation Insider Trading Activity

Rhea-AI Filing Summary

Mitchell B. Goldsteen, a director and >10% owner of Shimmick Corporation (SHIM), reported sales of common stock under a Rule 10b5-1 plan. The Form 4 shows 6,300 shares were sold on 08/14/2025 at a weighted average price of $2.11 and 30,805 shares were sold on 08/15/2025 at a weighted average price of $2.23, for a total of 37,105 shares disposed. The filing states Mr. Goldsteen holds indirect beneficial ownership through GOHO, LLC, with reported post-transaction holdings of 21,134,308 to 21,165,113 shares depending on the line reported. The sales were effected pursuant to a plan adopted August 20, 2024, and the Form 4 was signed by power of attorney on 08/18/2025.

Positive

• Sales were executed under a Rule 10b5-1 plan, indicating scheduled, pre-authorized transactions
• Timely disclosure via Form 4 with weighted-average prices and offer to provide per-price detail on request
• Reporting clarifies indirect ownership through GOHO, LLC and disclaimers of pecuniary interest

Negative

• Insider disposed of 37,105 shares, which may be viewed negatively by some investors despite being via a 10b5-1 plan

Insights

Securities Analyst

TL;DR: Director sold 37,105 shares via a 10b5-1 plan; ownership remains large, indicating routine liquidity rather than a controlling stake change.

The reported transactions are sales executed under a pre-established Rule 10b5-1 plan, which typically indicates scheduled, non-discretionary disposals and reduces likelihood of opportunistic insider trading. The aggregate sale of 37,105 shares at weighted average prices of $2.11 and $2.23 is small relative to the reported indirect holdings above 21 million shares, so the transactions are unlikely to materially alter control or capital structure. Disclosure is complete regarding weighted-average price ranges and indirect ownership through GOHO, LLC, with standard disclaimers of pecuniary interest.

Corporate Governance Expert

TL;DR: Use of a 10b5-1 plan and timely Form 4 filing reflect adherence to insider trading policies and disclosure requirements.

The filing documents compliance with Rule 10b5-1 via an August 20, 2024 plan, which is consistent with good governance practices for scheduled insider sales. The reporting person is identified as a director and >10% owner and discloses indirect ownership through an LLC, which clarifies beneficial ownership lines. The Form 4 includes weighted-average pricing and offers to provide detailed per-price breakdowns upon request, supporting transparency. No amendments or additional material related-party transactions are disclosed.

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

X

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^*

Goldsteen Mitchell B.

(Last) (First) (Middle)

C/O SHIMMICK CORPORATION

530 TECHNOLOGY DRIVE, SUITE 300

(Street)

IRVINE CA 92618

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Shimmick Corp [ SHIM ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
08/14/2025

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

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

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

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
Common Stock, par value $0.01 per share	08/14/2025	08/14/2025	S(1)		6,300	D	$2.11(2)	21,165,113	I	By GOHO, LLC(3)
Common Stock, par value $0.01 per share	08/15/2025	08/15/2025	S(1)		30,805	D	$2.23(4)	21,134,308	I	By GOHO, LLC(3)

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. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 sales plan adopted by the reporting person on August 20, 2024.

2. The price reported in column 4 is a weighted average price. The shares were acquired in multiple transactions at prices ranging from $2.04 to $2.14, inclusive. Upon request by the SEC staff, the issuer, or any security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price will be provided.

3. The reporting person owns the securities indirectly through GOHO, LLC, of which Mr. Goldsteen is the sole managing member. Mr. Goldsteen disclaims beneficial ownership of these securities, except to the extent of any pecuniary interest therein.

4. The price reported in column 4 is a weighted average price. The shares were acquired in multiple transactions at prices ranging from $2.11 to $2.30, inclusive. Upon request by the SEC staff, the issuer, or any security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price will be provided.

	/s/ John Carpenter, Power of Attorney for Mitchell B. Goldsteen	08/18/2025
	** 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.

FAQ

What transactions did Mitchell B. Goldsteen report on the Form 4 for SHIM?

The Form 4 reports sales of 6,300 shares on 08/14/2025 at a weighted average price of $2.11 and 30,805 shares on 08/15/2025 at $2.23, totaling 37,105 shares sold.

Were the sales by the SHIM director pre-planned or discretionary?

Yes. The sales were effected pursuant to a Rule 10b5-1 sales plan adopted on August 20, 2024, per the Form 4 explanation.

How much SHIM stock does the reporting person beneficially own after these transactions?

The Form 4 shows indirect beneficial ownership through GOHO, LLC of approximately 21.13 million to 21.17 million shares following the reported transactions.

How is Mitchell B. Goldsteen's ownership held according to the filing?

The filing states he owns the securities indirectly through GOHO, LLC, of which he is the sole managing member, and disclaims beneficial ownership except for any pecuniary interest.

When was the Form 4 signed and by whom?

The Form 4 was signed by John Carpenter, as Power of Attorney for Mitchell B. Goldsteen on 08/18/2025.