[Form 4] Shimmick Corporation Insider Trading Activity

Rhea-AI Filing Summary

Mitchell B. Goldsteen, a director and reported 10% owner of Shimmick Corporation (SHIM), sold 9,229 shares of SHIM common stock on 08/27/2025 at a weighted average price of $3.32 per share. The filing states the sales were executed under a Rule 10b5-1 trading plan adopted by the reporting person on 08/20/2024 and that the individual holds 21,125,079 shares indirectly through GOHO, LLC, of which he is the sole managing member. The reported per-share trades occurred at prices ranging from $3.30 to $3.36. The Form 4 was signed by John Carpenter under power of attorney for Mr. Goldsteen.

Positive

• Sale executed under a Rule 10b5-1 plan, indicating pre-authorized trades rather than opportunistic insider transactions
• Clear disclosure of indirect ownership (21,125,079 shares held via GOHO, LLC) which aids transparency

Negative

• None.

Insights

Financial Analyst

TL;DR: Routine insider sale under a 10b5-1 plan; small position change relative to large indirect holding, so limited market impact.

The Form 4 documents a specific disposal of 9,229 shares at a weighted average of $3.32 executed under a pre-established 10b5-1 plan, which indicates the trades were pre-authorized and not ad hoc. The remaining reported beneficial ownership of 21,125,079 shares is held indirectly via GOHO, LLC, implying the transaction represents a de minimis change versus the total reported holdings. Because the filing discloses the plan adoption date and price range ($3.30–$3.36), investors can verify the transaction timing and execution characteristics. No derivative positions or additional compensatory transactions are reported.

Corporate Governance Expert

TL;DR: Disclosure follows standard governance practices; use of 10b5-1 plan and POA signature are compliant with routine insider reporting norms.

The report identifies the reporting person as both a director and a greater-than-10% owner and expressly states the sale was effected pursuant to a Rule 10b5-1 plan adopted on 08/20/2024, which provides an affirmative defense to insider trading claims when properly implemented. The filing also clarifies indirect ownership via GOHO, LLC and includes a power-of-attorney signature, both common in executive filings. There are no indications of additional material governance concerns within the text provided.

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).

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)
08/27/2025

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	08/27/2025	08/27/2025	S(1)		9,229	D	$3.32(2)	21,125,079	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 $3.30 to $3.36, 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.

	/s/ John Carpenter, Power of Attorney for Mitchell B. Goldsteen	08/27/2025
	** 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 did the SHIM insider sell and when?

Mitchell B. Goldsteen sold 9,229 shares of Shimmick Corporation common stock on 08/27/2025.

At what price were the SHIM shares sold?

The shares were sold at a weighted average price of $3.32 per share, with individual trade prices ranging from $3.30 to $3.36.

Was the sale part of a pre-existing trading plan for SHIM insiders?

Yes. The Form 4 states the sales were effected pursuant to a Rule 10b5-1 sales plan adopted on 08/20/2024.

How many SHIM shares does the reporting person beneficially own after the sale?

The reporting person is reported to beneficially own 21,125,079 shares indirectly through GOHO, LLC following the transaction.

Does the Form 4 show direct ownership or indirect ownership for SHIM?

The Form 4 discloses indirect beneficial ownership through GOHO, LLC and states Mr. Goldsteen is the sole managing member.