[Form 4] SkyWater Technology, Inc Insider Trading Activity

Rhea-AI Filing Summary

SkyWater Technology (SKYT) reported an insider tax-withholding transaction on a Form 4. On 10/16/2025, the issuer withheld 11,028 shares of common stock at $16.59 per share to satisfy withholding taxes related to the vesting of previously reported RSUs under Rule 16b-3.

Following this administrative transaction, the reporting person, who serves as President and COO, beneficially owned 128,713 shares, held directly. The filing was made by a single reporting person.

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

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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).

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^*

Sakamoto John

(Last) (First) (Middle)

2401 EAST 86TH STREET

(Street)

BLOOMINGTON MN 55425

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
SkyWater Technology, Inc [ SKYT ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
10/16/2025

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	10/16/2025		F(1)		11,028	D	$16.59	128,713	D

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 Issuer withheld shares of common stock that would have otherwise been issuable to the Reporting Person to satisfy the Issuers tax withholding obligations in connection with the vesting of restricted stock units previously reported by the Reporting Person in accordance with Rule 16b-3.

Remarks:

	/s/ Christopher Hilberg, Attorney-in-Fact	10/17/2025
	** 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 SkyWater (SKYT) disclose in this Form 4?

An administrative tax-withholding transaction where the issuer withheld 11,028 shares at $16.59 per share upon RSU vesting.

When did the transaction occur for SKYT?

The transaction date was 10/16/2025.

What is the transaction code and what does it indicate?

Code F, which indicates shares were withheld to cover tax withholding on equity vesting.

How many shares does the insider own after the transaction?

Beneficial ownership is 128,713 shares, held directly.

What role does the reporting person hold at SkyWater?

The reporting person is an Officer, serving as President and COO.

Was this sale under a Rule 10b5-1 trading plan?

The excerpt includes the 10b5-1 checkbox language; it does not indicate that the box was checked.

What triggered the share withholding?

The vesting of restricted stock units, as explained in the filing’s Explanation of Responses.