York Space Systems (YSS) CEO receives 211,176-share restricted stock grant

Rhea-AI Filing Summary

Wallinger Dirk reported acquisition or exercise transactions in this Form 4 filing.

York Space Systems Inc. Chief Executive Officer Dirk Wallinger reported an amended equity award of 211,176 shares of Common Stock in the form of restricted stock units that vest over three years. These units were granted at a price of $0.00 per share as compensation, not a market purchase.

Following this grant, Wallinger directly holds 9,783,222 shares of Common Stock. The amendment also clarifies that 358,744 restricted shares had already been reported previously on a Form 3 and were inadvertently double-counted in the original Form 4, so this filing corrects his disclosed holdings.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Wallinger Dirk

Role Chief Executive Officer

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	211,176	$0.00	--

Holdings After Transaction: Common Stock — 9,783,222 shares (Direct)

Footnotes (1)

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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^*

Wallinger Dirk

(Last) (First) (Middle)

C/O YORK SPACE SYSTEMS INC.

6060 S WILLOW DRIVE

(Street)

GREENWOOD VILLAGE CO 80111

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
York Space Systems Inc. [ YSS ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
01/30/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)
02/03/2026

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

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

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	01/30/2026		A		211,176(1)	A	$0	9,783,222	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. Represents restricted stock units which vest over three years. This amendment corrects the original Form 4, which inadvertently included 358,744 shares of restricted stock, which shares were previously reported by Mr. Wallinger on the Form 3 filed January 29, 2026.

	/s/ Monica Palko, by Power of Attorney	03/11/2026
	** 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.

FAQ

What insider transaction did York Space Systems (YSS) report for its CEO?

York Space Systems CEO Dirk Wallinger received 211,176 restricted stock units. These Common Stock units were granted at a price of $0.00 per share as compensation and vest over three years, increasing his directly held position to 9,783,222 shares after the award.

Is the York Space Systems (YSS) CEO’s Form 4/A filing a new purchase or a grant?

The filing reports a grant, not an open-market purchase. Dirk Wallinger acquired 211,176 shares of Common Stock through a restricted stock unit award at $0.00 per share, reflecting equity compensation that vests over three years rather than a cash-funded share purchase.

How many York Space Systems (YSS) shares does the CEO hold after this award?

After the award, Dirk Wallinger holds 9,783,222 shares of Common Stock. This total reflects his direct ownership position following the grant of 211,176 restricted stock units, as updated and corrected in the amended insider ownership report.

What does the three-year vesting of York Space Systems (YSS) restricted stock units mean?

The 211,176 restricted stock units vest over three years. Vesting over time means Wallinger’s rights to the shares become fully earned gradually, typically encouraging longer-term alignment with company performance rather than providing all shares immediately.

Why did York Space Systems (YSS) file an amended Form 4/A for its CEO?

The amendment corrects an error in the original insider report. It states that 358,744 restricted shares were inadvertently included even though they were already reported on a Form 3, so this filing adjusts the disclosed holdings to avoid double-counting.

Did York Space Systems (YSS) CEO sell any shares in this Form 4/A?

No sales are reported in this filing. The transaction is coded as a grant or award acquisition of 211,176 restricted stock units at $0.00 per share, with no dispositions or tax-withholding share sales disclosed in the transaction summary.