Yellowstone Midco (YSS) CAO granted 10,294 restricted stock units

Rhea-AI Filing Summary

Yellowstone Midco Holdings II, LLC (YSS) reported an equity award to its Chief Accounting Officer, Brian D. Frantz. On January 30, 2026, he was granted 10,294 shares of common stock, reported as restricted stock units that vest over three years at a stated price of $0 per share. Following this grant, he directly beneficially owns 16,000 shares of common stock.

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

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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^*

Frantz Brian D

(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
Yellowstone Midco Holdings II, LLC [ YSS ]

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

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

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

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	01/30/2026		A		10,294(1)	A	$0	16,000	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.

	/s/ Monica Palko, by Power of Attorney	02/03/2026
	** 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).
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FAQ

What insider transaction did Yellowstone Midco (YSS) report on this Form 4?

The filing reports an equity grant to Chief Accounting Officer Brian D. Frantz. On January 30, 2026, he received 10,294 shares of common stock, reported as restricted stock units vesting over three years, at a stated price of $0 per share.

How many Yellowstone Midco (YSS) shares were granted to the Chief Accounting Officer?

Brian D. Frantz was granted 10,294 shares of Yellowstone Midco common stock. These are described in the footnotes as restricted stock units that vest over three years, meaning the award becomes fully earned gradually across that vesting period.

What is the vesting schedule for the Yellowstone Midco (YSS) restricted stock units?

The restricted stock units vest over three years. This means the 10,294-unit award to Chief Accounting Officer Brian D. Frantz becomes owned in stages across a three-year period, rather than all at once on the grant date.

What was the reported price per share for the YSS equity grant on this Form 4?

The Form 4 lists a transaction price of $0 per share for the 10,294-share award. This reflects a restricted stock unit grant rather than an open-market purchase, consistent with the footnote description of time-based vesting over three years.

How many Yellowstone Midco (YSS) shares does the insider own after this transaction?

After the reported grant, Chief Accounting Officer Brian D. Frantz beneficially owns 16,000 shares of Yellowstone Midco common stock. The filing shows these shares as held directly, following the addition of the 10,294-share restricted stock unit award.

Is the Yellowstone Midco (YSS) Form 4 filing for direct or indirect ownership?

The Form 4 indicates that Brian D. Frantz holds the reported 16,000 shares directly. The ownership column lists the holdings as “D” for direct ownership, and no nature of indirect beneficial ownership is specified in the transaction table.