[Form 3] Yellowstone Midco Holdings II, LLC Initial Statement of Beneficial Ownership

Yellowstone Midco Holdings II, LLC (YSS) filed an initial insider ownership report for Chief Accounting Officer Brian D. Frantz as of January 29, 2026.

Rhea-AI Filing Summary

Yellowstone Midco Holdings II, LLC (YSS) filed an initial insider ownership report for Chief Accounting Officer Brian D. Frantz as of January 29, 2026. The filing shows he beneficially owns 5,706 shares of common stock, held directly.

His holdings include 3,804 shares of restricted stock that vest over two years, indicating a meaningful portion of his stake is subject to ongoing service or performance conditions. No derivative securities, such as options or warrants, are reported in this filing.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Frantz Brian D

Role Chief Accounting Officer

Type	Security	Shares	Price	Value
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 5,706 shares (Direct)

Footnotes (1)

1. F1. Includes 3,804 shares of restricted stock which vest over two years.

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Accepted by SEC EDGAR 02/03/2026 - 08:52 PM Learn about SEC filing dates

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
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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. Date of Event Requiring Statement (Month/Day/Year)
01/29/2026

3. Issuer Name and Ticker or Trading Symbol
Yellowstone Midco Holdings II, LLC [ YSS ]

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

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

5. 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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	5,706(1)	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Includes 3,804 shares of restricted stock which vest over two years.

Remarks:

Exhibit 24.1 - Power of Attorney

	/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 5 (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.