Monica J. Palko - 29 Jan 2026 Form 3 Insider Report for Yellowstone Midco Holdings II, LLC (YSS)

Role: Chief Legal and Administrative Officer Exhibit 24.1 - Power of Attorney
Signature: /s/ Monica Palko
Issuer symbol: YSS
Transactions as of: 29 Jan 2026
Net transactions value: $0
Form type: 3
Filing time: 29 Jan 2026, 20:52:07 UTC
Next filing: 03 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Palko Monica J.	Chief Legal and Administrative Officer Exhibit 24.1 - Power of Attorney	C/O YORK SPACE SYSTEMS INC., 6060 S WILLOW DRIVE, GREENWOOD VILLAGE	/s/ Monica Palko	29 Jan 2026	0002100091

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	YSS	Common Stock						680,593	29 Jan 2026	By Fox Trail Joint Revocable Trust	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Includes 119,343 shares of restricted stock which vest over two years.

Remarks:

Chief Legal and Administrative Officer Exhibit 24.1 - Power of Attorney