Company Description
York Space Systems, Inc. operates as a space and defense prime providing a comprehensive suite of mission-critical solutions for national security, government and commercial customers in the United States.
It provides space and defense primes with proprietary hardware and software capabilities designed to address customers’ requirements across the elements of the space ecosystem throughout the mission lifecycle.
The company engages in the design, production, integration, and operation of spacecraft to manage spacecraft and constellations.
It offers S-CLASS, LX-CLASS, and M-CLASS spacecraft, which are satellite platforms to a range of space market needs; and software that enables versatile integration of a variety of payloads for customers and supply chain commonalities across platforms, as well as software-enabled services.
The company was formerly known as Yellowstone Midco Holdings II, LLC and changed its name to York Space Systems, Inc. in January 2026.
York Space Systems, Inc. was founded in 2012 and is based in Greenwood Village, Colorado.
| Country | United States |
| Founded | 2012 |
| IPO Date | Jan 29, 2026 |
| Industry | Aerospace & Defense |
| Sector | Industrials |
| Employees | 670 |
| CEO | Dirk Wallinger |
Contact Details
Address: 6060 S Willow Drive Greenwood Village, Colorado 80111 United States | |
| Phone | 720 537 2655 |
| Website | yorkspacesystems.com |
Stock Details
| Ticker Symbol | YSS |
| Exchange | NYSE |
| Stock Type | Common Stock |
| Fiscal Year | January - December |
| Reporting Currency | USD |
| IPO Price | $34.00 |
| CIK Code | 2086587 |
| CUSIP Number | 987084100 |
| ISIN Number | US9870841007 |
| SIC Code | 3760 |
Key Executives
| Name | Position |
|---|---|
| Dirk Wallinger | Chief Executive Officer, President, and Director Nominee |
| Kevin Messerle | Chief Financial Officer |
| Monica Palko | Chief Legal and Administrative Officer |
| Devjyoti Rudra | Chief Supply Chain Officer |
Latest SEC Filings
| Date | Type | Title |
|---|---|---|
| Jan 30, 2026 | S-8 | Securities to be offered to employees in employee benefit plans |
| Jan 30, 2026 | 8-K | Current Report |
| Jan 30, 2026 | 424B4 | Prospectus |
| Jan 29, 2026 | CERT | Certification by an exchange approving securities for listing |
| Jan 29, 2026 | 8-A12B | Registration of securities |
| Jan 28, 2026 | EFFECT | Notice of Effectiveness |
| Jan 28, 2026 | S-1MEF | Registration adding securities to prior Form S-1 registration |
| Jan 26, 2026 | S-1/A | [Amend] General form for registration of securities under the Securities Act of 1933 |
| Jan 16, 2026 | S-1/A | [Amend] General form for registration of securities under the Securities Act of 1933 |
| Dec 15, 2025 | S-1/A | [Amend] General form for registration of securities under the Securities Act of 1933 |