Welcome to our dedicated page for York Space Systems (Yellowstone) SEC filings (Ticker: YSS), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Our SEC filing database is enhanced with expert analysis from Rhea-AI, providing insights into the potential impact of each filing on York Space Systems (Yellowstone)'s stock performance. Each filing includes a concise AI-generated summary, sentiment and impact scores, and end-of-day stock performance data showing the actual market reaction. Navigate easily through different filing types including 10-K annual reports, 10-Q quarterly reports, 8-K current reports, proxy statements (DEF 14A), and Form 4 insider trading disclosures.
Designed for fundamental investors and regulatory compliance professionals, our page simplifies access to critical SEC filings. By combining real-time EDGAR feed updates, Rhea-AI's analytical insights, and historical stock performance data, we provide comprehensive visibility into York Space Systems (Yellowstone)'s regulatory disclosures and financial reporting.
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.
Yellowstone Midco Holdings II, LLC director Erwin Tami A. reported two transactions in the company’s common stock dated January 30, 2026. He received 5,294 restricted stock units, which vest on the first anniversary of the grant date, at a price of $0 per unit.
On the same date, he purchased 2,941 shares of common stock at $34 per share, which represents the price to the public in the issuer’s initial public offering. After these transactions, he directly held 79,984 shares of common stock.
Yellowstone Midco Holdings II, LLC’s Chief Financial Officer, Kevin Messerle, reported receiving 80,882 shares of common stock on January 30, 2026. These were awarded at a price of $0 per share as restricted stock units that vest over three years.
Following this grant, Messerle directly holds 80,882 common shares and indirectly holds 917,437 common shares through the Messerle Joint Trust.
Yellowstone Midco Holdings II, LLC (YSS)
Yellowstone Midco Holdings II, LLC director James McConville received an equity grant in the form of restricted stock units. On 01/30/2026, he was awarded 5,294 shares of common stock at a price of $0 per share. These units vest on the first anniversary of the grant date. Following this award, he beneficially owns 5,294 shares directly.
Yellowstone Midco Holdings II, LLC Chief Executive Officer and director Dirk Wallinger reported an equity award in the company’s common stock. On January 30, 2026, he was granted 569,920 restricted stock units at a price of $0 per share, which vest over three years.
After this grant, Wallinger beneficially owns 10,141,966 shares of common stock directly. In addition, common stock is held indirectly, including 227,441 shares by Ghostrider 117 LLC and 1,369,106 shares by DHW Irrevocable Trust.
Yellowstone Midco Holdings II, LLC director Tyler Letarte reported two stock transactions dated January 30, 2026. He received 5,294 shares of common stock as a grant of restricted stock units that vest on the first anniversary of the grant date, at a stated price of $0 per share. On the same date, 1,470 shares of common stock were purchased at $34 per share, representing the price to the public in the issuer's initial public offering, and are reported as indirectly owned through his spouse.
Yellowstone Midco Holdings II, LLC reported an equity grant to director Boyd Andrew. On 01/30/2026 he acquired 5,294 shares of common stock at a price of $0, recorded as a grant of restricted stock units. These units vest on the first anniversary of the grant date, and Andrew now beneficially owns 5,294 shares directly.
Yellowstone Midco Holdings II, LLC director Louis R. Brothers Jr reported an equity grant of 5,294 shares of common stock on January 30, 2026. The filing shows these were awarded at a price of $0 per share, indicating a stock-based compensation grant rather than a market purchase.
The award consists of restricted stock units that vest on the first anniversary of the grant date5,294 common shares, all held directly.
Yellowstone Midco Holdings II, LLC reported that officer Monica J. Palko, Chief Legal and Administrative Officer, received an award of 54,412 shares of common stock on January 30, 2026. The award is in the form of restricted stock units that vest over three years and was granted at $0 per share.
Following this grant, Palko directly holds 54,412 shares of common stock. She is also reported as indirectly holding 680,593 shares of common stock through the Fox Trail Joint Revocable Trust.