York Space Systems YSS Insider Ownership

Updated Oct 10, 2026

Over the past year, YSS insiders bought $25.73 million of stock (756.91K shares) and sold $27.07 million (1.88Mn shares) on the open market.

• York Space Systems' open-market purchases in the past 12 months came from 3 insiders, and its sales from one insider.
• Among YSS insiders, Blackrock Portfolio Management LLC (10% owner) bought the most stock on the open market in the past 12 months: $25.59 million (752.5K shares), most recently on January 30, 2026.
• On the sell side, Blackrock Portfolio Management LLC (10% owner) led open-market sales of York Space Systems stock over the past 12 months with $27.07 million (1.88Mn shares), most recently on August 7, 2026.
• Away from the open market, YSS insiders received 3.97Mn shares in stock awards over the last 12 months.
• Business Quant data puts insider holdings in YSS at 59.84Mn shares across insiders' latest Form 4 filings, up 1.63% from 58.88Mn shares at the end of Q2 2026.
• York Space Systems insiders hold 10.4Mn shares directly (17.39% of their total) and 49.43Mn shares (82.61%) indirectly, through entities such as trusts and partnerships.
• Holdings in York Space Systems stock are reported by 14 insiders, the officers, directors and 10% owners who have filed a Form 4 in the past two years.
• York Space Systems' top three insider holders by shares held are Aeroequity GP, LLC (10% owner, 32.92Mn shares), Blackrock Portfolio Management LLC (10% owner, 16.52Mn shares) and Dirk Wallinger (Chief Executive Officer, 9.78Mn shares).
• The holding of Aeroequity GP, LLC makes up 55.01% of all shares held by York Space Systems insiders.
• Institutional investors held 50.26% of York Space Systems stock at the end of Q2 2026, while the latest Form 4 filings of its insiders account for about 46.27%; other investors, including the public, hold roughly 3.47%.
• A total of 22 Form 4 filings with transactions in York Space Systems stock were made over the past 12 months, by 14 insiders.
• Insider figures for YSS include Form 4 filings through August 10, 2026.