How a private cap-table stake becomes a big 13F line through merger, IPO, and quarterly fair-value marking Nvidia capital AI-ecosystem public common stock convertible pref / warrants Public common stock reportable in the 13F Private cap-table convertible preferred pre-funded warrants not in 13F Reportability gate merger: xAI to SpaceX IPO - Jun 2026 quarter-end mark pre-IPO stake reportable 13F report quarter-end filing public common Converted holding marked to public price reads as a big line quarterly value re-mark same mechanism surfaced Alphabet's stake from a ~2015-era investment big 13F line = reportability + fair-value re-mark, not necessarily new capital that quarter