The mechanism gap: how do you tax private shares that don't exist yet?
The single most underexplored detail in the Sanders rollout is that the proposal taxes private companies in stock — not cash, not profits — but OpenAI, Anthropic, and xAI all lack publicly traded shares [2]. Fox Business notes the bill explicitly names these three firms while leaving the operational machinery unspecified [2]. The Washington Times confirms the bill targets the 'largest artificial intelligence companies' without publishing revenue, valuation, or share-class thresholds for who qualifies [3]. That is not a footnote; it is the entire crux. A 50% stock tax on a private company implicitly forces one of three actions: a compulsory new share class issued to Treasury that dilutes existing investors by half, a forced public listing so the government can be paid in tradable equity, or a mandatory tender that converts cap-table positions into federally-held units. Each path detonates different legal questions, but Sanders' own op-ed and Common Dreams' coverage do not specify which path the bill takes [1][4].
This matters because the policy's political potency is inversely proportional to its drafting specificity. The headline ('50% public stake') travels at internet speed; the unwritten share-class machinery is where the bill either survives in committee or dies. Tom's Hardware notes that opponents are already arguing the proposal would deter capital formation if treated as a confiscatory precedent [9], and Reason frames the entire bill as a category error about how value and ownership work in venture-backed firms [10]. Even sympathetic readers should notice that until Sanders' office publishes the share-class mechanism — IPO trigger, dilution math, board-seat allocation per share — the bill is closer to a political signal than a working tax instrument. The strength of the framing is currently outrunning the weakness of the engineering.


