Why 25% is the most dangerous number in Deep Tech today

In my 15+ years at TSVC, I’ve reviewed thousands of cap tables. Historically, the math was simple: Who has the equity? Who has the voting rights?

But in 2026, the OBBB Act and new FEOC (Foreign Entity of Concern) rules have turned the cap table into a national security document.

For the next generation of deep-tech founders — particularly repatriates — there is an “Invisible Wall” you must understand: The 24.9% Guardrail.

If a single “Specified Foreign Entity” (SFE) — which can include founders still navigating the green card process or entities with certain foreign ties — owns 25.0% or more of your voting equity, the regulatory landscape shifts beneath your feet.

The cost of crossing that 0.1% line?

· Tax Credit Disqualification: Instant loss of eligibility for Section 45X and 48E credits. In hardware and energy, these credits are often the difference between a viable business and a shuttered one.

· Supply Chain Barriers: Many U.S. federal contracts and Tier-1 commercial partners now require a “Clean” ownership certification.

· CFIUS Scrutiny: Crossing this threshold often triggers mandatory filings that can stall a Series B or C round for months, or lead to forced divestiture orders.

Governance is as critical as Equity: It isn’t just about the percentage on the cap table. In 2026, “Effective Control” is the new standard. If a foreign entity has the right to appoint “Covered Officers” — such as your CEO, CFO, or a majority of the Board — you may be flagged as a Foreign Influenced Entity (FIE) regardless of your ownership stake.

In 2011, when we backed Zoom, the rules of the game were different. In 2026, compliance isn’t just a legal chore — it is a core pillar of your valuation.

Investors: Are you auditing the voting rights of your foreign-born founders, or just their equity? Founders: Are you prepared for the “Sovereignty Audit” of your cap table?