Why the classic S.A. falls short
When a serious investor comes into a business, they ask for things that the traditional S.A. under the LGSM (General Law of Commercial Companies) handles poorly: shares with rights that depart from "one share, one vote," enforceable exit covenants, minority protection without needing 25% of the capital. The reform that created the Sociedad Anónima Promotora de Inversión (Securities Market Law, 2006) attacked exactly those bottlenecks. It is still a stock corporation — incorporated the same way, taxed the same way — but with an expanded statutory menu.
The menu that makes it special (Securities Market Law arts. 12–18)
- Tailored share series: shares without vote, with votes restricted to certain matters, with a preferred dividend, or with a veto over key decisions. Capital is structured as the business needs it.
- Valid and enforceable shareholder agreements: joint-sale rights (tag-along), drag rights (drag-along), call/put options, non-compete, transfer restrictions. In the classic S.A. many of these covenants live in limbo; in the SAPI, the law recognizes them expressly.
- Minorities with teeth starting at 10%: appointing a director and exercising minority actions with reduced thresholds versus the traditional 25% — the protection a fund or an angel investor demands before writing the check.
- Buyback of its own shares: a mechanism for exits and equity plans without the rigidities of the LGSM.
SAPI and private credit: how it is used in practice
In the world of private financing, the SAPI shows up in two roles:
- As the vehicle of the business raising capital: the entrepreneur converts their S.A. into a SAPI (or incorporates one) to bring in investors with professional share series and shareholder agreements. The money comes in as risk capital — with no promise of repayment, which is precisely what keeps it out of deposit-taking.
- As the vehicle of the lender: a private-credit firm — like Tunton Fin, S.A.P.I. de C.V. — uses the form to organize its own partners: series with different economic rights, agreed corporate governance, civilized entries and exits. The partners contribute capital to the firm; the firm lends its own capital.
What the SAPI is NOT
No corporate type is a license to take deposits: a SAPI that receives money from the public promising to return it with a yield falls under art. 103 of the LIC (Mexican Credit Institutions Law) just like anyone else — the corporate suit does not change the act. The SAPI organizes determinate partners who buy risk; we explain where the deposit-taking line runs in irregular deposit-taking.
Checklist to incorporate (or migrate to) a SAPI
- Design the series before the percentages: who decides what, who gets paid first?
- Shareholder agreement with tag/drag, options and non-compete — and a deadlock-breaking mechanism.
- Define the capital-increase regime from day one (pre-emptive rights, anti-dilution).
- Align bylaws and agreement: an agreement that contradicts the bylaws breeds disputes, not certainty.
- With investors on board, auditable accounting and documented shareholder meetings — serious capital stays where there is order.