México’s legal press on the firm behind the GRC Engine.
In print — Líderes Mexicanos · MX
Líderes Mexicanos · Abogados 2026
Two founders. One cover.
Líderes Mexicanos puts founding partners Víctor Aguirre and Carlos Aguerrebere on the cover of the 11th Abogados edition, the annual review that maps México’s legal structure, recognizing a new model of legal practice built on innovation. Twelve years advising venture-backed startups across two legal systems, from amparo wins to AI-run compliance.
“Impulso a las startups en crecimiento.”
Cover line — Líderes Mexicanos, 2026Momentum for startups in growth.
Edition
Abogados: La Estructura Jurídica de México · 2026
Cover story
“Los socios legales de las startups” · Apr 2026
In the press
El Financiero — Reconocimiento al Liderazgo Jurídico 2026
Cited as expert counsel by Mexico's leading press.
Journalists at Mexico's top business dailies, and across Latin America, quote BlackBox on the questions we practice: digital-economy tax, fintech, venture capital, nearshoring and AI. A decade on the record, coverage, not advertising.
Two legal systems. One GRC Engine. Zero sleepless 16ths.
The Legal & Tax GRC Engine — Governance, Risk & Compliance, built and supervised by BlackBox lawyers, watches every obligation on both sides of the border, files what's due, and sends the evidence to your inbox. The 17th comes and goes; you hear about it in a report, not a midnight text. Controlled. Supervised. Off your mind.
Custom AI solutions for your legal & tax stack, contract intelligence, obligation tracking, entity management, compliance workflows, designed by our lawyers, trained on your entities and jurisdictions. Your team owns and runs the software.
ENGAGEMENT: DESIGN → BUILD → HANDOVER
MODEL B
We run it. GRC autopilot.
The GRC Engine monitors every obligation of your Mexican subsidiary — SAT, IMSS, RNIE, AML/UBO, labor, and BlackBox lawyers review, file and sign. Your parent gets evidence on a US calendar: SOX sub-cert ready, FCPA books clean, screening logs on demand.
ENGAGEMENT: MONTHLY AUTOPILOT · LAWYERS ON THE LOOP
02 — THE GRC ENGINE CONSOLE
Not a chatbot. A control tower.
Your Mexican subsidiary lives in one console: every obligation, deadline, credential and filing, with an alarm radar that escalates 🟢 1 month, 🟡 15 days and 🔴 1 week before anything is due.
↳ THIS ONE IS LIVE — CLICK THE MODULES.
→Entity manager: cap table, actas, powers of attorney, corporate books
Two governments. One controller. Nobody shares a calendar.
Your parent runs on a quarterly close. Mexico runs on the 17th of every month. They were not designed to coexist, and the person standing between them is one finance lead in Mexico City.
U.S. parent obligationMexican statutory obligationBoth, inside the same window
{{calMo}}
{{calSub}}
U.S. parent
Nothing falls due.
{{o.d}}{{o.t}} {{o.c}}
Mexican entity
Nothing falls due.
{{o.d}}{{o.t}} {{o.c}}
Deadlines shown for a December fiscal-year-end issuer with a Mexican operating subsidiary. Mexican dates recur monthly unless noted; U.S. dates assume large-accelerated-filer timing. Your calendar will differ, that is the point of the assessment.
This chart is one scenario. We build the same calendar for your company, your parent's filings, your Mexican statutes, every alarm and citation, compiled by the Engine, maintained by our lawyers.BUILD MY CALENDAR — FREE 30-MIN
07 — THE FIRM BEHIND THE GRC ENGINE
Full-service since 2014. We negotiated the first ride-sharing regulation in Latin America, and closed Jüsto's Series A, the largest in Latin American history.
The GRC Engine isn't a startup experiment, it's a decade of US–LATAM practice, compiled. As counsel to Cabify we obtained the amparo against Mexico City's taximeter rule and annulled PROFECO's millionaire fine. Nine practices stand behind every filing.
CABIFYJÜSTOCLIVIKOLORS— SOME OF THE STARTUPS WE'VE WORKED WITH
FOR THE INVESTORS BEHIND THEM
The counsel VCs point their portfolio companies to.
A clean company is an easier investment. Funds send us the founders in their portfolio expanding into Mexico, because we build the corporate hygiene diligence re-opens, and give the GP one bilingual team accountable on both sides of the border.
Diligence-ready by default
Clean cap tables, complete IP assignment and valid corporate books, the schedule your term sheet re-opens, built right the first time.
One team, both borders
US parent and Mexican subsidiary under one bilingual firm, no coordinating two counsels across a language and a legal system.
Evidence your GP can see
The Engine keeps the Mexican sub audit-ready on a US calendar, so portfolio reviews and the next round start from a clean file.
The choice of a lawyer is a very important decision and should not be based solely upon advertisements. If you are not already one of our clients, the attorney-client relationship can only be established after we have discussed the matter with you, run a conflicts check, and you and we have both agreed to the terms of the engagement. Until such time, do not send us any confidential or sensitive information. AI outputs are reviewed by licensed attorneys; this page is not legal advice.
Cross-border tax and venture financing counsel for founders and the investors behind them. We know AI the way we know the tax code.
AI LEGAL & TAX ADVISOR
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México’s legal press on the firm behind the GRC Engine.
In print — Líderes Mexicanos · MX
Líderes Mexicanos · Abogados 2026
Two founders. One cover.
Líderes Mexicanos puts founding partners Víctor Aguirre and Carlos Aguerrebere on the cover of the 11th Abogados edition, the annual review that maps México’s legal structure, recognizing a new model of legal practice built on innovation. Twelve years advising venture-backed startups across two legal systems, from amparo wins to AI-run compliance.
“Impulso a las startups en crecimiento.”
Cover line — Líderes Mexicanos, 2026 Momentum for startups in growth.
Edition
Abogados: La Estructura Jurídica de México · 2026
Cover story
“Los socios legales de las startups” · Apr 2026
In the press
El Financiero — Reconocimiento al Liderazgo Jurídico 2026
Cited as expert counsel by Mexico's leading press.
Journalists at Mexico's top business dailies, and across Latin America, quote BlackBox on the questions we practice: digital-economy tax, fintech, venture capital, nearshoring and AI. A decade on the record, coverage, not advertising.
Custom AI solutions for your legal & tax stack, contract intelligence, obligation tracking, entity management, compliance workflows, designed by our lawyers, trained on your entities and jurisdictions. Your team owns and runs the software.
ENGAGEMENT: DESIGN → BUILD → HANDOVER
MODEL B
We run it. GRC autopilot.
The GRC Engine monitors every obligation of your Mexican subsidiary — SAT, IMSS, RNIE, AML/UBO, labor, and BlackBox lawyers review, file and sign. Your parent gets evidence on a US calendar: SOX sub-cert ready, FCPA books clean, screening logs on demand.
ENGAGEMENT: MONTHLY AUTOPILOT · LAWYERS ON THE LOOP
02 — THE GRC ENGINE CONSOLE
Not a chatbot. A control tower.
Your Mexican subsidiary lives in one console: every obligation, deadline, credential and filing, with an alarm radar that escalates 🟢 1 month, 🟡 15 days and 🔴 1 week before anything is due.
↳ THIS ONE IS LIVE — CLICK THE MODULES.
Entity manager: cap table, actas, powers of attorney, corporate books
AI insight.All federal filings current. One watch item: platform-economy withholding informativa due day 10, evidence pack drafted, lawyer review pending.
03 — WHAT THE GRC ENGINE WATCHES
Every obligation. Both sides of the border.
33 REFORM CHANGES TRACKED FOR 2026 11 HIGH-SEVERITY FLAGGED
↳ CLICK A DOMAIN FOR ITS DETAIL SHEET
Taxes (SAT) ›
ISR · IVA día 17 DIOT · balanza día 3 ISSIF (CFF 32-H) Dictamen SIPRED · CFDI 4.0
Two governments. One controller. Nobody shares a calendar.
Your parent runs on a quarterly close. Mexico runs on the 17th of every month. They were not designed to coexist, and the person standing between them is one finance lead in Mexico City.
U.S. parent obligation
Mexican statutory obligation
Both, inside the same window
May
8 OBLIGATIONS
U.S. parent
~10th
Form 10-Q due — 45 days after quarter close Exchange Act
Disclosure committee convenes 30–40 days post-close
Mexican entity
17th
Monthly ISR, IVA, IMSS and INFONAVIT every month
3rd bd
Electronic-accounting balanza (XML), for the month before last CFF Art. 28 fr. IV · Anexo 24
15th
Transfer-pricing Local File, in Spanish LISR Art. 76-A
15th
DIM Annex 9 informative return LISR Art. 76
30th
PTU, statutory profit sharing paid to employees LFT, capped 2021
spring
RNIE annual economic report above MXN $110m
Deadlines shown for a December fiscal-year-end issuer with a Mexican operating subsidiary. Mexican dates recur monthly unless noted; U.S. dates assume large-accelerated-filer timing. Your calendar will differ, that is the point of the assessment.
This chart is one scenario. We build the same calendar for your company, your parent's filings, your Mexican statutes, every alarm and citation, compiled by the Engine, maintained by our lawyers.
Full-service since 2014. We negotiated the first ride-sharing regulation in Latin America, and closed Jüsto's Series A, the largest in Latin American history.
The GRC Engine isn't a startup experiment, it's a decade of US–LATAM practice, compiled. As counsel to Cabify we obtained the amparo against Mexico City's taximeter rule and annulled PROFECO's millionaire fine. Nine practices stand behind every filing.
The counsel VCs point their portfolio companies to.
A clean company is an easier investment. Funds send us the founders in their portfolio expanding into Mexico, because we build the corporate hygiene diligence re-opens, and give the GP one bilingual team accountable on both sides of the border.
Diligence-ready by default
Clean cap tables, complete IP assignment and valid corporate books, the schedule your term sheet re-opens, built right the first time.
One team, both borders
US parent and Mexican subsidiary under one bilingual firm, no coordinating two counsels across a language and a legal system.
Evidence your GP can see
The Engine keeps the Mexican sub audit-ready on a US calendar, so portfolio reviews and the next round start from a clean file.
The choice of a lawyer is a very important decision and should not be based solely upon advertisements. If you are not already one of our clients, the attorney-client relationship can only be established after we have discussed the matter with you, run a conflicts check, and you and we have both agreed to the terms of the engagement. Until such time, do not send us any confidential or sensitive information. AI outputs are reviewed by licensed attorneys; this page is not legal advice.
