Ticker: AMX
Exchange: NYSE / BMV (AMXB)
Role: Controlling family; Carlos Slim Helú is honorary chairman; son Carlos Slim Domit chairs the board (Apr 2026)
Stake: Family Trust 29.5% of B shares; Slim family members directly 22.9% of B shares (incl. Carlos Slim Helú individually 8.6%)
Stake as of: 2026-03-31

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Grupo Carso (conglomerate: industrial, construction, retail, energy)GCARSOA1 · BMV · Founder · Family owns 76% (per Forbes) · as of Sep 2026

Ticker: GCARSOA1
Exchange: BMV
Role: Founder; family controls
Stake: Family owns 76% (per Forbes)
Stake as of: 2026-09-24

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Grupo Financiero Inbursa (banking, insurance, brokerage)GFINBURO · BMV · Founder

Ticker: GFINBURO
Exchange: BMV
Role: Founder; family-controlled (Inbursa co-files Slim family 13G reports)

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Telekom Austria / A1 Group (via América Móvil)TKA · Vienna · Controlled by América Móvil under… · América Móvil held 60.9% · as of Dec 2025

Ticker: TKA
Exchange: Vienna
Role: Controlled by América Móvil under 10-year syndicate agreement with ÖBAG (signed Feb 6, 2023)
Stake: América Móvil held 60.9%
Stake as of: 2025-12-31

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Zamajal, S.A. de C.V. (Carso upstream oil & gas arm)Grupo Carso upstream subsidiary

Role: Grupo Carso upstream subsidiary (Carso's 'upstream investment arm'); acquired an additional 30.1% of Talos Energy Mexico 7 in Mar 2026

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Stakes

Talos Energy Inc. (via Control Empresarial de Capitales)TALO · 23.4% · as of Sep 2026 · $17.02 ▲ 2.78%

Ticker: TALO
Stake: 23.4% (39,079,036 shares); down from 24.5% at Mar 26, 2026
Stake as of: 2026-09-15

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PBF Energy Inc. Class A (via Control Empresarial)PBF · 14.3% · as of Jun 2026 · $71.90 ▲ 2.03%

Ticker: PBF
Stake: 14.3% (16,862,128 shares); down from 17.3% at Mar 24, 2026 (switched from 13D to passive 13G) and ~26.5% in Mar 2025
Stake as of: 2026-06-30

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Turkcell Iletisim Hizmetleri (ADSs, via Fundación Carlos Slim, Control Empresarial, Fundación Telmex, Inbursa)TKC · ~6.4% · as of Jun 2026 · $5.13 ▼ 0.58%

Ticker: TKC
Stake: ~6.4% aggregate (up from 5.1% at first 13G, event Mar 30, 2026)
Stake as of: 2026-06-30

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Zama oil field, Mexico (via Zamajal's 80% of Talos Energy Mexico 7, which holds 17.4% of Zama)Indirect; Talos Mexico holds… · as of Mar 2026

Stake: Indirect; Talos Mexico holds 17.4% of Zama
Stake as of: 2026-03-25

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BT Group (via América Móvil) (2024 reports)BT.A · ~3% · as of Sep 2024

Ticker: BT.A
Stake: ~3% June 2024, raised to 4.3% Sept 2024 (per Wikipedia summary of press)
Stake as of: 2024-09

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The New York Times Co. (former; held ~17% of Class A at peak, sold half in 2017)NYT · Former holder · $63.05 ▲ 1.87%

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Investment vehicles

Control Empresarial de Capitales, S.A. de C.V. (formerly Inversora Carso / Inmobiliaria Carso)holding co · CIK 0001273693

Type: holding co
Notes: Family holding company; all voting equity owned by a Mexican trust whose beneficiaries are the Slim Family. Holds Talos, PBF, Turkcell stakes; files Form 4s/13D/13G.

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Slim Family Mexican trust (Family Trust)trust

Type: trust
Notes: Owns all voting securities of Control Empresarial; holds 29.5% of América Móvil B shares (Mar 31, 2026).

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Zamajal, S.A. de C.V. / Mx Delta NRG 1holding co

Type: holding co
Notes: Carso upstream investment vehicle for non-operated Mexican oil stakes (Zama, Block 30/Kan).

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Private deals

Grupo Carso (via Zamajal subsidiary Mx Delta NRG 1) signed binding agreement to buy TotalEnergies' 30% non-operated…Jul 2026

In full: Grupo Carso (via Zamajal subsidiary Mx Delta NRG 1) signed binding agreement to buy TotalEnergies' 30% non-operated interest in Gulf of Mexico Block 30 (Kan discovery, est. 200-300 MMboe); Harbour Energy keeps 70% as operator; price undisclosed; subject to government approval
Date: 2026-07-16

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Zamajal bought an additional 30.1% of Talos Energy Mexico 7 (holder of 17.4% of the Zama field); Talos booked ~$49.7M…Mar 2026

In full: Zamajal bought an additional 30.1% of Talos Energy Mexico 7 (holder of 17.4% of the Zama field); Talos booked ~$49.7M proceeds in Q1 2026 (additional consideration reportedly contingent on first oil)
Date: 2026-03

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Talos Energy Q1 2026 10-Q: sale of part of its equity-method investment in Talos Energy Mexico 7 with $49.665M proceeds2026-Q1

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Grupo Carso signed ~$1.99B contract with Pemex to drill 32 wells at the Ixachi gas/condensate field (Veracruz) over…Sep 2025

In full: Grupo Carso signed ~$1.99B contract with Pemex to drill 32 wells at the Ixachi gas/condensate field (Veracruz) over three years; Pemex payments start Jan 2027 from hydrocarbon sales
Date: 2025-09-29

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Slim said Grupo Carso and América Móvil would invest US$5 billion in Mexico in 2026 under a 'more aggressive' planMay 2026

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Slim family/Control Empresarial took a stake in Turkcell ADSs (first 13G, event Mar 30, 2026; raised to ~6.4% by June…Mar 2026

In full: Slim family/Control Empresarial took a stake in Turkcell ADSs (first 13G, event Mar 30, 2026; raised to ~6.4% by June 30, 2026)
Date: 2026-03-30

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Real estate

Manhattan (Fifth Avenue), New York CityBeaux-Arts mansion (Duke-Semans mansion) · $44M · 2010 (old; listed for sale in 2015 at $80M)

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Somers, New YorkCorporate campus (former PepsiCo… · $87M · 2015 (old)

Type: Corporate campus (former PepsiCo Americas Beverages HQ)
Price: 87000000
Date: 2015 (old)

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Mexico City (Nuevo Polanco)Plaza Carso mixed-use complex (Carso… · developed 2010s

Type: Plaza Carso mixed-use complex (Carso HQ, Museo Soumaya, Inbursa Aquarium)
Date: developed 2010s
Via: Carso group companies

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Trophies

Museo Soumaya (Mexico City, opened 2011; run by Fundación Carlos Slim) housing Slim's art collection of ~66,000…

In full: Museo Soumaya (Mexico City, opened 2011; run by Fundación Carlos Slim) housing Slim's art collection of ~66,000 pieces, including one of the largest Rodin collections outside France

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Mexican soccer: 30% stakes in Pachuca and León clubs taken via América Móvil in 2012 (old; current status unverified)

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Legal & regulatory

Grupo Carso's Ixachi drilling contract makes it Pemex's most prominent private partner; Pemex pays from 2027 out of…

In full: Grupo Carso's Ixachi drilling contract makes it Pemex's most prominent private partner; Pemex pays from 2027 out of project hydrocarbon revenue (credit exposure to state-owned Pemex)

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Kan/Block 30 acquisition requires Mexican government approval

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Talos Energy cooperation (standstill-type) agreement with Control Empresarial extended on Dec 8, 2025 through Dec 16…

In full: Talos Energy cooperation (standstill-type) agreement with Control Empresarial extended on Dec 8, 2025 through Dec 16, 2026

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Telekom Austria control rests on a 10-year shareholder agreement with Austrian state holding ÖBAG (Feb 2023)

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Giving

Fundación Carlos Slim (est. 1986; also holds Turkcell ADSs ~2.7%)

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Fundación Telmex (est. 1995)

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Fundación del Centro Histórico de la Ciudad de México (chaired by Slim since 2001)

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Research gaps: WebSearch budget for the session was exhausted early in this person's research, so coverage relies on SEC EDGAR filings and a few fetched pages. Not verified: current Grupo Carso/Inbursa family % from BMV filings (Forbes 76% for Carso used), Mexican IFT/CRT regulatory status of América Móvil (preponderance, 2025 telecom law), current status of Pachuca/León stakes, BT Group stake after 2024, Minera Frisco/Grupo Sanborns/Sitios Latinoamérica stakes, recent real estate (only older reported properties listed). Zamajal ownership split reported differently (90/10 Carso/Control Empresarial per Talos 2023; Carso 80% per Mexico Business News). Mexican foundations have no US EIN. Wikipedia used as fallback for older facts.

Prices via Finnhub · as of Sep 24, 2026 4:00 PM ET. For information only.

What to watch

Mexican government approval and closing of Carso's purchase of TotalEnergies' 30% of Block 30 (Kan)

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Further Talos Energy share sales by Control Empresarial (stake cut to 23.4% by Sept 15, 2026) and fate of cooperation…Dec 16, 2026

In full: Further Talos Energy share sales by Control Empresarial (stake cut to 23.4% by Sept 15, 2026) and fate of cooperation agreement expiring Dec 16, 2026
When: 2026-12-16

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Continued PBF Energy selldown (26.5% in 2025 to 14.3% at June 30, 2026)

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Turkcell accumulation (5.1% to 6.4% in Q2 2026) - further 13G amendments

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Ixachi drilling progress ahead of Pemex payments starting January 2027 (Carso expects 12 of 32 wells producing by then)Jan 2027

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