Mapping Market Power: Key Monopolies, Duopolies, and Oligopolies

This overview categorizes major companies by market power: monopolies dominate niche sectors, duopolies share control between two leaders, and oligopolies consist of a few key players shaping entire industries.

It highlights how market structure drives pricing, retention, and competitive advantage.

🏰 Monopolies

$Taiwan Semiconductor Manufacturing(TSM)$ - advance semi fab

$ASML Holding NV(ASML)$ – EUV lithography

$VeriSign(VRSN)$ - domain name registry

$Fair Isaac(FICO)$ – credit scores

$Intuit(INTU)$ – tax preparation software

$Thermo Fisher Scientific(TMO)$ – ultra-high-end mass spec

$Illumina(ILMN)$ – high-throughput DNA sequencing

$Costar Technologies, Inc.(CSTI)$ – U.S. commercial real estate data

$Sherwin-Williams(SHW)$ – architectural paint distribution (U.S.)

⚔️ Duopolies

$Visa(V)$ & $MasterCard(MA)$ – credit cards

$Airbus SE(EADSY)$ & $Boeing(BA)$ – aircraft

$Pepsi(PEP)$ & $Coca-Cola(KO)$ – drinks

$Advanced Micro Devices(AMD)$ & $NVIDIA(NVDA)$ – GPU chips

$Apple(AAPL)$ & $Samsung Electronics Co., Ltd.(SSNNF)$ – smartphones

$Cadence Design(CDNS)$ & $Synopsys(SNPS)$ - chip design software

$IDEXX Laboratories(IDXX)$ & $Zoetis(ZTS)$ - veterinary diagnostics

$Novo-Nordisk A/S(NVO)$ & $Eli Lilly(LLY)$ - weight loss drugs

$Intercontinental Exchange(ICE)$ & $NASDAQ(.IXIC)$ ICE / Nasdaq - US stock exchanges

🧱 Oligopolies

$Alphabet(GOOG)$ $Microsoft(MSFT)$ $Amazon.com(AMZN)$ – cloud infrastructure

$Fortinet(FTNT)$ $CrowdStrike Holdings, Inc.(CRWD)$ $Palo Alto Networks(PANW)$ - cybersecurity

$AT&T Inc(T)$ $Verizon(VZ)$ $T-Mobile US(TMUS)$ – U.S. telecom

$Exxon Mobil(XOM)$ / $Chevron(CVX)$ / $BP PLC(BP)$ / $SHELL PLC SPON ADS EACH REPR 2 ORD SHS(SHEL)$ – oil & gas majors

$JPMorgan Chase(JPM)$ $Bank of America(BAC)$ $Citigroup(C)$ $Wells Fargo(WFC)$ – U.S. big banks

$Meta Platforms, Inc.(META)$ $Alphabet(GOOG)$ $Snap Inc(SNAP)$TikTok– social media platforms

$Automatic Data Processing Inc(ADP)$ $Paychex(PAYX)$ $Paycom(PAYC)$ $Workday(WDAY)$ – payroll and HR software

$Carrier Global Corporation(CARR)$ / $Trane Technologies PLC(TT)$ / $Johnson Controls(JCI)$ / $Comfort Systems USA(FIX)$ – HVAC and building systems

$Moody's(MCO)$ / $S&P 500(.SPX)$ / $Abercrombie & Fitch(ANF)$ - credit rating

$Equifax(EFX)$ / $Experian plc(EXPGF)$ / $TransUnion(TRU)$ - credit data

$Air Products & Chemicals(APD)$ / $Linde PLC(LIN)$ / $L'Air Liquide SA(AIQUF)$ - industrial gas

$Booking Holdings(BKNG)$ / $Expedia(EXPE)$ / $Airbnb, Inc.(ABNB)$ - travel

$Heico(HEI)$ / $TransDigm(TDG)$ - aircraft components

What would you add?

ou can search by monopoly, duopoly and oligopoly in my Global Conpounders Database.

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