Mutual Fund RTAs (Backend): CAMS (NSE: CAMS) KFintech (NSE: KFINTECH). Every time money flows into a mutual fund via SIPs, one of these two companies takes a cut.
โCredit Rating Agencies: CRISIL (NSE: CRISIL) ICRA (NSE: ICRA). The corporate debt market cannot function without their stamps of approval.
โAuto Batteries & EV Storage: Exide Industries (NSE: EXIDEIND) Amara Raja (NSE: ARE&M). The legacy ICE battery duopoly that is now transitioning into the Lithium-ion gigafactory duopoly.
โFood Tech & Quick Commerce: Zomato (NSE: ZOMATO) Swiggy (NSE: SWIGGY). The two cash-burning startups have now matured into listed, consolidated giants controlling the entire on-demand delivery ecosystem.
Power Exchanges: IEX (NSE: IEX) PXIL (Unlisted). IEX holds a massive market share (often 85% ) in the short-term power trading market. If you want a proxy on India's power financialization, IEX is the listed toll-booth.
โDepositories: CDSL (NSE: CDSL) NSDL. While NSDL handles a massive chunk of institutional wealth, CDSL is the undisputed king of retail demat accounts and is readily available on the exchange.
โAviation: IndiGo (NSE: INDIGO) Air India (Unlisted). With Air India consolidated under the Tata Group and unlisted, InterGlobe Aviation (IndiGo) is the only listed pure-play airline capable of capturing the duopoly premium.
โTelecom: Bharti Airtel (NSE: BHARTIARTL) Reliance Jio (Unlisted as a standalone). While you can buy Jio indirectly through Reliance Industries, Bharti Airtel is the direct, pure-play listed entity dominating the telecom duopoly alongside it.
Mazagon Dock Shipbuilders (NSE: MAZDOCK) Cochin Shipyard (NSE: COCHINSHIP). When the Indian Navy needs to build submarines, destroyers, or next-generation aircraft carriers, the order book inevitably flows to these two state-backed giants. The infrastructure, dry docks, and security clearances required to build a warship create an impenetrable barrier to entry for new private players.
Asian Paints (NSE: ASIANPAINT) Berger Paints (NSE: BERGEPAINT). Historically, these two have controlled the vast majority of the Indian decorative paint market. Their moat isn't the paint itself; it is the tinting machines placed in tens of thousands of hardware stores across the country, creating a massive distribution lock-in. (Note: This duopoly premium is currently being stress-tested by Grasim's aggressive entry with Birla Opus).
VIP Industries (NSE: VIPIND) Safari Industries (NSE: SAFARI). If you exclude the unlisted Samsonite (which owns American Tourister), the listed Indian luggage market is a straight shootout between VIP and Safari. As the Indian middle class travels more and shifts from unorganized local brands to branded hard-luggage, these two capture almost the entire listed market share.