CartaX Replaces Broker-Led Secondaries
James McGillicuddy, head of strategy at Carta, on building an issuer-centric platform and investing in secondaries
This reveals that CartaX was designed to replace the classic broker as the center of a private secondary trade, and move decision making to the actual buyer and the issuing company. Instead of a broker shopping stock around for a fee, Carta wanted funds to open brokerage accounts, review company disclosures, meet management, and buy for their own balance sheet, with the issuer controlling access and timing.
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The practical difference is principal versus agency. On CartaX, participants had to take principal risk, meaning they were buying shares for their own fund, not acting as a middleman matching a seller and a buyer for commission. Brokers could still participate, but only by bringing their own capital or trading through a fund they controlled.
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Carta thought the old broker led market existed mainly because private secondaries were opaque. Brokers won by controlling attention and information. CartaX tried to make that less necessary by giving portfolio managers cap table data, share count, preference stack, company history, and direct management access inside an issuer approved process.
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This fit the broader issuer centric thesis. Private companies care less about maximum trading volume than about keeping control of who gets onto the cap table, when liquidity happens, and what information is shared. That is why Carta positioned recurring auctions more like controlled liquidity windows than an always open marketplace like Forge or a public exchange.
The direction of travel is toward software turning private secondaries from a relationship business into a workflow product. The winners will be platforms that let issuers run clean, repeatable liquidity events, while investors adapt by building direct buying muscles and reserving capital for recurring auctions instead of relying on brokered one off deals.