LP Interests as the Atomic Unit
Sydecar and the new atomic unit of the private markets
The key constraint on AngelList is that it wins by being close to founders, so it cannot push secondary liquidity as aggressively as infrastructure players that sit one layer above the company. Its marketplace brings together founders, managers, and LPs, but that also means product changes around transfers, pricing, and access need company comfort. SPV infrastructure providers can standardize the vehicle itself and make trading the LP interest the main event, instead of negotiating each step with the issuer.
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AngelList’s core wedge is distribution. It helps managers find LP capital, but that marketplace model makes many managers build on rented ground. Managers with their own LP relationships often prefer standalone SPVs so they keep the investor relationship, brand, and workflow off a shared network.
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Carta has a similar constraint from the other side. Because Carta controls the cap table system of record, it can improve execution only with issuer partnership. That is why Carta expanded into SPV formation through Vauban, giving it exposure to the vehicle layer where transfers can happen with less company involvement.
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The product difference is concrete. On AngelList and CartaX, liquidity is still tied to company approval and issuer process. In a standardized SPV model, the company sees one line on the cap table, while LP interests inside that vehicle can be reassigned on a ledger, which is simpler to automate and settle.
The market is heading toward a split between marketplaces that source deals and infrastructure that powers portable SPVs across many channels. If LP interests become the tradable unit, the advantage will shift to the platforms that own the ledger, legal standard, and transfer workflow for the vehicle itself, not the platforms that depend on each company saying yes every time.