Highstock, a New York City-based AI-native B2B marketplace, raised $30 million in Series A funding from Andreessen Horowitz (a16z). Founded and led by CEO Camille van Horne, with Sean Cashin as CTO, Highstock enables brands to discreetly sell unsold inventory to vetted global wholesale buyers, handling fulfillment end to end; the company launched in beauty and is now expanding into apparel. FUN FACT: CEO Camille van Horne spent six years running Instacart’s end-to-end fulfillment, and teamed up with fellow Instacart alum Sean Cashin (CTO) to build a brand-safe way to move excess inventory. In just over a year, they’ve listed more than $1B in inventory, signed 100+ major brands, and kept 10M+ pounds of product out of landfills. Live sellers who used to source inventory through archaic WhatsApp threads now order on the platform daily. FOUNDERS: Camille van Horne & Sean Cashin INVESTORS: Andreessen Horowitz AMOUNT: $30,000,000 HQ: New York City, New York #VentureCapital# #Highstock# #TradedPartner# #CamillevanHorne# #TradedVC#

Announcing @a16z's investment in Highstock. Excess inventory is a massive and expensive problem for consumer brands. Highstock is an AI-powered marketplace that helps brands find new channels for surplus inventory - while reducing waste.

@a16z @highstock_x @camillevanhorne Beauty has been their beachhead category, but this problem spans all of consumer goods. They just launched apparel and are quickly growing both the business and the team. Brands with excess or buyers seeking supply - check out And, they're hiring!

Beyond excited to share that @highstock_x has raised a $30M Series A led by @a16z with participation from @GreylockVC, @AbstractVC, @Daybreak_Fund, and angels. We are doubling down on our mission of creating value for brands with unproductive inventory. With this raise, we are expanding our team and building on our success in beauty to unlock a new category: apparel. @omooretweets, @venturetwins and @jeff_jordan are the right partners to take this company to new heights - they've invested in great marketplaces like Instacart (I may be biased :) ), and have studied how AI will scale marketplace models that were previously too labor intensive to be financially viable. Thank you to our angels: @Max, @lennysan, JJ Zhuang (Instacart) and John Adams (Instacart). Most of all, thank you to our customers and team. We would not be here without you. Read my reflections on our journey below.

Highstock is founded by @camillevanhorne and Ashish Sinha, who were pivotal builders during Instacart's earliest days. They saw the need to revolutionize this problem in commerce and applied their deep experience building marketplaces at scale.