Highstock Raises $30 Million to Buy Brands' Unsold Inventory

Highstock raised $30 million in a Series A led by Andreessen Horowitz, the firm said Sept. 11, with Greylock also participating. The round follows a $5.5 million seed raised in 2025, according to BeautyMatter, and neither announcement disclosed a valuation.

Highstock runs a marketplace that connects brands with excess or unsold inventory to vetted wholesale buyers, handling matching, logistics, compliance and payment so a brand does not have to route surplus goods through traditional liquidation channels. Chief executive Camille van Horne spent six years running Instacart's fulfillment operation before founding the company with chief technology officer Sean Cashin, also an Instacart alumnus, about a year before this round.

What Highstock has moved so far

The company said more than $1 billion of inventory has been listed on the platform and that it works with more than 100 major brands. About 60% of transaction volume comes from brands and conglomerates with over $500 million in annual revenue, concentrated for now in beauty and personal care, with apparel next. Roughly 40% of activity on the buying side comes from international buyers, live sellers and retailers.

Highstock, by the numbers	Figure
Inventory listed to date	$1 billion-plus
Major brand clients	100-plus
Volume from $500M+ revenue brands	60%
Product diverted from landfill	10 million-plus lbs

1. Seed, 20255.5 $ million
2. Series A, Sept. 202630 $ million

Source: Andreessen Horowitz and BeautyMatter, accessed 2026-09-15

BeautyMatter's reporting named one specific buyer on the platform: a Whatnot live-selling account called The Boyzzz, with nearly 170,000 followers and more than 145,000 sales run through Highstock. That is one data point on the demand side, not proof the $1 billion in listed inventory has actually sold, a distinction neither announcement addressed.

Who is backing it, and why that matters for the pitch

A16z partner Olivia Moore is joining Highstock's board, and Jeff Jordan, the firm's general partner and a former eBay and OpenTable executive, is joining as an advisor. In the firm's own investment post, its partners described the problem Highstock is chasing this way: "Excess inventory is the opposite of a clean commodity: it's messy, heterogeneous, one-off lots with no comps." That is the pitch for why a software marketplace, rather than a liquidator, should own the category.

Highstock's math is not unlike the reasoning behind HiddenLayer's most recent round, another Series raised this month without a public valuation attached, or Euclyd's decision to more than double its own funding target rather than take the number it first asked for. In each case, the company let the metrics carry the story and left the price out of the announcement. For Highstock, the metric it chose is $1 billion in listed inventory. What is missing is how much of that inventory actually cleared, and at what price.