Highstock

Identity resolution / disambiguation: The domain highstock.com belongs to a New York- and Gurgaon (India)-based B2B inventory marketplace startup called Highstock, Inc., founded in 2024 by Camille van Horne and Ashish Sinha. This is entirely unrelated to Highsoft's 'Highstock' JavaScript stock-charting library (part of the Highcharts product family, highcharts.com/highstock), which is a Norwegian software product, not a company, and has no connection to Greylock Partners. This was verified directly: (1) Greylock's own portfolio page at greylock.com/portfolio/ lists a company named 'Highstock' with the tagline 'Your partner in global distribution,' linking to greylock.com/portfolio/highstock/; (2) highstock.com itself redirects to www.highstock.com, a live marketing site describing 'Highstock: Turn unsold inventory into a global opportunity — The private AI native marketplace for vetted global business buyers and coveted brands,' with US and India offices; (3) independent press (Fortune, citybiz, Beauty Independent) all describe the same New York-based inventory-liquidation marketplace startup led by Camille van Horne and Ashish Sinha. There is no ambiguity: this is the Greylock portfolio company, and it is unrelated to the charting library.

Founding story: Highstock was co-founded in 2024 (the company was described as 'six-month-old' in a Fortune article dated February 27, 2025, implying formation around mid-to-late 2024) by Camille van Horne and Ashish Sinha, both alumni of Instacart. Van Horne was Instacart's Director of Product Management, where she led the end-to-end fulfillment experience connecting shoppers to customers and, through warehouse visits with thousands of CPG brands and retailers, repeatedly observed high-quality unsold products being sent to landfill or incineration. Earlier in her career she worked at Sears and Kmart (where she first became interested in the closeout/off-price goods market) and earned an MBA at Stanford. Sinha, an engineer by training, worked as an engineer at Instacart alongside van Horne. He grew up in a manufacturing/shoe-business family in India; during India's roughly six-month COVID-19 lockdown, buyers who had previously purchased his family's inventory at wholesale prices used their leverage to buy the same goods at near-liquidation prices, an experience that shaped his interest in bringing transparency and technology to opaque global wholesale/liquidation trade.

Product and business model: Highstock built a private, closed-network marketplace where brands list surplus, close-dated, or otherwise 'unsold' inventory; a vetted network of international wholesale buyers (described by Fortune as functioning like 'an eBay for big brands with excess inventory') places bids; brands can accept, reject, or counter; and Highstock manages logistics, compliance, payments, and (per company statements) same-day payment protection for sellers. The company started in the beauty and personal-care vertical — citing that only about half of beauty/personal-care product made in a given year is sold within that year, and roughly 10% is incinerated, representing an estimated $50B in wasted value annually in that category alone (figures given by CEO van Horne to Beauty Independent) — with stated plans to expand into other categories including apparel. Highstock states it charges no listing fee to brand sellers and instead takes roughly a 10% commission on accepted-offer value from buyers without an existing relationship to the brand.

Business model

B2B marketplace / matchmaking platform connecting brands with excess inventory to vetted wholesale buyers worldwide; Highstock does not set prices but facilitates bidding, negotiation, payments, and logistics between the two sides.

Transaction-based commission: no listing fee for brands; Highstock states it charges buyers roughly 10% of the accepted offer value when the buyer does not already have an existing relationship with the brand seller.