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Exclusive: Two Instacart alumni raise $5.5 million to build Highstock, an eBay for big brands with excess inventory

By
Emma Hinchliffe
Emma Hinchliffe
and
Nina Ajemian
Nina Ajemian
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By
Emma Hinchliffe
Emma Hinchliffe
and
Nina Ajemian
Nina Ajemian
Down Arrow Button Icon
February 27, 2025, 8:42 AM ET
Camille van Horne and Ashish Sinha
Camille van Horne and Ashish Sinha, cofounders of Highstock. Alexandra Genova—Highstock

Good morning! Ellevest exits its automated investing business, Mira Murati’s new startup is reportedly hitting a $9 billion valuation, and two Instacart alumni tackle liquidation inventory.

– Shopping for a deal. During her time as director of product management at Instacart, Camille van Horne mastered moving inventory from point A to point B. Last year, she and her Instacart engineering colleague Ashish Sinha left the grocery business to move product on a larger scale—around the world.

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The duo are the cofounders of Highstock, a six-month-old platform that facilitates transactions between brands selling off excess inventory and discount buyers across the globe. The startup with a team of six has raised $5.5 million from lead investor Greylock and Instacart cofounder Max Mullen, Fortune is the first to report.

Rather than dilute brand value by flooding U.S.-based TJ Maxx or Ross locations with little control over how product is presented, brands can use Highstock to reach customers in new-to-them markets, including India, the Middle East, Canada, and Mexico. Highstock has started with the personal care category—the founders wanted to begin with a category that involved expiration dates, like their experience with food at Instacart—but plans to expand to others, including apparel.

Camille van Horne and Ashish Sinha, cofounders of Highstock.
Alexandra Genova—Highstock

Its platform operates as a kind of eBay for discount inventory. Buyers place bids for shipments of inventory, and brands can accept, reject, or counteroffer. Highstock isn’t involved in setting the price, but the two parties use its software to pay and book shipments. Highstock’s tech-driven approach offers a new level of transparency in a traditionally opaque industry dominated by brokers—one that Sinha understood early thanks to his family’s manufacturing business in India. “You see thousands of brokers, and it’s a very opaque process that you cannot trust,” he says.

It’s still a secretive sector—brands are reluctant to let it be known widely that they have excess inventory to sell, while buyers don’t want their customers to know they’re stocking inventory at a discount. But Highstock confirms that there are 50 brands currently using its platform, totaling $100 million of product. The typical transaction is $20,000. About 50% of its transactions are with buyers outside the U.S. who include Canada’s Fragrance Depot and the U.K.’s allbeauty.com; skincare brand Goldfaden MD has sold product via Highstock. Thirty percent of brands using the platform have more than $50 million in annual revenue.

It’s a complex business that is only becoming more so—with expected U.S. and retaliatory tariffs. “Any type of disruption to manufacturing or trade means that product will not be where it is supposed to be,” van Horne says, “and that chaos is actually an area that Highstock can perform in because we have the agility and ability to move product in opportunistic fashions to good buyers.”

Van Horne, the company’s CEO, sees Highstock as a way to help brands retain brand value and reach new customers; to help retailers access new inventory; and to reduce waste. Customers might notice its impact the next time they snag a deal.

Emma Hinchliffe
emma.hinchliffe@fortune.com

The Most Powerful Women Daily newsletter is Fortune’s daily briefing for and about the women leading the business world. Today’s edition was curated by Nina Ajemian. Subscribe here.

ALSO IN THE HEADLINES

- Ellevest exits. Financial services company Betterment is acquiring the automated investing business of Sallie Krawcheck’s female-focused investment platform Ellevest. Krawcheck, Ellevest's founder, shared that she was stepping down as CEO in December 2024 following a health diagnosis; Sylvia Kwan and Connie Hsiung now lead the business. Barron’s

- One in a billion. Thinking Machines Lab, former OpenAI CTO Mira Murati’s recently debuted startup, is reportedly looking to raise $1 billion at a $9 billion valuation. Murati’s spokesperson declined to comment. Business Insider

- Show yourself. Amy Gleason was revealed to be the lead administrator of President Donald Trump’s Department of Government Efficiency, or DOGE. Previously, White House press secretary Karoline Leavitt said that Elon Musk was leading the group. CNBC

- For and against. In DEI news, John Deere investors voted against an anti-DEI resolution. Meanwhile, BlackRock became yet another firm to remove references to DEI from its annual report.

MOVERS AND SHAKERS

Marguerite Mariscal, cofounder of Momofuku Goods, is stepping down as CEO of the sauces, seasonings, and other pantry goods company. She is joining the company’s board of directors and staying on as CEO of Momofuku restaurants.

Winky Lux, a beauty brand, appointed Lauren Bloomer as CEO. Previously, she was president of the Good Glamm Group.

The Virgil Abloh Foundation named Dana Loatman executive director. Loatman most recently served as chief of staff of external affairs for the Obama Foundation.

Nav, a financial platform for small businesses, named Raquel Alexander CMO. She is an advisor at Midi Health and was previously VP of marketing and growth at TextNow.

Camden National Corporation, Camden National Bank’s holding company, appointed Raina L. Maxwell to the board of directors for both the holding company and the bank. Maxwell is VP of customer satisfaction at L.L. Bean.

ON MY RADAR

Women watching women watching women New York Times

A victim of harassment chronicles the effects of online abuse Washington Post

How South African sensation Tyla brought the world to its feet Vogue

PARTING WORDS

“It was really validating to have a quote-unquote ‘hit’ again; to have everyone talking about me. But at the same time, it’s so fickle, so you can't put too much on those moments.”

— Singer Tinashe on opportunities and success after her song “Nasty”

This is the web version of MPW Daily, a daily newsletter for and about the world’s most powerful women. Sign up to get it delivered free to your inbox.
About the Authors
Emma Hinchliffe
By Emma HinchliffeMost Powerful Women Editor
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Emma Hinchliffe is Fortune’s Most Powerful Women editor, overseeing editorial for the longstanding franchise. As a senior writer at Fortune, Emma has covered women in business and gender-lens news across business, politics, and culture. She is the lead author of the Most Powerful Women Daily newsletter (formerly the Broadsheet), Fortune’s daily missive for and about the women leading the business world.

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By Nina AjemianNewsletter Curation Fellow

Nina Ajemian is the newsletter curation fellow at Fortune and works on the Term Sheet and MPW Daily newsletters.

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