# Highstock

> AI-native B2B marketplace that matches consumer brands’ excess inventory to vetted wholesale buyers without a public fire sale.

## Why it is interesting

a16z led a $30M Series A on September 10, 2026 after listed inventory rose from $100M at a February 2025 Greylock seed to $1B+. Valuation, GMV, and take rate were not disclosed — the diligence question is sell-through, not the list.

## Profile

- **Latest funding:** Series A — $30M (September 2026)
- **Latest known valuation:** Not publicly disclosed
- **Total disclosed equity funding:** $36M
- **Stage:** series-a
- **Status:** private
- **Industries:** consumer, marketplace
- **Coverage:** full
- **Last updated:** 2026-09-10
- **Latest funding investors:** Andreessen Horowitz

## Key facts

- Series A (Sep 10, 2026): $30M led by a16z; Olivia Moore joining the board; Jeff Jordan advising — valuation not disclosed (/2026-highstock-30m-series-a-a16z)
- Seed (Feb 27, 2025): $5.5M led by Greylock (/fund/greylock-partners); Instacart cofounder Max Mullen participated (Fortune)
- Listed inventory: $100M at seed (Fortune) → $1B+ at Series A (a16z / company site) — listed, not GMV
- a16z: 100+ major brands; ~60% of volume from brands/conglomerates with >$500M annual revenue
- Company site: 10M+ pounds of product claimed diverted from landfill; NYC HQ at 734 Broadway plus a Gurugram office

## Funding history

- Series A · $30M · September 2026
  Source: https://a16z.com/announcement/investing-in-highstock/
- Seed · $5.5M · February 2025
  Source: https://fortune.com/2025/02/27/exclusive-two-instacart-alumni-raise-5-5-million-to-build-highstock-an-ebay-for-big-brands-with-excess-inventory/

## Investors in our directory

- https://venturecapitaltracker.com/fund/andreessen-horowitz
- https://venturecapitaltracker.com/fund/greylock-partners

## Related articles

- https://venturecapitaltracker.com/2026-highstock-30m-series-a-a16z
- https://venturecapitaltracker.com/2026-september-vc-news
- https://venturecapitaltracker.com/nyc-marketplaces-etsy-resyhello-vertical-winners

**By:** [Venture Capital Tracker](https://venturecapitaltracker.com/editorial-policy)
**Last updated:** September 10, 2026

**Editorial note:** AI tools assisted with research, structure, or drafting. Venture Capital Tracker retains human editorial responsibility for factual accuracy, relevance, and source quality before publication.

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Source: https://venturecapitaltracker.com/startup/highstock