---
title: "Keystone Acquisition completes $287.5M IPO, places $288.2M in trust; 22.84M warrants outstanding"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/289367587.md"
description: "Keystone Acquisition completed its $287.5M IPO, selling 28.75 million units at $10 each. Proceeds of $288.2M were placed in a U.S. trust account. The company also sold 8.47 million private warrants for $8.5M. As of June 4, 2026, total assets stood at $290.2M, with over 22.8 million warrants outstanding."
datetime: "2026-06-10T19:13:01.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/289367587.md)
  - [en](https://longbridge.com/en/news/289367587.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/289367587.md)
generator: "portal-rs"
---

# Keystone Acquisition completes $287.5M IPO, places $288.2M in trust; 22.84M warrants outstanding

**Keystone Acquisition completed a 28.75M-unit IPO raising $287.5M and placed $288,218,750 in a U.S. trust account.**

**Key Highlights:**

-   Sold 28,750,000 units at $10.00 each, including 3,750,000 overallotment units, generating $287,500,000 gross proceeds.
-   Completed private sale of 8,468,750 warrants at $1.00 each, adding $8,468,750; Sponsor bought 5,593,750.
-   $288,218,750 of IPO and private placement proceeds (including up to $11.5M deferred commission) placed in U.S. trust.
-   Audited balance sheet as of June 4, 2026 shows total assets $290,246,800 and cash in trust $288,218,750.
-   22,843,750 warrants outstanding (14,375,000 public; 8,468,750 private); public warrants exercisable at $11.50 post-business combination.

Original SEC Filing: Keystone Acquisition Corp. \[ KEYYU \] - 8-K - Jun. 10, 2026

**Disclaimer**

This is an AI-powered summary. It may contain inaccuracies. Consider verifying important information with the source. Please note this summary is solely based on documents filed with the SEC.

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> **Disclaimer: This article is for reference only and does not constitute any investment advice.**