---
title: "Keystone Acquisition Corp. Announces Closing of $28,750,000 Million Initial Public Offering Including Exercise of Underwriters’ Over-Allotment Option"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/288764042.md"
description: "Keystone Acquisition Corp. announced the closing of its $287.5 million initial public offering, including the exercise of the underwriters' over-allotment option. The company sold 28,750,000 units at $10.00 per unit on Nasdaq under ticker 'KEYYU'. Concurrently, it closed a private placement of 8,468,750 warrants for $8.47 million. Gross proceeds from both transactions include $28.82 million placed in trust. Keystone is a blank check company focusing on US industrial innovation sectors."
datetime: "2026-06-04T19:17:10.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/288764042.md)
  - [en](https://longbridge.com/en/news/288764042.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/288764042.md)
---

# Keystone Acquisition Corp. Announces Closing of $28,750,000 Million Initial Public Offering Including Exercise of Underwriters’ Over-Allotment Option

In New York City, on June 04, 2026, Keystone Acquisition Corp. (Nasdaq: KEYYU) disclosed the completion of its initial public offering of 28,750,000 units, including 3,750,000 units from the underwriters' over-allotment option. The units were priced at $10.00 each and comprise one Class A ordinary share and half of one redeemable warrant. Each full warrant allows the purchase of one Class A ordinary share at $11.50 per share.

### Related Stocks

- [KEYYU.US](https://longbridge.com/en/quote/KEYYU.US.md)

## Related News & Research

- [Keystone Acquisition Q2 net income rises to $74,031; 6-month net income climbs to $36,791](https://longbridge.com/en/news/295843286.md)
- [Blue Owl Capital Completes $750 Million 6.750% Senior Notes Due 2036 With Guarantees](https://longbridge.com/en/news/296272373.md)
- [Gray Announces Private Offering of Senior Secured First Lien Notes | GTN Stock News](https://longbridge.com/en/news/296110823.md)
- [Vivani Medical posts slide presentation under Reg FD; Exhibit 99.1 attached](https://longbridge.com/en/news/296102770.md)
- [Bluejay Diagnostics says SYMON-II pivotal study completes enrollment of 750 patients for Symphony IL-6 test](https://longbridge.com/en/news/295778817.md)