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   <title>Keystone Acquisition closes $287.5 million IPO with over-allotment option</title>
   <link>http://www.streetinsider.com/IPOs/Keystone+Acquisition+closes+%24287.5+million+IPO+with+over-allotment+option/26607330.html</link>
   <description>

&lt;p&gt;Keystone Acquisition Corp. (NASDAQ: KEYYU) completed its initial public offering of 28.75 million units at $10.025 per unit, including 3.75 million units from the underwriters' over-allotment option exercise, the company announced.&lt;/p&gt;

&lt;p&gt;Each unit consists of one Class A ordinary share and half of one redeemable warrant. The warrants are exercisable at $11.50 per share. The units began trading on Nasdaq under ticker symbol &quot;KEYYU&quot; on June 3, 2026.&lt;/p&gt;

&lt;p&gt;The company simultaneously completed a private placement of 8,468,750 warrants at $1.00 per warrant, generating $8.47 million in gross proceeds. Keystone International Acquisition Management LLC, the company's sponsor, purchased 5,593,750 private placement warrants, while</description>
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   <title>Keystone Acquisition closes $287.5 million IPO with over-allotment option</title>
   <link>http://www.streetinsider.com/IPOs/Keystone+Acquisition+closes+%24287.5+million+IPO+with+over-allotment+option/26607330.html</link>
   <description>

&lt;p&gt;Keystone Acquisition Corp. (NASDAQ: KEYYU) completed its initial public offering of 28.75 million units at $10.025 per unit, including 3.75 million units from the underwriters' over-allotment option exercise, the company announced.&lt;/p&gt;

&lt;p&gt;Each unit consists of one Class A ordinary share and half of one redeemable warrant. The warrants are exercisable at $11.50 per share. The units began trading on Nasdaq under ticker symbol &quot;KEYYU&quot; on June 3, 2026.&lt;/p&gt;

&lt;p&gt;The company simultaneously completed a private placement of 8,468,750 warrants at $1.00 per warrant, generating $8.47 million in gross proceeds. Keystone International Acquisition Management LLC, the company's sponsor, purchased 5,593,750 private placement warrants, while</description>
   <guid isPermaLink="true">http://www.streetinsider.com/IPOs/Keystone+Acquisition+closes+%24287.5+million+IPO+with+over-allotment+option/26607330.html</guid>
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   <title>Keystone Acquisition closes $287.5 million IPO with over-allotment option</title>
   <link>http://www.streetinsider.com/IPOs/Keystone+Acquisition+closes+%24287.5+million+IPO+with+over-allotment+option/26607330.html</link>
   <description>

&lt;p&gt;Keystone Acquisition Corp. (NASDAQ: KEYYU) completed its initial public offering of 28.75 million units at $10.025 per unit, including 3.75 million units from the underwriters' over-allotment option exercise, the company announced.&lt;/p&gt;

&lt;p&gt;Each unit consists of one Class A ordinary share and half of one redeemable warrant. The warrants are exercisable at $11.50 per share. The units began trading on Nasdaq under ticker symbol &quot;KEYYU&quot; on June 3, 2026.&lt;/p&gt;

&lt;p&gt;The company simultaneously completed a private placement of 8,468,750 warrants at $1.00 per warrant, generating $8.47 million in gross proceeds. Keystone International Acquisition Management LLC, the company's sponsor, purchased 5,593,750 private placement warrants, while</description>
   <guid isPermaLink="true">http://www.streetinsider.com/IPOs/Keystone+Acquisition+closes+%24287.5+million+IPO+with+over-allotment+option/26607330.html</guid>
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   <title>Keystone Acquisition closes $287.5 million IPO with over-allotment option</title>
   <link>http://www.streetinsider.com/IPOs/Keystone+Acquisition+closes+%24287.5+million+IPO+with+over-allotment+option/26607330.html</link>
   <description>

&lt;p&gt;Keystone Acquisition Corp. (NASDAQ: KEYYU) completed its initial public offering of 28.75 million units at $10.025 per unit, including 3.75 million units from the underwriters' over-allotment option exercise, the company announced.&lt;/p&gt;

&lt;p&gt;Each unit consists of one Class A ordinary share and half of one redeemable warrant. The warrants are exercisable at $11.50 per share. The units began trading on Nasdaq under ticker symbol &quot;KEYYU&quot; on June 3, 2026.&lt;/p&gt;

&lt;p&gt;The company simultaneously completed a private placement of 8,468,750 warrants at $1.00 per warrant, generating $8.47 million in gross proceeds. Keystone International Acquisition Management LLC, the company's sponsor, purchased 5,593,750 private placement warrants, while</description>
   <guid isPermaLink="true">http://www.streetinsider.com/IPOs/Keystone+Acquisition+closes+%24287.5+million+IPO+with+over-allotment+option/26607330.html</guid>
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   <title>Keystone Acquisition closes $287.5 million IPO with over-allotment option</title>
   <link>http://www.streetinsider.com/IPOs/Keystone+Acquisition+closes+%24287.5+million+IPO+with+over-allotment+option/26607330.html</link>
   <description>

&lt;p&gt;Keystone Acquisition Corp. (NASDAQ: KEYYU) completed its initial public offering of 28.75 million units at $10.025 per unit, including 3.75 million units from the underwriters' over-allotment option exercise, the company announced.&lt;/p&gt;

&lt;p&gt;Each unit consists of one Class A ordinary share and half of one redeemable warrant. The warrants are exercisable at $11.50 per share. The units began trading on Nasdaq under ticker symbol &quot;KEYYU&quot; on June 3, 2026.&lt;/p&gt;

&lt;p&gt;The company simultaneously completed a private placement of 8,468,750 warrants at $1.00 per warrant, generating $8.47 million in gross proceeds. Keystone International Acquisition Management LLC, the company's sponsor, purchased 5,593,750 private placement warrants, while</description>
   <guid isPermaLink="true">http://www.streetinsider.com/IPOs/Keystone+Acquisition+closes+%24287.5+million+IPO+with+over-allotment+option/26607330.html</guid>
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   <title>Keystone Acquisition closes $287.5 million IPO with over-allotment option</title>
   <link>http://www.streetinsider.com/Equity+Offerings/Keystone+Acquisition+closes+%24287.5+million+IPO+with+over-allotment+option/26607330.html</link>
   <description>

&lt;p&gt;Keystone Acquisition Corp. (NASDAQ: KEYYU) completed its initial public offering of 28.75 million units at $10.025 per unit, including 3.75 million units from the underwriters' over-allotment option exercise, the company announced.&lt;/p&gt;

&lt;p&gt;Each unit consists of one Class A ordinary share and half of one redeemable warrant. The warrants are exercisable at $11.50 per share. The units began trading on Nasdaq under ticker symbol &quot;KEYYU&quot; on June 3, 2026.&lt;/p&gt;

&lt;p&gt;The company simultaneously completed a private placement of 8,468,750 warrants at $1.00 per warrant, generating $8.47 million in gross proceeds. Keystone International Acquisition Management LLC, the company's sponsor, purchased 5,593,750 private placement warrants, while</description>
   <guid isPermaLink="true">http://www.streetinsider.com/Equity+Offerings/Keystone+Acquisition+closes+%24287.5+million+IPO+with+over-allotment+option/26607330.html</guid>
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   <title>Keystone Acquisition closes $287.5 million IPO with over-allotment option</title>
   <link>http://www.streetinsider.com/Equity+Offerings/Keystone+Acquisition+closes+%24287.5+million+IPO+with+over-allotment+option/26607330.html</link>
   <description>

&lt;p&gt;Keystone Acquisition Corp. (NASDAQ: KEYYU) completed its initial public offering of 28.75 million units at $10.025 per unit, including 3.75 million units from the underwriters' over-allotment option exercise, the company announced.&lt;/p&gt;

&lt;p&gt;Each unit consists of one Class A ordinary share and half of one redeemable warrant. The warrants are exercisable at $11.50 per share. The units began trading on Nasdaq under ticker symbol &quot;KEYYU&quot; on June 3, 2026.&lt;/p&gt;

&lt;p&gt;The company simultaneously completed a private placement of 8,468,750 warrants at $1.00 per warrant, generating $8.47 million in gross proceeds. Keystone International Acquisition Management LLC, the company's sponsor, purchased 5,593,750 private placement warrants, while</description>
   <guid isPermaLink="true">http://www.streetinsider.com/Equity+Offerings/Keystone+Acquisition+closes+%24287.5+million+IPO+with+over-allotment+option/26607330.html</guid>
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   <title>Keystone Acquisition closes $287.5 million IPO with over-allotment option</title>
   <link>http://www.streetinsider.com/Equity+Offerings/Keystone+Acquisition+closes+%24287.5+million+IPO+with+over-allotment+option/26607330.html</link>
   <description>

&lt;p&gt;Keystone Acquisition Corp. (NASDAQ: KEYYU) completed its initial public offering of 28.75 million units at $10.025 per unit, including 3.75 million units from the underwriters' over-allotment option exercise, the company announced.&lt;/p&gt;

&lt;p&gt;Each unit consists of one Class A ordinary share and half of one redeemable warrant. The warrants are exercisable at $11.50 per share. The units began trading on Nasdaq under ticker symbol &quot;KEYYU&quot; on June 3, 2026.&lt;/p&gt;

&lt;p&gt;The company simultaneously completed a private placement of 8,468,750 warrants at $1.00 per warrant, generating $8.47 million in gross proceeds. Keystone International Acquisition Management LLC, the company's sponsor, purchased 5,593,750 private placement warrants, while</description>
   <guid isPermaLink="true">http://www.streetinsider.com/Equity+Offerings/Keystone+Acquisition+closes+%24287.5+million+IPO+with+over-allotment+option/26607330.html</guid>
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   <title>Keystone Acquisition closes $287.5 million IPO with over-allotment option</title>
   <link>http://www.streetinsider.com/Equity+Offerings/Keystone+Acquisition+closes+%24287.5+million+IPO+with+over-allotment+option/26607330.html</link>
   <description>

&lt;p&gt;Keystone Acquisition Corp. (NASDAQ: KEYYU) completed its initial public offering of 28.75 million units at $10.025 per unit, including 3.75 million units from the underwriters' over-allotment option exercise, the company announced.&lt;/p&gt;

&lt;p&gt;Each unit consists of one Class A ordinary share and half of one redeemable warrant. The warrants are exercisable at $11.50 per share. The units began trading on Nasdaq under ticker symbol &quot;KEYYU&quot; on June 3, 2026.&lt;/p&gt;

&lt;p&gt;The company simultaneously completed a private placement of 8,468,750 warrants at $1.00 per warrant, generating $8.47 million in gross proceeds. Keystone International Acquisition Management LLC, the company's sponsor, purchased 5,593,750 private placement warrants, while</description>
   <guid isPermaLink="true">http://www.streetinsider.com/Equity+Offerings/Keystone+Acquisition+closes+%24287.5+million+IPO+with+over-allotment+option/26607330.html</guid>
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   <title>Keystone Acquisition closes $287.5 million IPO with over-allotment option</title>
   <link>http://www.streetinsider.com/Equity+Offerings/Keystone+Acquisition+closes+%24287.5+million+IPO+with+over-allotment+option/26607330.html</link>
   <description>

&lt;p&gt;Keystone Acquisition Corp. (NASDAQ: KEYYU) completed its initial public offering of 28.75 million units at $10.025 per unit, including 3.75 million units from the underwriters' over-allotment option exercise, the company announced.&lt;/p&gt;

&lt;p&gt;Each unit consists of one Class A ordinary share and half of one redeemable warrant. The warrants are exercisable at $11.50 per share. The units began trading on Nasdaq under ticker symbol &quot;KEYYU&quot; on June 3, 2026.&lt;/p&gt;

&lt;p&gt;The company simultaneously completed a private placement of 8,468,750 warrants at $1.00 per warrant, generating $8.47 million in gross proceeds. Keystone International Acquisition Management LLC, the company's sponsor, purchased 5,593,750 private placement warrants, while</description>
   <guid isPermaLink="true">http://www.streetinsider.com/Equity+Offerings/Keystone+Acquisition+closes+%24287.5+million+IPO+with+over-allotment+option/26607330.html</guid>
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   <title>Correction: Keystone Acquisition Corp. Announces Closing of $287.5 Million Initial Public Offering Including Exercise of Underwriters’ Over-Allotment Option</title>
   <link>http://www.streetinsider.com/Press+Releases/Correction%3A+Keystone+Acquisition+Corp.+Announces+Closing+of+%24287.5+Million+Initial+Public+Offering+Including+Exercise+of+Underwriters%E2%80%99+Over-Allotment+Option/26607329.html</link>
   <description>
&lt;p&gt;NEW YORK, NEW YORK, June  04, 2026  (GLOBE NEWSWIRE) --  Keystone Acquisition Corp. (Nasdaq: KEYYU) (the “Company”) today announced the closing of its initial public offering of 28,750,000 units, which includes 3,750,000 units issued pursuant to the exercise by the underwriters of their over-allotment option, at a public offering price of $10.025 per unit. Each unit consists of one Class A ordinary share and one-half of one redeemable warrant, with each whole warrant exercisable to purchase one Class A ordinary share at a price of $11.50 per share.&lt;/p&gt;  &lt;p align=&quot;justify&quot;&gt;The units are listed on The Nasdaq</description>
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   <title>Correction: Keystone Acquisition Corp. Announces Closing of $287.5 Million Initial Public Offering Including Exercise of Underwriters’ Over-Allotment Option</title>
   <link>http://www.streetinsider.com/Press+Releases/Correction%3A+Keystone+Acquisition+Corp.+Announces+Closing+of+%24287.5+Million+Initial+Public+Offering+Including+Exercise+of+Underwriters%E2%80%99+Over-Allotment+Option/26607329.html</link>
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&lt;p&gt;NEW YORK, NEW YORK, June  04, 2026  (GLOBE NEWSWIRE) --  Keystone Acquisition Corp. (Nasdaq: KEYYU) (the “Company”) today announced the closing of its initial public offering of 28,750,000 units, which includes 3,750,000 units issued pursuant to the exercise by the underwriters of their over-allotment option, at a public offering price of $10.025 per unit. Each unit consists of one Class A ordinary share and one-half of one redeemable warrant, with each whole warrant exercisable to purchase one Class A ordinary share at a price of $11.50 per share.&lt;/p&gt;  &lt;p align=&quot;justify&quot;&gt;The units are listed on The Nasdaq</description>
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   <title>Correction: Keystone Acquisition Corp. Announces Closing of $287.5 Million Initial Public Offering Including Exercise of Underwriters’ Over-Allotment Option</title>
   <link>http://www.streetinsider.com/Press+Releases/Correction%3A+Keystone+Acquisition+Corp.+Announces+Closing+of+%24287.5+Million+Initial+Public+Offering+Including+Exercise+of+Underwriters%E2%80%99+Over-Allotment+Option/26607329.html</link>
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&lt;p&gt;NEW YORK, NEW YORK, June  04, 2026  (GLOBE NEWSWIRE) --  Keystone Acquisition Corp. (Nasdaq: KEYYU) (the “Company”) today announced the closing of its initial public offering of 28,750,000 units, which includes 3,750,000 units issued pursuant to the exercise by the underwriters of their over-allotment option, at a public offering price of $10.025 per unit. Each unit consists of one Class A ordinary share and one-half of one redeemable warrant, with each whole warrant exercisable to purchase one Class A ordinary share at a price of $11.50 per share.&lt;/p&gt;  &lt;p align=&quot;justify&quot;&gt;The units are listed on The Nasdaq</description>
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   <title>Correction: Keystone Acquisition Corp. Announces Closing of $287.5 Million Initial Public Offering Including Exercise of Underwriters’ Over-Allotment Option</title>
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