Keystone Acquisition Corp.

KEYY

Exchange: Nasdaq
Industry: Blank Checks
SEC CIK: 0002102771

SEC filings (opens in a new tab)

No open-market purchases or sales by Keystone Acquisition Corp. insiders were filed in the last 90 days; 26 institutions reported holding it in 13F filings for Q2 2026, worth $143.3M in total; no superinvestor holds it.

Other share classesKEYYU KEYYW

Q2 2026 vs. Q1 2026

How the institutions holding Keystone Acquisition Corp. changed between Q1 2026 and Q2 2026.

All holders in Q2 2026 All holders in Q1 2026

13F holders of KEYY: Q1 2026 compared with Q2 2026
Measure	Q1 2026	Q2 2026	Change
Holders	0	26	+26
Shares	0	14.5M	+14.5M
Value	$0	$143.3M	+$143.3M

New holders (26)

Institutions that held Keystone Acquisition Corp. at the end of Q2 2026 but not at the end of Q1 2026.

Institutions new to KEYY in Q2 2026
Institution	Shares	Value	% of portfolio
Glazer Capital, LLC	1,437,045	$14.2M	0.35%
Linden Advisors LP	1,300,000	$12.8M	0.07%
Meteora Capital, LLC	1,116,282	$11.0M	0.91%
Polar Asset Management Partners Inc.	1,100,000	$10.8M	0.20%
Toronto Dominion Bank	1,079,982	$10.6M	0.02%
Sona Asset Management (US) LLC	900,000	$8.87M	0.33%
Tenor Capital Management Co., L.P.	750,000	$7.39M	0.10%
Vivaldi Asset Management, LLC	749,998	$7.39M	0.43%
Verition Fund Management LLC	664,259	$6.55M	0.05%
Hudson Bay Capital Management LP	600,000	$5.92M	0.03%
Boothbay Fund Management, LLC	513,535	$5.06M	0.10%
Periscope Capital Inc.	499,800	$4.93M	0.78%
Two Sigma Investments, LP	453,124	$4.47M	0.00%
CSS LLC	451,508	$4.45M	0.20%
Shaolin Capital Management LLC	448,734	$4.42M	0.25%
Centiva Capital, LP	425,000	$4.19M	0.14%
Clear Street Group Inc.	302,829	$2.99M	0.01%
Saba Capital Management, L.P.	299,995	$2.96M	0.09%
K2 Principal Fund, L.P.	293,023	$2.89M	0.27%
O'Connor Alternative Investments LLC	250,000	$2.46M	0.18%
Wolverine Asset Management LLC	200,900	$1.98M	0.03%
Mint Tower Capital Management B.V.	200,000	$1.97M	0.23%
StoneX Group Inc.	193,290	$1.91M	0.08%
Governors Lane LP	181,383	$1.79M	0.18%
Berkley W R Corp	99,400	$980.1K	0.05%
Virtu Financial LLC	24,639	$243.0K	0.01%

Sold out (0)

Institutions that held Keystone Acquisition Corp. at the end of Q1 2026 and filed for Q2 2026 without it.

None.