Who owns Keystone Acquisition Corp.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of KEYY from SEC Form 13F filings across 26 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 26 institutions disclosed 14.5M shares of Keystone Acquisition Corp. worth $143.3M — about 58.3% of shares outstanding; the largest disclosed holder is GLAZER CAPITAL, LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
26
13F holders
$143.3M
value, 2026 filers
58.3%
of shares outstanding (14.5M sh)
26
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of KEYY's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | GLAZER CAPITAL, LLCNEW | 1.4M | $14.2M | 0.3% | 5.8% | new |
| 2 | Linden Advisors LPNEW | 1.3M | $12.8M | 0.1% | 5.2% | new |
| 3 | Meteora Capital, LLCNEW | 1.1M | $11.0M | 0.9% | 4.5% | new |
| 4 | Polar Asset Management Partners Inc.NEW | 1.1M | $10.8M | 0.2% | 4.4% | new |
| 5 | TORONTO DOMINION BANKNEW | 1.1M | $10.6M | 0.0% | 4.3% | new |
| 6 | SONA ASSET MANAGEMENT (US) LLCNEW | 900,000 | $8.9M | 0.2% | 3.6% | new |
| 7 | TENOR CAPITAL MANAGEMENT Co., L.P.NEW | 750,000 | $7.4M | 0.1% | 3% | new |
| 8 | First Trust Capital Management L.P.NEW | 749,998 | $7.4M | 0.4% | 3% | new |
| 9 | Verition Fund Management LLCNEW | 664,259 | $6.5M | 0.0% | 2.7% | new |
| 10 | Hudson Bay Capital Management LPNEW | 600,000 | $5.9M | 0.0% | 2.4% | new |
| 11 | BOOTHBAY FUND MANAGEMENT, LLCNEW | 513,535 | $5.1M | 0.1% | 2.1% | new |
| 12 | Periscope Capital Inc.NEW | 499,800 | $4.9M | 0.4% | 2% | new |
| 13 | TWO SIGMA INVESTMENTS, LPNEW | 453,124 | $4.5M | 0.0% | 1.8% | new |
| 14 | CSS LLC/ILNEW | 451,508 | $4.5M | 0.2% | 1.8% | new |
| 15 | Shaolin Capital Management LLCNEW | 448,734 | $4.4M | 0.2% | 1.8% | new |
| 16 | Centiva Capital, LPNEW | 425,000 | $4.2M | 0.0% | 1.7% | new |
| 17 | Clear Street Group Inc.NEW | 302,829 | $3.0M | 0.0% | 1.2% | new |
| 18 | Saba Capital Management, L.P.NEW | 299,995 | $3.0M | 0.1% | 1.2% | new |
| 19 | K2 PRINCIPAL FUND, L.P.NEW | 293,023 | $2.9M | 0.2% | 1.2% | new |
| 20 | O'Connor Alternative Investments LLCNEW | 250,000 | $2.5M | 0.2% | 1% | new |
| 21 | WOLVERINE ASSET MANAGEMENT LLCNEW | 200,900 | $2.0M | 0.0% | 0.8% | new |
| 22 | Mint Tower Capital Management B.V.NEW | 200,000 | $2.0M | 0.2% | 0.8% | new |
| 23 | StoneX Group Inc.NEW | 193,290 | $1.9M | 0.1% | 0.8% | new |
| 24 | Governors Lane LPNEW | 181,383 | $1.8M | 0.1% | 0.7% | new |
| 25 | BERKLEY W R CORPNEW | 99,400 | $980,084 | 0.0% | 0.4% | new |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.