# KEYSTONE ACQUISITION CORP UNIT 05/28/2031

KEYSTONE ACQUISITION CORP UNIT 05/28/2031 is a security (CUSIP G52539114) tracked across SEC portfolio filings. 4 institutional managers reported $10.5M on Form 13F as of 2026-06-30.

## Summary

- Issuer: KEYSTONE ACQUISITION CORP
- Class: UNIT 05/28/2031
- CUSIP: G52539114
- 13F holders: 4
- 13F value: $10.5M
- 13F period: 2026-06-30
- N-PORT fund positions: 0

## Top institutional holders (Form 13F)

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| Alberta Investment Management Corp | EDMONTON, A0 | $8.0M | 800,000 |
| [Calamos Advisors LLC](https://search.stillhousedata.com/firm/105758) | NAPERVILLE, IL | $2.0M | 200,000 |
| ABC ARBITRAGE SA | PARIS, I0 | $301K | 30,000 |
| [LONGFELLOW INVESTMENT MANAGEMENT CO LLC](https://search.stillhousedata.com/firm/104945) | BOSTON, MA | $87K | 8,642 |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/G52539114.md)
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