BERKLEY W R CORP - 31 Mar 2026 SCHEDULE 13G/A Report for CAYSON ACQUISITION CORP Ordinary Shares, par value $0.0001 per share (CAPN)

Filing manager: BERKLEY W R CORP
Reporting owner: W.R. Berkley Corporation
Security: CAYSON ACQUISITION CORP Ordinary Shares, par value $0.0001 per share
Beneficially owned shares: 997,282 shares
Large-stake signal: Form
SCHEDULE 13G/A
Passive or exempt beneficial ownership filing.
Ownership
9.4%
Beneficial ownership of this reported class.
Shares
997,282 shares
Shares beneficially owned as disclosed.
Event date
31 Mar 2026
Date tied to the ownership event or amendment.
Accepted by SEC
07 May 2026
EDGAR acceptance date.
How to read this large-stake filing
Schedule 13D/G filings focus on beneficial ownership stakes, not a full portfolio.
Compare this filing with the holder history and issuer page before treating the percentage as a current position.
Use amendments to understand whether the disclosed stake increased, decreased, or changed reporting status.
Class ownership: 9.4%
Symbol: CAPN
Shares outstanding: 10,609,383 shares
Form type: SCHEDULE 13G/A
Accepted by SEC: 07 May 2026, 17:21:04 UTC
Event date: 31 Mar 2026
Previous filing: 08 Apr 2025
SEC filing: View on sec.gov

Key filing fact

BERKLEY W R CORP disclosed 9.4% ownership in CAYSON ACQUISITION CORP Ordinary Shares, par value $0.0001 per share (CAPN) on 31 Mar 2026.

Key facts

BERKLEY W R CORP filed SCHEDULE 13G/A for CAYSON ACQUISITION CORP Ordinary Shares, par value $0.0001 per share (CAPN).
Disclosed ownership: 9.4%.
Date of event: 31 Mar 2026.

This page turns one Schedule 13D/G filing into a quick large-stake read before the raw reporting-person rows.
Use the linked SEC filing as the source of truth for ownership percentages, shares, and reporting-party details.

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

Reporting persons

Names, ownership percentages, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.

Name	Ownership	Shares owned	Sole voting power	Shared voting power	Signature	Title	CIK
W.R. Berkley Corporation	9.4%	997,282	0	997,282	/s/ Richard M. Baio	Richard M. Baio/Executive Vice President and Chief Financial Officer
Berkley Insurance Company	9.4%	997,282	0	997,282	/s/ Richard M. Baio	Richard M. Baio/Executive Vice President and Treasurer

CIK / CUSIP context first

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