Beneficial Ownership Report · SCHEDULE 13G/A
Launch One Acquisition Corp.
LPAANASDAQEQUITYCurrent
Beneficial Ownership Report
Structured filing — SCHEDULE 13G/A
primary_doc.xml
Amendment · This filing reports the amendment as submitted.
Subject company
- Company
- Launch One Acquisition Corp.
- Company CIK
- 0002015502
- Street
- 180 Grand Avenue
- Street (continued)
- Suite 1530
- City
- Oakland
- State / country code
- CA
- Postal code
- 94612
Statement details
- Amendment number
- 1
- Security class
- Class A Ordinary Shares, par value $0.0001 per share
- Event date
- 09/30/2026
- Rule designation
- Rule 13d-1(b)
Reporting person 1
- Name
- W. R. Berkley Corporation
- Citizenship / organization
- DE
- Reporting person type
- CO
- Aggregate amount owned
- 263,767.00
- Percent of class
- 3.5
- Sole voting power
- 0.00
- Shared voting power
- 263,767.00
- Sole dispositive power
- 0.00
- Shared dispositive power
- 263,767.00
- Aggregate excludes certain shares
- N
Reporting person 2
- Name
- Berkley Insurance Company
- Citizenship / organization
- DE
- Reporting person type
- CO · IC
- Aggregate amount owned
- 263,767.00
- Percent of class
- 3.5
- Sole voting power
- 0.00
- Shared voting power
- 263,767.00
- Sole dispositive power
- 0.00
- Shared dispositive power
- 263,767.00
- Aggregate excludes certain shares
- N
Item 1
Issuer
Launch One Acquisition Corp.
Principal executive office address
180 Grand Avenue, Suite 1530, Oakland, California, 94612
Item 2
Citizenship
US
Filing person
W. R. Berkley Corporation
Principal business or residence address
475 Steamboat Road Greenwich, CT 06830
Item 3
Not applicable indication
N
Type of filing person
IC · HC
Item 4
Percent of class
3.5
Amount beneficially owned
263,767
Sole voting power
0
Shared voting power
263,767
Sole dispositive power
0
Shared dispositive power
263,767
Item 5
Not applicable indication
N
Ownership of 5% or less
Y
Item 6
Not applicable indication
Y
Item 7
Not applicable indication
N
Subsidiaries
See Exhibit 99.1
Item 8
Not applicable indication
Y
Item 9
Not applicable indication
Y
Item 10
Not applicable indication
N
Certifications
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.
Signature 1
- Reporting person
- W. R. Berkley Corporation
- Signed
- /s/ Richard M. Baio
- Title
- Richard M. Baio/Executive Vice President and Chief Financial Officer
- Date
- 11/09/2026
Signature 2
- Reporting person
- Berkley Insurance Company
- Signed
- /s/ Richard M. Baio
- Title
- Richard M. Baio/Executive Vice President and Treasurer
- Date
- 11/09/2026
Filed exhibits
- EX-99.1 ↗exhibit991.pdf
Company context
Launch One Acquisition Corp. is a company set up to merge with and take public an exciting business in healthcare or technology. Listed on Nasdaq under the ticker LPAA, Launch One is led by experienced leaders who want to support game-changing solutions. For more information, contact Jurgen van de Vyver at jurgen@launchpad.vc.
Current securities
Recent company filings
- SCHEDULE 13G/A - filed by First Trust Capital Management L.P. regarding Launch One Acquisition Corp.Nov 13, 2026
- SCHEDULE 13G/A - filed by Magnetar Financial LLC regarding Launch One Acquisition Corp.Nov 13, 2026
- SCHEDULE 13G/A - filed by MMCAP International Inc. SPC regarding Launch One Acquisition Corp.Nov 12, 2026
- Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing · Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory ArrangementsNov 9, 2026
- SCHEDULE 13G/A - filed by PICTON MAHONEY ASSET MANAGEMENT regarding Launch One Acquisition Corp.Oct 20, 2026