Ronald L. Olson

Insider Reports History

Reporting-owner location: Los Angeles, CA
Latest reporting-owner signature: /s/ William Deckelman as Attorney-in-Fact
Source: Latest parsed Forms 3/4/5 signature
Transaction source note: Rows are grouped by transaction date from the original SEC filing. Open the aggregated insider activity page to review issuer-level activity across dates.

Reported holdings for Ronald L. Olson

Form 4 holding Director

BERKSHIRE HATHAWAY INC

Security class: Class B Common Stock
Shares / value: 19,720
Estimated value: $7,149,543
Report date: 17 May 2023
Price: $362.55
Ownership: By Ronald & Jane Olson Living Trust

Form 4 holding Director

BERKSHIRE HATHAWAY INC

Security class: Class B Common Stock
Shares / value: 5,210
Estimated value: $1,888,901
Report date: 17 May 2023
Price: $362.55
Ownership: Direct

Form 4 holding Director

BERKSHIRE HATHAWAY INC

Security class: Class B Common Stock
Shares / value: 1,515
Estimated value: $549,268
Report date: 17 May 2023
Price: $362.55
Ownership: By Ronald & Jane Olson Foundation

Form 4 holding Director

WESTERN ASSET PREMIER BOND FUND

Security class: Common Stock
Shares / value: 2,000
Estimated value: $22,400
Report date: 20 Jan 2023
Price: $11.20
Ownership: Direct

Form 4 holding Director

Andersen Group Inc.

Security class: Class A Common Stock
Shares / value: 7,896
Estimated value
Report date: 18 Dec 2025
Price
Ownership: Direct

Form 4 holding Director

BERKSHIRE HATHAWAY INC

Security class: Class A Common
Shares / value: 109
Estimated value
Report date: 17 May 2023
Price
Ownership: By Ronald & Jane Olson Living Trust
Underlying class: See Footnote (4)
Underlying amount

Form 4 holding Director

BERKSHIRE HATHAWAY INC

Security class: Class A Common
Shares / value: 28
Estimated value
Report date: 17 May 2023
Price
Ownership: By Olson 2012 Trust
Underlying class: See Footnote (4)
Underlying amount

Form 4 holding Director

BERKSHIRE HATHAWAY INC

Security class: Class A Common Stock
Shares / value: 7
Estimated value
Report date: 17 May 2023
Price
Ownership: Direct
Underlying class: See Footnote (4)
Underlying amount

Form 4 holding Director

BERKSHIRE HATHAWAY INC

Security class: Class A Common Stock
Shares / value: 4
Estimated value
Report date: 18 May 2023
Price
Ownership: By Olson 2012 Trust
Underlying class: See Footnote (4)
Underlying amount

Insider Reports Filed by Ronald L. Olson

4 ANDG

Andersen Group Inc.

Report period: 18 Dec 2025
Transactions: 1
Transaction value: +$126,336
Accepted by SEC: 22 Dec 2025, 16:14
Role: Director
Next action: Open filing details

3 ANDG

Andersen Group Inc.

Report period: 16 Dec 2025
Transactions: 0
Transaction value: $0
Accepted by SEC: 16 Dec 2025, 21:00
Role: Director
Next action: Open filing details

4 BRK-B

BERKSHIRE HATHAWAY INC

Report period: 17 May 2023
Transactions: 5
Transaction value: $0
Accepted by SEC: 30 Oct 2023, 20:33
Role: Director
Next action: Open filing details

4 WEA

WESTERN ASSET PREMIER BOND FUND

Report period: 20 Jan 2023
Transactions: 1
Transaction value: -$201,600
Accepted by SEC: 24 Jan 2023, 15:26
Role: Director
Next action: Open filing details

4 WEA

WESTERN ASSET PREMIER BOND FUND

Report period: 23 Dec 2022
Transactions: 1
Transaction value: +$223,898
Accepted by SEC: 27 Dec 2022, 08:38
Role: Director
Next action: Open filing details

4 BRK-B

BERKSHIRE HATHAWAY INC

Report period: 05 Jul 2022
Transactions: 2
Transaction value: +$661,183
Accepted by SEC: 07 Jul 2022, 17:39
Role: Director
Next action: Open filing details

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