Insider · CIK 0001192668
Ronald L Olson
Files at BRK-B (BERKSHIRE HATHAWAY INC), ANDG (Andersen Group Inc.). First filing Dec 22, 2025, latest Dec 22, 2025.
In brief
Ronald L Olson files SEC Form 4 as director at ANDG (Andersen Group Inc.), and also at BRK-B (BERKSHIRE HATHAWAY INC). Since Dec 22, 2025, Ronald L Olson has reported 1 open-market buy worth $126k and 0 open-market sells worth $0, the latest filed on Dec 22, 2025.
A track record needs three past buys with six months of prices behind them; Ronald L Olson has 0, so none is measured yet.
The newest scored trade: bought $126k of ANDG on Dec 18, 2025, filed Dec 22, 2025, scored 49 (moderate). In the last 12 months: 1 buy worth $126k and 0 sells worth $0.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
ANDG: Andersen Group Inc.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 49Moderate | Andersen Group Inc. | $126k 7,896 shares | - | - |
Transactions
Every row this insider has filed, 6 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Dec 18, 2025 | ANDG Andersen Group Inc. | POpen-market purchase Class A Common Stock | +7,896 | $16.00 | $126k | 7,896 | Dec 22, 2025 |
| May 17, 2023 | BRK-B BERKSHIRE HATHAWAY INC | CConversion Class B Common Stockindirect: By Olson 2012 Trust | +1,500 | - | - | 2,797 | Oct 30, 2023 |
| May 18, 2023 | BRK-B BERKSHIRE HATHAWAY INC | JOther Class B Common Stockindirect: By Olson 2012 Trust | -1,562 | - | - | 1,235 | Oct 30, 2023 |
| May 19, 2013 | BRK-B BERKSHIRE HATHAWAY INC | JOther Class B Common Stockindirect: By Olson 2012 trust | -781 | - | - | 454 | Oct 30, 2023 |
| May 17, 2023 | BRK-B BERKSHIRE HATHAWAY INC | CConversion Class A Commonderivativeindirect: By Olson 2012 Trust | -1 | - | - | 28 | Oct 30, 2023 |
| May 18, 2023 | BRK-B BERKSHIRE HATHAWAY INC | JOther Class A Common Stockderivativeindirect: By Olson 2012 Trust | -24 | - | - | 4 | Oct 30, 2023 |
Questions about Ronald L Olson
Answered from the filings on this page, as of the latest one.
Is Ronald L Olson buying or selling?
In the last 12 months Ronald L Olson reported 1 open-market buy worth $126k and 0 open-market sells worth $0 on SEC Form 4; the latest was bought $126k of ANDG on Dec 18, 2025. Grants, option exercises and tax withholding are not counted.
How did Ronald L Olson's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Ronald L Olson has 0.
Where does Ronald L Olson file Form 4?
Ronald L Olson has filed Form 4 at ANDG (Andersen Group Inc.); BRK-B (BERKSHIRE HATHAWAY INC). A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.