O'SULLIVAN MICHAEL J. (See Remarks) purchased 422.0% of their position (536.00 shares) of BERKSHIRE HATHAWAY INC on the open market
Open‑market purchase worth $250.5K — a major conviction buy. The strongest form of insider conviction signal.
P · 2 purchases
Filed: 5/6/2026ACC: 0001193125-26-209661
Officer· See Remarks
Since May 2026
+536.00
Net shares
Net buyer
$250.5K
Total acquired
2
Open market trades
2B · 0S
2
Total transactions
536.00 acquired
Non-Derivative Transactions2
Class B Common Stock
Indirect
Shares
+483.00
Price / share
$467.13
Trade value
$225.62K
% of position
380.3%
5/6/2026
127.00→610.00
Class B Common Stock
Indirect
Shares
+53.00
Price / share
$470.22
Trade value
$24.92K
% of position
8.7%
5/6/2026
610.00→663.00
Total
Net shares
+536.00
Net value
$250.55K
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Class B Common Stock Indirect | 5/6/2026 | P · Purchase | +483.00 | $467.13 | $225.62K | 380.3% | 127.00 | 610.00 |
| Class B Common Stock Indirect | 5/6/2026 | P · Purchase | +53.00 | $470.22 | $24.92K | 8.7% | 610.00 | 663.00 |
| Total | +536.00 | $250.55K | ||||||
Derivative Transactions0
No derivative transactions reported