O'Sullivan Michael J.

Insider

Senior Vice President, General Counsel and Secretary

Trades at: BRK.B· SNAP

30D 90D 1Y

Net shares · 90d

+536

536 buy · 0 sell

Net value · 90d

$250.5K

$250.5K in · $0 out

Sentiment · 90d

Net buying

100% buying · 0% selling

Open-market trades · 90d

536 buy · 0 sell

Trading track record · all companies

Running net of open-market buys − sells across every company. Tap the line or a marker for details. ▲ buy · ▼ sell.

All transactions · open-market

Include grants & non-market

BRK.B Buy·P
May 6, 26

Senior Vice President, Genera…

$250.5K

536 sh · $467.44 avg · 2 lots

Own +422%

Date▾	Ticker	Role	Type	Shares	Own Δ	Price	Value
May 6, 2026	BRK.B	Senior Vice President, General Counsel and Secretary	Buy P	5362 lots	+422%	$467.44 avg	$250.5K

About O'Sullivan Michael J.

This profile aggregates every SEC Form 4 insider transaction reported by O'Sullivan Michael J. across all companies they trade. Open-market purchases (code P) and sales (code S) are the highest-signal, discretionary trades; grants (A), option exercises (M) and gifts (G) reflect compensation rather than conviction and carry no market price. Figures cover the selected period and update as new filings are ingested.