O'Sullivan Michael J.
See Remarks
O'Sullivan Michael J. has filed 7 SEC Form 4 filings (26 transaction rows) across 2 companies, including BRK.B, SNAP, with disclosures dating back to 2025. 4 of those filings fall inside the rolling window. Most recent filing: Aug 13, 2026.
On the most recent filing, O'Sullivan Michael J. is listed as See Remarks at BERKSHIRE HATHAWAY INC. Inside the rolling window, O'Sullivan Michael J. reported 2 open-market purchases totaling $501K in BRK.B and 2 open-market sales totaling $777K in SNAP. The largest disclosed transaction in the window is a sale of 70,882 SNAP shares on Nov 17, 2025, worth $591K.
Companies traded
- BRK.B
- SNAP
Insider Buying
$501K
reported purchases (SEC code P)
Insider Selling
$777K
reported sales (SEC code S)
Companies
2
in the rolling window
Earlier trades
Open-market purchases and sales filed before the rolling 365-day window, kept from the original Form 4 filings.
Frequently asked questions
How many SEC Form 4 filings has O'Sullivan Michael J. made?
O'Sullivan Michael J. has filed 7 SEC Form 4 filings (26 transaction rows) across 2 companies, including BRK.B, SNAP since 2025.
Which companies does O'Sullivan Michael J. trade?
O'Sullivan Michael J. has filed SEC Form 4 disclosures for 2 companies, including BRK.B, SNAP.
When was O'Sullivan Michael J.'s most recent SEC Form 4 filing?
O'Sullivan Michael J.'s most recent SEC Form 4 filing on Tracefour is dated Aug 13, 2026.
What is O'Sullivan Michael J.'s job title?
On the most recent SEC Form 4 filings tracked by Tracefour, O'Sullivan Michael J. is listed as See Remarks.
What is O'Sullivan Michael J.'s total buy and sell value in the current window?
Inside the rolling retention window, O'Sullivan Michael J. bought $501K and sold $777K based on SEC Form 4 filings.
What was O'Sullivan Michael J.'s largest disclosed transaction?
The largest disclosed transaction in the current window is a sale of 70,882 SNAP shares on 2025-11-17, worth $591K, per SEC Form 4 filings.