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O'Sullivan Michael J.
InsiderCIK 0001713777
Total Volume
$2.5M
10 filings
Purchases
$500.6K
5 buy txns
Sales
$2.0M
7 sell txns
Net Activity
-$1.5M
net sold
Profile
- Filings
- 10
- Buy transactions
- 5
- Sell transactions
- 7
- Companies
- 2
- Active
- 2025–2026
O'Sullivan Michael J. accounts for 10 disclosed filings worth $2.5M, spread across 2 companies, active 2025–2026. The record is net selling, with $500.6K in purchases against $2.0M in sales. The largest single open-market purchase on record is $250.5K in BERKSHIRE HATHAWAY INC. Data is sourced from official SEC Form 3, 4, and 5 filings.
Associated Companies
Trading History
10 loaded
| Aug 13 | BRK.B BERKSHIRE HATHAWAY INC | O'Sullivan Michael J. | Insider | Buy | $250.1K |
| May 6 | BRK.B BERKSHIRE HATHAWAY INC | O'Sullivan Michael J. | Insider | Buy | $250.5K |
| May 5 | BRK.B BERKSHIRE HATHAWAY INC | O'Sullivan Michael J. | Insider | Other | $0 |
| Nov 19 | SNAP Snap Inc | O'Sullivan Michael J. | Insider | Sell | $591.0K |
| Nov 4 | SNAP Snap Inc | O'Sullivan Michael J. | Insider | Sell | $185.6K |
| Oct 2 | SNAP Snap Inc | O'Sullivan Michael J. | Insider | Sell | $188.5K |
| Sep 18 | SNAP Snap Inc | O'Sullivan Michael J. | Insider | Sell | $108.3K |
| Aug 29 | SNAP Snap Inc | O'Sullivan Michael J. | Insider | Sell | $171.9K |
| Aug 20 | SNAP Snap Inc | O'Sullivan Michael J. | Insider | Sell | $493.1K |
| Aug 4 | SNAP Snap Inc | O'Sullivan Michael J. | Insider | Sell | $229.6K |
10 filings