O'Sullivan Michael J.
- SEC CIK
- 0001713777
In the past year, 2 open-market purchase filings worth $500.6K and 2 sale filings worth $776.7K.
Current role at each company
- BRK.A Berkshire Hathaway IncSee Remarksas of Aug 13, 2026
- SNAP Snap IncGeneral Counselas of Nov 19, 2025
Open-market trades in the past year
Open-market purchases (P) and sales (S) filed in the last 365 days, not counting derivative securities or duplicate filings. Values leave out price outliers.
- Bought
- $500.6K
- 2 filings
- Sold
- $776.7K
- 2 filings
- Net
- −$276.1K
- Bought minus sold
- Companies
- 2
- With open-market trades
Trades
Every Form 4 that lists O'Sullivan Michael J. as a reporting owner, including filings made jointly with others, grouped by company. Each row adds up one type of transaction in one filing. Only open-market purchases (P) and sales (S) are shown by default.
BRK.A Berkshire Hathaway Inc
See Remarks2 trades
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| May 6, 2026 (view filing) | May 6 | Same day | O'Sullivan Michael J.See Remarks | PPurchaseClass B Common Stock | +536 | $467.44 | +$250.5K | +422.0%663 after | 2 lots |
| Aug 13, 2026 (view filing)5:06 PM ET | Aug 12 | 1 day | O'Sullivan Michael J.See Remarks | PPurchaseClass B Common Stock | +488 | $512.44 | +$250.1K | +73.6%1.15K after | 3 lots |
SNAP Snap Inc
General Counsel71 trades
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Jul 2, 2021 (view filing) | Jun 30 | 2 days | O'Sullivan Michael J.General Counsel | SSaleClass A Common Stock | −6.00K | $67.92 | −$407.5K | −1.9%316.9K after | 2 lots |
| Jul 27, 2021 (view filing) | Jul 23 | 4 days | O'Sullivan Michael J.General Counsel | SSaleClass A Common Stock | −25.0K | $77.43 | −$1.94M | −7.9%291.9K after | 4 lots |
| Aug 3, 2021 (view filing) | Jul 30 | 4 days | O'Sullivan Michael J.General Counsel | SSaleClass A Common Stock | −6.00K | $74.93 | −$449.6K | −2.1%285.9K after | 2 lots |
| Aug 18, 2021 (view filing) | Aug 16 | 2 days | O'Sullivan Michael J.General Counsel | SSaleClass A Common Stock | −85.3K | $70.70 | −$6.03M | −8.9%872.4K after | 3 lots |
| Sep 2, 2021 (view filing) | Aug 31 | 2 days | O'Sullivan Michael J.General Counsel | SSaleClass A Common Stock | −6.00K | $76.29 | −$457.7K | −1.7%348.1K after | 3 lots |
| Oct 4, 2021 (view filing) | Sep 30 | 4 days | O'Sullivan Michael J.General Counsel | SSaleClass A Common Stock | −6.00K | $73.83 | −$443.0K | −1.7%342.1K after | 3 lots |
| Nov 2, 2021 (view filing) | Oct 29 | 4 days | O'Sullivan Michael J.General Counsel | SSaleClass A Common Stock | −6.00K | $52.58 | −$315.5K | −1.8%336.1K after | 2 lots |
| Nov 18, 2021 (view filing) | Nov 16 | 2 days | O'Sullivan Michael J.General Counsel | SSaleClass A Common Stock | −25.2K | $54.29 | −$1.37M | −3.1%779.0K after | 2 lots |
| Dec 2, 2021 (view filing) | Nov 30 | 2 days | O'Sullivan Michael J.General Counsel | SSaleClass A Common Stock | −6.00K | $47.32 | −$283.9K | −1.7%351.7K after | 3 lots |
| Dec 17, 2021 (view filing) | Dec 15 | 2 days | O'Sullivan Michael J.General Counsel | SSaleClass A Common Stock | −6.00K | $45.12 | −$270.7K | −1.7%345.7K after | 3 lots |