O'Sullivan Michael J. insider trades
O'Sullivan Michael J. has filed 79 Form 4s with the SEC that we hold, for Snap Inc (SNAP) (General Counsel) and Berkshire Hathaway INC (BRK.B) (See Remarks). Across all of them we count 5 purchases worth $500.6K and 92 sales worth $31.6M reported on Form 4. In the last 12 months: 5 purchases ($500.6K) and 2 sales ($776.7K). The largest single trade was a sale of 56,554 shares of Snap Inc worth $4.0M, dated 2021-08-16. The first filing on our record is dated 2021-07-02 and the latest 2026-08-13.
Snap Inc (SNAP)
General Counsel · 77 filings · 92 purchases and sales
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2021-06-30 | S, sale reported on Form 4 | 2,093 | $141.2K | 2021-07-02 |
| 2021-06-30 | S, sale reported on Form 4 | 3,907 | $266.3K | 2021-07-02 |
| 2021-07-23 | S, sale reported on Form 4 | 7,589 | $595.4K | 2021-07-27 |
| 2021-07-23 | S, sale reported on Form 4 | 9,412 | $730.7K | 2021-07-27 |
| 2021-07-23 | S, sale reported on Form 4 | 5,005 | $383.6K | 2021-07-27 |
| 2021-07-23 | S, sale reported on Form 4 | 2,994 | $226.1K | 2021-07-27 |
| 2021-07-30 | S, sale reported on Form 4 | 2,100 | $158.3K | 2021-08-03 |
| 2021-07-30 | S, sale reported on Form 4 | 3,900 | $291.3K | 2021-08-03 |
| 2021-08-16 | S, sale reported on Form 4 | 27,899 | $2.0M | 2021-08-18 |
| 2021-08-16 | S, sale reported on Form 4 | 56,554 | $4.0M | 2021-08-18 |
| 2021-08-16 | S, sale reported on Form 4 | 800 | $57.6K | 2021-08-18 |
| 2021-08-31 | S, sale reported on Form 4 | 1,100 | $82.4K | 2021-09-02 |
| 2021-08-31 | S, sale reported on Form 4 | 1,600 | $123.6K | 2021-09-02 |
| 2021-08-31 | S, sale reported on Form 4 | 3,300 | $251.7K | 2021-09-02 |
| 2021-09-30 | S, sale reported on Form 4 | 600 | $44.9K | 2021-10-04 |
| 2021-09-30 | S, sale reported on Form 4 | 2,919 | $214.1K | 2021-10-04 |
| 2021-09-30 | S, sale reported on Form 4 | 2,481 | $184.0K | 2021-10-04 |
| 2021-10-29 | S, sale reported on Form 4 | 200 | $10.7K | 2021-11-02 |
| 2021-10-29 | S, sale reported on Form 4 | 5,800 | $304.8K | 2021-11-02 |
| 2021-11-16 | S, sale reported on Form 4 | 900 | $49.3K | 2021-11-18 |
| 2021-11-16 | S, sale reported on Form 4 | 24,346 | $1.3M | 2021-11-18 |
| 2021-11-30 | S, sale reported on Form 4 | 836 | $40.9K | 2021-12-02 |
| 2021-11-30 | S, sale reported on Form 4 | 3,812 | $178.6K | 2021-12-02 |
| 2021-11-30 | S, sale reported on Form 4 | 1,352 | $64.5K | 2021-12-02 |
| 2021-12-15 | S, sale reported on Form 4 | 1,800 | $82.0K | 2021-12-17 |
| 2021-12-15 | S, sale reported on Form 4 | 3,367 | $150.2K | 2021-12-17 |
| 2021-12-15 | S, sale reported on Form 4 | 833 | $38.6K | 2021-12-17 |
| 2022-01-05 | S, sale reported on Form 4 | 2,000 | $85.6K | 2022-01-07 |
| 2022-01-05 | S, sale reported on Form 4 | 1,500 | $62.2K | 2022-01-07 |
| 2022-01-05 | S, sale reported on Form 4 | 2,500 | $109.0K | 2022-01-07 |
| 2022-02-16 | S, sale reported on Form 4 | 43,837 | $1.7M | 2022-02-18 |
| 2022-02-28 | S, sale reported on Form 4 | 3,741 | $151.4K | 2022-03-02 |
| 2022-02-28 | S, sale reported on Form 4 | 8,759 | $346.7K | 2022-03-02 |
| 2022-03-31 | S, sale reported on Form 4 | 12,500 | $451.5K | 2022-04-04 |
| 2022-04-29 | S, sale reported on Form 4 | 6,400 | $190.7K | 2022-05-03 |
| 2022-04-29 | S, sale reported on Form 4 | 6,100 | $176.6K | 2022-05-03 |
| 2022-05-16 | S, sale reported on Form 4 | 43,701 | $1.0M | 2022-05-18 |
| 2022-08-16 | S, sale reported on Form 4 | 41,929 | $515.3K | 2022-08-18 |
| 2022-11-16 | S, sale reported on Form 4 | 44,404 | $495.5K | 2022-11-18 |
| 2022-12-16 | S, sale reported on Form 4 | 5,155 | $43.7K | 2022-12-20 |
| 2023-02-16 | S, sale reported on Form 4 | 61,001 | $674.7K | 2023-02-21 |
| 2023-02-28 | S, sale reported on Form 4 | 13,000 | $131.9K | 2023-03-02 |
| 2023-03-31 | S, sale reported on Form 4 | 13,000 | $144.7K | 2023-04-04 |
| 2023-04-28 | S, sale reported on Form 4 | 13,000 | $111.2K | 2023-05-02 |
| 2023-05-16 | S, sale reported on Form 4 | 60,793 | $517.3K | 2023-05-18 |
| 2023-05-31 | S, sale reported on Form 4 | 13,000 | $129.9K | 2023-06-02 |
| 2023-06-30 | S, sale reported on Form 4 | 13,000 | $154.3K | 2023-07-05 |
| 2023-07-31 | S, sale reported on Form 4 | 13,000 | $145.9K | 2023-08-02 |
| 2023-08-16 | S, sale reported on Form 4 | 36,037 | $332.6K | 2023-08-18 |
| 2023-08-31 | S, sale reported on Form 4 | 13,000 | $134.3K | 2023-09-01 |
| 2023-09-29 | S, sale reported on Form 4 | 13,000 | $113.8K | 2023-10-03 |
| 2023-10-31 | S, sale reported on Form 4 | 13,000 | $129.1K | 2023-11-02 |
| 2023-11-16 | S, sale reported on Form 4 | 35,683 | $424.6K | 2023-11-20 |
| 2023-11-30 | S, sale reported on Form 4 | 13,000 | $179.8K | 2023-12-01 |
| 2023-12-15 | S, sale reported on Form 4 | 13,000 | $219.4K | 2023-12-19 |
| 2024-01-31 | S, sale reported on Form 4 | 13,000 | $210.1K | 2024-02-02 |
| 2024-02-29 | S, sale reported on Form 4 | 18,000 | $199.1K | 2024-03-04 |
| 2024-02-29 | S, sale reported on Form 4 | 160 | $1.8K | 2024-03-04 |
| 2024-03-18 | S, sale reported on Form 4 | 59,641 | $656.1K | 2024-03-20 |
| 2024-03-28 | S, sale reported on Form 4 | 18,000 | $207.5K | 2024-04-01 |
| 2024-04-30 | S, sale reported on Form 4 | 18,000 | $271.8K | 2024-05-02 |
| 2024-05-16 | S, sale reported on Form 4 | 12,695 | $202.0K | 2024-05-20 |
| 2024-05-31 | S, sale reported on Form 4 | 18,000 | $270.2K | 2024-06-04 |
| 2024-06-17 | S, sale reported on Form 4 | 58,924 | $913.9K | 2024-06-20 |
| 2024-06-28 | S, sale reported on Form 4 | 18,000 | $298.1K | 2024-07-02 |
| 2024-07-31 | S, sale reported on Form 4 | 18,000 | $239.0K | 2024-08-02 |
| 2024-08-16 | S, sale reported on Form 4 | 12,512 | $114.0K | 2024-08-20 |
| 2024-08-30 | S, sale reported on Form 4 | 18,000 | $167.4K | 2024-09-04 |
| 2024-09-16 | S, sale reported on Form 4 | 59,053 | $548.6K | 2024-09-18 |
| 2024-09-30 | S, sale reported on Form 4 | 18,000 | $194.6K | 2024-10-02 |
| 2024-10-31 | S, sale reported on Form 4 | 18,000 | $221.8K | 2024-11-04 |
| 2024-11-18 | S, sale reported on Form 4 | 12,315 | $129.8K | 2024-11-20 |
| 2024-11-29 | S, sale reported on Form 4 | 18,000 | $214.0K | 2024-12-03 |
| 2024-12-16 | S, sale reported on Form 4 | 56,961 | $651.6K | 2024-12-18 |
| 2024-12-31 | S, sale reported on Form 4 | 18,000 | $195.1K | 2025-01-02 |
| 2025-01-31 | S, sale reported on Form 4 | 18,000 | $206.8K | 2025-02-03 |
| 2025-02-18 | S, sale reported on Form 4 | 69,119 | $749.2K | 2025-02-20 |
| 2025-02-28 | S, sale reported on Form 4 | 24,000 | $243.8K | 2025-03-04 |
| 2025-03-17 | S, sale reported on Form 4 | 14,183 | $125.2K | 2025-03-18 |
| 2025-03-31 | S, sale reported on Form 4 | 24,000 | $206.4K | 2025-04-02 |
| 2025-04-30 | S, sale reported on Form 4 | 24,000 | $185.8K | 2025-05-01 |
| 2025-05-16 | S, sale reported on Form 4 | 68,845 | $591.4K | 2025-05-19 |
| 2025-05-30 | S, sale reported on Form 4 | 24,000 | $195.6K | 2025-06-03 |
| 2025-06-16 | S, sale reported on Form 4 | 14,297 | $114.9K | 2025-06-18 |
| 2025-06-30 | S, sale reported on Form 4 | 24,000 | $209.0K | 2025-07-02 |
| 2025-07-31 | S, sale reported on Form 4 | 24,000 | $229.7K | 2025-08-04 |
| 2025-08-18 | S, sale reported on Form 4 | 68,705 | $493.3K | 2025-08-20 |
| 2025-08-29 | S, sale reported on Form 4 | 24,000 | $171.8K | 2025-08-29 |
| 2025-09-16 | S, sale reported on Form 4 | 14,290 | $108.3K | 2025-09-18 |
| 2025-09-30 | S, sale reported on Form 4 | 24,000 | $188.6K | 2025-10-02 |
| 2025-10-31 | S, sale reported on Form 4 | 24,000 | $185.5K | 2025-11-04 |
| 2025-11-17 | S, sale reported on Form 4 | 70,882 | $591.2K | 2025-11-19 |
Berkshire Hathaway INC (BRK.B)
See Remarks · 2 filings · 5 purchases and sales
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2026-05-06 | P, purchase reported on Form 4 | 483 | $225.6K | 2026-05-06 |
| 2026-05-06 | P, purchase reported on Form 4 | 53 | $24.9K | 2026-05-06 |
| 2026-08-12 | P, purchase reported on Form 4 | 45 | $23.0K | 2026-08-13 |
| 2026-08-12 | P, purchase reported on Form 4 | 400 | $205.0K | 2026-08-13 |
| 2026-08-12 | P, purchase reported on Form 4 | 43 | $22.1K | 2026-08-13 |
Source
Counted from the Form 4 filings this reporting owner (SEC CIK 1713777) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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