Michael J. O'Sullivan

Companies

• Berkshire HathawayOfficer May 5, 2026 to now¹
• Snap Inc.General counsel Aug 7, 2017 to now²

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• Snap Inc. SNAP2,345,436 shares³$14.8M at $6.33Nov 17, 2025
• Berkshire Hathaway BRK-B1,151 shares⁴$624.2K at $542.33Aug 12, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Aug 12, 2026Bought 43 shares at $513.61 of Berkshire Hathaway⁴
• Aug 12, 2026Bought 400 shares at $512.52 of Berkshire Hathaway⁴
• Aug 12, 2026Bought 45 shares at $510.64 of Berkshire Hathaway⁴
• May 6, 2026Bought 53 shares at $470.22 of Berkshire Hathaway⁵
• May 6, 2026Bought 483 shares at $467.13 of Berkshire Hathaway⁵
• Nov 17, 2025Other 60,094 shares of Snap Inc.³
• Nov 17, 2025Other 60,094 shares of Snap Inc.³
• Nov 17, 2025Sold 70,882 shares at $8.34 of Snap Inc.³
• Oct 31, 2025Sold 24,000 shares at $7.73 of Snap Inc.⁶
• Sep 30, 2025Sold 24,000 shares at $7.86 of Snap Inc.⁷
• Sep 16, 2025Other 13,200 shares of Snap Inc.⁸
• Sep 16, 2025Other 13,200 shares of Snap Inc.⁸
• Sep 16, 2025Sold 14,290 shares at $7.58 of Snap Inc.⁸
• Aug 29, 2025Sold 24,000 shares at $7.16 of Snap Inc.⁹
• Aug 18, 2025Other 62,270 shares of Snap Inc.¹⁰
• Aug 18, 2025Other 62,270 shares of Snap Inc.¹⁰
• Aug 18, 2025Sold 68,705 shares at $7.18 of Snap Inc.¹⁰
• Jul 31, 2025Sold 24,000 shares at $9.57 of Snap Inc.¹¹
• Jun 30, 2025Sold 24,000 shares at $8.71 of Snap Inc.¹²
• Jun 16, 2025Other 13,194 shares of Snap Inc.¹³
• Jun 16, 2025Other 13,194 shares of Snap Inc.¹³
• Jun 16, 2025Sold 14,297 shares at $8.04 of Snap Inc.¹³
• May 30, 2025Sold 24,000 shares at $8.15 of Snap Inc.¹⁴
• May 16, 2025Other 62,130 shares of Snap Inc.¹⁵
• May 16, 2025Other 62,130 shares of Snap Inc.¹⁵