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Michael J. O'Sullivan has bought stock on 2 days since May 2026

Insider at Berkshire Hathaway Inc., and 2 other companies

SEC CIK 0001713777 · Filings on SEC.gov ↗

$501KBought

$54.8MSold

Aug 13Last buy

Michael J. O'Sullivan's record

3 months after each buy, from the first price a copier could get.

No buys have 3 months of prices yet. A record shows here at 3.

Companies

Every filing

84 filings since Nov 2017, newest first

BERKSHIRE HATHAWAY INC

Insider

$250K+73.6%Aug 13

Berkshire Hathaway Inc

Insider

$251K+422.0%May 6

Snap Inc

General Counsel

$130K−1.0%Nov 20

Snap Inc

General Counsel

$222K−1.0%Nov 4

Snap Inc

General Counsel

$195K−1.0%Oct 2

Snap Inc

General Counsel

$549K−3.0%Sep 18

Snap Inc

General Counsel

$167K−1.0%Sep 4

Snap Inc

General Counsel

$114K−1.0%Aug 20

Snap Inc

General Counsel

$239K−1.0%Aug 2

Snap Inc

General Counsel

$298K−1.0%Jul 2

Snap Inc

General Counsel

$914K−3.0%Jun 20

Snap Inc

General Counsel

$270K−1.0%Jun 4

Snap Inc

General Counsel

$202K−1.0%May 20

Snap Inc

General Counsel

$272K−1.0%May 2

Snap Inc

General Counsel

$208K−1.0%Apr 1

Snap Inc

General Counsel

$656K−3.0%Mar 20

Snap Inc

General Counsel

$201K−1.0%Mar 4

Snap Inc

General Counsel

$210K−1.0%Feb 2

Snap Inc

General Counsel

$219K−1.0%Dec 19

Snap Inc

General Counsel

$180K−1.0%Dec 1

Snap Inc

General Counsel

$425K−2.0%Nov 20

Snap Inc

General Counsel

$129K−1.0%Nov 2

Snap Inc

General Counsel

$114K−1.0%Oct 3

Snap Inc

General Counsel

$134K−1.0%Sep 1

Snap Inc

General Counsel

$333K−2.0%Aug 18

Snap Inc

General Counsel

$146K−1.0%Aug 2

Snap Inc

General Counsel

$154K−1.0%Jul 5

Snap Inc

General Counsel

$130K−1.0%Jun 2

Snap Inc

General Counsel

$518K−4.0%May 18

Snap Inc

General Counsel

$111K−1.0%May 2

Snap Inc

General Counsel

$145K−1.0%Apr 4

Snap Inc

General Counsel

$132K−1.0%Mar 2

Snap Inc

General Counsel

$675K−3.0%Feb 21

Snap Inc

General Counsel

Snap Inc

General Counsel

$496K−4.0%Nov 18

Snap Inc

General Counsel

$515K−4.0%Aug 18

Snap Inc

General Counsel

$1.0M−4.0%May 18

Snap Inc

General Counsel

$367K−1.0%May 3

Snap Inc

General Counsel

$451K−1.0%Apr 4

Snap Inc

General Counsel

$498K−1.0%Mar 2

Snap Inc

General Counsel

$1.7M−4.0%Feb 18

Snap Inc

General Counsel

$257K−1.0%Jan 7

Snap Inc

General Counsel

$271K−1.0%Dec 17

Snap Inc

General Counsel

$284K−1.0%Dec 2

Snap Inc

General Counsel

$1.4M−2.0%Nov 18

Snap Inc

General Counsel

$315K−1.0%Nov 2

Snap Inc

General Counsel

$443K−1.0%Oct 4

Snap Inc

General Counsel

$458K−1.0%Sep 2

Snap Inc

General Counsel

$6.0M−7.0%Aug 18

Snap Inc

General Counsel

About Michael J. O'Sullivan

Michael J. O'Sullivan

Michael J. O'Sullivan is Senior Vice President, General Counsel, and Secretary at Berkshire Hathaway Inc. (BRK), a position created for him starting January 1, 2026, marking the first in-house legal director role at the company, which previously relied on external counsel.( Based in Omaha, Nebraska, he oversees corporate legal matters.(

O'Sullivan brings over 20 years of experience from Munger, Tolles & Olson, the law firm co-founded by Charlie Munger, Berkshire's late vice chairman.( He most recently served as general counsel at Snap Inc. (Snapchat's parent) since 2017.( On May 6, 2026, his living trust, for which he is trustee, purchased 536 Class B shares of BRK.B indirectly at prices around $467–$470, totaling about $250,545, bringing his holdings to 663 shares valued at roughly $300,000.(

Written by Perplexity from public sources.

Filings come from SEC EDGAR. Not investment advice.