Does Michael J. O'Sullivan’s Form 3 show any Berkshire Hathaway share transactions?

The Form 3 functions as an initial ownership report rather than a trade notice. It lists 127 Class B shares held indirectly via a living trust, with no reported purchases, sales, or derivative exercises in the disclosed transaction summary.

127 Berkshire Hathaway Class B shares held via trust (NYSE: BRK.B)

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Berkshire Hathaway Inc. officer Michael J. O'Sullivan filed an initial Form 3 showing beneficial ownership of the company's Class B Common Stock. The filing reports indirect ownership of 127 shares of Class B Common Stock, held by a living trust for which he serves as trustee.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider O'Sullivan Michael J.

Role See Remarks

Type	Security	Shares	Price	Value
holding	Class B Common Stock	--	--	--

Holdings After Transaction: Class B Common Stock — 127 shares (Indirect, By Trust)

Footnotes (1)

[object Object]

Key Figures

Class B shares owned: 127 shares Reported buy transactions: 0 transactions Reported sell transactions: 0 transactions +1 more

4 metrics

Class B shares owned 127 shares Indirect beneficial ownership via living trust

Reported buy transactions 0 transactions Form 3 transaction summary buyCount

Reported sell transactions 0 transactions Form 3 transaction summary sellCount

Holding entries 1 entry Form 3 transaction summary holdingEntries

Key Terms

Class B Common Stock, living trust, trustee, indirect

4 terms

Class B Common Stock financial

"security_title: "Class B Common Stock""

A class B common stock is one of multiple types of a company’s ordinary shares that carries specific rights—often different voting power or dividend priority—compared with other classes. For investors it matters because those differences affect how much influence you have over company decisions, the income you might receive, and how freely the shares trade; think of it like owning a car with different keys: some keys let you start the engine and open the trunk, others only unlock the door.

living trust financial

"Shares held by a living trust of which the reporting person is trustee."

trustee financial

"Shares held by a living trust of which the reporting person is trustee."

A trustee is a person or institution legally appointed to hold and manage assets or enforce an agreement on behalf of other people (beneficiaries). Think of a trustee as a neutral referee or custodian who must act in the beneficiaries’ best interests, follow the trust or contract rules, and handle distributions, recordkeeping and enforcement. Investors care because a trustworthy trustee protects their rights, ensures promised payments or remedies are delivered, and can influence recoveries if things go wrong.

indirect financial

"Ownership type is reported as indirect, held by a trust."

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05/05/2026 - 04:05 PM

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

O'Sullivan Michael J.

(Last)

(First)

(Middle)

3555 FARNAM STREET

(Street)

OMAHA

NEBRASKA

68131

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
05/03/2026

3. Issuer Name and Ticker or Trading Symbol
BERKSHIRE HATHAWAY INC [ BRK.B ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	See Remarks

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class B Common Stock	127	I	By Trust⁽¹⁾

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)

Explanation of Responses:

1. Shares held by a living trust of which the reporting person is trustee.

Remarks:

Senior Vice President, General Counsel and Secretary

	/s/ Michael O'Sullivan	05/05/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What does Michael J. O'Sullivan's Form 3 for BRK indicate?

The Form 3 shows Michael J. O'Sullivan’s initial beneficial ownership in Berkshire Hathaway Inc. It reports indirect holdings of 127 shares of Class B Common Stock, reflecting his position through a living trust where he serves as trustee.

How many Berkshire Hathaway (BRK.B) shares does Michael J. O'Sullivan report?

He reports beneficial ownership of 127 shares of Berkshire Hathaway Class B Common Stock. These shares are not held directly in his name but are owned through a living trust that identifies him as the trustee responsible for the holdings.

Is Michael J. O'Sullivan’s ownership in Berkshire Hathaway direct or indirect?

His reported Berkshire Hathaway holdings are indirect. The 127 Class B shares are held by a living trust. The filing notes that he is the trustee of this trust, meaning he oversees the trust’s shares rather than holding them personally.

What role does the living trust play in Michael J. O'Sullivan’s BRK.B holdings?

The living trust is the legal owner of the 127 Class B shares. According to the filing footnote, Michael J. O'Sullivan is the trustee of this trust, so his beneficial ownership arises from his trustee role rather than direct personal share ownership.