person · Reporting owner
O'Sullivan Michael J.
Disclosed activity across 2 companies
Sign in to followReported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| BERKSHIRE HATHAWAY INCBRK.B · Entity 2792 | See Remarks | August 12, 2026 | August 13, 2026 |
| Snap IncSNAP · Entity 3584 | General Counsel | November 17, 2025 | November 20, 2025 |
Disclosed balances
About these balances
Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.
BERKSHIRE HATHAWAY INC
Report date August 12, 2026 · Filed August 13, 2026
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Class B Common StockSEC Table I · non-derivative | IndirectBy Trust | 1,151 |
Last balance in matching sequence
After 2026-08-12 transaction · row 3
Source-order balances reconcile. Account continuity and personal attribution are not independently verified.
3 source rowsRow 1 · 2026-08-12 · Purchase · Acquired 45 · Balance 708 F1: The reported price in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $510.58 to $510.68 per share, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote. F4: Shares held by a living trust of which the reporting person is trustee. Row 2 · 2026-08-12 · Purchase · Acquired 400 · Balance 1,108 F2: The reported price in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $512.42 to $512.54 per share, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote. F4: Shares held by a living trust of which the reporting person is trustee. Row 3 · 2026-08-12 · Purchase · Acquired 43 · Balance 1,151 F3: The reported price in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $513.60 to $513.64 per share, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote. F4: Shares held by a living trust of which the reporting person is trustee. |
Filing footnotes · ownership attribution and instrument terms
F1: The reported price in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $510.58 to $510.68 per share, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.
F2: The reported price in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $512.42 to $512.54 per share, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.
F3: The reported price in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $513.60 to $513.64 per share, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.
F4: Shares held by a living trust of which the reporting person is trustee.
Snap Inc
Report date November 17, 2025 · Filed November 20, 2025
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Class A Common StockSEC Table I · non-derivative | Direct | 1,794,888 |
Ending reported balance
After 2025-11-17 transaction · row 2
2 source rows · reconciled sequenceRow 1 · 2025-11-17 · Sale · Disposed 70,882 · Balance 1,854,982 F1: Represents the sale of shares to cover tax withholding obligations in connection with the settlement and release of restricted stock units ("RSUs") granted by the Issuer to the reporting person. Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock. F2: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.17 to $8.445 per share, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Row 2 · 2025-11-17 · Other · Disposed 60,094 · Balance 1,794,888 F3: Stock transfer by the reporting person to an entity or entities in which the reporting person retains investment power over such shares. |
| Class A Common StockSEC Table I · non-derivative | IndirectBy Trust | 550,548 |
Reported balance
After 2025-11-17 transaction · row 3
Account identity is unresolved; indirect or unspecified ownership is not merged.
1 source rowRow 3 · 2025-11-17 · Other · Acquired 60,094 · Balance 550,548 F4: Includes 160 shares held by certain immediate family members of the reporting person for which the reporting person disclaims beneficial ownership except as to the reporting person's indirect pecuniary interest therein, if any. The remaining shares are held by an entity or entities in which the reporting person retains investment power over such shares. |
Filing footnotes · ownership attribution and instrument terms
F1: Represents the sale of shares to cover tax withholding obligations in connection with the settlement and release of restricted stock units ("RSUs") granted by the Issuer to the reporting person. Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock.
F2: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.17 to $8.445 per share, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F3: Stock transfer by the reporting person to an entity or entities in which the reporting person retains investment power over such shares.
F4: Includes 160 shares held by certain immediate family members of the reporting person for which the reporting person disclaims beneficial ownership except as to the reporting person's indirect pecuniary interest therein, if any. The remaining shares are held by an entity or entities in which the reporting person retains investment power over such shares.
Transaction history
JSON APIPurchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”
The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.
| Transaction date | Company | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| May 17, 2019 Filed May 20, 2019 23:42 UTC | Snap Inc SNAP · Entity 3584 | SaleClass A Common Stock | 18,500 | $11.22 | $207,570.00 |
DisclosureSEC source: 0001209191-19-031555 · doc4.xml · nonDerivative · entry 3 O'Sullivan Michael J. · CIK 0001713777 · General Counsel 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 1,709,957 F4 · shares: The sales reported were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person. Read SEC document |
| May 16, 2019 Filed May 20, 2019 23:42 UTC | Snap Inc SNAP · Entity 3584 | SaleClass A Common Stock | 18,121 | $11.35 | $205,633.48 |
DisclosureSEC source: 0001209191-19-031555 · doc4.xml · nonDerivative · entry 2 O'Sullivan Michael J. · CIK 0001713777 · General Counsel 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 1,728,457 F2 · shares: Represents the sale of shares to cover tax withholding obligations in connection with the settlement and release of restricted stock units ("RSUs") granted by the issuer to the reporting person. Each RSU represents a contingent right to receive one share of issuer's Class A Common Stock. F3 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $11.32 to $11.43 per share, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| May 16, 2019 Filed May 20, 2019 23:42 UTC | Snap Inc SNAP · Entity 3584 | GrantClass A Common Stock | 750,000 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-19-031555 · doc4.xml · nonDerivative · entry 1 O'Sullivan Michael J. · CIK 0001713777 · General Counsel 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 1,746,578 F1 · shares: Consists of 750,000 shares of Class A Common Stock issued to the reporting person as a restricted stock award, subject to a forfeiture condition. The forfeiture condition will lapse as to 1/16th of the shares subject to the award after the reporting person completes each quarter of continuous service from May 15, 2019. If the reporting person dies while in continuous service, the forfeiture condition will lapse immediately as to 100% of the then unvested shares. Read SEC document |
| April 17, 2019 Filed Apr 18, 2019 23:42 UTC | Snap Inc SNAP · Entity 3584 | SaleClass A Common Stock | 18,500 | $11.80 | $218,300.00 |
DisclosureSEC source: 0001209191-19-025305 · doc4.xml · nonDerivative · entry 1 O'Sullivan Michael J. · CIK 0001713777 · General Counsel 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 996,578 F1 · shares: The sales reported were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person. Read SEC document |
| March 19, 2019 Filed Mar 20, 2019 23:47 UTC | Snap Inc SNAP · Entity 3584 | SaleClass A Common Stock | 18,500 | $10.89 | $201,465.00 |
DisclosureSEC source: 0001209191-19-020684 · doc4.xml · nonDerivative · entry 1 O'Sullivan Michael J. · CIK 0001713777 · General Counsel 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 1,015,078 F1 · shares: The sales reported were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person. Read SEC document |
| February 28, 2019 Filed Mar 2, 2019 00:05 UTC | Snap Inc SNAP · Entity 3584 | SaleClass A Common Stock | 18,500 | $9.85 | $182,225.00 |
DisclosureSEC source: 0001209191-19-015201 · doc4.xml · nonDerivative · entry 1 O'Sullivan Michael J. · CIK 0001713777 · General Counsel 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 1,033,578 F1 · shares: The sales reported were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person. Read SEC document |
| February 19, 2019 Filed Feb 22, 2019 00:37 UTC | Snap Inc SNAP · Entity 3584 | SaleClass A Common Stock | 18,484 | $9.30 | $171,982.53 |
DisclosureSEC source: 0001209191-19-012311 · doc4.xml · nonDerivative · entry 1 O'Sullivan Michael J. · CIK 0001713777 · General Counsel 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 1,052,078 F1 · shares: Represents the sale of shares to cover tax withholding obligations in connection with the settlement and release of restricted stock units ("RSUs") granted by the issuer to the reporting person. Each RSU represents a contingent right to receive one share of issuer's Class A Common Stock. F2 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.235 to $9.315 per share, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| December 13, 2018 Filed Dec 15, 2018 01:34 UTC | Snap Inc SNAP · Entity 3584 | GrantClass A Common Stock | 72,767 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-18-062836 · doc4.xml · nonDerivative · entry 1 O'Sullivan Michael J. · CIK 0001713777 · General Counsel 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 1,070,562 F1 · shares: Represents shares issuable on settlement of restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock. 100% of the RSUs shall vest after the reporting person completes six months of continuous service from December 15, 2018. If the reporting person dies while in continuous service, 100% of the RSUs will be deemed fully vested immediately. Read SEC document |
| November 16, 2018 Filed Nov 20, 2018 23:34 UTC | Snap Inc SNAP · Entity 3584 | SaleClass A Common Stock | 27,868 | $6.46 | $180,124.82 |
DisclosureSEC source: 0001209191-18-059566 · doc4.xml · nonDerivative · entry 1 O'Sullivan Michael J. · CIK 0001713777 · General Counsel 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 997,795 F1 · shares: Represents the sale of shares to cover tax withholding obligations in connection with the settlement and release of restricted stock units ("RSUs") granted by the issuer to the reporting person. Each RSU represents a contingent right to receive one share of issuer's Class A Common Stock. F2 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.45 to $6.5101 per share, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| August 16, 2018 Filed Aug 20, 2018 22:46 UTC | Snap Inc SNAP · Entity 3584 | SaleClass A Common Stock | 10,648 | $12.43 | $132,324.83 |
DisclosureSEC source: 0001209191-18-047681 · doc4.xml · nonDerivative · entry 1 O'Sullivan Michael J. · CIK 0001713777 · General Counsel 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 1,025,663 F1 · shares: Represents the sale of shares to cover tax withholding obligations in connection with the settlement and release of restricted stock units ("RSUs") granted by the issuer to the reporting person. Each RSU represents a contingent right to receive one share of issuer's Class A Common Stock. F2 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.2801 to $12.54 per share, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| May 16, 2018 Filed May 18, 2018 22:09 UTC | Snap Inc SNAP · Entity 3584 | SaleClass A Common Stock | 9,810 | $10.63 | $104,280.30 |
DisclosureSEC source: 0001209191-18-031550 · doc4.xml · nonDerivative · entry 1 O'Sullivan Michael J. · CIK 0001713777 · General Counsel 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 1,036,311 F1 · shares: Represents the sale of shares to cover tax withholding obligations in connection with the settlement and release of restricted stock units ("RSUs") granted by the issuer to the reporting person. Each RSU represents a contingent right to receive one share of issuer's Class A Common Stock. F2 · balance_after: As reported on a Form 4 filed on September 8, 2017, the reporting person was granted 1,065,385 RSUs, of which 10% vest in equal quarterly installments during the first 12 months of continuous service from August 15, 2017; 20% vest in equal quarterly installments during the second 12-month period of reporting person's continuous service; 30% vest in equal quarterly installments during the third 12-month period of reporting person's continuous service; and 40% vest in equal quarterly installments during the fourth 12-month period of reporting person's continuous service. Read SEC document |
| February 16, 2018 Filed Feb 21, 2018 02:31 UTC | Snap Inc SNAP · Entity 3584 | SaleClass A Common Stock | 9,248 | $20.25 | $187,285.87 |
DisclosureSEC source: 0001209191-18-011777 · doc4.xml · nonDerivative · entry 1 O'Sullivan Michael J. · CIK 0001713777 · General Counsel 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 1,046,121 F1 · shares: Represents the sale of shares to cover tax withholding obligations in connection with the settlement and release of restricted stock units ("RSUs") granted by the issuer to the reporting person. Each RSU represents a contingent right to receive one share of issuer's Class A Common Stock. F2 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.04 to $20.63 per share, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. F3 · balance_after: As reported on a Form 4 filed on September 8, 2017, the reporting person was granted 1,065,385 RSUs, of which 10% vest in equal quarterly installments during the first 12 months of continuous service from August 15, 2017; 20% vest in equal quarterly installments during the second 12-month period of reporting person's continuous service; 30% vest in equal quarterly installments during the third 12-month period of reporting person's continuous service; and 40% vest in equal quarterly installments during the fourth 12-month period of reporting person's continuous service. F4 · balance_after: If the reporting person dies while in continuous service, the service-based requirement will be satisfied as to 100% of the RSUs for which the service-based requirement otherwise already was not satisfied. Read SEC document |
| November 16, 2017 Filed Nov 21, 2017 02:30 UTC | Snap Inc SNAP · Entity 3584 | SaleClass A Common Stock | 10,016 | $12.54 | $125,584.61 |
DisclosureSEC source: 0001209191-17-061913 · doc4.xml · nonDerivative · entry 1 O'Sullivan Michael J. · CIK 0001713777 · General Counsel 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 1,055,369 F1 · shares: Represents the sale of shares to cover tax withholding obligations in connection with the settlement and release of restricted stock units ("RSUs") granted by the issuer to the reporting person. Each RSU represents a contingent right to receive one share of issuer's Class A Common Stock. F2 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.38 to $12.67 per share, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. F3 · balance_after: As reported on a Form 4 filed on September 8, 2017, the reporting person was granted 1,065,385 RSUs, of which 10% vest in equal quarterly installments during the first 12 months of continuous service from August 15, 2017; 20% vest in equal quarterly installments during the second 12-month period of reporting person's continuous service; 30% vest in equal quarterly installments during the third 12-month period of reporting person's continuous service; and 40% vest in equal quarterly installments during the fourth 12-month period of reporting person's continuous service. F4 · balance_after: If the reporting person dies while in continuous service, the service-based requirement will be satisfied as to 100% of the RSUs for which the service-based requirement otherwise already was not satisfied. Read SEC document |
| September 08, 2017 Filed Sep 9, 2017 01:33 UTC | Snap Inc SNAP · Entity 3584 | GrantClass A Common Stock | 1,065,385 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-17-052173 · doc4.xml · nonDerivative · entry 1 O'Sullivan Michael J. · CIK 0001713777 · General Counsel 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 1,065,385 F1 · shares: Represents shares issuable on settlement of restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock. 10% of the RSUs will have the service-based requirement satisfied in equal quarterly installments during the first 12 months of continuous service from August 15, 2017; 20% of the RSUs will have the service-based requirement satisfied in equal quarterly installments during the second 12-month period of reporting person's continuous service; 30% of the RSUs will have the service-based requirement satisfied in equal quarterly installments during the third 12-month period of reporting person's continuous service; and 40% of the RSUs will have the service-based requirement satisfied in equal quarterly installments during the fourth 12-month period of reporting person's continuous service. Read SEC document |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.